Thermal Design of Condenser Using Ecofriendly Refrigerants R404A-R508B for Cascade Refrigeration System
|
|
- Pearl Spencer
- 6 years ago
- Views:
Transcription
1 Thermal Design of Condenser Using Ecofriendly Refrigerants R404A-R508B for Cascade Refrigeration System A D Parekh, and P R Tailor Abstract Because of damaging effect of CFC refrigerants on stratospheric ozone layer, international agreement (Montreal Protocal) has been signed by many countries to curtailing the use of CFCs on a global scale. Here an attempt is made to design condenser for cascade refrigeration using ecofriendly refrigerant pair R404A- R508B. These refrigerants have zero ozone depletion potential and minimum global warming potential. The design results have been obtained by developing simulation program in Engineering Equation Solver (EES). The heat transfer results of two geometries have been compared at various operating conditions of cascade system. It is revealed from the results that the required heat transfer area for tube in tube type condenser is less than shell and coil type under same operating conditions. The required heat transfer area of the both types of condensers decreases as condensing temperature and evaporating temperature increases. Keywords cascade refrigeration system, condenser, design, heat transfer area, shell and coil, tube in tube I. INTRODUCTION N low temperature refrigeration application such as storage Iof frozen food, liquefaction of petroleum vapour, manufacturing of dry ice etc. where the required evaporating temperature between C and C, the cascade system is often a convenient option, in which two suitable refrigerants are chosen. As per Montreal protocols chlorofluorocarbons (CFCs) refrigerants are completely phased out due to its effect on stratospheric ozone layer. Thus, alternative refrigerants must be found to replace the CFC refrigerants. But, replacement of the alternate refrigerant may affect the performance of the system. So, in order to improve the performance, there is a need to re-design each component of the cascade refrigeration system. Also, refrigerant vapor discharged from a compressor in refrigeration system is generally cooled and condensed in a condenser via heat transfer to a secondary fluid. If the condenser does not dissipate the heat well, the discharge pressure would build up resulting in an increase in compressor power. So, the required size of condenser is large to increase the condenser effectiveness. This becomes impractical from the viewpoint of system maintenance and initial cost since A.D Parekh, Mechanical Engineering Department, S.V National Institute of Technology, Surat, Gujarat, India, adp@med.svnit.ac.in. P.R Tailor, Mechanical Engineering Department, S.V National Institute of Technology, Surat, Gujarat, India, prt@med.svnit.ac.in. more refrigerant is to be charged. Therefore, the best way to design effective condensers would be to keep the size as small as possible with special heat transfer enhancement mechanisms. For this it is important to know the flow condensation heat transfer coefficients (HTCs) of refrigerants. To investigate the overall performance of the condenser, heat transfer behaviors for refrigerant side as well as water side must be considered simultaneously. Several investigators have performed studies on heat transfer during condensation. Schlager et al. [1] investigated evaporation and condensation heat transfer and pressure drop characteristics in three horizontal 12.7 mm microfin tubes with R22. They found evaporation and condensation heat transfer coefficients in the microfin tubes were and times, respectively, larger than those in the smooth tube. Chamra et al. [2] presented R22 condensation heat transfer and pressure drop data for new microfin geometries applied to the inner surface of mm O.D. tubes. They reported that the condensation heat transfer performance for cross grooved tubes was higher than those for single-grooved tubes. They found also that a cross-grooved tube with the helix angle of 278 had the highest heat transfer performance. Dobson and Chato [3] performed an experimental study on the condensation of R12, R22, R134a, R410A and R32/125 (60/40%) in horizontal smooth tubes. They presented two correlations, which can predict the heat transfer coefficient in the stratifying flow regime and in the annular flow regime, respectively. Rennie and Raghavan [4] performed an experimental study of a double-pipe helical heat exchanger using two differently sized heat exchangers. Both parallel flow and counter flow configurations were investigated. Hot water and cold water were used as working fluids. Overall heat transfer coefficients were determined and heat transfer coefficients in the inner tube and the annulus were calculated using Wilson plots. Nusselt number obtained for the inner tube and the annulus were compared to the data published in literature. Kwon et al. [5] measured flow condensation HTCs of R22 and R410A in plain and microfin tubes at 31 0 C in the mass flux range of kgm -2 s -1 and showed that HTCs of R410A are slightly higher than those of R22 for a plain tube while those of R410A are almost same as those of R22 for a microfin tube. In the present study, two geometries of condenser are studied viz. shell and coil and tube in tube type; in which 32
