带喷射器的跨临界CO_(2)车用空调系统实验研究

Experimental Study of a Trans-Critical CO_(2) Mobile Air Conditioning System with an Ejector

在焓差实验室中研制了一套车用二氧化碳(CO_(2))喷射制冷空调系统,在标准汽车空调性能实验台上对不同工况参数下的CO_(2)制冷系统性能进行评估,并对比分析了CO_(2)喷射制冷系统的性能优势.研究结果表明:车用CO_(2)喷射制冷空调系统制冷量与车用CO_(2)常规制冷系统制冷量相当;增大室内侧风量与提高压缩机转速能够有效提升CO_(2)喷射制冷系统的制冷量,喷射器在不同工况下能够提升系统能效比(COP)1.65%~12.60%;室外温度对车用CO_(2)喷射制冷系统的性能影响显著,该系统在高温环境下会出现明显的性能衰减.

A carbon dioxide(CO_(2))ejector expansion air conditioning system for vehicles is developed in a calorimeter laboratory.In experimental tests on a standard mobile air conditioning bench,the effects of different operating parameters on the performance of the CO_(2) refrigeration system for vehicles are studied,and the performance advantages of the CO_(2) ejector expansion refrigeration system are comparatively analyzed.The research results show that the cooling capacity of the CO_(2) ejector expansion refrigeration system for vehicles is almost equal to that of the CO_(2) conventional cooling system.Both increasing the indoor air flow rate and increasing the compressor speed can effectively increase the cooling capacity of the CO_(2) ejector expansion refrigeration system,and the ejector can increase the coefficient of performance(COP)of the system by 1.65%to 12.60%under different working conditions.The outdoor temperature has a great impact on the CO_(2) ejector expansion refrigeration system performance,and the performance of CO_(2) ejector expansion refrigeration system for vehicles decays obviously at a high ambient temperature.