A Novel Approach for the Thermal Management. of PC Power Supply

Size: px
Start display at page:

Download "A Novel Approach for the Thermal Management. of PC Power Supply"

Transcription

1 ISTP-16, 005, PRAGUE 16 TH INTERNATIONAL SYMPOSIUM ON TRANSPORT PHENOMENA A Novel Approach for the Thermal Management of PC Power Supply Fu-Sheng Chuang*, Sheam-Chyun Lin, Jon-Ting Kuo, Chien-An Chou Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan, ROC Yu-Shan Luo, Yung-Tai Chou Department of Mechanical Engineering, Tung-Nan Institute of Technology, Taipei, Taiwan, R.O.C. *Corresponding author: fschuang@mail.ntust.edu.tw, Tel: Fax: Keywords: Axial-flow Fan, Centrifugal Fan, Heat Sink, Power Supply Abstract This study intends to improve the efficiency of PC power supply by using the numerical analysis and experimental method to raise the heat dissipation of the power supply and obtain high performance and low noise effect of the device. Most power supply used today utilizes 8-cm axial-flow fan. In order to overcome the high system impedance, the fan usually has to provide high pressure and thus generate high noise. And because of the limitation of the flow direction, the fan must be placed sideway to the power supply. This position will cause the exit flow to be mostly at low temperature. In this study, we plan to put a centrifugal fan on top of the power supply. This centrifugal fan sucks in the high temperature air inside power supply and expels it from the opening at the side plate. This deployment greatly improves the heat dissipation performance. Furthermore, the cross-sectional area of the upper plate is cm, we can use a 14-cm centrifugal fan. Thus the heat dissipation is enhanced and noise is decreased. The new developed cooling fan uses radiating blades with curled flow channel. The parametric studies of the entrance and shrouded effect were conducted. Best geometry with entrance area of 90 cm was found. At the same operating speed, the new fan s maximum flow rate was 5.% better than the referenced fan, and the maximum static pressure increased 48.9%. The shrouded effect was also better. Flotherm software was then used to analyze the heat dissipation of power supply. Various parameters such as fin length, width, height, casing s opening, the electronic part s positions were studied. Temperature distribution was found. The results show that the increasing of the fin s volume and variation of the position of the electronic part can reduce the temperature decisively. 1 Introduction Computer system s stability and durability is closely related to the power supply. In recent years, the development of power supply is heading toward cheaper price, low noise, high 1

2 Fu-Sheng Chuang, Sheam-Chyun Lin, Jon-Ting Kuo, Chien-An Chou, Yu-Shan Luo, Yung-Tai Chou efficiency, and better heat dissipation. Among them, the requirement of low noise is the most urgent. Owing to the high heat production in the computer, power supply also plays a role in helping dissipate heat to the outside. In current market, most of the power supply is cm (Fig.1) in dimension, including transformer, capacitance, fin, inductance etc. This study intends to replace the axial-flow fan traditionally used with centrifugal fan, and places the fan on the upper side of the casing to help dissipate the heat. Because of the rising trend of hot air, the fan can thus suck in lots of hot air. Also we can use the top surface of the power supply casing, which is cm in area to mount the fan. This will yield a larger area than the original cm area used by 8-cm axial-flow fan. With the larger-sized fan used, the operating speed can thus be reduced to meet the lower noise requirement. And the horizontally placed new fan can reduce the vertical loading of its own weight on the bearing. The lifetime of the fan will be longer. In this study, a newly designed fan blade was developed and placed in the housing of the traditional centrifugal fan. The advantages of the centrifugal fan, such as high-static pressure, low noise and high flow rate were preserved. Regarding the fan study, in 1996 and 1997, Horng and Lu [1, ] had done some works on the noise of forward aligned and backward aligned centrifugal fan. They found that with increasing tongue angle, the maximum flow rate decreased, the power input was lower, static pressure increases slightly. The efficiency had no significant improvement. But noise was reduced. They concluded that if the flow rate or pressure was the major concerns of the fan, tongue angle should be an important parameter for consideration. In 001, Shu and Yu [, 4] used fan-blade theory to design a radial and flat radiating blade and put it in a centrifugal fan casing. They changed various geometric parameters, such as blade number, blade angle etc. and had done a complete study on the fan performance and noise. In the aspect of system simulation, in 1999, Wang [5] used Flotherm software to analyze notebook computer with various types of heat sink inside. In this study, we used the centrifugal fan in place of traditional axial-flow fan, and horizontally placed it on top of the power supply casing. The consideration is due to: (1) Usually, axial-flow fan is placed vertically in the casing (Fig. 1). The heat released by power supply causes the hot air to rise. Hence the fan s lower part can only suck in cold air. The cooling efficiency is thus smaller. But the centrifugal fan can be horizontally placed on top of power supply (Fig. ). It has a direct contact with hot air, and gets higher efficiency. () The components in the power supply cause large system impedance. This requires high-static pressure fan. The centrifugal fan s high-pressure characteristics suit this need. () Vertical-aligned fan produces side-loading on the bearing due to its weight, which causes the wearing of the bearing and reduces the operating life. On the contrary, horizontally aligned fan will not have this bad effect. The lifetime of the bearing can thus be longer. (4) Traditional power supply has a large opening. The components inside can be seen through

3 A NOVEL APPROACH FOR THE THERMAL MANAGEMENT OF PC POWER SUPPLY this opening. Dust and insects can also easily get inside. Small opening for a centrifugal fan prevent the occurrence of this situation. The new cooling fan uses NACA-441 blade shape with 85 angle and 9 blades. First, the mock-up was made by using CNC. Second, various parametric studies were performed, such as varying fin s length, height, thickness, and position etc. The objectives were to achieve low noise and low heat resistance. Next, by combining the heat sink with fan, the relative position of the electronic components, the inlet and exit position and area, the whole system was analyzed to obtain its velocity and temperature fields. From this result, optimal modification of the system was expected to be achieved. Experimental Apparatus The fan performance test in this study uses Air Movement and Control Association (AMCA) standard AMCA [6] and the noise test were using Chinese National Standard CNS-895 [7], with the usage of semi-anechoic chamber. This section describes some details of fan test, noise measurement and the operation of loading machine..1 Fan Performance Measurement The body of the equipment of the fan performance measurement is set up according to AMCA regulations. It includes main body, rectifier plate, multi-nozzle, and auxiliary fan. This will provide a good flow field for measurement. For the sake of good measurement, good measuring devices, data acquisition system, and other assisting devices are also needed.. Noise Measurement Sound level meter connected with Frequency Analyzer was used in this study. Narrow band and board band noise can he obtained. (I) Sound pressure system-noise measurement system comprises of multifunction sound pressure meter and double-band FFT analyzer. (II) Measuring Environment semi-anechoic chamber was used to conduct noise measurements. The positions of various equipments were shown on Fig... Loading Machine The loading experiment of the power supply was accomplished by using FA-88 ATE loading machine by Hwa-Da Company. The experiment can be automatically executed through computer control. The experiment includes: loading current test, on-time test, off-time test, short circuit protection test, voltage adjustment test, Rise time, power efficiency and short-circuit efficiency. And the temperature measurement at some positions in power supply under full load had also been made.. Experimental Program The whole experiment can be divided into three parts. First part is to improve the fan s performance. A new prototype mm fan with curled flow channel was produced by using CNC. Another A-brand centrifugal fan was chosen to compare with. Then the new fan was studied for various inlet areas to investigate the influence on its performance and noise production. In addition, for testing the capability of overcoming high system impedance, a plate of 1 1 m was placed in front of the inlet of the new fan and a B-brand axial-flow fan (Fig.4). The distance between fan and plate was adjusted. The second part is to find the way of reducing power supply heat production. Flotherm was

