Preliminary Exploration: Fault Diagnosis of the Circulating-water Heat Exchangers based on Sound Sensor and Non-destructive Testing Technique
|
|
- Shannon Charles
- 6 years ago
- Views:
Transcription
1 2013 8th International Conference on Communications and Networking in China (CHINACOM) Preliminary Exploration: Fault Diagnosis of the Circulating-water Heat Exchangers based on Sound Sensor and Non-destructive Testing Technique Xufeng Zhu, Lei Shu, Haiming Zhang, Anxiong Zheng, Guangjie Han Guangdong Petrochemical Equipment Fault Diagnosis Key Laboratory Guangdong University of Petrochemical Technology, China Department of Information & Communication Engineering, Hohai University and Changzhou Key Laboratory of Sensor Networks and Environmental Sensing, Changzhou, China {xufeng.zhu, lei.shu, haiming.zhang, Abstract A heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another, which is very important to petrochemical enterprises. Since heat system often uses industrial circulating water as cooling water, the heat exchanger is prone to scale, clogging and leakage, resulting in substandard products and even serious economic losses. Therefore, how to monitor and find out heat exchangers scaling, clogging and leaking timely is a very import subject for petrochemical enterprises. When fluid flow through narrow pipes within heat exchangers, it will cause the pipes to vibrate and produce sound. If there exists congestion, the heat exchanger would produce a different sound from that in normal. Thus, in this paper, we explore the probability of using sound sensors for large heat exchanger fault diagnosis in petrochemical enterprises. Our extensive experiments show that it is very difficult to use sound detection technology for fault diagnosis of large circulating water heat exchangers because environmental noise is too large. It is necessary to continue to explore and improve the fault diagnosis of large circulating water heat exchanger using Non-destructive testing technology of sound sensor. Keywords Circulating water heat exchanger, Leak, Sound sensor, Fault diagnosis I. INTRODUCTION Circulating water heat exchanger, which is indispensable to realize the heat exchanger and transfer. It is widely used in many industries such as petroleum, chemical industry, nuclear energy, especially in the petroleum refining and chemical processing device. The working situation of circulating water heat exchanger directly affect the smooth running of the entire unit, for safety, stability, long running, which plays an important role. To save costs, the industrial circulating water is often used as cooling water in the Maoming ethylene factory. However, the quality of circulating water is unqualified and the circulating water heat exchanger s pipeline does not belong to the special material. It easily leads to the heat exchanger pipes severe blockage, corrosion and leakage. As shown in Fig. 1, it results in significant security risks and economic losses. At presented, domestic and international monitoring methods for heat exchanger mainly based on regular testing. The scope of testing is relatively fixed. For example, Maoming ethylene factory detects the faults of heat exchanger by the Fig. 1. (a) The inside situation of a heat exchanger in Maoming ethylene factory change of some physical quantities between both ends of exchangers, such as temperature, pressure and ph. These methods have the following disadvantages: The main disadvantage is artificial reading, whose accuracy is not high and which consumes a large amount of manpower. It cannot monitor the operation of the heat exchanger in real time, which causes a serious lag time, consequently affecting the effective failure detection of the heat exchanger. Therefore, to solve this problem, we should study a new approach to monitor the heat exchanger and detect the faults. When the fluid flowing through the narrow pipe of the heat exchanger, it will cause pipes to vibrate and produce sound. With further investigation in the process, we found that sometimes we can hear the internal noise of the heat exchanger when the heat exchanger is running, e.g., the acoustic resonance. Heat exchanger would produce abnormal noise 1 when a fault occurs. Based on the research in [1], which is proposed for the boiler heat exchanger pipes leak detection and location. It is found that for a heat exchanger, the sound of blockage or leakage is different from the normal pipelines. Therefore, we put forward the fault diagnosis of the circulating water heat exchanger based on sound sensor and Non-destructive testing 2 (NDT) technique In general terms, non-destructive testing (NDT) is the inspection or measurement of a material without damage to the item. Technically defined, non-destructive testing is the use of an interrogative medium to non-invasively determine the integrity of a material, component or structure. (b) IEEE
2 In this paper, we study and analyze the sound signal of the heat exchanger in running. The noise from external environment has a greater impact on the collected sound signal, so we first consider filtering the noise. However, any kind of filtering can generate signal distortion in varying degrees. Instead of simply filtering the noise, we try to improve the experimental equipment. Then, the sound signal with higher signal-to-noise ratio can be obtained. The research work has certain contributions: The sound signal of heat exchanger is different when it is in different conditions. Therefore, real-time monitoring the heat exchanger sound signal in its run-time can efficiently detect the faults of the heat exchanger, e.g., blockage and leakage. The novel method is simple: it is a breakthrough to sensor networks applications which uses a large number of low-cost sound sensors to detect the heat exchanger in running. Attempted to combine theory and practice: according to researches on sound signals of running heat exchangers at home and abroad, we find that it is feasible that sound detection can be used in the field of fault diagnosis of heat exchangers. Fault diagnosis of the circulating water heat exchangers based on sound sensor and NDT technique, as a new detection technology, there would be better prospects. The rest of the paper is organized as follows: The second section describes the related work. The section III presents the problem statement. The section IV is the introduction of the experimental apparatus. The section V introduces the heat exchanger sound signal acquisition experimental and data processing. Part VI is the analysis of the experimental data and draw conclusions. Part VII is future working. II. RELATED WORK At present, NDT technology at home and abroad mainly include magnetic particle, penetrate, ultrasound technology (UT) [2], radiographic inspection [3], acoustic pulse detection, magnetic memory method [4] and potential analysis [5] on the heat exchanger. The detection of the heat exchanger in the installation site, it is usage of NDT instruments that is suitable for on-site testing of portable equipment [6]. However, in practical, most of the enterprises still collect and analyze part