Defrosting characteristics and energy consumption of new air-water dual source composite heat pump system

被引：0
作者：
Xu J. [1 ,2 ]
Zhao Y. [1 ]
Quan Z. [1 ]
Wang H. [2 ]
Zhao H. [2 ]
Wang J. [2 ]
机构：
[1] College of Architecture and Civil Engineering, Beijing University of Technology, Beijing
[2] Beijing Science and Technology Institute of Housing and Urban-Rural Development, Beijing
来源：
Zhao, Yaohua (yhzhao29@126.com) | 2018年 / Materials China卷 / 69期
关键词：
Coefficient of performance; Composite heat pump; Compressor; Defrosting; Optimization; Renewable energy;
D O I：
10.11949/j.issn.0438-1157.20171277
中图分类号：
学科分类号：
摘要：
Based on the operation testing of new air-water double source composite heat pump system (AWDSHPS-N), three defrosting modes were investigated under the same ambient condition, which included the condenser outlet refrigerant recooling defrosting(D-I), the low temperature-hot water defrosting(D-II), the condenser outlet refrigerant recooling and low temperature-hot water defrosting at same time (D-Ⅲ). Total coefficient of performance (COP) of AWDSHPS-N was used to evaluate the influence of the three modes. The influence on the total COP, defrosting operating characteristics and energy consumption of D-I, D-II and D-Ⅲ were discussed and compared with those in the reverse-cycle defrosting mode, under the same ambient condition. The results of test conditions indicated that for D-I and D-II, the total COP can be decreased by 0.42% and 3.93%, respectively, compared with the COP of frosting period. The heating power and COP during D-II defrosting were 27.4% and 17.8% higher than those of frosting operation, respectively. The total COP of AWDSHPS-N choosing D-I, D-II and D-Ⅲ were 26.06%, 29.79% and 17.02% higher than that of verse-cycle defrosting, and the defrosting energy consumption of D-I, D-II and D-Ⅲ were only 3.11%, 34.78% and 28.26% of the reverse-cycle defrosting energy consumption. © 2018, Science Press. All right reserved.
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页码：2646 / 2654
页数：8
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