期刊
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
卷 62, 期 -, 页码 232-241出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrefrig.2015.10.024
关键词
Experiment; Heat pump air conditioner; Vapor injection; Twin rotary compressor; Heating performance; Variable speed
资金
- Shanghai Hitachi Electrical Appliances Co., Ltd.
- Qingdao Haier Air Conditioning Electronic Co., Ltd.
A newly designed twin rotary variable speed compressor was adopted to improve the heating performance of a vapor injection heat pump air conditioner (HPAC) at cold regions in this study. The performances of a R410A HPAC were measured and investigated. The results showed that an optimum intermediate pressure existed to achieve the maximum heating capacity and system COP for the injection cycle, and the heating capacity was enhanced effectively by increasing compressor frequency, however, at the cost of COP decrease. Comparative research on system performances between injection and non-injection cycles indicated that the newly designed compressor could improve the heating performance of the HPAC at low ambient temperatures. Specifically, the system's heating capacity was enhanced by 5.6%-14.4%, and COP improvement reached up to 3.5%. Vapor injection cycle was not suggested at high ambient temperatures due to its lower COP compared with non-injection cycles. (C) 2016 Elsevier Ltd and International Institute of Refrigeration. All rights reserved.
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