of the main parameters of the heat exchanger (E.g, water flow rate, inlet temperature, outlet temperature, steam temperature, etc.), and based on these problems to determine the status of the heat exchanger. What is more, these parameters are extracted by the instruments automatically. For the online monitoring of the heat exchanger, researcher s had put forward some methods, e.g., Fluorimetry and Potentiometry. These methods have large limitations (E.g., they are only applicable when the heat exchanger leaks.). If the defaults were not detected and cleared in time, it is easy to result in the production of unqualified products. To find the fatigue crack or welding defects, as for using sound as a way of detection, the focus of this study is mainly to utilize ultrasound to carry out spot checks or a comprehensive inspection of the heat exchanger. Moreover, the ultrasonic instrument has been widely used, due to its small size, lightweight, and harmlessness to the human body. Existing methods of ultrasonic detection include Time of Flight Diffraction (TOFD), Phased Arrays and Holographic Imaging etc. For example, the idea proposed by Dr. Noam Amir said that acoustic pulse reflectometry can be used to fully inspect the heat transfer tubes and identify contamination, leakage, corrosion, and other key drawbacks [7]. The detection technology of tubes is not just limited to one way. In many studies, researchers have tried to put a variety of methods together. For example, ultrasonic and eddy current NDT techniques for composite [8]. At present, the heat exchanger sound online testing has gradually aroused researchers attention. And the research on the heat exchanger sound signal has already had a solid foundation of theory [9-24]. Therefore, we try to use the fault diagnosis of the circulating water heat exchanger based on sound sensor and NDT technique. III. PROBLEM STATEMENT From the section I and section II, we know that the heat exchanger can generate sound when it is running. In this paper, we try to evaluate a new method to detect faults of heat exchangers: sound sensor fault diagnosis of the heat exchanger when it is running. The first sub-problem of this paper is to verify that environment influence is so large that the method of heat exchanger s sound detection is difficult to realize. As the fluid state in the heat exchanger s different positions is different, we need to detect sound signals in different positions. The second sub-problem of this paper is to detect sound signals in different positions. We design an experiment to research and discuss this issue after we went to the Maoming Petrochemical Company field trips. Related issues will be discussed in detail in the following sections. IV. THE DESIGN OF SOUND SIGNAL COLLECTION SYSTEM When using sound sensor to collect sound signal of heat exchangers, environmental noises have an impact on the results. Because it is very easy to couple environmental noises. Therefore, in this paper, we try to reduce noise by improving the hardware. To reduce environmental noise, we make enclosures according to the research on material and enclosure designs [25-27]. The sound sensor with noise enclosure is shown in Fig. 2. In Fig. 2 (a), 1 is damping material which can diminish the influence of reasonance and coincidence effect. 3 uses the hollow sound insulation sealing strip to avoid rigid contact between enclosures and sound source equipments, which can reduce the influence of outside noise and improve the signalto-noise ratio greatly. Meanwhile, the noise enclosure is easy to operate, install and remove. 489
3 Fig. 6. sensor Fig. 2. The sound sensor with noise enclosure The location of sound Fig. 7. The layout of sound-nodes of the different position in the same heat exchanger sound signal s files are named Normal 1, Normal 2, Disabled respectively. 2. Step B: collecting the heat exchanger outlet piping s sound signal and the ambient noise. Do the experimental steps A and B at the same time, which to ensure the simultaneity of the collected data. The step B collected sound signal s files are named Duct, Noise respectively. Fig. 3. Schematic diagram of sound signal collection system The circulating water heat exchanger is large. The damage positions varied. To collect sound signals of different positions for comparison, we have designed a multipoint synchronous sound signal acquisition device. The device is shown in Fig. 3. V. 3. Step C: collecting the sound signal at different positions in heat exchanger, the node position is arranged as shown in Fig. 7. Collecting the sound signal of the heat exchanger close to the shell inlet and outlet water and middle position. The sampling frequency, sampling time, sampling precision and collect numbers are the same as step A, B. Collected sound signal files are named Left (Fig. 7, left sound-node), Middle, Right respectively. 4. Step D: coursing of the experiment, we want to ensure that the sound nodes appress the surface of the heat exchanger and no one is interference. S OUND DETECTION OF THE C IRCULATING - WATER H EAT E XCHANGER EXPERIMENT The ambient noise intensity is very high in the industrial site. The measured data of the noise around the circulating water heat exchanger in the Maoming petrochemical company is collected higher than 90 db. 5. Step E: analysising and processing of the sound signals we collected. In Maoming petrochemical company, we collect sound signals in the same positions of two running heat exchangers and one stopping running simultaneously. We also collected ambient noise and sound signals of the heat exchanger inlet pipe. As shown in Fig Nodes layout diagram is shown in Fig 6. he purpose is to detect whether environmental noise have a significant impact on heat exchanger s sound monitoring. We analyze the collected data, with Matlab by time domain analysis and frequency-domain analysis of sound signals as shown in the Fig. 8. B. Experimental data processing VI. T HE ANALYSIS OF EXPERIMENTAL DATA AND CONCLUSION A. The analysis of experimental data A. Experimental procedure 1. Step A: collecting the sound signal in the same model of two using and one stopping heat exchangers in the middle. The sampling frequency is 44100Hz, the bit rate is 32bit. Every heat exchangers collected the date 30 seconds. The collected According to the experimental results of the section V, By the Fig.8, we can be seen: 1. From the spectrum we can know that the sound signal of almost all concentrated in the low frequency band, while at high frequencies in 20000Hz-30000Hz and 55000Hz. 2. The stopping using heat exchanger only connect one end of the circulating water pipeline. Near the end of the pipeline centrifugal pump is not connected. The sound signal is mainly concentrated in the low frequency band by the power spectrum of the figure. As shown in Fig. 8(c). Fig. 4. Maoming petrochemical company Fig. 5. Test of the heat exchanger The spectrum at the different frequency segment mainly concentrated around 20000Hz, comparison of the spectrum and time domain analysis of the two heat exchangers using in normal. The Fig like the Fig. 8(a), Fig. 8(b).