4 Fu-Sheng Chuang, Sheam-Chyun Lin, Jon-Ting Kuo, Chien-An Chou, Yu-Shan Luo, Yung-Tai Chou used to do some parametric studies. The temperature distribution in the power supply was obtained. Then the influence of the opening of the casing was studied. The third part is to conduct the actual measurement of the temperature of the electronic parts in the power supply under full load, the measurement of the air temperature at the exit plane, and the noise. At the same noise condition, heat dissipation capability of the new centrifugal fan was compared with the traditionally axial-flow fan..1 The Design and Experiment of a New Fan (1) Rotor design NACA cross-section was chosen as the - D base, and then extended out to form the -D blade. Prototype of the blade was made for further performance testing. () Variation of the inlet area The excess flow through the tip of the blade will greatly influence the performance of the fan. Thus the inlet area was reduced to study its effect on the performance and noise production. () Shroud effect To test the capability of overcoming high system impedance, an 8-cm axial flow fan and a 14-cm new fan (Fig.5) were used to study the performance. A plate of 1 1 m was placed in front of the inlet of both fans. The distance was adjusted and the performance was tested.. Numerical Simulation of Power Supply (1) Change of fan Flotherm was used to calculate the temperature distribution for the power supply using traditional fan and the new fan. The temperature at seven hot spots in the power supply (Fig. 6) was compared. The result of the simulation was used for further modification. () The increase of fin s number and volume The volume of fin (Fig. 7) and number of fin (Fig. 8) was changed for the heat sink used in the power supply. Its effect has been studied.. The Experiment for Power Supply The comparison of maximum temperature and noise for different power supply was conducted. The new fan was combined with the power supply. Under the full loading, the maximum temperature inside the power supply and the noise generation of this assembly was measured and compared with those of the power supply with traditional fan. 4. Numerical Simulation The physical model of the numerical simulation should be close to the real model in order to obtain the realistic and meaningful result. The model is as shown in Fig Code and Grid Verifications In this study the numerical result was compared with the experimental results at seven measuring points of a full-loaded power supply. This can be used to verify the validity of the program. In the grid verification. From the result shown in Table 1, 1.6-million grid system was chosen for all the later studies. In addition, a 1.5-million grid system was used to run the program with 00, 500, 700, 1000 iterations. When the iteration number reaches 700 (Fig.10), the temperature at all the monitored points has stabilized. Thus, 1.6 million grid point and 700 iterations are selected 4. Experimental and Numerical Comparison Seven monitored points were chosen in a full-load power supply for measurement. These experimental results were compared with those of 4

5 A NOVEL APPROACH FOR THE THERMAL MANAGEMENT OF PC POWER SUPPLY the numerical simulation. From Fig.11, we can see the operating point of the fan is 11 cfm for the experiment, and 1 cfm for the numerical result. The difference is 1cfm. The main reason for this is in the numerical simulation, some small components in the power supply were neglected. This will cause the system impedance to be smaller. The error is still in the acceptable range. Table shows the result for temperature. The error is all below.5%. 5 Results and Discussions The presentation of the result of this study will be divided into three parts. The first part is about fan performance. The second part is on the numerical study of the power supply. And the third part is on the experiment of power supply. 5.1 Fan Performance The fan performance of the traditional axial-flow fan and the new centrifugal fan will be compared for various inlet areas. Shrouded effect will also be studied Variation of the Inlet Area A. Axial-flow Fan Table shows the result for the referenced axial-flow fan. The point for maximum flow rate has an optimal value as the inlet area decreased when the inlet diameter is 96 mm; the flow rate has the largest increment, which is 14.97%. The maximum static pressure is increased as the inlet area decreased. The most is when the inlet diameter is 86 mm, static pressure increases 68.77%. The reason for these is when the fluid flow through the blade channel, there is separation and some excessive flow is recirculating, which hinder the flow into the blade rotor and thus reduces the flow rate. At the same time, such disturbing flow will generate noise. From Table 4, varying the inlet diameter has little effect on the total noise level. The noise at the inlet (monitored point 1) is about dba. At the exit (points and ), the lowest noise is 7 dba, when the inlet diameter is 106mm. In summary, the referenced axial-flow fan has an better flow rate, an increasing maximum static pressure as the inlet diameter is decreased. However, there is no significant acoustic change. B. New Fan For the new fan, experiment was conducted for inlet diameter of 10, 96, 90mm respectively. The result is as shown in Table 5. The max flow rate decreases as inlet get smaller. When inlet diameter is 10mm, largest max flow rate was obtained. The result for inlet diameter of 90mm decreased 4.5%. The maximum static pressure increases as the inlet area decreases. The 90mm diameter has the highest increment of 5.7% On the maximum flow rare, the result shows new fan changes very little as the inlet area changes. The reason is that the recirculation effect between the blade tip and casing is small, thus changing of inlet area would not have much influence on max flow rate. On static pressure, due to the decrease of inlet area, the incoming flow velocity is increased. This produces higher-pressure gradient in the flow channel and hence maximum static pressure increases. Table 6 shows the result of noise measurement. At the inlet, inlet diameter of 90 has the min. noise level of 8.5 dba. At the outlet, diameter of 10mm has the minimum noise of 7.0dBA. Because when the inlet diameter is smaller the volume flow rate will also be smaller. Less 5

6 Fu-Sheng Chuang, Sheam-Chyun Lin, Jon-Ting Kuo, Chien-An Chou, Yu-Shan Luo, Yung-Tai Chou excessive flow will strike the upper casing. The noise level will be lower Comparison of Fan Performance Considering the result of the previous measurement, inlet diameter of 90mm was chosen for the new fan (Base 1). Other two choices are the original referenced fan (Sample) and original fan with inlet diameter of 96mm (Base ). The fans are operated at 1600 rpm. The results are listed in Table 7. The maximum flow rate and static-pressure produced by Base 1 are of value 1. cfm and 11.1 mm-aq, which are 5% and 48% higher than those of sample fan. Base also has higher maximum flow rate and maximum static pressure than sample fan, which are 14.56% and 9.18% higher, respectively. Hence the performance of sample fan can be improved by simplily using a smaller inlet diameter. The final choice for this study is to choose inlet diameter of 90 mm for the new fan, which has highest maximum flow rate and static pressure. The new fan will be combined with the power supply for further study Shroud Effect In power supply, there are many electronic parts and heat sink, which will produce high system impedance. The effective use of such a narrow space to reach the high fan performance is important. Thus, and mm axial-flow fan mm new fan are selected to execute the shroud effect experiment. Fig. 1 shows the P-Q relation for the new fan as the distance between fan and stop plate changes form 1 to 8mm. For the flow rate, Fig. 1 shows the flow rate increases as the distance increases. When the distance becomes 8 mm, the Maximum flow rate has increased to 95% of that of no stop-plate case. On static pressure, Fig 14 shows the static pressure increases as distance increase. As the distance becomes 8mm, the maximum static pressure becomes 99% of that of no plate case. Thus for the new fan, within 1~8mm distance, the flow rate and max static-pressure are significantly influenced. The result is very suitable for the operation in the narrow space of a power supply. As for the axial-flow fan, the distance of stop plate has to become 70mm to reach 99% of the max flow rate of no plate case. At 75mm distance, the max static pressure is 78%. Hence in the power supply, the centrifugal fan with the characteristics of high static pressure has better performance than axial flow fan. 5. Numerical Study of the Power Supply 5..1 Different Fans The cases of the traditional fan and new fan in a power supply were studied by using the Flotherm software. Temperatures at seven monitored points as shown in Fig. 6 were obtained. As listed in Table 8, the temperatures at all the points are lower for the new fan case. The maximum decrease of 8.6 occurs at the inductance. This is because of the higher flow rate and higher static pressure produced by the new fan, which will bring more heat outside and thus lowering the temperature. 5.. Volume and Number of Heat-Sink Fin The transistors in the power supply rely on the heat sink to dissipate the heat. In this section, some changes have been made to the fin of the heat sink. The total volume of the fins was increased 8 mm (Fig. 1) and the number of fin was also varied (Fig. 14). The effect on the heat transfer was studied. Table 9 shows increasing 6

