Comparative Study of Two Kinds of Automotive Air Conditioning System with Three Heat Exchangers and Four-way Valve

Electric vehicles don’t have enough waste heat for heating in winter, so the introduction of heat pump system to electric vehicles is of great significance. Two kinds of heat pump system with three heat exchangers and four-way valve are researched in the article, and the result shows that: in most conditions, the two systems’ ability are similar, the difference between them is only 10W to 50W, but the COP of four-way valve system is 15% ~ 18% higher than that of three heat exchanger system, and the compressor power of four-way valve system is 50 to 150W lower than that of three heat exchanger system.