4 (a) Normal 1 (b) Normal 2 (c) Disabled (d) Duct (e) Noise (f) Left Fig. 8. (g) Middle Time domain analysis and frequency-domain analysis of sound signals (h) Right 4. The contrast setting group with the frequency spectrum of the normal use of the heat exchanger ( As shown in Fig. 8(a), Fig. 8(b), Fig. 8(e).), we can see the trend is almost the same and the amplitude is slightly different. 5. In contrast with the data of the three groups in figures shown as Fig. 8(f), Fig. 8(g), Fig. 8(h), we can see the left and right one s value is close. And the middle group has great difference in high frequency band. It is shown that the sound 491
5 signal in different places of the heat exchanger is different, which is estimated with the external environment. B. Conclusion 1. In this paper, it can be found that when sound sensors is used to detect the heat exchanger, it is affected heavily by surrounding noise, which mainly result from the fact that heat exchanger pipe is connected with a centrifugal pump, and the sound signal emitted by the centrifugal pump when it is working can be transmitted through the pipeline to the heat exchanger. 2. The sound signal of heat exchangers at the different positions is different. This estimate is related to the external environment or changes of internal temperature and the heat exchanger fluid. Because the influence of temperature is different on the sound propagation, impact strength and heat transfer fluid flow tube. 3. The collected sound signal is mainly in the low frequency band, and the trend of the spectrum is similar, which shows that the influence of the external environment plays a leading role, according to the technology, voice monitoring, using in this study to the heat exchanger to the fault diagnosis. VII. FUTURE WORKING We had proved the feasibility of the detecting heat exchanger of the sound in a certain extent by collecting the analysis theory of sound heat exchanger in operation during this study. However, the Maoming petrochemical field experiment found that environmental factors have a great interference of sound detection. The sound detection s failure of the heat exchanger also need continuous improvement. Here, we propose some suggestions. A. To improve the experiment s device and the signal s noise ratio. B. To achieve the sound signal demising, eliminating the influence of the external environment. C. The heat exchanger should be detected by a long time, in which to improve the technology of sound detection during the exploration continuously. ACKNOWLEDGMENT Lei Shu is the corresponding author. This work is supported by the Guangdong University of Petrochemical Technology s Internal Project No. 2012RC0106, the Applied Basic Research Program of Changzhou Science and Technology Bureau, NO. CJ and the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry. REFERENCES [1] G. Jiang, L. An, K. Yang, Numerical Study of Directionality Patterns for Acoustic Radiation From A Leak Source on A Heat-exchanger Cylinder in Boilers, Proceedings of the CSEE, vol. 22, no. 6, pp , [2] S. Zhu, D. Lu, L. Hu, C. Wu, J. Shao, Application of Time of Flight Diffraction Technique on the Site Welding Pressure Vessels, Petrochemical Equipment, vol. 41, no. 6, pp , [3] W. Zhang, G. Shen, Nondestructive Testing of Pressure Vessels: Nondestructive Testing Technique for Heat Exchangers, NDT, [4] J. Lin, C. Lin, F. Lin, H. Sha, A New Non-destructive Testing Techaique Based on Magneticmemory Effect, NDT, vol. 22, no. 7, pp , [5] L. Liu, J. Dang, R. Ren, A Research of the Monitoring System for the Leakage of Heat Exchanger, Instrumentation Customer, vol. 16, no. 2, [6] H. Chu, Pressure Vessels NDT: Nondestructive Testing Spherical Tanks, Hunan agricultural Machinery, vol. 38, no. 5, [7] N. Amir, The Next Generation of Heat Exchanger Inspection: Using Acoustic Pulse Reflectometry, [8] Q. Zhang, Technique of Complex NDT Based on Ultrasonic and Eddy Current Testing, South China University of Technology Guangzhou, China, [9] D. Firth, M. A. Heckl, Sound Propagation in A Steam Generator: Experimental and Theoretical Results Nuclear Energy, vol. 327, pp , [10] G. Jiang, L. An, K. Yang, et al, A Modal Analysis of Acoustic Resonance for Cylindrical Shells of Heat-exchanger in Boilers, Proceedings of the CSEE, vol. 23, no. 8, pp , [11] G. Jiang, et al, Theoretical analysis for sound wave scattering by parallel cylindrical tubes in boilers, Acta Acustica, vol. 25, no. 2, pp , [12] G. Jiang, L. An, J. Tian, G. Shen, Modal Study of Multiple Scattering Field on Tubes Surface in a Heat-Exchangers Row, Proceedings of the CSEE, vol. 26, no. 9, [13] Bo. Dai, H. Liu, The Discussion of Sound-Vibration of Tubular Heatexchanger, Contemporary Chemical Industry, vol. 30, no. 1, pp , [14] G. S. Jiang, et al, Directionality features for acoustic radiation from anon-separable source on a rigid cylinder, Proceedings of the 5thInternational Conference on Theoretical and Computational Acoustics(ICTCA), vol. 5, pp , 2001, Beijing, China. [15] D. Ma, Noise control, in Beijing: Science Press, [16] G. Jiang, L. An, G. Shen, K. Liu, Numerical Study on the Sound Wave Propagation Through Many Rows of Heat-exchanger Tubes in Boilers, Proceedings of the CSEE, vol. 20, no. 7, pp , [17] G. Jiang, L. An, Y. Lu, et al, Numerical Study on the Sound Wave Propagation Through A Row of Heat-exchanger Tubes in Boilers, Proceedings of the CSEE, vol. 26, no. 12, pp , [18] G. Jiang, L. An, J. Tian, et al, Numerical Study on the Sound Wave Propagation Through Two Rows of Heat-exchanger Tubes in Boilers, Proceedings of the CSEE, vol. 26, no. 17, pp , [19] L. S. Mulbolland, M. A. Heckl, Multi-directional Sound Wave Propagation Through A Tube Bundle, Journal of Sound and Vibration, vol. 176, no. 3, pp , [20] R. P. Cocker, R. E. Challis, A Study of Ultrasonic Wave Propagation Through Parallel Arrays of Immersed Tubes, Journal of Sound and Vibration, vol. 193, no. 5, pp , [21] J. O. Vasseur, P. A. Deymier, B. Chenni,et al, Experimental and Theoretical Evidence for the Existence of Absolute Acoustic Band Gaps in Two-dimensional Solid Phononic Crystals, Physical Review Letters, vol. 86, no. 14, pp , [22] P. Mclver, Water-wave Propagation Through an Infinite Array of Cylindrical Structures, Journal of Fluid Mechanics, vol. 424, no. 1, pp , [23] J. V. Sanchez-Perez, Sound Attenuation by a Two-dimensional Array of Rigid Cylinders, Physical Review Letters, vol. 80, no. 24, pp , [24] M. A. Hwckl, Sound Propagation in Bundles of Periodically Arranged Cylindrical Tubes, Acustica, vol. 77, no. 1, pp , [25] L. Fu, Elimination Methods of Intensive Noise in Industrial Field for On-line Sonic Detection, China Jiliang University, [26] J. Fang, Z. Jiang, Analysis on Noise Collecting of Roots Blower and Design for Noise Insulator, Compressor,Blower and Fan Technology, no. 1, pp , [27] C. Duan, G. Cui, P. Liu, Present Research and Prospect of Porous Absorption Materials, Metallic Functional Materials, vol. 18, no. 1, pp ,
