Preliminary study on high temperature heat pump system with water refrigerant

doi:10.11949/j.issn.0438-1157.20181112

Abstract

Abstract:

In the face of serious energy and environment problems, energy conservation and environmental protection have always been the hotspot that needs special attention in national and international aspects. Combining the advantage of high temperature heat pump and natural refrigerant of water, water vapor high temperature heat pump system (WVHTHP) is the ideal heat pump system in the next generation. WVHTHP not only can effectively recycle low grade waste energy but also is a green and sustainable technology. The preliminary study shows the closed water vapor compression heat pump cycle is feasible under the condition of negative pressure evaporation and positive pressure condensation. And the confirmatory test show that when the compressor suction temperature is fixed 80℃ and the discharge temperature increases from 117℃ to 133℃, the system pressure ratio increases from 3.47 to 5.94 and the system COP decreases from 5.8 to 3.7. When the compressor discharge temperature is 120℃, and the system pressure ratio is 4.2 and the system COP is nearly 5. The system performance of WVHTHP is very superior, and it has great potential in industrial application.

摘要：

面对严重的能源与环境问题，开发节能与环保的新技术一直都是国内外特别重视的研究热点。采用自然工质水的高温热泵系统结合了高温热泵与自然工质水的优势，不仅可以有效地回收低品位热能，而且绿色环保，是理想的下一代高温热泵技术。从理论计算以及实验验证两方面对采用自然工质水的高温热泵系统进行了性能分析研究。结果表明，负压条件下蒸发、正压条件下冷凝的水蒸气闭式热泵循环系统是可行的，同时实验结果表明当压缩机吸气温度为80℃，排气饱和温度从117℃提高到133℃，系统压比从3.47升高到5.94时，采用自然工质水的高温热泵系统COP从5.6下降到3.7。其中压缩机的排气饱和温度为120℃，压比为4.2时，热泵系统的COP接近于5，性能优越，在工业生产中具有较大的推广应用价值。

CLC Number:

TH45
TB61

WU Di, HU Bin, WANG Ruzhu, JIANG Nanshan, LI Ziliang, YU Jingjing. Preliminary study on high temperature heat pump system with water refrigerant[J]. CIESC Journal, 2018, 69(S2): 95-100.

吴迪, 胡斌, 王如竹, 江南山, 李子亮, 余京京. 采用自然工质水的高温热泵系统性能分析[J]. 化工学报, 2018, 69(S2): 95-100.

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