7 A NOVEL APPROACH FOR THE THERMAL MANAGEMENT OF PC POWER SUPPLY the volume of the fins appreciably decrease the temp of all the monitored points. The maximum temp of point 7 has changed 10.9 and point 5 changed 1.. This is because the fins that have its volume changed are all located on top of the 5 major heat-generating transistors. The heat generated by the transistors can thus be transferred quickly through the fins and thus yield lower temperature. For increasing the number of the fins, the lowering-temp, effect is not as pronounced as that of the increasing volume case. This may due to the total volume increment is smaller in this case than the increasing volume case. 5. The Experiment Power Supply In this part, the new fan was combined with the A-brand power supply, at the full loading of 00W, the max temp and the noise level was measured and compared with that of B-brand power supply. The temp of the transistor in the power becomes stable after 0min of the operation. The temp in A-brand is about 4 lower than brand B. This would verify that new fan in brand A power supply achieves better heat dissipation the brand B. Considering the noise, the noise level at the exit, inlet and side of the casing for brand A are.6, 1., 1.4 dba, respectively lower than brand B. In real operation, the exit of the power supply will face the user. Hence to a customer, noise at the exit is more important. Brand A has a lower noise level at the exit than brand B as indicated. 6 Conclusion This research has done a series of investigation on power supply regarding the heat dispassion and noise level. A new fan was developed to improve these two effects. New fan of inlet diameter of 96mm has increased the max, flow rate by 5.15% and increased the max static pressure by 48.90%. The new fan also has a better shroud effect than the traditional axial flow fan. In the study of the power supply, using the new fan and increasing the total volume of the fin of the heat sink has a marked effect on improving the heat dissipation of the power supply. The temp of the whole system was lower. References [1] Horng J. Y., Noise Analysis of Backward-Inclined Centrifugal Fan, Master Thesis, National Taiwan University of Science and Technology, June, [] Lu S. Y., Noise Reduction of Forward-Curved Centrifugal Fan, Master Thesis, National Taiwan University of Science and Technology, June, [] Hsu H. C., Experimental Study for a Cooling Fan Applied on Pentium 4 Notebook Computers. Master Thesis, National Taiwan University of Science and Technology, 001. [4] Yu Z. J., Numerical Study for a Cooling Fan Applied on Pentium 4 Notebook Computers. Master Thesis, National Taiwan University of Science and Technology, July, 001. [5] Wang F. M., Numerical Simulation of Notebooks. Master Thesis, National Taiwan University of Science and Technology, 001. [6] "Publication 10, Laboratory Method of Testing Fans for Rating," Air Movement and Control Association, Inc., [7] CNS 875, Determination of Sound Power Level of Noises for Fan, Blower, and Compressors, Chinese National Standard. 7

8 Fu-Sheng Chuang, Sheam-Chyun Lin, Jon-Ting Kuo, Chien-An Chou, Yu-Shan Luo, Yung-Tai Chou Table 1 Grid verification Exp. result 0.70 M grids 1.06 M grids 1.6 M grids 1.46 M grids 1.76 M grids Point Point Point Point Point Point Point Unit C Table Comparison of experimental and numerical results Exp. Temp CFD Temp Deviation (%) Point Point Point Point Point Point Point Table Comparison for various inlet areas (A axial-flow fan at 1600RPM) Inlet diameter, mm dddiameter(mm) Qmax(CFM) Increase (%) Pmax(mm -Aq) Increase (%) Table 4 Noises for various inlet areas (axial-flow fan) Inlet diameter, mm Point 1 Point Point Unit dba Table 5 Performance for various inlet areas (New centrifugal fan at 1600RPM) Inlet diameter, mm Qmax(CFM) Increase (%) Pmax(mm -Aq) Increase (%) Table 6 Noises for various inlet areas (centrifugal fan) Inlet diameter, mm Point 1 Point Point Table 7 Comparison of fan performance Unit dba Sample Base 1 Base Qmax(CFM) Increase (%) Pmax(mm -Aq) Increase (%) Table 8 Temperatures in power supply for different fans Old Fan New Fan Difference Point Point Point Point Point Point Point Unit: C Table 9 Temperature in the power supply for changing the volume and number of fin Original Fin Increasing Increasing Fin Volume Fin Number Point Point Point Point Point Point Point Unit: C Fig. 1 Traditional fan position in power supply 8

9 A NOVEL APPROACH FOR THE THERMAL MANAGEMENT OF PC POWER SUPPLY Fig. New centrifugal fan position in power supply Fig. 6 Positions of the measured points in power supply Point 1 1 m Test Fan Inlet Outlet 1 m o 45 o 45 1 m Point Point Fig. Measuring positions of microphones inside a semi-anechoic chamber Fig. 7 Increase of heat-sink fin s volume Fig. 4 Schematics for shroud-effect experiment Fig. 8 Increase of heat-sink fin s number Fig. 9 Physical model of the numerical simulation Fig. 5 Schematic diagram of new centrifugal fan 9

10 Fu-Sheng Chuang, Sheam-Chyun Lin, Jon-Ting Kuo, Chien-An Chou, Yu-Shan Luo, Yung-Tai Chou.5.5 1mm mm mm 4mm 5mm 6mm 7mm 8mm free Ps(mm-Aq) Fig.10 Convergence after 700 iterations Q(CFM) FAN SYSTEM Fig. 1 The P-Q curves of new fan under shroud effect Ps(in-HO) Q(CFM) (a) The experimental operating point AirFlowRate(%) CentrifugalFlowFan AxialFlow Fan Distance(mm) Fig. 1 Flow rate of fans for various stop-plate distance (b) The numerical operating point Fig. 11 Comparison on the operating points from experiment and simulation for 00W power supply Staticpressure(%) CentrifugalFan AxialFlowFan Distance(mm) Fig. 14 Fan static pressure for various stop-plate distance 10

Effects of Volute Tongue Clearance and Rotational Speed on Performance of Centrifugal Blower Nitin S. Jadhav *, S. R. Patil

Effects of Volute Tongue Clearance and Rotational Speed on Performance of Centrifugal Blower Nitin S. Jadhav *, S. R. Patil 2016 IJSRSET Volume 2 Issue 4 Print ISSN : 2395-1990 Online ISSN : 2394-4099 Themed Section: Engineering and Technology Effects of Volute Tongue Clearance and Rotational Speed on Performance of Centrifugal

More information

Performance Analysis of Centrifugal Fan by CFD

Performance Analysis of Centrifugal Fan by CFD Performance Analysis of Centrifugal Fan by CFD Jaykumar Gajjar #1, Prof. Chetan Vora *2, Prof. Vipulkumar Rokad $3 # PG student Mechanical Department, Kalol Institute of Technology and Research Centre

More information

inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE

inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 1.0 STUDY OF AEROACOUSTIC PHENOMENONS AT DUCTED COOLING

More information

Effect of Flow Distortion in Inlet Duct on the Performance of Centrifugal Blower

Effect of Flow Distortion in Inlet Duct on the Performance of Centrifugal Blower Effect of Flow Distortion in Inlet Duct on the Performance of Centrifugal Blower Kalpesh W. Shirsath 1, S.R. Patil 2, Sumit M. Naik 3 PG Student 1,3, Assistant Professor 2 Department of Mechanical Engineering

More information

Design And Analysis Of Centrifugal Pump

Design And Analysis Of Centrifugal Pump Design And Analysis Of Centrifugal Pump GUIDED BY: Assistant Professor Jayendra B. Patel PRESENTED BY: Makwana Hardik Modh Hiren Patel Gaurang Patel Dhaval 1 Introduction It Convert the mechanical energy

More information

Basic Input Data Needed to Develop a High Performance Fan/Blower with Low Noise, Energy Saving and High Efficiency

Basic Input Data Needed to Develop a High Performance Fan/Blower with Low Noise, Energy Saving and High Efficiency Basic Input Data Needed to Develop a High Performance Fan/Blower with Low Noise, Energy Saving and High Efficiency Haiye Lou TurboMoni Applied Dynamics Lab Abstract It is often happened, when a project

More information

Performance evaluation of an innovative fan-coil unit: Low-temperature differential variable air volume FCU

Performance evaluation of an innovative fan-coil unit: Low-temperature differential variable air volume FCU Energy and Buildings 39 (2007) 702 708 www.elsevier.com/locate/enbuild Performance evaluation of an innovative fan-coil unit: Low-temperature differential variable air volume FCU Ming-Tsun Ke a, *, Kuo-Liang

