| 摘要: |
| 分析了冷水机组的换热器热平衡，推导了其制冷性能系数极限值的计算方法。在GB/T18430.1—2007及AHRI 550/590—2011规定的工况下，分别对水冷冷水机组及风冷冷水机组的制冷性能系数COP的极限值及综合部分负荷性能系数IPLV的极限值进行了计算。结果表明，水冷冷水机组在GB/T18430.1—2007下的满负荷COP的极限值为10.01，IPLV的极限值为14.51，在AHRI 550/590—2011下的相应值分别为10.07及17.30。风冷冷水机组的相应值分别为7.37/10.25及7.30/16.11。风冷冷水机组盘管换热面积的大小及效率的高低会直接影响空气的温升大小，进而决定冷凝温度的高低，如果不能通过改进盘管设计、增大换热面积、提高盘管换热效率的方法，使满负荷下的盘管空气温升低于10℃，风冷冷水机组满负荷COP的极限值只有7.37，IPLV不可能超过10.25。 |
| 关键词: 冷水机组 能效 极限 |
| DOI： |
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| 基金项目: |
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| Theoretical Limit of Chiller Efficiency |
| Zhou Jinsheng |
| (Ingersoll Rand Engineering & Technology Center – Asia Pacific) |
| Abstract: |
| The energy conservation in chiller exchangers are analyzed in this paper, the formula of limit of coefficient of performance (COP) is then deduced. According to the working condition of GB/T 18430.1—2007 and AHRI 550/590—2011, the limits of COP and IPLV are calculated for water cooled chiller and air cooled chiller respectively. The results show that, the COP limit and IPLV limit of water cooled chiller is 10.01/14.51 at GB/T 18430.1—2007 condition and 10.07/17.3 at AHRI 550/590—2011 condition. For air cooled chiller, those values are 7.37/10.25 and 7.30/16.11. The air temperature increase through condenser coil and the condensing temperature is decided by its heat transfer area and effectiveness. If the former temperature in full load at rated condition can’t be achieved to be less than 10℃ by means of improving coil configuration, enlarging heat transfer area and improving the heat transfer effectiveness, the limit of COP of air cooled chiller in full load will be no more than 7.37, IPLV can’t be higher than 10.25. |
| Key words: chiller efficiency limit |
