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Indexed by:会议论文

Date of Publication:2014-09-21

Included Journals:EI、Scopus

Page Number:239-246

Abstract:In the present study, a dynamic simulation model is developed to simulate a refrigeration system by considering the fan characteristics and the dynamic response of the variations of condensing temperature (Te) and evaporating temperature (Tc) due to frosting to the system. In the model, the mean frost thickness of the overall control volumes in the evaporator is taken as a variable to calculate the air volume flow rate, and the mean frost thickness of the air tunnel is taken as a variable to consider the air maldistribution at windward side. A series of experiments have been carried out to validate the proposed model by means of the microphotograph method. The deviations for Te and Tc were limited to 1 C2?C, respectively. Both the simulation and experimental results demonstrate that the refrigerating capacity, the Tc, and Te of the refrigeration system are increased slightly at the early stage of frosting, and then are gradually decreased; finally they are reduced sharply at the late stage of frosting. ? 2015 Taylor & Francis Group, London.