2 refrigerant flows inside tube and water over tube. The objectives of the present study are to: (i) To find the heat transfer coefficients for both geometries of condensers under study, (ii) compare the thermal performances of two geometries using refrigerant pair viz. R404A/R508B and (iii) To investigate the influence of the various operating conditions on the heat transfer area of condensers. subcooling (DSC) of 4 0 C in both cycles, isentropic efficiency of compressor of 80% II. CASCADE REFRIGERATION SYSTEM A simplified sketch of cascade refrigeration system showing the main components is shown in Fig. 1. The refrigeration system comprises two separate refrigeration cycles the high temperature cycle (HTC) and low temperature cycle (LTC). Both cycles are thermally connected with each other through cascade condenser which acts as evaporator for HTC and condenser for LTC. Water acts as a secondary fluid for both types of condensers considered in the study. Fig. 2 shows the actual T-s diagrams for cascade system for R404A/R508B. Fig.2 Actual T-S plot of R404A-R508B cascade system for both cycles.resistance due to wall and fouling factor is neglected for the evaluation of heat transfer coefficient. The refrigerant mass flow rate through the low temperature cycle is given by the following equation. The energy balance across the cascade condenser allows the evaluation of the mass flow rate of refrigerant in HTC. It is specified through the following equation. (1) Where, ε cc is cascade condenser effectiveness. Heat transfer through the all condenser, evaporator and cascade condenser is given by (2) (3) Fig. 1 Schematic diagram of cascade refrigeration system III. MODELING OF THE CONDENSER To simplify the analysis, the following assumptions were considered in the simulation. 1. The changes in kinetic and potential energy of the components are negligible. 2. Heat transfer with the ambient is negligible. 3. Compression process is adiabatic but not isentropic. 4. Pressure drop on water side and connecting pipes is negligible. 5. Only single phase heat transfer occurs for secondary fluid. Design of cascade system has been carried out for evaporating temperature (T EL ) of C, condensing temperature (T CH ) of 36 0 C, condensing temperature of LTC (T CL ) of C, temperature difference in cascade condenser (DT) of C, refrigerating effect (Q evap ) of 0.5kW, degree of superheating (DSH) of 2 0 C in both cycles, degree of The overall heat transfer coefficient is defined by following equation, The log mean temperature difference for fluids flowing through the condenser is correlated by A. Shell and coil type Fig. 3 shows the shell and coil type condenser in which refrigerant flows through the coil and water from the shell side or over the coil. (4) (5) 33
3 Fig. 4 Tube in tube type condenser Fig. 3 Shell and coil type condenser The two phase heat transfer coefficient for the refrigerant side is calculated by Traviss [7] for in-tube condensation. where the liquid Reynold s and Prandl number are calculated as (8) The non dimensional parameter F 1 and F 2 are calculated by the following equations [8]. (9) Where (1/X tt ) is the Lockhart-Martinelli factor for turbulent flow is given by [7] If (6) (7) (10) Kern [7] suggested the correlation for shell side heat transfer coefficient which is given below (11) Where h w is the shell side heat transfer coefficient, d h is the equivalent diameter on the shell side and G W is the shell side mass velocity. B. Tube in tube type Fig. 4 displays the tube in tube type condenser in which refrigerant flows through the inner tube and water through the outer tube or over the inner tube. Heat transfer coefficient of refrigerant side for tube in tube type is calculated by the same procedure as for the shell and coil type condenser. Heat transfer coefficient for water side is calculated by Prandl s correlation [7], Friction factor is calculated by the following equation [7] Reynolds number is calculated as (12) (13) (14) Table I shows the condenser base data which is common for the simulation of both types of condenser considered in the present study. Based on the above mentioned mathematical model, a code has been developed in Engineering Equation Solver (EES) for the detail numerical simulation of both shell and coil and tube in tube type condensers [8]. Table II shows the physical properties of refrigerants R404A and R508B used in HTC and LTC of cascade system. TABLE I BASE DATA FOR CONDENSER Shell and coil type Outside diameter of coil Thickness of coil Shell inside diameter Tube in tube type Inner tube diameter Outer tube diameter Tube thickness 9.5 mm 0.7 mm 281 mm 9.5 mm mm 0.7 mm TABLE II PROPERTIES OF REFRIGERANTS Properties R508B R404A Molecular weight (kg/kmol) Critical temperature ( 0 C) Critical pressure (bar) Bubble point ( 0 C) IV. RESULTS AND DISCUSSION Table III compares the heat transfer area for two different geometries of condenser at specified operating condition. It is seen that heat transfer area required for tube in tube type condenser is lower than the shell and coil condenser. 34