More information

REDUCTION OF NOISE AND VIBRATION OF FRONT LOADING WASHING MACHINE IN SPIN-CYCLE

REDUCTION OF NOISE AND VIBRATION OF FRONT LOADING WASHING MACHINE IN SPIN-CYCLE ICSV14 Cairns Australia 9-12 July, 2007 REDUCTION OF NOISE AND VIBRATION OF FRONT LOADING WASHING MACHINE IN SPIN-CYCLE Young-hyun Kim 1, Seoung-jin Seo 2, Hong-seok Ko 1 and Hyung-gyoon Kim 1 1 Samsung

More information

CHAPTER I INTRODUCTION. In the modern life, electronic equipments have made their way

CHAPTER I INTRODUCTION. In the modern life, electronic equipments have made their way 1 CHAPTER I INTRODUCTION In the modern life, electronic equipments have made their way in to practically every part, which is from electronic gadgets to high power computers. Electronic components have

More information

Modeling and Simulation of Axial Fan Using CFD Hemant Kumawat

Modeling and Simulation of Axial Fan Using CFD Hemant Kumawat Modeling and Simulation of Axial Fan Using CFD Hemant Kumawat Abstract Axial flow fans, while incapable of developing high pressures, they are well suitable for handling large volumes of air at relatively

More information

Optimized Finned Heat Sinks for Natural Convection Cooling of Outdoor Electronics

Optimized Finned Heat Sinks for Natural Convection Cooling of Outdoor Electronics Journal of Electronics and Information Science (2018) 3: 22-33 Clausius Scientific Press, Canada Optimized Finned Heat Sinks for Natural Convection Cooling of Outdoor Electronics Lian-Tuu Yeh, ASME Fellow

More information

CASE HISTORY: RETROFIT OF COAL MILL EXHAUST FAN STUDY OF FAN PERFORMANCE AND EROSION

CASE HISTORY: RETROFIT OF COAL MILL EXHAUST FAN STUDY OF FAN PERFORMANCE AND EROSION CASE HISTORY: RETROFIT OF COAL MILL EXHAUST FAN STUDY OF FAN PERFORMANCE AND EROSION David R. Grupp Director of Research Robinson Industries, Inc. 400 Robinson Drive Zelienople, PA 16063 CASE HISTORY:

More information

Compression of Fins pipe and simple Heat pipe Using CFD

Compression of Fins pipe and simple Heat pipe Using CFD Compression of Fins pipe and simple Heat pipe Using CFD 1. Prof.Bhoodev Mudgal 2. Prof. Gaurav Bhadoriya (e-mail-devmudgal.mudgal@gmail.com) ABSTRACT The aim of this paper is to identify the advantages

More information

Modeling of Ceiling Fan Based on Velocity Measurement for CFD Simulation of Airflow in Large Room

Modeling of Ceiling Fan Based on Velocity Measurement for CFD Simulation of Airflow in Large Room Modeling of Ceiling Fan Based on Velocity Measurement for CFD Simulation of Airflow in Large Room Y. Momoi 1, K. Sagara 1, T. Yamanaka 1 and H. Kotani 1 1 Osaka University, Graduate School of Eng., Dept.

More information

CFD Analysis of temperature dissipation from a hollow metallic pipe through circular fins using Ansys 14.5

CFD Analysis of temperature dissipation from a hollow metallic pipe through circular fins using Ansys 14.5 IJAET International Journal of Application of Engineering and Technology ISSN: 2395-3594 Vol-1 No.-2 CFD Analysis of temperature dissipation from a hollow metallic pipe through circular fins using Ansys

More information

CFD Analysis of a 24 Hour Operating Solar Refrigeration Absorption Technology

CFD Analysis of a 24 Hour Operating Solar Refrigeration Absorption Technology IJIRST International Journal for Innovative Research in Science & Technology Volume 1 Issue 11 April 2015 ISSN (online): 2349-6010 CFD Analysis of a 24 Hour Operating Solar Refrigeration Absorption Technology

More information

Optimized fan system design for the one-year cycle of a Heat Pump. Ziehl-Abegg SE Frieder Lörcher

Optimized fan system design for the one-year cycle of a Heat Pump. Ziehl-Abegg SE Frieder Lörcher Optimized fan system design for the one-year cycle of a Heat Pump Ziehl-Abegg SE Frieder Lörcher Outline Targets for the energetical optimization of fan unit Numerical optimization procedure Results with

More information

Finned Heat Sinks for Cooling Outdoor Electronics under Natural Convection

Finned Heat Sinks for Cooling Outdoor Electronics under Natural Convection Finned s for Cooling Outdoor Electronics under Natural Convection Lian-Tuu Yeh, Ph D & PE Thermal Consultant, Dallas, TX, 75252 USA Abstract For tower or poled mounted electronics, the heat sink weight

More information

STUDY ON TEMPERATURE, RH AND AIR FLOW VELOCITY DISTRIBUTION INSIDE THE GREENHOUSE EFFECT SOLAR DRYER

STUDY ON TEMPERATURE, RH AND AIR FLOW VELOCITY DISTRIBUTION INSIDE THE GREENHOUSE EFFECT SOLAR DRYER STUDY ON TEMPERATURE, RH AND AIR FLOW VELOCITY DISTRIBUTION INSIDE THE GREENHOUSE EFFECT SOLAR DRYER WULANDANI, D., K. ABDULLAH, E. HARTULISTIYOSO Department of Agricultural Engineering, Faculty of Agricultural

More information

ICSV14. Cairns Australia 9-12 July, Noise reduction of handheld vacuum cleaners according to geometric optimization of air passages

ICSV14. Cairns Australia 9-12 July, Noise reduction of handheld vacuum cleaners according to geometric optimization of air passages ICSV14 Cairns Australia 9-12 July, 2007 Noise reduction of handheld vacuum cleaners according to geometric optimization of air passages M.J. Mahjoob and H.Ashrafi Noise, Vibration, Acoustics (NVA) research

More information

Study of Hot-air Recirculation around Off-road Tier-4 Diesel Engine Unit Using CFD Abbreviations Keywords Abstract Introduction and Background

Study of Hot-air Recirculation around Off-road Tier-4 Diesel Engine Unit Using CFD Abbreviations Keywords Abstract Introduction and Background Study of Hot-air Recirculation around Off-road Tier-4 Diesel Engine Unit Using CFD Siddharth Jain, Yogesh Deshpande, Atul Bokane, Arun Kumar Santharam, and Deepak Babar, Halliburton Abbreviations: Computational

More information

Analysis of the influence of open door size on fire smoke diffusion law in protective engineering

Analysis of the influence of open door size on fire smoke diffusion law in protective engineering Analysis of the influence of open door size on fire smoke diffusion law in protective engineering Abstract Zheli Xing a, Jinfeng Mao b, Chaofeng Li c and Jin Zhou d PLA University of Science and Technology,

More information

Purdue e-pubs. Purdue University

Purdue e-pubs. Purdue University Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 206 Experimental Investigation of the Refrigerant Flow Distribution Characteristic

More information

Performance Evaluation and Design Optimization of Refrigerated Display Cabinets Through Fluid Dynamic Analysis

Performance Evaluation and Design Optimization of Refrigerated Display Cabinets Through Fluid Dynamic Analysis Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2008 Performance Evaluation and Design Optimization of Refrigerated Display

More information

Induction heating with the ring effect for injection molding plates

Induction heating with the ring effect for injection molding plates Induction heating with the ring effect for injection molding plates article info abstract Available online 8 March 2012 Keywords: Dynamic mold temperature control Induction heating Inductor design Induction

More information

Numerical study of heat pipe application in heat recovery systems

Numerical study of heat pipe application in heat recovery systems Numerical study of heat pipe application in heat recovery systems *Song Lin, John Broadbent, Ryan McGlen Thermacore Europe, 12 Wansbeck Business Park Ashington, Northumberland NE3 QW, UK E-mail: song.lin@thermacore.com

