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[1] Wang Fang, Lian Zhiwei, Fan Xiaowei, et al. Experimental study on characteristicsof transcritical heat pump water heater using refrigerant HFC125 [J]. Journal of Southeast University (English Edition), 2010, 26 (2): 182-186. [doi:10.3969/j.issn.1003-7985.2010.02.008]
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Experimental study on characteristicsof transcritical heat pump water heater using refrigerant HFC125()
HFC125跨临界热泵热水器性能实验研究
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
26
Issue:
2010 2
Page:
182-186
Research Field:
Energy and Power Engineering
Publishing date:
2010-06-30

Info

Title:
Experimental study on characteristicsof transcritical heat pump water heater using refrigerant HFC125
HFC125跨临界热泵热水器性能实验研究
Author(s):
Wang Fang1;  2;  Lian Zhiwei1;  2;  Fan Xiaowei2;  Wang Fengkun2
1School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
2School of Energy and Environmental Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China
王方1;  2;  连之伟1;  2;  范晓伟2;  王凤坤2
1上海交通大学机械与动力工程学院, 上海 200240; 2中原工学院能源与环境学院, 郑州 450007
Keywords:
HFC125;  transcritical cycle;  heat pump water heater;  coefficient of performance(COP)
HFC125;  跨临界循环;  热泵热水器;  COP
PACS:
TK172
DOI:
10.3969/j.issn.1003-7985.2010.02.008
Abstract:
To evaluate the performance of heat pumps using refrigerant HFC125, an experimental rig of a DC-inverter heat pump water heater is designed and set up, and the research on the transcritical heat pump water heater is carried out experimentally.It is found that there is a top value of the coefficient of performance(COP)when the system runs at 95 Hz of frequency.The relationships between the COP and compressor frequency, condensation pressure, evaporation pressure, condensation water temperature rise, and discharge temperature are discussed and analyzed at 95 Hz.And the COP of the HFC125 transcritical cycle is also compared with that of a R410 subcritical heat pump under the same conditions.The results indicate that there exists an optimum frequency for a better COP, and the system COP shows an increasing tendency with the decrease in condensation pressure and compressor ratio while the evaporation pressure remains invariant, and the COP decreases rapidly when cooling water temperature rises over 47.5 ℃.Compared with the R410A sub-critical cycle, the COP of HFC125 transcritical cycle significantly increases by 12% on average.
为深入了解HFC125跨临界循环热泵热水器的运行特性, 设计和建造了一个直流变频热泵热水器实验装置, 对HFC125跨临界循环热泵热水器性能进行了实验研究, 发现压缩机运行在95 Hz时系统存在一个COP峰值.然后以95 Hz为例, 研究了系统COP与压缩机频率、冷凝压力、蒸发压力、冷却水温升、压缩机排气温度等参数的关系, 并与R410A亚临界循环系统性能进行了比较.结果表明:系统存在一最优频率, 此时系统有较好的COP值, 系统COP随冷凝压力和压比的降低呈上升趋势, 而蒸发压力基本恒定;当冷却水温升超过47.5 ℃时, COP迅速下降.相对R410A亚临界循环, HFC125跨临界循环系统COP显著提升, 提高幅度平均在12%以上.

References:

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Memo

Memo:
Biographies: Wang Fang(1976—), male, graduate;Lian Zhiwei(corresponding author), male, doctor, professor, zwlian@sjtu.edu.cn.
Foundation item: The National Natural Science Foundation of China(No.50676059).
Citation: Wang Fang, Lian Zhiwei, Fan Xiaowei, et al.Experimental study on characteristics of transcritical heat pump water heater using refrigerant HFC125[J].Journal of Southeast University(English Edition), 2010, 26(2):182-186.
Last Update: 2010-06-20