4 \TABLE III DESIGN DATA FOR CONDENSERS Heat transfer area in m 2 for R404A-R508B cascade system Type of condenser (T EL = C, T CH = 36 0 C, T CL = C, DT = C) Shell and coil Tube in tube Fig.5 shows the effect of varying evaporating temperature on the heat transfer area of condenser keeping the other parameter constant. It is seen that when evaporating temperature decreased from C to C the required heat transfer area of condenser decreased linearly. Heat transfer area of R404A/R508B cascade system decreased by 7.53% for shell and coil type condenser and 7.53% for tube in tube type condenser. The heat transfer area for tube in tube type condenser is lower than the shell and coil at all evaporating temperature. Heat transfer area of condenser (m 2 ) R404A/R508B Shell and coil Evaporating temperature ( 0 C) Tube in tube Fig. 5 Effect of evaporating temperature on condenser heat transfer area Fig. 6 shows the effect of condensing temperature on the heat transfer area of condenser for shell and coil type and tube in tube type geometries. As the condensing temperature increases from 32 0 C to 41 0 C, heat transfer area of condenser decreased by 79%. There is significant decrease in area when temperature reduces from 32 0 C to 35 0 C but after 35 0 C the decrease in area is minimal. Heat transfer area of condenser (m 2 ) R404A/R508B Shell and coil Tube in tube Condensing temperature ( 0 C) Fig. 6 Effect of condensing temperature on condenser heat transfer area V. CONCLUSION To predict the required heat transfer area for the water cooled condenser of R404A-R508B cascade refrigeration system simulation model has been developed in Engineering equation solver for two geometries viz. tube in tube and shell and coil. It was found that tube in tube type condenser requires less heat transfer area compared to shell and coil condenser under same operating conditions. The effect of evaporating and condensing temperatures and temperature difference between cascade condenser on heat transfer area of both types of condenser viz. shell and coil and tube in tube types are studied. It is found that the required heat transfer area of the both types of condensers decreases as condensing temperature and evaporating temperature increases but increases as temperature difference in cascade condenser increases. NOMENCLATURE LTC Low temperature cycle HTC High temperature cycle DSH Degree of superheating ( 0 C) DSC Degree of subcooling ( 0 C) Q Heat duty (kw) m Mass flow rate (kg/s) h Enthalpy (kj/kg) P Pressure (bar) T Temperature ( 0 C) d Diameter (m) r Radius (m) A Area (m 2 ) G Mass flux (kg/m 2 s) υ Specific volume (m 3 /kg) c p Specific heat capacity (kj/kgk) k Thermal conductivity (kw/k) Nu Nusselt number Pr Prandl number Re Reynolds number LMTD Logarithmic mean temperature difference ( 0 C) U Overall heat transfer coefficient (kw/m 2 K) x Dryness fraction 1/X tt Lockhart-Martinelli factor h Heat transfer coefficient (kw/m 2 K) f Friction factor g Acceleration due to gravity (m/s 2 ) Greek symbols ε Effectiveness or relative roughness Subscripts L Low temperature refrigerant side H High temperature refrigerant side evap Evaporation cond Condensation cascond Cascade condenser EL Evaporation of low temperature cycle CL Condensation of low temperature cycle 35
5 EH CH 1.8 in out i o ref w cs f g h Evaporation of high temperature cycle Condensation of high temperature cycle State points Inner tube Outer tube Inside diameter or inlet Outside diameter or outlet Refrigerant side Water side or wall Cross sectional Liquid phase Gas phase Hydraulic REFERENCES [1] L. M. Schlager, M. B. Pate, A. E. Bergles, Evaporation and condensation heat transfer and pressure drop in horizontal, 12.7-mm microfin tubes with refrigerant 22, International Journal of Heat Transfer 112, 1990, pp [2] L. Chamra, R. Webb, M. Randlett, Advanced microfin tubes for condensation, Int J Heat Mass Transfer 39 (9),1996, pp [3] M. K. Dobson, J. C. Chato, Condensation in smooth horizontal tubes, J Heat Transfer 120 (1998) [4] T. J. Rennie, G. S.V. Ranghavan, Experimental studies of a double-pipe helical heat exchanger, Exp. Thermal Fluid Sci. 29, 2005, pp [5] Kwon J. T., Park S. K., Kim M. H., Enhanced effect of a horizontal microfin tube for condensation heat transfer with R22 and R410A, Enhanced Heat Transfer 7, 2000, pp [6] C. P. Arora, Refrigeration and air conditioning, 3rd edition, McGraw-Hill publication, New Delhi, [7] Sadik Kakac and Hongtan Liu, Heat exchangers: Selection, rating and thermal design, 2nd ed., CRC Press, Boca Raton, New York, [8] S. A. Klein, Engineering Equation Solver, commercial V
Thermodynamic Analysis of Cascade Refrigeration System Using R12-R13, R290-R23 and R404A-R23
Thermodynamic Analysis of Cascade Refrigeration System Using R12-R13, R290-R23 and R404A-R23 A. D. Parekh, P. R. Tailor Abstract The Montreal protocol and Kyoto protocol underlined the need of substitution
More informationHEFAT th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics Sun City, South Africa Paper number:pp1
HEFAT27 5 th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics Sun City, South Africa Paper number:pp PERFORMANCE ANALYSIS OF AIR-COOLED CONDENSER USING MICRO-FIN TUBES P.A.Patil
More informationGlobal Journal of Engineering Science and Research Management
EXPERIMENTAL AND THEORETICAL STUDY OF MINIATURE VAPOR COMPRESSION CYCLE USING MICROCHANNEL CONDENSER Issam M. Ali Aljubury*, Ahmed Q. Mohammed, Marwa S. Neama * Mechanical Eng. Dept. College of Engineering,
More informationPerformance Enhancement of Refrigeration Cycle by Employing a Heat Exchanger
Performance Enhancement of Refrigeration Cycle by Employing a Heat Exchanger Abstract Shoeb J. Inamdar 1 H.S. Farkade 2 M. Tech student. (Thermal Engineering) 1, Asst. Professor 2 Department of Mechanical
More informationNUMERICAL SIMULATION OF VAPOUR COMPRESSION REFRIGERATION SYSTEM USING REFRIGERANT R152A, R404A AND R600A
NUMERICAL SIMULATION OF VAPOUR COMPRESSION REFRIGERATION SYSTEM USING REFRIGERANT R152A, R404A AND R600A [1] Ranendra Roy, [2] Madhu Sruthi Emani, [3] Bijan Kumar Mandal [1], [2],[3] Department of Mechanical
More informationWORK STUDY ON LOW TEMPERATURE (CASCADE) REFRIGERATION SYSTEM
WORK STUDY ON LOW TEMPERATURE (CASCADE) REFRIGERATION SYSTEM Sachin Kumar 1, Vicky Ranga 2 1Assistant Professor, Department of Mechanical Engineering, Jagan Nath University Jhajjar, Haryana, India. 2Scholar.