More information

we make air move Double Inlet Centrifugal Fans (Forward Curved) FBD Series (Square Outlet Metric Size)

we make air move Double Inlet Centrifugal Fans (Forward Curved) FBD Series (Square Outlet Metric Size) we make air move Double Inlet Centrifugal Fans (Forward Curved) FBD Series (Square Outlet Metric Size) www.blowtech.in we make air move Blowtech Air Devices Pvt. Ltd. was founded in 1988 and quickly established

More information

High-efficiency Turbo Chiller (NART Series)

High-efficiency Turbo Chiller (NART Series) 67 High-efficiency Turbo Chiller (NART Series) Wataru Seki* 1 Kenji Ueda* 1 Jyou Masutani* 2 Yoichirou Iritani* 2 Turbo chillers are widely used for district heating and cooling, heat storage (regeneration)

More information

EVALUATING LOOP HEAT PIPE PERFORMANCE IMPROVEMENT USING CIRCUMFERENTIAL GROOVES. Nadjara dos Santos, Roger R. Riehl

EVALUATING LOOP HEAT PIPE PERFORMANCE IMPROVEMENT USING CIRCUMFERENTIAL GROOVES. Nadjara dos Santos, Roger R. Riehl Abstract EVALUATING LOOP HEAT PIPE PERFORMANCE IMPROVEMENT USING CIRCUMFERENTIAL GROOVES Nadjara dos Santos, Roger R. Riehl National Institute for Space Research INPE - Space Mechanics and Control Division-DMC

More information

EXPERIMENTAL ANALYSIS OF TIP CLEARANCE AND CHORD LENGTH FOR OPTIMUM DESIGN OF AXIAL FLOW FAN IN AIR COOLED HEAT EXCHANGER

EXPERIMENTAL ANALYSIS OF TIP CLEARANCE AND CHORD LENGTH FOR OPTIMUM DESIGN OF AXIAL FLOW FAN IN AIR COOLED HEAT EXCHANGER EXPERIMENTAL ANALYSIS OF TIP CLEARANCE AND CHORD LENGTH FOR OPTIMUM DESIGN OF AXIAL FLOW FAN IN AIR COOLED HEAT EXCHANGER Sushil Kumar 1, Dr. V.N.Bartaria 2 1 M.Tech Scholar, 2 Professor & HOD Dept. of

More information

Thermal Performance of a Loop Thermosyphon

Thermal Performance of a Loop Thermosyphon Tamkang Journal of Science and Engineering, Vol. 13, No. 3, pp. 281 288 (2010) 281 Thermal Performance of a Loop Thermosyphon Shung-Wen Kang*, Meng-Chang Tsai, Chih-Sheng Hsieh and Jian-You Chen Department

More information

FABRICATING A HEAT PIPE STRUCTURE WITHIN A RADIATING PLATE FOR ELECTRONICS FAN-LESS COOLING

FABRICATING A HEAT PIPE STRUCTURE WITHIN A RADIATING PLATE FOR ELECTRONICS FAN-LESS COOLING Journal of Marine Science and Technology, Vol. 18, No. 3, pp. 419-423 (2010) 419 FABRICATING A HEAT PIPE STRUCTURE WITHIN A RADIATING PLATE FOR ELECTRONICS FAN-LESS COOLING Chun-Sheng Yu*, Shung-Wen Kang*,

More information

Development of Large Size Hybrid Fan

Development of Large Size Hybrid Fan Technical Paper Toshihiko Nishiyama Kengo Koshimizu Keiichi Inaba A lot of small fans with three-dimensional, wide chord length, forward swept figure, and/or shroud ring have been developed and manufactured

More information

A STUDY ON THE DEVELOPMENT OF A DEODORIZATION UNIT FOR THE TOILET BIDET

A STUDY ON THE DEVELOPMENT OF A DEODORIZATION UNIT FOR THE TOILET BIDET A STUDY ON THE DEVELOPMENT OF A DEODORIZATION UNIT FOR THE TOILET BIDET I. S. Hwang and Y. L. Lee Department of Mechanical Engineering, Kongju National University, Korea E-Mail: ylee@kongju.ac.kr ABSTRACT

More information

International Forum on Energy, Environment Science and Materials (IFEESM 2015)

International Forum on Energy, Environment Science and Materials (IFEESM 2015) The Comparison and Analysis of Humidity Environment between Floor and Ceiling Radiant Cooling Systems that Combined with Displacement Ventilation Kai SUN 1 a *, Chuan-hui ZHOU 1 1 College of Urban Construction,

More information

EXPERIMENTAL ACOUSTIC CHARACTERIZATION OF A WET VACUUM CLEANER

EXPERIMENTAL ACOUSTIC CHARACTERIZATION OF A WET VACUUM CLEANER EXPERIMENTAL ACOUSTIC CHARACTERIZATION OF A WET VACUUM CLEANER Cinzia Buratti, Elisa Moretti and Michele Urbani Department of Industrial Engineering, University of Perugia, via G. Duranti 67, 06125 Perugia,

More information

Analysis of Constant Pressure and Constant Area Mixing Ejector Expansion Refrigeration System using R-1270 as Refrigerant

Analysis of Constant Pressure and Constant Area Mixing Ejector Expansion Refrigeration System using R-1270 as Refrigerant Analysis of Constant Pressure and Constant Area Mixing Ejector Expansion Refrigeration System using R-1270 as Refrigerant Ravi Verma 1, Sharad Chaudhary 2 1, 2 Department of Mechanical Engineering, IET

More information

Australian Journal of Basic and Applied Sciences

Australian Journal of Basic and Applied Sciences AENSI Journals Australian Journal of Basic and Applied Sciences ISSN:1991-8178 Journal home page: www.ajbasweb.com Design and Experimental Investigation of Forward Curved, Backward Curved and Radial Blade

More information

Improving Heating Performance of a MPS Heat Pump System With Consideration of Compressor Heating Effects in Heat Exchanger Design

Improving Heating Performance of a MPS Heat Pump System With Consideration of Compressor Heating Effects in Heat Exchanger Design Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2006 Improving Heating Performance of a MPS Heat Pump System With Consideration

More information

Important Considerations When Selecting a Fan for Forced Air Cooling. By: Jeff Smoot, CUI Inc

Important Considerations When Selecting a Fan for Forced Air Cooling. By: Jeff Smoot, CUI Inc Important Considerations When Selecting a Fan for Forced Air Cooling By: Jeff Smoot, CUI Inc Designing an appropriate thermal management solution requires a systemic approach; each component on a circuit

More information

Development of the San Ace Airflow Tester - A Measuring Device for System Impedance and Operating Airflow of Equipment

Development of the San Ace Airflow Tester - A Measuring Device for System Impedance and Operating Airflow of Equipment New Products Introduction Development of the San Ace Airflow Tester - A Measuring Device for System Impedance and Operating Airflow of Equipment Katsumichi Ishihara Yo Muramatsu Takahisa Toda Masahiro

More information

Fans: Features and Analysis

Fans: Features and Analysis Technical Development Program COMMERCIAL HVAC EQUIPMENT Fans: Features and Analysis PRESENTED BY: Michael Ho Version 1.2 Menu Section 1 Section 2 Section 3 Section 4 Section 5 Section 6 Section 7 Section

More information

Analysis of Centrifugal Pump with Closed Type Impeller for Slurry Operations

Analysis of Centrifugal Pump with Closed Type Impeller for Slurry Operations Analysis of Centrifugal Pump with Closed Type Impeller for Slurry Operations N.Subramani 1, Dr.J.Ganesh Murali 2, Dr.P.Suresh 3, J.Anish Jafrin Thilak 4, V.V.Arunsankar 5 Assistant Professor, Department

More information

Heat Transfer Enhancement using Herringbone wavy & Smooth Wavy fin Heat Exchanger for Hydraulic Oil Cooling

Heat Transfer Enhancement using Herringbone wavy & Smooth Wavy fin Heat Exchanger for Hydraulic Oil Cooling Enhancement using Herringbone wavy & Smooth Wavy fin Exchanger for Hydraulic Oil Cooling 1 Mr. Ketan C. Prasadi, 2 Prof. A.M. Patil 1 M.E. Student, P.V.P.I.T.,Budhagaon,Sangli AP-India 2 Associate Professor,

More information

Development of a Compact High Efficiency Cooling Device for the PA8000 Processor*

