TY - JOUR
T1 - Experimental Study of an Air Conditioning-Heat Pump System for Electric Vehicles
AU - Feng, Lili
AU - Hrnjak, Predrag
N1 - Funding Information:
This study was funded by the Air Conditioning and Refrigeration Center at the University of Illinois at Urbana-Champaign. Support from ACRC colleagues and member companies are thankfully acknowledged!
Publisher Copyright:
Copyright © 2016 SAE International.
PY - 2016
Y1 - 2016
N2 - This paper presents the experimentally obtained performance characteristics of an air conditioning-heat pump system that uses heat exchangers from a commercially available Nissan Leaf EV. It was found that refrigerant charge needed for cooling operation was larger than that for heating function with the test setup. The effects of: a). indoor air flow rate, b). outdoor air flow rate, and c). compressor speed on heating capacity and energy efficiency were explored and presented. Appropriate opening size of expansion valve that controlled subcooling for better energy efficiency was discussed and results were presented. Expansion valve opening size also strongly affected charge migration. Warm-up tests at different ambient conditions showed the necessity of a secondary heater to be reserved for very low ambient temperature.
AB - This paper presents the experimentally obtained performance characteristics of an air conditioning-heat pump system that uses heat exchangers from a commercially available Nissan Leaf EV. It was found that refrigerant charge needed for cooling operation was larger than that for heating function with the test setup. The effects of: a). indoor air flow rate, b). outdoor air flow rate, and c). compressor speed on heating capacity and energy efficiency were explored and presented. Appropriate opening size of expansion valve that controlled subcooling for better energy efficiency was discussed and results were presented. Expansion valve opening size also strongly affected charge migration. Warm-up tests at different ambient conditions showed the necessity of a secondary heater to be reserved for very low ambient temperature.
UR - http://www.scopus.com/inward/record.url?scp=85072365488&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85072365488&partnerID=8YFLogxK
U2 - 10.4271/2016-01-0257
DO - 10.4271/2016-01-0257
M3 - Conference article
AN - SCOPUS:85072365488
SN - 0148-7191
JO - SAE Technical Papers
JF - SAE Technical Papers
T2 - SAE 2016 World Congress and Exhibition
Y2 - 12 April 2016 through 14 April 2016
ER -