標題: Modeling and simulation of the transcritical CO2 heat pump system
作者: Lin, Kai-Hsiang
Kuo, Cheng-Shu
Hsieh, Wen-Der
Wang, Chi-Chuan
機械工程學系
Department of Mechanical Engineering
關鍵字: Carbon dioxide;Gas cooler;System modeling;COP;Transcritical
公開日期: 1-Dec-2013
摘要: In this study, a CO2 transcritical cycle model without imposing any excessive constraints such as fixed discharge pressure and suction pressure is developed. The detailed geometrical variation of the gas cooler and the evaporator have been taken into account. The model is validated with the experimental measurements. Parametric influences on the CO2 system with regard to the effect of dry bulb temperature, relative humidity, inlet water temperature, compressor speed, and the capillary tube length are reported. The COP increases with the dry bulb temperature or the inlet relative humidity of the evaporator. Despite the refrigerant mass flowrate may be increased with the inlet water temperature, the COP declines considerably with it. Increasing the compressor speed leads to a higher heating capacity and to a much lower COP. Unlike those of the conventional sub-critical refrigerant, the COP of the transcritical CO2 cycle does not reveal a maximum value against the capillary tube length. (C) 2013 Elsevier Ltd and IIR. All rights reserved.
URI: http://dx.doi.org/10.1016/j.ijrefrig.2013.08.008
http://hdl.handle.net/11536/23648
ISSN: 0140-7007
DOI: 10.1016/j.ijrefrig.2013.08.008
期刊: INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
Volume: 36
Issue: 8
起始頁: 2048
結束頁: 2064
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