Development of a Compact High Efficiency Cooling Device for the PA8000 Processor* Development of a Compact High Efficiency Cooling Device for the PA8000 Processor* Guy R. Wagner Hewlett-Packard Co., Fort Collins Systems Laboratory 3404 E. Harmony Road Fort Collins, Colorado 80525 Phone:

More information

The Design Of A New Generation Of Twin Screw Refrigeration Compressors

The Design Of A New Generation Of Twin Screw Refrigeration Compressors Purdue University Purdue e-pubs International Compressor Engineering Conference School of Mechanical Engineering 2002 The Design Of A New Generation Of Twin Screw Refrigeration Compressors Z. Xing Xi an

More information

Healthy Buildings 2017 Europe July 2-5, 2017, Lublin, Poland. Experimental study of a novel dew point indirect evaporative cooler

Healthy Buildings 2017 Europe July 2-5, 2017, Lublin, Poland. Experimental study of a novel dew point indirect evaporative cooler Healthy Buildings 2017 Europe July 2-5, 2017, Lublin, Poland Paper ID 0232 ISBN: 978-83-7947-232-1 Experimental study of a novel dew point indirect evaporative cooler Wenhua Chen, Zhiwei Zhang, Jiayu Li,

More information

Experimental Investigation of Elliptical Tube Bank Cross Flow Heat Exchanger with Inline Arrangement & 45 Angle of Attack

Experimental Investigation of Elliptical Tube Bank Cross Flow Heat Exchanger with Inline Arrangement & 45 Angle of Attack Experimental Investigation of Elliptical Tube Bank Cross Flow Heat Exchanger with Inline Arrangement & 45 Angle of Attack #1 Digvijay A. Shelar, #2 N.S. Gohel, #3 R. S. Jha #1 Mechanical Engineering Department,

More information

Natural Convection Heat Transfer Augmentation from Heat Sinks using Perforated Fins: A Review

Natural Convection Heat Transfer Augmentation from Heat Sinks using Perforated Fins: A Review (JMSME) Print ISSN : 2339-9095; Online ISSN : 2393-9109; Volume 2, Number 6; April June, 2015 pp 80 84 Krishi Sanskriti Publications http://www.krishisanskriti.org/jmsme.html Natural Convection Heat Transfer

More information

Thermal Analysis of Concentric Tube Heat Exchanger Using Louvered Strip Inserts

Thermal Analysis of Concentric Tube Heat Exchanger Using Louvered Strip Inserts Thermal Analysis of Concentric Tube Heat Exchanger Using Louvered Strip Inserts Anoop P S 1, N. Sreenivasalu Reddy 2 1 PG scholar, Raja Rajarajeswari College of Engineering, Bangalore-560074, Karnataka,

More information

Low-noise fans are not a product of chance

Low-noise fans are not a product of chance Press News Quiet blowers with inner qualities Low-noise fans are not a product of chance Noise put out by machines can be annoying, especially in those areas that really require a quiet environment. For

More information

Experimental Investigation of a Heat Pump Assisted Fluidized Bed Dryer

Experimental Investigation of a Heat Pump Assisted Fluidized Bed Dryer GRD Journals- Global Research and Development Journal for Engineering Volume 2 Issue 6 May 2017 ISSN: 2455-5703 Experimental Investigation of a Heat Pump Assisted Fluidized Bed Dryer Gokul G Nair Dr. Jeoju

More information

AN EXPERIMENTAL STUDY OF A REFRIGERATING PLANT WHEN REPLACING R22 WITH HFCs REFRIGERANTS

AN EXPERIMENTAL STUDY OF A REFRIGERATING PLANT WHEN REPLACING R22 WITH HFCs REFRIGERANTS AN EXPERIMENTAL STUDY OF A REFRIGERATING PLANT WHEN REPLACING R22 WITH HFCs REFRIGERANTS V. La Rocca 1, A. Messineo 2, D. Panno 1 1 Department of Energy, University of Palermo 2 Engineering Faculty, Kore

More information

Design of Miniature Loop Heat Pipe

Design of Miniature Loop Heat Pipe Heat Transfer Asian Research, 33 (1), 2004 Design of Miniature Loop Heat Pipe C.I. Chu, 1 S.C. Wu, 2 P.L. Chen, 1 and Y.M. Chen 1 1 Department of Mechanical Engineering, National Taiwan University, Taipei,

More information

Performance Evaluation of Reversible Air Flow Drying in Circulating Dryer

Performance Evaluation of Reversible Air Flow Drying in Circulating Dryer Performance Evaluation of Reversible Air Flow Drying in Circulating Dryer Dai-Chyi Wang 1 and Yeun-Chung Lee 2 Abstract In Taiwan, rice is harvested with high moisture content (above 27%) and must be immediately

More information

International Journal of Engineering Research (IJOER) [Vol-1, Issue-3, June- 2015]

International Journal of Engineering Research (IJOER) [Vol-1, Issue-3, June- 2015] Experimental Investigation To Develop The Refrigeration System With Two Phases Condensing Ejector Along With Energy Saving Anjani Kumar 1, Kuldip Kumar 2, Ujjwal Kumar Nayak 3 123 Department of mechanical

More information

Emergency Ventilation System Design - Preliminary Report Shishir Gupta

Emergency Ventilation System Design - Preliminary Report Shishir Gupta Emergency Ventilation System Design - Preliminary Report Shishir Gupta (shishir@mechartes.com), Abstract The existing stations and tunnels of Metro Railway, Kolkata are not equipped with effective emergency

More information

THERMAL TESTING OF A 3D PRINTED NON-UNIFORM HEATSINK AGAINST STATE-OF- THE-ART FINNED GEOMETRY

THERMAL TESTING OF A 3D PRINTED NON-UNIFORM HEATSINK AGAINST STATE-OF- THE-ART FINNED GEOMETRY THERMAL TESTING OF A 3D PRINTED NON-UNIFORM HEATSINK AGAINST STATE-OF- THE-ART FINNED GEOMETRY Robert Smith, P.E., Chief Technologist FEBRUARY 13, 2016 QRP 6764 Airport Road West Jordan, UT 84081 www.qualifiedrapidproducts.com

More information

What is the correct type of fan: Axial, radial, diagonal?

What is the correct type of fan: Axial, radial, diagonal? Press News The theory and practice of small fans (1) What is the correct type of fan: Axial, radial, diagonal? Fans are as varied in their construction as they are in their applications. These "air-donors"

More information

A study of Transient Performance of A Cascade Heat Pump System

A study of Transient Performance of A Cascade Heat Pump System Available online at www.sciencedirect.com ScienceDirect Energy Procedia 79 (2015 ) 131 136 2015 International Conference on Alternative Energy in Developing Countries and Emerging Economies A study of

More information

TITLE: Improvement in Heat Transfer Rate and Dynamics of Shrouded Fanned Radiator System

TITLE: Improvement in Heat Transfer Rate and Dynamics of Shrouded Fanned Radiator System TITLE: Improvement in Heat Transfer Rate and Dynamics of Shrouded Fanned Radiator System Prof. G.L.Allampallewar 1, Divyal P. Bagul 2, Abhiraj S. Galande 3, Amol M. Rathod 4, Ketan R. Behere 5. 1 Assistant

More information

Computerized Simulation of Automotive Air-Conditioning System: A Parametric Study

Computerized Simulation of Automotive Air-Conditioning System: A Parametric Study www.ijcsi.org 787 Computerized Simulation of Automotive Air-Conditioning System: A Parametric Study Haslinda Mohamed Kamar 1, Nazri Kamsah 2 and Mohd Yusoff Senawi 3 1 Department of Thermo-Fluid, Universiti

More information

Experimental Research on Monomial Cooling Measure of Greenhouse in Summer

Experimental Research on Monomial Cooling Measure of Greenhouse in Summer Smart Grid and Renewable Energy, 2013, 4, 48-52 http://dx.doi.org/10./sgre.2013.41007 Published Online February 2013 (http://www.scirp.org/journal/sgre) Experimental Research on Monomial Cooling Measure

