电动汽车热泵型空调除霜实验研究

作者:武卫东;吴佳玮;余强元 刊名:汽车工程 上传者:陈雪原

【摘要】针对纯电动汽车热泵型空调换热器冬季结霜问题,提出低压热气除霜和高压热气除霜两种除霜循环模式,并在焓差室模拟实际工况,进行了结霜除霜实验研究。以除霜时间、排气压力和压缩机能耗为指标,对各种除霜模式(包括传统逆循环除霜模式)进行了对比分析。结果表明:在3种除霜模式中,低压热气除霜模式所需除霜时间最长,排气压力最高,除霜过程中压缩机能耗最大;逆循环除霜模式次之,且车内环境舒适度较差;而高压热气模式除霜时间最短(仅2min),排气压力最低(最高仅为0.65MPa),能耗最小(仅为86.83kJ),且不会对车内环境舒适性造成影响,故是一种较为理想的除霜模式。

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2018年(第 40卷)第 3 期 汽 车 工 程 Automotive Engineering 2018(V〇1.40)N〇.3 doi : 10.19562/j.chinasae.qcgc.2018.03.019 电 动 汽 车 热 泵 型 空 调 除 霜 实 验 研 究 + 武卫东,吴佳玮,余强元 (上海理工大学制冷与低温工程研究所,上 海 200093) [摘要]针对纯电动汽车热泵型空调换热器冬季结霜问题,提出低压热气除霜和高压热气除霜两种除霜循环 模式,并在焓差室模拟实际工况,进行了结霜除霜实验研究。以除霜时间、排气压力和压缩机能耗为指标,对各种除 霜模式(包括传统逆循环除霜模式)进行了对比分析。结果表明:在3种除霜模式中,低压热气除霜模式所需除霜 时间最长,排气压力最高,除霜过程中压缩机能耗最大;逆循环除霜模式次之,且车内环境舒适度较差;而高压热气 模式除霜时间最短(仅2min),排气压力最低(最高仅为0. 65MPa),能耗最小(仅为86. 83kJ),且不会对车内环境舒 适性造成影响,故是一种较为理想的除霜模式。关键词:纯电动汽车;热泵;空调;除霜;实验研究 A n Experim ental Study on Defrosting of Heat Pum p A ir Conditioner in Battery Electric V ehicles Wu Weidong, Wu Jiawei & Yu Qiangyuan Institute of Refrigeration and Cryogenic Engineering, University of Shanghai for Science and Technology, Shanghai 200093 [Abstract ] In order to solve the problem of frosting on the heat exchanger in the heat pump type air condi tioner of battery electric vehicles, two defrosting cycles i.e. low pressure hot gas (LPHG) defrosting and high pressure hot gas (HPHG) defrosting are proposed with an experimental study on frosting and defrosting conducted by simulating the real working conditions in enthalpy difference chamber. The defrosting modes, including traditional reverse cycle defrosting mode, are compared and analyzed with defrosting time, exhaust pressure and compressor energy consumption as evaluating indicators. The results show that among three defrosting cycles, the LPHG cycle has longest defrosting time, highest exhaust pressure and highest compress

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