| 环保型CO_2跨临界带膨胀机制冷循环性能研究 |
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| 引用本文： | 谢英柏,孙刚磊,宗露香,靳光亚.环保型CO_2跨临界带膨胀机制冷循环性能研究[J].环境科学与技术,2010,33(3). |
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| 作者姓名： | 谢英柏 孙刚磊 宗露香 靳光亚 |
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| 作者单位： | 华北电力大学动力工程系,河北,保定,071003 |
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| 摘 要： | 由于CFCs和HCFCs人工合成制冷剂破坏大气臭氧层,并产生温室效应,因此用自然工质替代合成工质越来越受到国内外制冷界的重视。文章对环保型CO2制冷工质进行了综合评价,并利用热力学原理建立模型,分析了CO2跨临界带膨胀机制冷循环的性能。结果表明:与CO2跨临界带节流阀制冷循环相比,CO2跨临界带膨胀机制冷循环明显提高了系统的性能系数(COP)。同时在保持压缩机排气压力和膨胀机等熵效率一定时,CO2跨临界带膨胀机制冷循环系统COP随着气体冷却器出口温度的增加而逐渐降低,但随着蒸发温度的增加而快速增加。在实际系统设计过程中,应综合考虑以上影响因素,以使系统设计最优化。
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| 关 键 词： | CO2自然工质 跨临界循环 膨胀机 热力学分析 性能系数 |
Performances of Environmental Benign CO_2 Transcritical Refrigeration Cycle with an Expander |
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| XIE Ying-bai,SUN Gang-lei,ZONG Lu-xiang,JIN Guang-ya.Performances of Environmental Benign CO_2 Transcritical Refrigeration Cycle with an Expander[J].Environmental Science and Technology,2010,33(3). |
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| Authors: | XIE Ying-bai SUN Gang-lei ZONG Lu-xiang JIN Guang-ya |
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| Institution: | XIE Ying-bai,SUN Gang-lei,ZONG Lu-xiang,JIN Guang-ya (Department of Power Engineering,North China Electric Power University,Baoding 071003,China) |
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| Abstract: | Synthetic refrigerants such as CFCs and HCFCs deplete ozone and cause greenhouse effect. CO2 as a natural working fluids,is receiving more and more attention in the refrigeration field. The comprehensive evaluation of environment-friendly CO2 refrigeration working fluids is carried out. The performances of CO2 transcritical refrigeration cycle are analyzed by establishing the thermodynamics model. Results indicate that the maximum coefficient of performance (COP)of the cycle with an expander is higher than ... |
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| Keywords: | CO_2 nature refrigerant transcritical cycle expander thermodynamic analysis COP |
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