More information

FLIGHT UNLOADING IN ROTARY SUGAR DRYERS. P.F. BRITTON, P.A. SCHNEIDER and M.E. SHEEHAN. James Cook University

FLIGHT UNLOADING IN ROTARY SUGAR DRYERS. P.F. BRITTON, P.A. SCHNEIDER and M.E. SHEEHAN. James Cook University FLIGHT UNLOADING IN ROTARY SUGAR DRYERS By P.F. BRITTON, P.A. SCHNEIDER and M.E. SHEEHAN James Cook University Paul.Britton@jcu.edu.au, Phil.Schnieder@jcu.edu.au, Madoc.Sheehan@jcu.edu.au Keywords: Drying,

More information

DESIGN OF THE BODY FRAME OF A RAIL DETECTOR

DESIGN OF THE BODY FRAME OF A RAIL DETECTOR DESIGN OF THE BODY FRAME OF A RAIL DETECTOR Jiangang Bao North University of China Department of Mechanical Engineering, China; Email: baojiangang(a)nuc. edu. en. Abstract: Key words: According to the

More information

Project Number: P15441

Project Number: P15441 Multidisciplinary Senior Design Kate Gleason College of Engineering Rochester Institute of Technology Rochester, New York 14623 Project Number: P15441 MINI-AIR: PERSONAL COOLING DEVICE Alexander Cornell

More information

Performance Comparison of Hydronic Secondary Loop Heat Pump and Conventional Air-Source Heat Pump ABSTRACT 1. INTRODUCTION

Performance Comparison of Hydronic Secondary Loop Heat Pump and Conventional Air-Source Heat Pump ABSTRACT 1. INTRODUCTION 2597, Page 1 Performance Comparison of Hydronic Secondary Loop Heat Pump and Conventional Air-Source Heat Pump Ian H. BELL 1 *, James E. BRAUN 2 1 Bell Thermal Consultants ian.h.bell@gmail.com 2 Purdue

More information

SUNON SPECIFICATION FOR APPROVAL DESCRIPTION : DC BRUSHLESS FAN. DIMENSIONS : 120X120X25 mm M O D E L : KD1212PTS1-6A

SUNON SPECIFICATION FOR APPROVAL DESCRIPTION : DC BRUSHLESS FAN. DIMENSIONS : 120X120X25 mm M O D E L : KD1212PTS1-6A SUNON SPECIFICATION FOR APPROVAL CUSTOMER : DESCRIPTION : DC BRUSHLESS FAN DIMENSIONS : 120X120X25 mm M O D E L : KD1212PTS1-6A P/N : APPROVED NO : APPROVED BY : (AUTHORIZED) SPEC.NO D120015 DAWN. Hua

More information

Theoretical and Experimental Analysis of the Superheating in Heat Pump Compressors. * Corresponding Author ABSTRACT 1.

Theoretical and Experimental Analysis of the Superheating in Heat Pump Compressors. * Corresponding Author ABSTRACT 1. 568, Page Theoretical and Experimental Analysis of the Superheating in Heat Pump Compressors Jose N. FONSECA *, Rodrigo KREMER, Thiago DUTRA 2 EMBRACO, Research & Development Group, Joinville, Santa Catarina,

More information

Analysis of Pullout Resistance of Soil-Nailing in Lateritic Soil

Analysis of Pullout Resistance of Soil-Nailing in Lateritic Soil Analysis of Pullout Resistance of Soil-Nailing in Lateritic Soil B,L.A. Isaka 1, B.C. Madushanka 1 and N.H. Priyankara 1 1 Department of Civil and Environmental Engineering Faculty of Engineering University

More information

Experimental Study on Match for Indoor and Outdoor Heat Exchanger of Residential Airconditioner

Experimental Study on Match for Indoor and Outdoor Heat Exchanger of Residential Airconditioner Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2014 Experimental Study on Match for Indoor and Outdoor Heat Exchanger of Residential

More information

STANDARD. Customer : DC FAN. Description : Customer P/N : rev. : N/A X01. Sample issue date : DEC Quantity :

STANDARD. Customer : DC FAN. Description : Customer P/N : rev. : N/A X01. Sample issue date : DEC Quantity : Delta Electronics, Inc. No.252, Shanying Rd., Guishan Dist., TEL : 886-(0)3-3591968 Taoyuan City 333, Taiwan (R.O.C.) FAX : 886-(0)3-3591991 Specification For Reference Customer : Description : STANDARD

More information

Numerical simulation of fire and smoke transport for an old-style apartment fire

Numerical simulation of fire and smoke transport for an old-style apartment fire Copyright 2010 ICCES ICCES, vol.15, no.3, pp.103-110 Numerical simulation of fire and smoke transport for an old-style apartment fire C.S. Lin, T.C. Chen, C.C. Yu,M.E. Wu, Y.H. Tu 1 Summary Most old apartments

More information

Numerical simulation of fire and smoke transport for an old-style apartment fire

Numerical simulation of fire and smoke transport for an old-style apartment fire Copyright 2009 Tech Science Press SL, vol.1, no.3, pp.155-162, 2009 Numerical simulation of fire and smoke transport for an old-style apartment fire C.S. Lin, T.C. Chen, C.C. Yu,M.E. Wu, Y.H. Tu 1 Abstract:

More information

CFD Analysis of Co-current Spray Dryer with Swirler at Air Inlet

CFD Analysis of Co-current Spray Dryer with Swirler at Air Inlet CFD Analysis of Co-current Spray Dryer with Swirler at Air Inlet Bharath G Wadone #1, Dr. G Manavendra *2 # 1 PG Student: Dept. of Mechanical Engineering, *2 Associate Professor: Dept. of Mechanical Engineering,

More information

Performance of Geosynthetics in the Filtration of High Water Content Waste Material

Performance of Geosynthetics in the Filtration of High Water Content Waste Material INDIAN GEOTECHNICAL SOCIETY CHENNAI CHAPTER Performance of Geosynthetics in the Filtration of High Water Content Waste Material T. Arun 1 and K. Ilamparuthi 2 ABSTRACT: Filtration mould was fabricated

More information

A Novel Heat Recovery System for High Temperature and High Humidity Gas Qing Hao1, a, Meng Si2, b

A Novel Heat Recovery System for High Temperature and High Humidity Gas Qing Hao1, a, Meng Si2, b 2nd Workshop on Advanced Research and Technology in Industry Applications (WARTIA 2016) A Novel Heat Recovery System for High Temperature and High Humidity Gas Qing Hao1, a, Meng Si2, b 1 Bohai Oil Water

More information

AIRFLOW STUDY OF A SPILT-TYPE OUTDOOR UNIT SUBJECTED TO NEAR WALL EFFECT USING COMPUTATIONAL FLUID DYNAMIC (CFD) SIMULATION

AIRFLOW STUDY OF A SPILT-TYPE OUTDOOR UNIT SUBJECTED TO NEAR WALL EFFECT USING COMPUTATIONAL FLUID DYNAMIC (CFD) SIMULATION Journal of Engineering Science and Technology 8 th EURECA 2017 Special Issue August (2018) 79-91 School of Engineering, Taylor s University AIRFLOW STUDY OF A SPILT-TYPE OUTDOOR UNIT SUBJECTED TO NEAR

More information

EFFECT OF CENTRAL PILE IN INCREASING THE BEARING CAPACITY OF BORED PILE GROUPS

EFFECT OF CENTRAL PILE IN INCREASING THE BEARING CAPACITY OF BORED PILE GROUPS EFFECT OF CENTRAL PILE IN INCREASING THE BEARING CAPACITY OF BORED PILE GROUPS Mohamed M. Shahin Department of Civil Engineering, 7 th October University, Misurata,, Libya, E-mail: Mohamed_zubi@yahoo.com

More information

Experimental study of the influence of geometrical parameters on the cavitation of a small centrifugal pump

Experimental study of the influence of geometrical parameters on the cavitation of a small centrifugal pump Fluid Structure Interaction and Moving Boundary Problems 89 Experimental study of the influence of geometrical parameters on the cavitation of a small centrifugal pump A. Nemdili Laboratory LRTTFC, Department

More information

Shuzo Murakami, Shinsuke Kato, and Taeyeon Kim Institute of Industrial Science, University of Tokyo Tokyo, Japan

Shuzo Murakami, Shinsuke Kato, and Taeyeon Kim Institute of Industrial Science, University of Tokyo Tokyo, Japan INDOOR CLIMATE DESIGN BASED ON FEEDBACK CONTROL OF HVAC COUPLED SIMULATION OF CONVECTON, RADIATION, AND HVAC CONTROL FOR ATTAINING GIVEN OPERATIVE TEMPERATURE Shuzo Murakami, Shinsuke Kato, and Taeyeon

More information

FLOW AND PERFORMANCE INVESTIGATIONS OF CENTRIFUGAL BLOWERS WITH AEROFOIL BLADED IMPELLERS

FLOW AND PERFORMANCE INVESTIGATIONS OF CENTRIFUGAL BLOWERS WITH AEROFOIL BLADED IMPELLERS FLOW AND PERFORMANCE INVESTIGATIONS OF CENTRIFUGAL BLOWERS WITH AEROFOIL BLADED IMPELLERS BY JAY K. MUKHRAIYA A THESIS SUBMITTED IN FULFILMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY.

