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论文类型:期刊论文
发表时间:2015-01-01
发表刊物:HEAT TRANSFER RESEARCH
收录刊物:SCIE、EI、Scopus
卷号:46
期号:3
页面范围:271-291
ISSN号:1064-2285
关键字:engine waste heat; hybrid refrigeration; heat transfer model
摘要:The waste heat characteristics of the exhaust gases from the coach engine were analyzed at different coach running speeds and different gears. Based on the waste heat load, the cycle thermal calculation results and the given operating conditions, the structural parameters of the main devices in the absorption-compression hybrid refrigeration cycles (ACHRC) were determined. The conditions of the temperatures of cooling air, condensation, and evaporation are 35 degrees C, 55 degrees C, and 3 degrees C, respectively, and the coach air-conditioning load is 30 kW. The performance of the ACHRC was investigated by coupling the heat transfer equations for the devices in the ACHRC and the cycle thermal calculation equations. The results indicate that the absorption refrigeration subcycle (ARSC) driven by the gases can completely meet the coach cooling requirement when the coach running speed reaches 105 km.h(-1). The cooling load is fully supplied by the compression refrigeration subcycle (CRSC) powered by the engine output when the coach running speed is lower than 40 km.h(-1).