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http://dx.doi.org/10.5916/jkosme.2011.35.1.040

A Study on the Characteristics of Refrigeration System Installed with Precooler, and Liquid-Vapor Separator after Expansion Device  

Yun, Sang-Kook (한국해양대학교 기계정보공학부)
Abstract
The purpose of research is to understand the characteristics of refrigeration system having a liquid-vapor phase separator after expansion device and precooling heat exchanger. After expansion process of typical refrigerant of freezer, R134a, the cold vapor of the expanded refrigerant mixture is separated in the liquid-vapor separator and introduced in the precooling heat exchanger to enable the liquid refrigerant to be subcooled. The analysis results showed that the increasing rate of refrigeration capacity and COP can be 8.6% and 1.4%, each. The cause of these performance improvements is due to the difference of the slope of saturated vapor and saturated liquid lines in Mollier diagram of refrigerant.
Keywords
Refrigeration system; Liquid vapor separator; Precooling; COP; Refrigeration capacity;
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  • Reference
1 ASHRAE Handbook, Refrigeration, Chapter 39, pp. 39.1-39.4, 1998.
2 ASHRAE Handbook, Refrigeration, Chapter 1, pp. 1.8, 1998.
3 ASHRAE Handbook, Fundamentals, Chapter 19, pp. 19.24, 1997