More informationPerformance of an Improved Household Refrigerator/Freezer
Performance of an Improved Household Refrigerator/Freezer D. O. Ariyo Department of Mechanical Engineering, School of Engineering, Federal Polytechnic, Offa, Nigeria Y. L. Shuaib-Babata Department of Mechanical
More informationTheoritical Analysis For Miniature Vapor Compression Cycle Performance Using Microchannel And Finned Tube Condenser
Theoritical Analysis For Miniature Vapor Compression Cycle Performance Using Microchannel And Finned Tube Condenser Issam Mohammed Ali Ahmed Qasim Mohammed Marwa Sallah Neama Mechanical Eng. Dept Air-
More informationRole of Nano-technology for improving of thermal performances of vapour compression refrigeration system (VCRS): An Overview
International Journal of Research in Engineering and Innovation Vol-2, Issue-1 (2018), 21-28 International Journal of Research in Engineering and Innovation (IJREI) journal home page: http://www.ijrei.com
More informationNUMERICAL SIMULATION OF VAPOUR COMPRESSION REFRIGERATION SYSTEM USING REFRIGERANT R152A, R404A AND R600A
ISSN: 2250-0138 (Online) NUMERICAL SIMULATION OF VAPOUR COMPRESSION REFRIGERATION SYSTEM USING REFRIGERANT R152A, R404A AND R600A RANENDRA ROY a1, MADHU SRUTHI EMANI b AND BIJAN KUMAR MANDAL c abc Department
More informationExperimental 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 informationComparative Study of Transcritical CO 2 Cycle with and Without Suction Line Heat Exchanger at High Ambienttemperature
International Journal Of Computational Engineering Research (ijceronlinecom) Vol 3 Issue 3 Comparative Study of Transcritical CO 2 Cycle with and Without Suction Line Heat Exchanger at High Ambienttemperature
More informationEnhancement of COP in Vapour Compression Refrigeration System
Enhancement of COP in Vapour Compression Refrigeration System M. Krishna Prasanna #1 M.E student, Heat Transfer studies in Energy Systems Department of Mechanical Engg., Andhra University Visakhapatnam-530003,
More informationIn the name of God. Jami Institute of Jami - Mehdi Rasti
In the name of God 1 Heat Transfer Jami Institute of Technology Heat Exchangers part 2 Mehdi Rasti 2 The Counter-Flow Heat Exchanger In contrast to the parallel-flow exchanger, this configuration provides
More informationijcrr Vol 04 issue 07 Category: Research Received on:06/02/12 Revised on:17/02/12 Accepted on:02/03/12
EXPERIMENTAL ANALYSIS OF THE EFFECT OF FIN GEOMETRY ON HEAT TRANSFER RATE THROUGH THE REFRIGERATOR CONDENSER ijcrr Vol 04 issue 07 Category: Research Received on:06/02/12 Revised on:17/02/12 Accepted on:02/03/12
More information[Vali*, 5(2): February, 2016] ISSN: (I2OR), Publication Impact Factor: 3.785
IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY PERFORMANCE ANALYSIS OF VCR SYSTEM WITH VARYING THE DIAMETERS OF HELICAL CONDENSER COIL BY USING R-134A REFRIGERANT R.Hussain
More informationADVANCES in NATURAL and APPLIED SCIENCES
ADVANCES in NATURAL and APPLIED SCIENCES ISSN: 1995-0772 Published BY AENSI Publication EISSN: 1998-1090 http://www.aensiweb.com/anas 2016 Special10(7): pages 112-122 Open Access Journal The Effect Of
More informationExperimental Analysis of Performance Characteristics of Mini Channel Heat Exchangers
Experimental Analysis of Performance Characteristics of Mini Channel Heat Exchangers Ashraf A 1, Mohammed Shan N 2, Thoufeeq Azad 3, Bibin S4, Arun S 5 1-4 Students, 5 Assistant Professor Department of
More informationSubscripts 1-4 States of the given system Comp Compressor Cond Condenser E Evaporator vol Volumetric G Gas L Liquid
Simulation Analysis of Compression Refrigeration Cycle with Different Refrigerants P.Thangavel, Dr.P.Somasundaram, T.Sivakumar, C.Selva Kumar, G.Vetriselvan Abstract --- In this analysis, the performance
More informationEXPERIMENTAL EVALUATION OF CONDENSATION HEAT TRANSFER COEFFICIENT OF R-417A IN HORIZONTAL TUBES
112 Military Technical College Kobry El-Kobbah, Cairo, Egypt. 17 th International Conference on Applied Mechanics and Mechanical Engineering. EXPERIMENTAL EVALUATION OF CONDENSATION HEAT TRANSFER COEFFICIENT
More informationAnalysis 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 informationVolume 2, Issue 1 (2014) ISSN International Journal of Advance Research and Innovation
Methods for Improving First and Second Law Efficiencies of Vapour Compression Refrigeration Systems Using Flash-Intercooler with Ecofriendly Refrigerants Kapil Chopra *, V. Sahni, R. S. Mishra Department
More informationSIMULATION OF POTENTIAL REFRIGERANTS FOR RETROFIT REPLACEMENT
SIMULATION OF POTENTIAL REFRIGERANTS FOR RETROFIT REPLACEMENT R. Prapainop 1* and K. O. Suen 2 1 Department of Mechanical Engineering, Kasetsart University, Si Racha Campus, Chonburi, Thailand 2 Department
More information2. HEAT EXCHANGERS MESA
1. INTRODUCTION Multiport minichannel and microchannel aluminium tubes are becoming more popular as components in heat exchangers. These heat exchangers are used in various industrial applications and
More informationComparative Exergy Analysis of Vapor Compression Refrigeration System Using Alternative Refrigerants
Comparative Exergy Analysis of Vapor Compression Refrigeration System Using Alternative Refrigerants Gulshan Sachdeva, Vaibhav Jain Abstract In present paper, the performance of various alternative refrigerants
More informationPerformance 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 informationDesign, Manufacturing of Chilled Water System for Process Cooling Application
IJSTE - International Journal of Science Technology & Engineering Volume 2 Issue 11 May 2016 ISSN (online): 2349-784X Design, Manufacturing of Chilled Water System for Process Cooling Application Prof.