Application of Golay Coded Pulse Compression in Air-coupled Ultrasonic Testing of Flexible Package Seal Defect
2016 3 rd International Conference on Engineering Technology and Application (ICETA 2016) ISBN: 978-1-60595-383-0 Application of Golay Coded Pulse Compression in Air-coupled Ultrasonic Testing of Flexible
More informationLong-range Ultrasonic Non-destructive Testing of Fuel Tanks
ECNDT 2006 - Fr.2.2.4 Long-range Ultrasonic Non-destructive Testing of Fuel Tanks Liudas MAŽEIKA, Rymantas KAŽYS, Renaldas RAIŠUTIS, Andriejus DEMČENKO, Reimondas ŠLITERIS Ultrasound Institute, Kaunas
More informationDesign of Humidity Monitoring System Based on Virtual Instrument
Available online at www.sciencedirect.com Procedia Engineering 24 (2011) 759 763 2011 International Conference on Advances in Engineering Design of Humidity Monitoring System Based on Virtual Instrument
More informationDesign of the Fiber-optic Fence Warning System with Distributed Video Real-Time Display Function Qiang-yi YI and Zheng-hong YU *
2016 International Conference on Artificial Intelligence: Techniques and Applications (AITA 2016) ISBN: 978-1-60595-389-2 Design of the Fiber-optic Fence Warning System with Distributed Video Real-Time
More informationA design of automatic boiler intelligent alert system based on the wireless AD hoc network
5th International Conference on Computer Sciences and Automation Engineering (ICCSAE 2015) A design of automatic boiler intelligent alert system based on the wireless AD hoc network Shiping Li1, a Maodong
More informationDevelopment 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 informationDetection system for optic characteristics of automobile glasses
Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research, 2014, 6(6):1277-1282 Research Article ISSN : 0975-7384 CODEN(USA) : JCPRC5 Detection system for optic characteristics of
More informationA Fresnel Reflection-Based Optical Fiber Sensor System for Remote Refractive Index Measurement Using an OTDR
PHOTONIC SENSORS / Vol. 4, No. 1, 2014: 48 52 A Fresnel Reflection-Based Optical Fiber Sensor System for Remote Refractive Index Measurement Using an OTDR Jianying YUAN, Chunliu ZHAO *, Manping YE, Juan
More informationDesign of Gear Defect Detection System Based on Machine Vision
IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Design of Gear Defect Detection System Based on Machine Vision To cite this article: Yu Wang et al 208 IOP Conf. Ser.: Earth Environ.
More informationInvestigation, Analysis and Solution of Higher Noise of Heat Pump Water Heater
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2016 Investigation, Analysis and Solution of Higher Noise of Heat Pump Water
More informationKeywords: ECM, suction tool, auxiliary electrode, current density, machining characteristics
Realization of Current Area Restriction in ECM Process by Electrolyte Suction Tool with Auxiliary Electrode Wataru Natsu 1, a *, Guixian Liu 1,2,b, and Saori Hizume 1,c 1 Tokyo University of Agriculture
More informationHealthy 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 informationResearch on the Monitor and Control System of Granary Temperature and Humidity Based on ARM
Research on the Monitor and Control System of Granary Temperature and Humidity Based on ARM Liu Yang 1, Xinrong Cheng 2, Zhijie Jiang 3, and Zhijun Ren 1 1 Engineering College, China Agricultural University,
More informationInternational 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 informationAustralian Journal of Basic and Applied Sciences. Leak Detection in MDPE Gas Pipeline using Dual-Tree Complex Wavelet Transform
AENSI Journals Australian Journal of Basic and Applied Sciences ISSN:1991-8178 Journal home page: www.ajbasweb.com Leak Detection in MDPE Gas Pipeline using Dual-Tree Complex Wavelet Transform Nurul Fatiehah
More informationLaboratory study of the effects of green roof systems on noise reduction at street levels for diffracted sound
Laboratory study of the effects of green roof systems on noise reduction at street levels for diffracted sound Hongseok Yang 1), Minsung Choi 2), Jian Kang 3) 1) School of Architecture, University of Sheffield,
More informationExperimental Investigate on the Performance of High Temperature Heat Pump Using Scroll Compressor
Experimental Investigate on the Performance of High Temperature Heat Pump Using Scroll Compressor Mingyue Huang a, Xiangfei Liang a,b *, Rong Zhuang a a Gree Electric Appliances, Inc.of Zhuhai,Zhuhai 519070,China
More informationNon-destructive inspection method for concrete elements in tunnel linings using laser remote sensing
Non-destructive inspection method for concrete elements in tunnel linings using laser remote sensing Norikazu MISAKI 1), Kenichi KONDO 1), Yasuhiko SAKAMOTO 1), Yoshinori SHIMADA 2), Oleg KOTYAEV 2), Masahiro
More informationA Design Method Based on Inherent Testability of Remote Control and Monitoring System for Marine Main Engine
5th International Conference on Advanced Engineering Materials and Technology (AEMT 2015) A Design Method Based on Inherent Testability of Remote Control and Monitoring System for Marine Main Engine Xuedong
More informationThe design of the human body infrared thermometer
The design of the human body infrared thermometer Chenjie Zhang Changchun University of Science and Technology, Changchun 130022, China Abstract In order to overcome the main shortcoming of the traditional
More informationRemote Monitoring of Offshore Structures using Acoustic Emission.
