电动汽车涡旋压缩机补气特性的数值研究
Numerical Investigation on the Characteristics of Vapor Injection of Scroll Compressor for Electric Vehicle
夏阳 1姜子琪 1张斌 1田雅芬 1李康1
作者信息
- 1. 上海理工大学能源与动力工程学院 上海 200093
- 折叠
摘要
为研究短型线的汽车空调涡旋压缩机的补气特性,以一款排量为38 cm3/r的电动汽车补气式涡旋压缩机为例,建立了三维非稳态数值计算模型,并通过实验数据验证了模型的准确性,误差在9.5％以内.通过模型分别研究补气压力和补气温度对涡旋压缩机性能的影响,结果表明:在补气过热度不变的情况下,随着补气压力的升高,压缩机排气温度先减小后逐渐增加,制热量呈增加趋势,当转速为5 000 r/min和6 000 r/min时,制热量最大增幅分别为20.5％和17.1％,制热COP先上升后下降,2种转速下有补气时制热COP的最大值较无补气时分别增加3.9％和2.3％,压缩机效率均先增大后减小,容积效率逐渐降低;在补气压力不变的情况下,随着补气温度的增加,排气温度略有增加,压缩机功耗、制热量及制热COP几乎保持不变;相较于补气温度,补气压力对压缩机性能的影响更大.
Abstract
To investigate the vapor injection performance of a scroll compressor with a short profile,a three-dimensional transient numerical model of a vapor-injection scroll compressor for an electric vehicle with a displacement of 38 cm3/r is established and verified with deviations within 9.5％.We investigated the effects of the pressure and temperature of vapor injection on the performance of the scroll compressor using the model.The results show that under the condition of a constant superheat,with an increase in injection pressure,the discharge temperature of the compressor initially decreases and then gradually increases.Moreover,the heating capacity exhibits an increasing trend,with the maximum increase in heating capacity reaching 20.5％and 17.1％at rotary speeds of 5 000 and 6 000 r/min,respectively.In addition,the heating coefficient of performance(COP)increases during the first stage and then decreases.Moreover,the maximum values of the heating COP with vapor injection at the former speeds were 3.9％and 2.3％higher than those without vapor injection,respectively.The compressor efficiency exhibits the same tendency as the heating COP,and the volumetric efficiency gradually decreases.The compressor discharge temperature increases slightly with constant injection pressure,whereas the compressor power,heating capacity,and heating COP remain almost constant as the injection temperature increases.Compared with the injection temperature,the injection pressure has a significant impact on the scroll compressor.
关键词
电动汽车涡旋压缩机/补气增焓/补气压力/补气温度Key words
electric vehicle scroll compressor/enhanced vapor injection(EVI)/injection pressure/injection temperature引用本文复制引用
基金项目
国家自然科学基金(52206016)
国家自然科学基金(51206022)
中央引导地方科技发展资金项目(YDZX20213100003002)
上海市青年科技英才扬帆计划(20YF1431700)
出版年
2024
国家科技期刊平台
NSTL
万方数据