More information4th International Conference on Sensors, Measurement and Intelligent Materials (ICSMIM 2015)
4th International Conference on Sensors, Measurement and Intelligent Materials (ICSMIM 2015) Multi-stage Series Heat Pump Drying System with Dehumidification Simulation and Experiment Verification Chao
More informationPerformance Enhancement of Refrigeration Cycle by Employing a Heat Exchanger
Performance Enhancement of Refrigeration Cycle by Employing a Heat Exchanger Shoeb Inamdar 1, H. S. Farkade 2 P.G. Student, Department of Mechanical Engineering, Govt. College of Engg. Amravati. Maharashtra,
More informationAvailable online at ScienceDirect. Energy Procedia 109 (2017 ) 56 63
Available online at www.sciencedirect.com ScienceDirect Energy Procedia 109 (2017 ) 56 63 International Conference on Recent Advancement in Air Conditioning and Refrigeration, RAAR 2016, 10-12 November
More informationExperimental study on heat transfer characteristics of horizontal concentric tube using twisted wire brush inserts
International Journal of Current Engineering and Technology E-ISSN 2277 416, P-ISSN 2347 5161 216 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijcet Research Article Experimental
More informationFUNDAMENTAL BASIS AND IMPLEMENTATION OF SHELL AND TUBE HEAT EXCHANGER PROJECT DESIGN: EVAPORATOR STUDY
FUNDAMENTAL BASIS AND IMPLEMENTATION OF SHELL AND TUBE HEAT EXCHANGER PROJECT DESIGN: EVAPORATOR STUDY A.S. Dalkilic O. Acikgoz S. Tapan S. Wongwises Heat and Heat and Thermodynamics Thermodynamics Division,
More informationNumerical Studies On The Performance Of Methanol Based Air To Air Heat Pipe Heat Exchanger
International Journal of ChemTech Research CODEN( USA) IJCRGG ISSN 0974-4290 Vol.5, No.2, pp 925-934, April-June 2013 ICGSEE-2013[14th 16th March 2013] International Conference on Global Scenario in Environment
More informationExperimental Investigation of a Brazed Chevron Type Plate Heat Exchanger
IJSTE - International Journal of Science Technology & Engineering Volume 1 Issue 12 June 2015 ISSN (online): 2349-784X Experimental Investigation of a Brazed Chevron Type Plate Heat Exchanger N. Manigandan
More informationASSESSMENT OF R430A REFRIGERANT AS A POSSIBLE SUBSTITUTE TO R134A REFRIGERANT IN LARGE CAPACITY FREEZER
University of Maiduguri Faculty of Engineering Seminar Series Volume 6, december 5 ASSESSMENT OF REFRIGERANT AS A POSSIBLE SUBSTITUTE TO R34A REFRIGERANT IN LARGE CAPACITY FREEZER S. Shodiya*, M.B. Oumarou
More informationVolume 4, Issue 1 (2016) ISSN International Journal of Advance Research and Innovation
Methods for Improving Thermodynamic Energy and Exergy Performance of Vapour Compression Refrigeration Systems using Thirteen Ecofriendly Refrigerants in Primary Circuit and TIO 2 Nano Particles Mixed with
More informationη second law = Second law efficiency
EXERGY ANALYSIS OF VAPOUR COMPRESSION REFRIGERATION CYCLE BASED AUTOMOTIVE AIR CONDITIONER USING ECO FRIENDLY REFRIGERANTS Vijender Singh Saini 1, Balvinder 2, Pardeep Kumar 3 1 M.Tech Scholar, 2,3 Assistant
More informationEVALUATION OF REFRIGERANT R290 AS A REPLACEMENT TO R22
EVALUATION OF REFRIGERANT R290 AS A REPLACEMENT TO R22 Ameya P. Shrivastava 1, Choudhari Chandrakishor S. 2 1,2 Mechanical Department, AISSMS College of Engineering, Pune 411001, (India) ABSTRACT HCFC
More informationPerformance Analysis of Li-Br Water Refrigeration System with Double Coil Anti-Swirl Shell and Coil Heat Exchangers
e-issn 2455 1392 Volume 2 Issue 5, May 2016 pp. 108-116 Scientific Journal Impact Factor : 3.468 http://www.ijcter.com Performance Analysis of Li-Br Water Refrigeration System with Double Coil Anti-Swirl
More informationCompression 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 informationInternational Research Journal of Engineering and Technology (IRJET) e-issn: Volume: 04 Issue: 05 May p-issn:
Comparison of Second Law Efficiency and Exergy Analysis of Refrigerants R-12, R-22, R-407C Influenced by Evaporator Temperature for Vapour Compression Refrigeration System Md Ozair Arshad Guest Faculty,
More informationDesign and Development of Water Cooled Condenser for Domestic Refrigerator
Design and Development of Water Cooled Condenser for Domestic Refrigerator Anil S. Patil Research PG Student, GF s Godavari College of Engineering, Jalgaon Dr. Atul A Patil Assot. Prof. GF s Godavari College
More informationThermodynamic analysis of air cycle refrigeration system for Chinese train air conditioning
Available online at www.sciencedirect.com Systems Engineering Procedia () 6 International Conference on Risk and Engineering Management (REM) Thermodynamic analysis of air cycle refrigeration system for
More informationPerformance of a Transcritical CO 2 Heat Pump for Simultaneous Water Cooling and Heating
Performance of a Transcritical CO Heat Pump for Simultaneous Water Cooling and Heating J. Sarkar, Souvik Bhattacharyya, and M. Ramgopal Abstract This paper presents the experimental as well as the simulated
More informationKeywords: Climate change; ozone depletion; Montreal protocol; eco-friendly refrigerant; hydrocarbon refrigerant; performance analysis.