11th European Conference on Non-Destructive Testing (ECNDT 2014), October 6-10, 2014, Prague, Czech Republic Remote Monitoring of Offshore Structures using Acoustic Emission. More Info at Open Access Database
More informationOptical Techniques for Industrial Inspection
Optical Techniques for Industrial Inspection P. Cielo National Research Council of Canada Industrial Materials Research Institute Boucherville, Quebec, Canada ACADEMIC PRESS, INC. Harcourt Brace Jovanovich,
More informationEXPERIMENTAL 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 informationPerformance of Shell and Tube Heat Exchanger under Varied Operating Conditions
Performance of Shell and Tube Heat Exchanger under Varied Operating Conditions N. Prabhu Kishore 1, N. Alekhya 2, J. Ugandhar 3 Asst. Professor, Department of Mechanical Engineering, MLR Institute of Technology,
More informationFREQUENCY SHIFTING SIGNAL DETECTION AND ANALYSIS OF BOILER TUBE LEAKS
18 TH INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS FREQUENCY SHIFTING SIGNAL DETECTION AND ANALYSIS OF BOILER TUBE LEAKS GJ. Jung 1 *, YS. Cho 1, YC. Kim 1, SH.Baek 1, JH. Sung 2 1 KEPRI, Korea Electric
More informationSIMULATION ANALYSIS ON THE FRESH AIR HANDLING UNIT WITH LIQUID DESICCANT TOTAL HEAT RECOVERY
SIMULATION ANALYSIS ON THE FRESH AIR HANDLING UNIT WITH LIQUID DESICCANT TOTAL HEAT RECOVERY Xiaoyun Xie, Yidan Tang, Xiaoqin Yi, Shuanqiang Liu,Yi Jiang Department of Building Science and Technology,
More informationHeat 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 informationHunting Phenomena Of Automotive Air Conditioning Systems With Variable Displacement Compressor
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 22 Hunting Phenomena Of Automotive Air Conditioning Systems With Variable Displacement
More informationOpen Access Operation Modes and Energy Analysis of a New Ice-Storage Air- Conditioning System
Send Orders for Reprints to reprints@benthamscience.ae The Open Electrical & Electronic Engineering Journal, 215, 9, 7-14 7 Open Access Operation Modes and Energy Analysis of a New Ice-Storage Air- Conditioning
More informationDevelopment and Application of the Rail-type Inspection Robot used in Substation Rooms
Development and Application of the Rail-type Inspection Robot used in Substation Rooms Jiang Keqiang*, Sun Zhizhou, Liu Yongcheng, Sui Jichao, Fu Chongguang, Li Yunchang Shandong Luneng Intelligence Technology
More informationExperiment Study in Optical Fiber Temperature Monitoring
Experiment Study in Optical Fiber Temperature Monitoring HE Jun, DONG Hui-juan, YANG Kan, ZHANG Guang-yu (School of Mechatronics Engineering, Harbin Institute of Technology, Harbin150001, China) Abstract:
More informationRADIATION BLOCKAGE EFFECTS BY WATER CURTAIN
, Volume 6, Number 4, p.248-254, 04 RADIATION BLOCKAGE EFFECTS BY WATER CURTAIN C.L. Choi Department of Building Services Engineering, The Hong Kong Polytechnic University, Hong Kong, China ABSTRACT Water
More informationResearch on Decision Tree Application in Data of Fire Alarm Receipt and Disposal
Research Journal of Applied Sciences, Engineering and Technology 5(22): 5217-5222, 2013 ISSN: 2040-7459; e-issn: 2040-7467 Maxwell Scientific Organization, 2013 Submitted: October 09, 2012 Accepted: December
More informationThe 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 informationExperimental study of fan coil assisting radiant floor heating system
Journal of Scientific Research and Studies Vol. 4(12), pp. 394-401, December, 2017 ISSN 2375-8791 Copyright 2017 Author(s) retain the copyright of this article http://www.modernrespub.org/jsrs/index.htm
More informationExperimental 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 informationRelated Problems in Ultrasonic Detection of Porcelain Insulator
17th World Conference on Nondestructive Testing, 25-28 Oct 2008, Shanghai, China Related Problems in Ultrasonic Detection of Porcelain Insulator Li CHEN, Jia-Qing WANG Anhui Electric Power Research Institute
More informationHeat Transfer in Evacuated Tubular Solar Collectors
Heat Transfer in Evacuated Tubular Solar Collectors Graham L. Morrison, Indra Budihardjo and Masud Behnia School of Mechanical and Manufacturing Engineering University of New South Wales Sydney 2052 Australia
More informationDesign of Microwave Anti-theft Alarm Based on Microcontroller
Design of Microwave Anti-theft Alarm Based on Microcontroller Hanhong Tan Guangdong University of Science & Technology,Dongguan,523083, China Abstract At present, most households use safety gates and install
More informationDesign of Classroom Intelligent Lighting System Based on SCM. Jiale Zheng1, a
6th International Conference on Machinery, Materials, Environment, Biotechnology and Computer (MMEBC 2016) Design of Classroom Intelligent Lighting System Based on SCM Jiale Zheng1, a 1 North China Electric
More informationSmoldering Propagation Characteristics of Flexible Polyurethane Foam under Different Air Flow Rates
