| 摘要: |
| 为研究冷冻水流量与温度变化对基于大滑移温度非共沸工质双温冷水机组性能的影响规律，本文在大滑移温度非共沸工质的双温冷水机组实验台进行了多组实验研究。实验分别研究了非共沸工质R32/R236fa在不同质量组分比例（0.4~0.6，0.5~0.5，0.6~0.4）下，冷冻水流量由0.25 m3/h增大到0.45 m3/h，以及高温冷冻水温度变化时，冷水机组性能的变化情况。实验结果表明，在冷却水进出口温度为32 ℃与37 ℃，高、低温冷冻水温度分别为7 ℃，16 ℃时，不同冷冻水流量下冷水机组的制冷效率（COP）最大为4.17，最小COP为3.27。此外，高温冷冻水温度变化对冷水机组COP存在明显影响。实验为大滑移温度的双温冷水机组的应用提出了数据基础。 |
| 关键词: 非共沸工质 变流量 COP 大滑移温度 |
| DOI： |
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| 基金项目:国家自然科学基金（51376044）和国家科技支撑计划（2011BAJ03B14）项目资助。 |
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| Effect of Variable Chilled Water Flow Rates and Temperature on Performance of Double Temperature Chiller with Large Temperature Glide Zeotropic Refrigerant |
| Liu Jian,Zhang Xiaosong |
| (School of Energy and Environment, Southeast University) |
| Abstract: |
| To study the effect of variable chilled water flow rates and temperature on double temperature chiller with large temperature glide zeotropic refrigerant, the chiller’s performance under different conditions was investigated experimentally, including mass concentration ratio of R32/R236fa (0.4~0.6, 0.5~0.5, 0.6~0.4), chilled water flow rates change from 0.25 m3/h to 0.45 m3/h and temperature change of the high temperature chilling water. The experimental results show that the maximum and minimum COP of the unit under different flow rates is 4.17 and 3.27 respectively, this moment, the inlet and outlet water temperature of condenser are 32 ℃ and 37℃, the high-low temperature chilling water are 7 ℃ and 16 ℃. In addition, the temperature change of high temperature chilled water have obvious effect on the performance of the unit. At last, the results of this paper provide database for the application of double temperature chiller. |
| Key words: zeotropic variable flow rate COP large temperature glide |