More information

SPECIFICATION FOR APPROVAL

SPECIFICATION FOR APPROVAL JARO THERMAL SPECIFICATION FOR APPROVAL Customer : Customer Part No. : Description : DC FAN JARO Model No. : JPW1202512LA1A01(E) REV.0 Sample Issue No. : Sample Issue Date : V Preliminary Specification

More information

CFD Analysis of Fire Characteristics on Subway Junction Station

CFD Analysis of Fire Characteristics on Subway Junction Station ISGSR27 First International Symposium on Geotechnical Safety & Risk Oct. 18~19, 27 Shanghai Tongji University, China CFD Analysis of Fire Characteristics on Subway Junction Station G. H. Wu, X. Han, Q.Q.

More information

An Assessment of Radiator Performance

An Assessment of Radiator Performance An Assessment of Radiator Performance By William Adams September 9, 2005 Table of contents 1. Test Equipment and Procedures...2 2. Radiator Descriptions...3 3. Performance Testing...4 a. Group 1: Single

More information

Research and Development of Residential Heat Pump

Research and Development of Residential Heat Pump Research and Development of Residential Heat Pump Midterm Report: Performance Analysis and Design Crosby Laboratory Department of Mechanical Engineering University of Maine Orono, Maine Team Members: Donald

More information

Characterization of a Heat Sink with Embedded Heat Pipe with Variable Heat Dissipating Source Placement for Power Electronics Applications

Characterization of a Heat Sink with Embedded Heat Pipe with Variable Heat Dissipating Source Placement for Power Electronics Applications Characterization of a Heat Sink with Embedded Heat Pipe with Variable Heat Dissipating Source Placement for Power Electronics Applications Neda Mansouri, Cliff Weasner and Ahmed Zaghlol Mersen Canada Toronto

More information

High Performance Diesel Fueled Cabin Heater. Abstract

High Performance Diesel Fueled Cabin Heater. Abstract High Performance Diesel Fueled Cabin Heater Tom Butcher and James Wegrzyn Energy Science and Technology Division Building 526 Upton, N.Y. 11973 Brookhaven National Laboratory Abstract Recent DOE-OHVT studies

More information

Specific Energy Consumption comparative study of Hot Air dryer and Heat Pump dryer for highland drying process Sayompon Srina

Specific Energy Consumption comparative study of Hot Air dryer and Heat Pump dryer for highland drying process Sayompon Srina Specific Energy Consumption comparative study of Hot Air dryer and Heat Pump dryer for highland drying process Sayompon Srina Department of Mechanical Engineering, Faculty of Engineering, King Mongkut

More information

The Role of Computational Fluid Dynamic and Aeroacoustic Simulations in Reducing the Noise of a Forward-Curved Blade Radial Fan

The Role of Computational Fluid Dynamic and Aeroacoustic Simulations in Reducing the Noise of a Forward-Curved Blade Radial Fan The Role of Computational Fluid Dynamic and Aeroacoustic Simulations in Reducing the Noise of a Forward-Curved Blade Radial Fan Manoochehr Darvish Bastian Tietjen Stefan Frank darvish@htw-berlin.de tietjen@htw-berlin.de

More information

Development of Bionic Air Cooler Used in High Temperature Coal Mine

Development of Bionic Air Cooler Used in High Temperature Coal Mine Advances in Natural Science Vol. 3, No. 2, 2010, pp. 206-212 www.cscanada.net ISSN 1715-7862 [PRINT] ISSN 1715-7870 [ONLINE] www.cscanada.org *The 3rd International Conference of Bionic Engineering* Development

More information

Experimental study of hybrid loop heat pipe using pump assistance for high heat flux system

Experimental study of hybrid loop heat pipe using pump assistance for high heat flux system IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Experimental study of hybrid loop heat pipe using pump assistance for high heat flux system To cite this article: Iwan Setyawan

More information

The Research of Performance Comparison of Displacement and Mixing Ventilation System in Catering Kitchen *

The Research of Performance Comparison of Displacement and Mixing Ventilation System in Catering Kitchen * Journal of Environmental Protection, 2013, 4, 638-646 http://dx.doi.org/10.4236/jep.2013.46073 Published Online June 2013 (http://www.scirp.org/journal/jep) The Research of Performance Comparison of Displacement

More information

Experimentation of Heat Pipe Used In Nano-Fluids

Experimentation of Heat Pipe Used In Nano-Fluids Experimentation of Heat Pipe Used In Nano-Fluids 1 Prashant Shinde, 2 Vinod Shinde, 3 Rajiv Talape, 4 D.N. Korade 1,2,3,4 Department of Mechanical Engineering, Sinhgad Institute of Technology & Science,

More information

Introduction to Fans. The Basics of Fan Principles and Terminology

Introduction to Fans. The Basics of Fan Principles and Terminology Introduction to Fans The Basics of Fan Principles and Terminology Airflow Principles A fan is a rotating device that creates pressure differential that results in air movement Pressure rise in a fan Downstream

More information

Research Article Analyzing the Heat Transfer Property of Heat Pipe Influenced by Integrated Cooling Apparatus

Research Article Analyzing the Heat Transfer Property of Heat Pipe Influenced by Integrated Cooling Apparatus Chinese Journal of Engineering, Article ID 409074, 10 pages http://dx.doi.org/10.1155/2014/409074 Research Article Analyzing the Heat Transfer Property of Heat Pipe Influenced by Integrated Cooling Apparatus

More information

Analysis of ventilation system for a microwave assisted drying unit

Analysis of ventilation system for a microwave assisted drying unit Analysis of ventilation system for a microwave assisted drying unit ADRIAN-GABRIEL GHIAUS 1, DANIEL POPESCU 2 and CALIN CIUFUDEAN 3 1 Thermal Engineering Department Technical University of Civil Engineering

More information

Investigation of a Novel Ceiling Panel for Heat and Moisture Control in Buildings

Investigation of a Novel Ceiling Panel for Heat and Moisture Control in Buildings Investigation of a Novel Ceiling Panel for Heat and Moisture Control in Buildings Melanie T. Fauchoux, PhD Student University of Saskatchewan http://www.engr.usask.ca/dept/mee melanie.fauchoux@usask.ca

More information

DFE T ECHNOLOGY. At Conceptronic, the design and management process for reflow soldering systems is called Dynamic Flow Engineering, or DFE.

DFE T ECHNOLOGY. At Conceptronic, the design and management process for reflow soldering systems is called Dynamic Flow Engineering, or DFE. DFE T ECHNOLOGY As components become smaller, component mixes become more diverse, and board densities continue to increase, the processes of packaging, interconnection, and assembly are challenging the

More information

Performance Study of Triple Concentric Pipe Heat Exchanger

Performance Study of Triple Concentric Pipe Heat Exchanger Performance Study of Triple Concentric Pipe Heat Exchanger #1 Pravin M. Linge, #2 A. B. Korane, #3 V. N. Kapatkar #123 Mechanical Engineering Department, Sinhgad College of Engineering, SPPU, Pune, India

More information