Smoldering Propagation Characteristics of Flexible Polyurethane Foam under Different Air Flow Rates Zhou Y., Fei Y.*, Hu S. Q. Nanjing Tech University, College of Fire Safety Science and Engineering &
More informationStructure Improvement and Flow Field Analysis of Condenser in Freeze drying Equipment
6th International Conference on Mechatronics, Computer and Education Informationization (MCEI 2016) Structure Improvement and Flow Field Analysis of Condenser in Freeze drying Equipment Runling Peng1,
More informationA Study on Cooling Rate with Blade and Sound Fire Extinguisher
International Journal of Engineering Research and Technology. ISSN 0974-3154 Volume 11, Number 12 (2018), pp. 1969-1976 International Research Publication House http://www.irphouse.com A Study on Cooling
More informationA Novel Approach for the Thermal Management. of PC Power Supply
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
More informationAn experimental study of the impact of tunnel suppression on tunnel ventilation
An experimental study of the impact of tunnel suppression on tunnel ventilation Yoon J. Ko and George Hadjisophocleous Civil and Environmental Engineering, Carleton University 1125 Colonel By Drive, Ottawa,
More informationfor Precision Planter System Based on MSP430-CT171 Lianming Xia, Xiangyou Wang*, Duanyang Geng, Qingfeng Zhang
Performance Monitoring System for Precision Planter Based on MSP430-CT171 Lianming Xia, Xiangyou Wang*, Duanyang Geng, Qingfeng Zhang School of Agricultural and Food Engineering, Shandong University of
More informationREVIEW ON CONDENSER AIR LEAK TEST
Volume 119 No. 16 2018, 3197-3205 ISSN: 1314-3395 (on-line version) url: http://www.acadpubl.eu/hub/ http://www.acadpubl.eu/hub/ REVIEW ON CONDENSER AIR LEAK TEST 1 Neethu Sathyan M, 2 Dr.Golda Dilip,
More informationResearch on Landscape Design of Urban Park
2012 4th International Conference on Computer Modeling and Simulation (ICCMS 2012) IPCSIT vol.22 (2012) (2012) IACSIT Press, Singapore Research on Landscape Design of Urban Park Sirong Liu + Hubei University
More informationA Numerical study of the Fire-extinguishing Performance of Water Mist in an Opening Machinery Space
Available online at www.sciencedirect.com Procedia Engineering 31 (2012) 734 738 International Conference on Advances in Computational Modeling and Simulation A Numerical study of the Fire-extinguishing
More informationStudy on an environmental simulation system of low/high temperature. for great space
International Conference on Advances in Energy and Environmental Science (ICAEES 2015) Study on an environmental simulation system of low/high temperature for great space Weike Pang1, a*, Tianping Liu1,
More informationA 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 informationAnalysis of Triangle Heating Technique using High Frequency Induction Heating in Forming Process of Steel Plate
Analysis of Triangle Heating Technique using High Frequency Induction Heating in Forming Process of Steel Plate KEYWORDS: Steel-plate forming, Induction heating, Triangle heating, Transverse shrinkage,
More informationExperimental Study on Performance of Double pipe Length on Instantaneous Air Source Heat Pump Water Heater. Yin Shaoyou 1, a
International Symposium on Energy Science and Chemical Engineering (ISESCE 2015) Experimental Study on Performance of Double pipe Length on Instantaneous Air Source Heat Pump Water Heater Yin Shaoyou 1,
More informationRLDS - Remote LEAK DETECTION SYSTEM
RLDS - Remote LEAK DETECTION SYSTEM Asel-Tech has spent considerable time and resources over the past 8 years to improve our technology, to the point where it is unparalleled in reliability and performance
More informationExperimental Study of Initial Process of Frost on Heat Exchanger Surface of Refrigerated Transport Vehicle
Experimental Study of Initial Process of Frost on Heat Exchanger Surface of Refrigerated Transport Vehicle Zhengda Fang 1, a, Peng Xia 1, b School of Shanghai University of Engineering Science, Shanghai
More informationinter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering August 2000, Nice, FRANCE
Copyright SFA - InterNoise 2000 1 inter.noise 2000 The 29th International Congress and Exhibition on Noise Control Engineering 27-30 August 2000, Nice, FRANCE I-INCE Classification: 7.9 SOUND QUALITY AND
More information1066. A self-adaptive alarm method for tool condition monitoring based on Parzen window estimation
1066. A self-adaptive alarm method for tool condition monitoring based on Parzen window estimation Xiaoguang Chen, Guanghua Xu 1066. A SELF-ADAPTIVE ALARM METHOD FOR TOOL CONDITION MONITORING BASED ON
More informationStudy in Step by Step Electric Energy Meter Connection Detection Method
TELKOMNIKA Indonesian Journal of Electrical Engineering Vol. 14, No. 1, April 2015, pp. 90 ~ 96 DOI: 10.11591/telkomnika.v14i1.7662 90 Study in Step by Step Electric Energy Meter Connection Detection Method
More informationA Novel Online Cleaning System for Shell and Tube Oil Heat Exchanger
