Measurement and research on improving the performance of dual-temperature refrigerator system

Ching-Song Jwo; Ching-Wei Hsu

doi:10.1117/12.885485

28 December 2010 Measurement and research on improving the performance of dual-temperature refrigerator system

Ching-Song Jwo, Ching-Wei Hsu

Proceedings Volume 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation; 75446Z (2010) https://doi.org/10.1117/12.885485
Event: Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 2010, Hangzhou, China

Abstract

This study presents a "cold-stored liquid-vapor heat exchanger" to improve the performance of dual-temperature refrigerator system, for the installation of "cold-stored liquid-vapor heat exchanger" to measure the improving the performance of system. The study designs four different experimental models for making analytical discussion, and these models include: Model-A, dual-temperature refrigerator system (control group); Model-B, electronic expansion valve, which replaces mechanical evaporating pressure regulating valve; Model-C, dual-temperature refrigerator system equipped with a "traditional liquid heat exchanger"; and Model-D, dual-temperature refrigerator system equipped with an "cold-stored liquid-vapor heat exchanger" developed by the study. As known from analysis of the experimental data, under the operation of Model-B, the overheating situation at the return conduit of medium-temperature evaporator can be effectively controlled. Furthermore, the model can enhance the refrigeration speed, and improve the problems of accumulation of refrigerator oil as well as the shutdown and instability of pump appeared in traditional evaporating pressure regulating valve. After making analysis and comparison under the operation of Model-C, the COP of dual-temperature refrigerator is found improved by around 21.7%. When experimental analysis and comparison are made under the operation of Model-D, it is found that air-cooled liquid-gas heat exchanger can effectively provide better overcooling degree, and this device can improve the exhaust of compressor and excessively high temperature of machine shell. Eventually, the overall COP can be effectively improved by around 29.5%.

Citation Download Citation

Ching-Song Jwo and Ching-Wei Hsu "Measurement and research on improving the performance of dual-temperature refrigerator system", Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75446Z (28 December 2010); https://doi.org/10.1117/12.885485

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KEYWORDS

Liquids

Performance modeling

Systems modeling

Control systems

Receivers

Data modeling

Temperature metrology

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