| 回热器对跨临界CO2热泵系统性能的影响 |
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| 引用本文： | 金东旭,王平,小山繁,高田信夫.回热器对跨临界CO2热泵系统性能的影响[J].西南交通大学学报,2012,47(4):634-638. |
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| 作者姓名： | 金东旭 王平 小山繁 高田信夫 |
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| 作者单位： | 1. 大连理工大学能源与动力学院,辽宁大连,116024
2. 九州大学综合理工学研究院,福冈春日816-8580 |
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| 基金项目： | 教育部留学回国人员科研启动基金资助项目(教外司留[2008]890号);日本新能源产业技术综合开发机构(NEDO)项目(P05029)的资助 |
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| 摘 要： | 为了研究跨临界CO2热泵热水系统中,回热器传热面积对系统性能的影响,在不同的制冷剂充注量条件下实验研究了CO2热泵系统的性能.实验中,通过调节变频压缩机频率与电子膨胀阀开启度,保持了一定的制热量与蒸发器出口过热度.实验结果表明:在最佳制冷剂充注量条件下,随着回热器传热面积的增加,压缩机的压缩比下降,排气温度与吸气温度上升.采用回热器可以提高系统的最大制热系数,当回热器的无量纲传热面积为0.2时,可使最大制热系数提高约3.2%～5.1%.
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| 关 键 词： | CO2 热泵 回热器 性能 |
Effects of Internal Heat Exchanger on Performance of Transcritical CO2 Heat Pump System |
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| JIN Dongxu
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WANG Ping
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KOYAMA Shigeru
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TAKATA Nobuo.Effects of Internal Heat Exchanger on Performance of Transcritical CO2 Heat Pump System[J].Journal of Southwest Jiaotong University,2012,47(4):634-638. |
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| Authors: | JIN Dongxu WANG Ping KOYAMA Shigeru TAKATA Nobuo |
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| Institution: | JIN Dongxu1,WANG Ping1,KOYAMA Shigeru2,TAKATA Nobuo2(1.School of Energy and Power Engineering,Dalian University of Technology,Dalian 116024,China;2.Interdisciplinary Graduate School of Engineering Sciences,Kyushu University,Kasuga 816-8580,Japan) |
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| Abstract: | The performance of a transcritical CO2 heat pump system applied for hot water supply was experimentally investigated under various refrigerant charging conditions to clarify the effects of the heat transfer area of an internal heat exchanger(IHX) on the system performance.Experiments were conducted in the condition of constant heating capacity and evaporator outlet superheat by adjusting the compressor frequency and the opening of electronic expansion valve.Experimental results show that,at the optimum refrigerant charge,the compression ratio decreases while the discharge and suction temperatures increase with an increase in the IHX heat transfer area.Adopting an IHX can increase the maximum heating COP(coefficient of performance),and an improvement of about 3.2%-5.1% is obtained by using an IHX with a dimensionless heat transfer area of 0.2. |
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| Keywords: | CO2 heat pump internal heat exchanger performance |
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