Advances in Engineering Research (AER), volume 130 5th International Conference on Frontiers of Manufacturing Science and Measuring Technology (FMSMT 2017) A Novel Online Cleaning System for Shell and
More informationTemperature and Humidity Monitoring System for Embedded Computer
International Symposium on Computers & Informatics (ISCI 2015) Temperature and Humidity Monitoring System for Embedded Computer Zhu Lei1, Wang Yongjie1, Li Siwei2, Liu Heng1 1No. 63981 Unit of PLA, Wuhan,
More informationScienceDirect. Development progress of critical equipment in the CSNS cryogenic hydrogen system
Available online at www.sciencedirect.com ScienceDirect Physics Procedia 67 (2015 ) 233 238 25th International Cryogenic Engineering Conference and the International Cryogenic Materials Conference in 2014,
More informationCFD 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 informationDETECTION AND LOCALIZATION OF MICRO AND MULTIPHASE LEAKAGES USING DISTRIBUTED FIBER OPTIC SENSING
DETECTION AND LOCALIZATION OF MICRO AND MULTIPHASE LEAKAGES USING DISTRIBUTED FIBER OPTIC SENSING ABSTRACT Distributed fiber optic sensing offers the ability to measure temperatures and strain at thousands
More informationAdsorption refrigeration system using waste heat
Adsorption refrigeration system using waste heat 1 RISHI SREEKUMAR, 2 SANJEEV SINGH, 3 HIMANSHU SHEKHAR, 4 RAUSHAN KUMAR, 5 Dr. R. S. BINDU 1,2,3,4 BE Students, 5 Professor Mechanical Engineering Department
More informationAn Experimental Study on Evacuated Tube Solar Collector for Heating of Air in India Avadhesh Yadav, V.K. Bajpai
Vol:5, No:7, 211 An Experimental Study on Evacuated Tube Solar Collector for Heating of Air in India Avadhesh Yadav, V.K. Bajpai International Science Index, Mechanical and Mechatronics Engineering Vol:5,
More informationThe Low-Temperature Radiant Floor Heating System Design and Experimental Study on its Thermal Comfort
International Journal of Research in Engineering and Science (IJRES) ISSN (Online): -9364, ISSN (Print): -9356 Volume 4 Issue 1 ǁ January. 16 ǁ PP.56-61 The Low-Temperature Radiant Floor Heating System
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 informationExperimental Study of Dual Heater Slider Touchdown Detectability
Applied Mechanics and Materials Online: 2013-01-25 ISSN: 1662-7482, Vols. 284-287, pp 468-472 doi:10.4028/www.scientific.net/amm.284-287.468 2013 Trans Tech Publications, Switzerland Experimental Study
More informationEnhancement of COP using Nanoadditives in Domestic Refrigerator
ISSN 2395-1621 Enhancement of COP using Nanoadditives in Domestic Refrigerator #1 Mr.Sajjan Kawade, #2 Prof P.T.Kharat 1 sajjankawade@gmail.com 2 pradip5872@gmail.com #1 P.G. Student, Mechanical Engineering
More informationExperimental Study on Crawl-Space Heating with Thermal Storage using Heat Pump
Experimental Study on Crawl-Space Heating with Thermal Storage using Heat Pump Koji Fujita, Graduate Student, Graduate School of Science and Technology, Kobe University; 039d892n@stu.kobe-u.ac.jp Atsushi
More informationThe design of automatic remote monitoring system for the temperature and humidity based on GPRS Hui ZHANG 1, a, Honghua WANG 2,a
Applied Mechanics and Materials Submitted: 2014-06-06 ISSN: 1662-7482, Vols. 599-601, pp 1102-1105 Accepted: 2014-06-09 doi:10.4028/www.scientific.net/amm.599-601.1102 Online: 2014-08-11 2014 Trans Tech
More informationSmoke and Fire Detection
International Journal of Scientific and Research Publications, Volume 4, Issue 7, July 2014 1 Smoke and Fire Detection Dr. (Mrs.) Saylee Gharge *, Sumeet Birla **, Sachin Pandey **, Rishi Dargad **, Rahul
More informationResults of Recent DOE Research on Development of Cable Condition Monitoring and Aging Management Technologies
Results of Recent DOE Research on Development of Cable Condition Monitoring and Aging Management Technologies C.J. Campbell, J.B. McConkey, H.M. Hashemian, C.D. Sexton, D.S. Cummins Analysis and Measurement
More informationHeat transfer enhancement in an air process heater using semi-circular hollow baffles
Available online at www.sciencedirect.com Procedia Engineering 56 ( 2013 ) 357 362 5 th BSME International Conference on Thermal Engineering Heat transfer enhancement in an air process heater using semi-circular
More informationA 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 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 informationDesign and Research of the Commercial Digital VRV Multi-Connected Units With Sub-Cooled Ice Storage System
Purdue University Purdue e-pubs International Refrigeration and Air Conditioning Conference School of Mechanical Engineering 2006 Design and Research of the Commercial Digital VRV Multi-Connected Units
More informationDesign of Cold Light Source System for Medical LED Endoscope
Design of Cold Light Source System for Medical LED Endoscope Guangqiu Chen, Ruiqing Mu School of Electronic and Information Engineering, Changchun University of Science and Technology, Changchun, 130022,
More informationGOLAY COMPLEMENTARY CODES, DOUBLE PULSE REPETITION FREQUENCY TRANSMISSION I. TROTS, A. NOWICKI, M. LEWANDOWSKI J. LITNIEWSKI, W.