Comparative performance analysis of Refrigeration Test RIG for R-12 & R-134a Parmesh 1, Mr. Amit Sharma 2 1 M.Tech. Scholar, Department of Mechanical Engineering, 2 Assistant Professor, Department of Mechanical
More informationEFFECT OF PAG OIL CIRCULATION RATE ON THE HEAT TRANSFER PERFORMANCE OF AIR-COOLED HEAT EXCHANGER IN CARBON DIOXIDE HEAT PUMP SYSTEM
- 1 - EFFECT OF PAG OIL CIRCULATION RATE ON THE HEAT TRANSFER PERFORMANCE OF AIR-COOLED HEAT EXCHANGER IN CARBON DIOXIDE HEAT PUMP SYSTEM Shun YOSHIOKA, Hyunyoung KIM, Kazushige KASAI, Daikin Industries,
More informationFABRICATION OF REFRIGERANT FLOW RATE WITH SPIRALLY COILED CAPILLARY TUBE
FABRICATION OF REFRIGERANT FLOW RATE WITH SPIRALLY COILED CAPILLARY TUBE PRESENTED BY J.SARAVANA PERUMAL 1 Saravananjsp005@gmail.com D.SATHEESH 2 Satheeshd123@gmail.com Contact no: 9789080381 DEPARTMENT
More informationInvestigation of Evaporator Performance with and without Liquid Overfeeding
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2016 Investigation of Evaporator Performance with and without Liquid Overfeeding
More informationEnergy and Exergy Analysis of an Ejector-Absorption Refrigeration Cycle with Using NH3-H2O as the Working Fluids
Energy and Exergy Analysis of an Ejector-Absorption Refrigeration Cycle with Using NH3-HO as the Working Fluids A. Habibzadeh 1, *, S. Jafarmadar 1, M. M. Rashidi, S. S. Rezaei 3, A. Aghagoli 3 1 Department
More informationInternational Journal of Research in Engineering and Innovation Vol-1, Issue-5 (2017), 68-72
International Journal of Research in Engineering and Innovation Vol-1, Issue-5 (2017), 68-72 International Journal of Research in Engineering and Innovation (IJREI) journal home page: http://www.ijrei.com
More informationPerformance Comparison of Ejector Expansion Refrigeration Cycle with Throttled Expansion Cycle Using R-170 as Refrigerant
International Journal of Scientific and Research Publications, Volume 4, Issue 7, July 2014 1 Performance Comparison of Ejector Expansion Refrigeration Cycle with Throttled Expansion Cycle Using R-170
More informationInternational Journal Of Core Engineering & Management (IJCEM) Volume 2, Issue 9, December 2015
EXERGY ANALYSIS OF VAPOUR COMPRESSION REFRIGERATION CYCLE- A REVIEW Pradhumn Tiwari 1, Prakash Pandey 2 1 Pradhumn Tiwari Research Scholar, Maulana Azad Nation Institute of Technology, Bhopal, M.P, India
More informationHeat exchangers are devices that facilitate the exchange of heat between
cen58933_ch3.qxd 9/9/2002 9:57 AM Page 667 HEAT EXCHANGERS CHAPTER 3 Heat exchangers are devices that facilitate the exchange of heat between two fluids that are at different temperatures while keeping
More informationGandhinagar Institute of Technology Mechanical Engineering (Thermal Engineering) Semester II. Design of Heat Exchange Equipments [ ]
Experiment 1 Study of fundamentals of Fluid Flow and Heat Transfer associated with Heat Exchangers Review questions (1) Significance of dimensionless numbers. (2) Define overall heat transfer coefficient.
More informationImplementation and testing of a model for the calculation of equilibrium between components of a refrigeration installation
Implementation and testing of a model for the calculation of equilibrium between components of a refrigeration installation Marco Alexandre Onofre Dias This paper presents a model that was implemented
More informationCFD 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 informationHeat Transfer Analysis of Vapor Compression System Using Nano Cuo-R134a
2011 International Conference on Advanced Materials Engineering IPCSIT vol.15 (2011) (2011) IACSIT Press, Singapore Heat Transfer Analysis of Vapor Compression System Using Nano Cuo-R134a Eed Abdel-Hafez
More informationPerformance Evaluation of Eco- Friendly Alternate Refrigerants for VCRS
Performance Evaluation of Eco- Friendly Alternate Refrigerants for VCRS Lalit Narayan, Abhishek Arya 2,2 M. Tech. Scholar, Associate Professor,,2 Scope College of Engineering, Bhopal, India Abstract: The
More informationExperimental Study on Performance Parameters for Refrigerants R22, R410a and R404a at Various Air Outlet Temperatures
Experimental Study on Performance Parameters for Refrigerants, R41a and R44a at Various Air Outlet Temperatures P. Nagaraju P. G. Student Sanketika Institute of Technology and Management Ch. Kiran Kumar
More informationVolume 2, Issue 4 (2014) ISSN International Journal of Advance Research and Innovation
Use of Hydrocarbons in Low Temperature Circuit in Terms of First Law and Second Law of Four Stage Cascade Refrigeration of Semen Preservation R.S. Mishra Department of Mechanical Engineering, Delhi Technological
More informationChapter 10. Refrigeration and Heat Pump Systems
Chapter 10 Refrigeration and Heat Pump Systems Learning Outcomes Demonstrate understanding of basic vaporcompression refrigeration and heat pump systems. Develop and analyze thermodynamic models of vapor-compression
More informationEffect of Louvered Strips on Heat Transfer in a Concentric Pipe Heat Exchanger
Effect of Louvered Strips on Heat Transfer in a Concentric Pipe Heat Exchanger Somsak Pethkool 1, Smith Eiamsa-ard, Artit Ridluan and Pongjet Promvonge 1,* 1 Department of Mechanical Engineering, Faculty
More informationPERFORMANCE OF DEEP FREEZER BY USING HYDROCARBON BLENDS AS REFRIGERANTS
Int. J. Chem. Sci.: 14(S2), 2016, 665-674 ISSN 0972-768X www.sadgurupublications.com PERFORMANCE OF DEEP FREEZER BY USING HYDROCARBON BLENDS AS REFRIGERANTS J. THAVAMANI *, MARRIPUDAGALA KOMALI, SHAIK
More information"COP Enhancement Of Domestic Refrigerator By Sub cooling And Superheating Using Shell &Tube Type Heat Exchanger"
"COP Enhancement Of Domestic Refrigerator By Sub cooling And Superheating Using Shell &Tube Type Heat Exchanger" 1 Prof.Gaffar G.Momin, 2 Sagar B. Tupe, 2 Swapnil A. Parate 2 Omkar G. Yewale 2 Aakash P.
More informationDesign, Development & Testing of Double Pipe Heat Exchanger With Heat Transfer Enhancement Liners
Volume 2, Issue 1, January 2017 ISSN (online): 2456-0006 International Journal of Science Technology Management and Research Available online at: Design, Development & Testing of Double Pipe Heat Exchanger
More informationSolar air heater duct having triangular protrusions As roughness elements on absorber plate
Solar air heater duct having triangular protrusions As roughness elements on absorber plate A. Nagaraju 1, B. Chnadramohan Reddy 2 1,2 Department of Mechanical Engineering, Jawaharlal Nehru Technological
More informationFeasibility Study of Condensation Heat Exchanger with Helical Tubes for a Passive Auxiliary Feedwater System
Feasibility Study of Condensation Heat Exchanger with Helical Tubes for a Passive Auxiliary Feedwater System Kwanghee Seo 1) and Taewan Kim 2)* 1) KEPCO Engineering & Construction Company. INC., 269 Hyeoksin-ro,
More informationPressure drop analysis of evaporator using refrigerants R-22, R-404A and R-407C
drop analysis of evaporator using refrigerants R-22, R-404A and R-407C #1 Pallavi Sawkar, #2 Dr. Pradeep Patil #12 Department of Mechanical Engineering, JSPM s JSCOE, Savitribai Phule Pune University,
More informationKeywords: Triple tube heat exchanger (TTHE), hot water, cold water, CFD simulation.
