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Indexed by:期刊论文

Date of Publication:2013-11-03

Journal:APPLIED THERMAL ENGINEERING

Included Journals:SCIE、EI、Scopus

Volume:61

Issue:2,SI

Page Number:747-755

ISSN No.:1359-4311

Key Words:Engine waste heat; Absorption-compression; Hybrid refrigeration cycle; Heat transfer model

Abstract:Through quantitatively analyzing the waste heat from a vehicle engine under different running conditions and calculating the heat load of devices in the absorption-compression hybrid refrigeration cycle, the heat transfer area and structure of the main unit are determined. The distributed parameter model of heat transfer between the exhaust gases and working fluids in the generator, as well as the lumped parameter model in the other heat exchangers are established. The research results show that the absorption refrigeration sub-cycle can completely meet the space cooling demand (30 kW) for the coach when it runs over 100 km h(-1). The compression refrigeration sub-cycle fully supplies the cooling load for the coach when speed is lower than 40 km h(-1). Both the sub-cycles work together to supply the space cooling for the coach when speed is between 40 km h(-1) and 100 km h(-1). In addition, the COP of the absorption-compression hybrid refrigeration cycle decreases with the rise in ambient temperature. (C) 2013 Elsevier Ltd. All rights reserved.