ARCHIVES OF ACOUSTICS 31, 4 (Supplement), 35 40 (2006) GOLAY COMPLEMENTARY CODES, DOUBLE PULSE REPETITION FREQUENCY TRANSMISSION I. TROTS, A. NOWICKI, M. LEWANDOWSKI J. LITNIEWSKI, W. SECOMSKI Institute
More informationConstruction of Wireless Fire Alarm System Based on ZigBee Technology
Available online at www.sciencedirect.com Procedia Engineering 11 (2011) 308 313 The 5 th Conference on Performance-based Fire and Fire Protection Engineering Construction of Wireless Fire Alarm System
More informationDesign of Unmanned Monitoring and Automatic Monitoring System
Journal of Polymer Science and Engineering (2018) Original Research Article Design of Unmanned Monitoring and Automatic Monitoring System Xudong Ding,Hongyan Jiang,Weihua Zhou School of Mechanical Engineering
More informationVariable far infrared radiation (VFIR) technique for cubic carrot drying
International Journal of Renewable Energy, Vol. 7, No. 2, July - December 2012 Variable far infrared radiation (VFIR) technique for cubic carrot drying Sirinuch Chindaruksa a *, Pisit Maneechot b, Seishu
More informationAnalysis of the Design of an HVAC System in a Public Building
Analysis of the Design of an HVAC System in a Public Building Zongyi Shao Hongbing Chen Ping Wei Key Lab of HVAC Hebei Engineering and Beijing Institute of Civil Engineering and Technical College Architecture
More informationExperimental Study on the Effects of Compression Parameters on Molding Quality of Dried Fish Floss
Experimental Study on the Effects of Compression arameters on Molding Quality of Dried Fish Floss Hongmei Xu, Li Zong, Ling Li, and Jing Zhang College of Engineering and Technology, Huazhong Agricultural
More information,Chaojian He6, f. School of Guangxi University, Nanning , China.
5th International Conference on Environment, Materials, Chemistry and Power Electronics (EMCPE 2016) The Research on Running Characteristics of A New Type of Radiant Air Conditioning Combined with Fresh
More informationExperimental Study on Compact Heat Pump System for Clothes Drying Using CO 2 as a Refrigerant. Abstract
Experimental Study on Compact Heat Pump System for Clothes Drying Using CO 2 as a Refrigerant M. Honma, T. Tamura, Y. Yakumaru and F. Nishiwaki Matsushita Electric Industrial Co., Ltd. Living Environment
More informationCASE STUDY ANALYSIS OF CENTRIFUGAL FAN HIGH AMPLITUDE VIBRATION. Ken Singleton
CASE STUDY ANALYSIS OF CENTRIFUGAL FAN HIGH AMPLITUDE VIBRATION Ken Singleton Manager KSC Consulting LLC, Bristol VA ksingleton@vibrationconsulting.com Bob McGinnis. P.E. McGinnis Engineering LLC, Kingsport
More informationCapillary Tube and Thermostatic Expansion Valve Comparative Analysis in Water Chiller Air Conditioning
Journal of Physics: Conference Series PAPER OPEN ACCESS Capillary Tube and Thermostatic Expansion Valve Comparative Analysis in Water Chiller Air Conditioning To cite this article: Putu Wijaya Sunu et
More informationExperimental Study of Direct Contact Condensation of Steam on Water Droplets
, July 1-3, 2015, London, U.K. Experimental Study of Direct Contact Condensation of Steam on Water Droplets Semra GUMRUK, Murat K. AKTAS Abstract Air or water cooled condensers are used to reduce the moisture
More informationDevelopment 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 informationHEAT REMOVAL TESTS FOR THE HIGH PERFORMANCE VAULT STORAGE SYSTEM OF SPENT NUCLEAR FUEL
HEAT REMOVAL TESTS FOR THE HIGH PERFORMANCE VAULT STORAGE SYSTEM OF SPENT NUCLEAR FUEL M. Oda*, M. Shimizu*, N. Kumagai*, H. Kanai**, M. Tanabe** *Nuclear Fuel Cycle Group, Power & Industrial Systems R&D
More informationStudy on the North China Rural Water Supply Project O&M Cost Standard Rating
2016 3 rd International Conference on Engineering Technology and Application (ICETA 2016) ISBN: 978-1-60595-383-0 Study on the North China Rural Water Supply Project O&M Cost Standard Rating Lei Zhao China
More informationOmnisens DITEST TM FIBER OPTIC DISTRIBUTED TEMPERATURE & STRAIN SENSING TECHNIQUE
1 Omnisens DITEST TM FIBER OPTIC DISTRIBUTED TEMPERATURE & STRAIN SENSING TECHNIQUE Introduction Omnisens DITEST (Distributed Temperature and Strain sensing) is a distributed temperature and/or strain
More informationAnalysis 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 informationEXPLORING POSSIBILITIES WITH THE DEVELOPMENT OF THE LOOP HEAT PIPE TECHNOLOGY. Roger R. Riehl
EXPLORING POSSIBILITIES WITH THE DEVELOPMENT OF THE LOOP HEAT PIPE TECHNOLOGY Roger R. Riehl National Institute for Space Research INPE Space Mechanics and Control Division-DMC Av dos Astronautas 1758,
More informationFROSTING BEHAVIOR OF FIN-TUBE HEAT EXCHANGER ACCORDING TO REFRIGERANT FLOW TYPE
HEFAT2012 9 th International nference on Heat Transfer, Fluid Mechanics and Thermodynamics 16 18 July 2012 Malta FROSTING BEHAVIOR OF FIN-TUBE HEAT EXCHANGER ACCORDING TO REFRIGERANT FLOW TYPE Kim K.,
More informationY003 Multi-offset Seismic Acquisition Using Optical Fiber Behind Tubing
Y003 Multi-offset Seismic Acquisition Using Optical Fiber Behind Tubing C. Barberan* (Total E&P), C. Allanic (Total E&P), D. Avila (Total E&P), J. Hy- Billiot (Total E&P), A. Hartog (Schlumberger), B.
More informationIntegrated Development Of Noise-Dust Woodworking Machines At The Design Stage
IOP Conference Series: Earth and Environmental Science PAPER OPEN ACCESS Integrated Development Of Noise-Dust Woodworking Machines At The Design Stage To cite this article: A N Chukarin et al 2017 IOP
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 informationAnalysis of Eccentric Wear of Sucker Rod and Design of Multi-Stage Flexibility Stabilizer
International Journal of Science Vol.3 No.8 016 ISSN: 1813-4890 Analysis of Eccentric Wear of Sucker Rod and Design of Multi-Stage Flexibility Stabilizer Xu Liu, Lingwen Tang College of Mechanical and
More information