PERFORMANCE SIMULATION OF GAS COOLER FOR CO2 HEAT PUMP SYSTEM USING TWO STAGE COMPRESSOR
Due to the environmental problems caused by global warming, many studies are currently on-going to develop heat pump system using carbon dioxide, a natural refrigerant. The critical temperature of carbon dioxide is lower than ambient air temperature. Thus, hot gas refrigerant is cooled as single phase gas cooling process. The outlet temperature of gas cooler has a great effect on the efficiency of carbon dioxide heat pump system. In order to obtain high efficiency, larger heat transfer area of gas cooler is demanded. Another promising method to enhance system efficiency is adoption of two stage compressor, which requires an air-cooled intercooler heat exchanger to cool the hot gas from first stage compression process. Owing to limited frontal area of heat exchanger and cost, as intercooler grows larger, the heat transfer area of gas cooler becomes smaller. Thus the optimum distribution of heat exchanger between gas cooler and intercooler considering maximum system performance. This study suggested various performance simulation results for a given design of gas cooler.
Young-Soo Chang Dong-Won Han
Intelligent System Division, Korea Institute of Science and Technology,39-1 Hawolgok-dong, Seongbuk-gu, Seoul 136-791, Korea
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）