International Engineering Research Journal Design and CFD analysis of concentric triple tube heat exchanger with circular fins Girishkumar Patil, Prof.S.K.Bhosale and Prof.V.S.Shinde ϯ ϯ Abstract The triple
More informationControl Method Of Circulating Refrigerant Amount For Heat Pump System
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2014 Control Method Of Circulating Refrigerant Amount For Heat Pump System Jin
More informationDesign Based Comparative Study of Several Condensers Komal B. Dabhi 1, Prof. S. B. Thakore 2 1 Chemical Engg. Dept., L. D. College of Engineering, Ahmedabad 380015 2 Chemical Engg. Dept., L. D. College
More informationFalling Film Heat Exchangers for Solar Water Heaters
Y.C., G.L. Morrison and M. Behnia School of Mechanical and Manufacturing Engineering University of New South Wales Sydney 2052 AUSTRALIA E-mail: yens@student.unsw.edu.au Abstract The characteristics of
More informationGSJ: VOLUME 6, ISSUE 6, JUNE GSJ: Volume 6, Issue 6, June 2018, Online: ISSN
GSJ: VOLUME 6, ISSUE 6, JUNE 2018 189 GSJ: Volume 6, Issue 6, June 2018, Online: ISSN 2320-9186 ANALYSIS OF A VAPOUR ABSORPTION REFRIGERATION CYCLE POWERED BY A SOLAR SYSTEM Taiwo O. Oni Department of
More informationAssessment of LPG as a possible alternative to R-12 in domestic refrigerators
Energy Conversion and Management 44 (2003) 381 388 www.elsevier.com/locate/enconman Assessment of LPG as a possible alternative to R-12 in domestic refrigerators Bilal A. Akash a, *, Salem A. Said b a
More informationAn Experiment of Heat Exchanger Produces Hot Water Using Waste Heat Recovery from Air Conditioning
ISBN 978-93-84468-94-1 International Conference on Education, Business and Management (ICEBM-2017) Bali (Indonesia) Jan. 8-9, 2017 An Experiment of Heat Exchanger Produces Hot Water Using Waste Heat Recovery
More informationExperimental Research On Gas Injection High Temperature Heat Pump With An Economizer
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2014 Experimental Research On Gas Injection High Temperature Heat Pump With
More informationIJISET - International Journal of Innovative Science, Engineering & Technology, Vol. 2 Issue 12, December
Performance Analysis of Eco-Friendly HC Mixture (R290/R600a) Refrigerant as an Alternative to in a Vapour Compression Refrigeration System for Sub-cooling using Heat Exchanger at Condenser Outlet and Diffuser
More informationA Comparison Between Refrigerants Used In Air Conditioning
A Comparison Between Refrigerants Used In Air Conditioning Derya Özkan, Özden Agra and Özlem Çetin University of Yildiz Technical University, Turkey Corresponding email: tumer@yildiz.edu.tr SUMMARY It
More informationEXPERIMENTAL INVESTIGATION OF WATER COOLER SYSTEM BY USING ECO-FRIENDLY REFRIGERANT (R-134a)
EXPERIMENTAL INVESTIGATION OF WATER COOLER SYSTEM BY USING ECO-FRIENDLY REFRIGERANT (R-134a) Abstract- With the recent government regulations, of banning the ozone depleting substances and Kyoto protocol
More informationPOTENTIAL OF NON - AZEOTROPIC REFRIGERANT MIXTURE AS WORKING REFRIGERANT IN HOT WATER HEAT PUMPS. FJ Smit and JP Meyer
POTENTIAL OF NON - AZEOTROPIC REFRIGERANT MIXTURE AS WORKING REFRIGERANT IN HOT WATER HEAT PUMPS FJ Smit and JP Meyer Research Group for Heating and Cooling Technology, Laboratory for Energy, PO Box 524,
More informationEffect of Heat Exchanger Configuration on the Performance of Joule-Thomson Refrigerators
Effect of Heat Exchanger Configuration on the Performance of Joule-Thomson Refrigerators Yong-Ju Hong, Seong-Je Park Korea Institute of Machinery & Materials Daejeon, 35-6, Korea Young-Don Choi Department
More informationEffect of Operating Parameters on the Performance of Direct Evaporative Cooler
International Journal of Thermal Technologies E-ISSN 2277 4114 2015 INPRESSCO, All Rights Reserved Available at http://inpressco.com/category/ijtt/ Research Article Effect of Operating Parameters on the
More informationANALYSING THE EFFECTIVENESS OF THE HEAT EXCHANGER BY INCREASING OVERALL HEAT TRANSFER COEFFICIENT
ANALYSING THE EFFECTIVENESS OF THE HEAT EXCHANGER BY INCREASING OVERALL HEAT TRANSFER COEFFICIENT Mazhar Mumbaiwala 1, Rahul Panjwani 2, Rishikesh Shulav 3, Shashwat Budholia 4, Anshu Kumar 5 1,2,3,4UG
More informationExperimental Analysis Of Vapour Compression Refrigeration System With Superheating By Using R-134a, R-12, R-717 Refrigerant
Experimental Analysis Of Vapour Compression Refrigeration System With Superheating By Using R-134a, R-12, R-717 Refrigerant Satish parmar 1, Ravindra Randa 2 1M.TECH. Scholar, Department Of Mechanical
More informationA Thermal Assessment for Vertical Helical Immersion Coil Evaporator in a Water Chiller
American Journal of Energy and Power Engineering 2015; 2(5): 62-73 Published online September 10, 2015 (http://www.aascit.org/journal/ajepe) ISSN: 2375-3897 A Thermal Assessment for Vertical Helical Immersion
More informationVolume 3, Issue 4 (2015) ISSN International Journal of Advance Research and Innovation
Thermodynamic Comparison Using HFO-1234yf and HFO-1234ze in the Refrigeration s and in Applications R. S. Mishra Department of Mechanical Engineering, Delhi Technological University, Delhi, India Article
More informationPERFORMANCE ANALYSIS AND CALCULATION OF DIFFERENT PARAMETERS OF CONDENSER USING ANSYS FLUENT SOFTWARE
PERFORMANCE ANALYSIS AND CALCULATION OF DIFFERENT PARAMETERS OF CONDENSER USING ANSYS FLUENT SOFTWARE Ram Mohan Gupta 1, Dr. Shatyendra Singh 2 Mr. Simant Srivastava 3 1 Mechanical Engineering, Uttarakhand
More informationDESIGN AND ANALYSIS OF PIPE HEAT EXANGERS WITH INSIDE FINS
DESIGN AND ANALYSIS OF PIPE HEAT EXANGERS WITH INSIDE FINS Helan Jacob.J 1,Chandra Mohan.B 2,Palanisamy.S 3 1, P.G. Scholars, Department ofthermal Engineering, Oxford Engineering college,pratiyur, Trichy.
