| 过热度和高压压力对跨临界CO2汽车空调系统的影响 |
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| 引用本文： | 张会勇,李俊明,王补宣.过热度和高压压力对跨临界CO2汽车空调系统的影响[J].清华大学学报(自然科学版),2005,45(11). |
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| 作者姓名： | 张会勇 李俊明 王补宣 |
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| 作者单位： | 清华大学,热能工程系,北京,100084;清华大学,热能工程系,北京,100084;清华大学,热能工程系,北京,100084 |
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| 基金项目： | 北京市科委资助项目(H021820041420) |
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| 摘 要： | 为对跨临界CO2空调系统进行优化设计,考虑压缩机绝热效率随压比的变化,分析了过热度、气体冷却器出口温度以及高压压力等对系统性能系数(COP)的影响,并与不考虑压缩机绝热效率随压比变化的情况进行了对比。结果表明:系统存在最佳高压和最佳过热度;最佳过热度随着气体冷却器出口温度的提高而增大;气体冷却器和压缩机效率是影响系统性能的主要因素;在较大高压压力下,与气体冷却器和压缩机效率相比,过热度的影响可以忽略不计。
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| 关 键 词： | 跨临界 二氧化碳 汽车空调 |
Effects of superheat temperature and high pressure on transcritical automobile air conditioning systems using carbon dioxide as refrigerant |
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| ZHANG Huiyong,LI Junming,WANG Buxuan.Effects of superheat temperature and high pressure on transcritical automobile air conditioning systems using carbon dioxide as refrigerant[J].Journal of Tsinghua University(Science and Technology),2005,45(11). |
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| Authors: | ZHANG Huiyong LI Junming WANG Buxuan |
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| Abstract: | The relationship between the compressor efficiency and compression ratio was analyzed in terms of the superheat temperature,the refrigerant temperature at the gas cooler outlet,and the high pressure on the coefficient of performance(COP) to optimize a transcritical automobile air conditioning system using carbon dioxide as refrigerant.The calculated results show that optimal high pressure and superheat temperature for the system increase with increasing gas cooler outlet temperature,and that the compressor efficiency and the gas cooler efficiency are the main factors affecting the system performance with the effects of the superheat temperature being negligible at sufficiently high pressures. |
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| Keywords: | transcritical carbon dioxide automobile air conditioning |
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