Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 102, Issue -, Pages 39-49Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2015.01.024
Keywords
Air source heat pump; Refrigerant injection; Electric vehicle; Low ambient temperature; Experimental investigation
Categories
Funding
- National Natural Science Foundation of China [51176199]
- External Cooperation Program of BIC, Chinese Academy of Sciences [1A1111KYSB20130032]
- Prometeo Project of the Secretariat of Higher Education, Science, Technology and Innovation of Ecuador
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Since the performance of conventional air source heat pump (ASHP) for electric vehicles (EVs) is apt to decline sharply in low ambient temperature, it will consume more electricity of the cell, and affect driving mileage in cold regions. Aiming at developing high efficiency heating system for EVs in cold regions, an ASHP system applying refrigerant injection for EVs is designed, as well as the test bench is built to investigate its performance. According to the operation condition of EVs, heating performances are tested on different in-car inlet air temperature and various fresh air ratios under -20 degrees C ambient temperature. The system cycle process with refrigerant injection, as well as the influences of refrigerant injection and dryness are also analyzed and discussed. The results show that the heating capacity of the ASHP with refrigerant injection can be increased up to 31%, and in comparison with the conventional heat pump system its heating performance is better when in-car inlet temperature is above -10 degrees C. Therefore, ASHP with refrigerant injection has great potentiality to be applied for the EVs in cold regions. (c) 2015 Elsevier Ltd. All rights reserved.
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