More informationExperimental investigation of Hybrid Nanofluid on wickless heat pipe heat exchanger thermal performance
Experimental investigation of Hybrid Nanofluid on wickless heat pipe heat exchanger thermal performance #1 Jaydev S. Bade, #2 Dr. Nitin U. Korde 1 Department of Mechanical Engineering, Savitribai Phule
More informationA COMPARATIVE STUDY FOR RETROFITTING OF R-12 VAPOUR COMPRESSION REFRIGERATION SYSTEM BY ECO- FRIENDLY REFRIGERANTS R-134A, R-413A, R-423A
,, IJAET International Journal of Application of Engineering and Technology ISSN: 33 Vol No. A COMPARATIVE STUDY FOR RETROFITTING OF R VAPOUR COMPRESSION REFRIGERATION SYSTEM BY ECO FRIENDLY REFRIGERANTS
More informationPerformance Analysis of Electronic Expansion Valve in 1 TR Window Air Conditioner using Various Refrigerants
Performance Analysis of Electronic Expansion Valve in 1 TR Window Air Conditioner using Various Refrigerants CHENNUCHETTY CHINNARAJ * Associate Professor in Mechanical Engineering, Government College of
More informationInternational Journal of Research in Engineering and Innovation Vol-2, Issue-2 (2018),
International Journal of Research in Engineering and Innovation Vol-2, Issue-2 (2018), 183-190 International Journal of Research in Engineering and Innovation (IJREI) journal home page: http://www.ijrei.com
More informationPerformance analysis of a vapour compression refrigeration system with a diffuser for theeco-friendly refrigerants R-134a, R-600a and R-152a
International Journal of Research in Engineering and Science (IJRES) ISSN (Online): 2320-9364, ISSN (Print): 2320-9356 Volume 4 Issue 6 ǁ June. 2016 ǁ PP. 52-57 Performance analysis of a vapour compression
More informationA Generalized Correlation for Pressure Drop of Refrigerant R-134a through Helical Capillary Tubes
ISSN 2395-1621 A Generalized Correlation for Pressure Drop of Refrigerant R-134a through Helical Capillary Tubes #1 N. Dhekale, #2 Dr. P. A. Patil 1 amardhekale@gmail.com #12 Research Laboratory, Department
More informationNumerical Study on Improvement of COP of Vapour Compression Refrigeration System
Numerical Study on Improvement of COP of Vapour Compression Refrigeration System Sanath Kumar K H 1, Arun Kumara K S 2, Nissar Ahmed 3 Assistant Professor, Department of Mechanical Engineering, VVIT, Bangalore,
More informationCOMPARATIVE ANALYSIS OF SINGLE AND DOUBLE EFFECT LiBr-WATER ABSORPTION SYSTEM
COMPARATIVE ANALYSIS OF SINGLE AND DOUBLE EFFECT LiBr-WATER ABSORPTION SYSTEM Suhail Ahmad Khan Department of Mechanical Engineering, Aligarh Muslim University, Aligarh (India) ABSTRACT Energy analysis
More informationOyelami S., Bolaji B. O.
International Journal of Scientific & Engineering Research, Volume 6, Issue 6, June-2015 1158 Experimental Investigation of the Performance of Liquefied Petroleum Gas (LPG) Refrigerant in A Vapour Compression
More informationHeat Exchanger Joule-Thomson Transient Cryogenic Refrigeration. Iranian Journal of Chemical Engineering Vol. 14, No. 3 (Summer 2017), IAChE
Iranian Journal of Chemical Engineering Vol. 14, No. 3 (Summer 2017), IAChE Transient Thermal Study of Recuperative Tube in Tube Heat Exchanger Operating in Refrigeration System Using Experimental Test
More informationScientific Principals and Analytical Model. Charcoal Cooler. Lisa Crofoot MECH 425, Queens University
Scientific Principals and Analytical Model Charcoal Cooler Lisa Crofoot MECH 425, Queens University 1.0 Scientific Principles Evaporative cooling is based on the principle that water requires heat energy
More informationPaper No. : 04 Paper Title : Unit Operations in Food processing Module 11 : Principles of Refrigeration
Paper No. : 04 Paper Title : Unit Operations in Food processing Module 11 : Principles of Refrigeration 11.1 Introduction Preservation of foods is a vital processing step in food processing. There are
More information