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

XU Junfang; ZHAO Yaohua; QUAN Zhenhua; WANG Huifen; ZHAO Huigang; WANG Jieteng

doi:10.11949/j.issn.0438-1157.20171277

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

更新时间：2025-12-10

- Defrosting characteristics and energy consumption of new air-water dual source composite heat pump system
- CIESC Journal Issue 6, Pages: 2646-2654(2018)
- 作者机构：
  
  1. 北京工业大学建筑工程学院,北京,100022
  2. 北京市住房和城乡建设科学技术研究所,北京,100021
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20171277
  CLC： K519
- Online First：05 June 2018，
  
  Published：05 June 2018
- 稿件说明：
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XU Junfang, ZHAO Yaohua, QUAN Zhenhua, et al. Defrosting characteristics and energy consumption of new air-water dual source composite heat pump system[J]. CIESC Journal, 2018, (6): 2646-2654.
DOI：

XU Junfang, ZHAO Yaohua, QUAN Zhenhua, et al. Defrosting characteristics and energy consumption of new air-water dual source composite heat pump system[J]. CIESC Journal, 2018, (6): 2646-2654. DOI： 10.11949/j.issn.0438-1157.20171277.

摘要

基于新型空气-水双热源复合热泵系统（AWDSHPS-N），实验研究了AWDSHPS-N采用冷凝器出口制冷剂再冷却除霜（D-I）、低温热水除霜（D-Ⅱ）、低温热水+冷凝器出口制冷剂再冷却除霜（D-Ⅲ）3种除霜模式进行除霜时对系统整体性能系数（COP）的影响，除霜期间系统运行特性及除霜所消耗的能量，并与逆循环除霜模式进行了对比分析。测试工况下的实验结果表明，除霜模式D-I和D-Ⅲ仅使系统整体COP较结霜运行期间的COP分别降低了0.42%和3.93%；D-Ⅱ除霜期间系统的制热功率和COP分别较结霜运行期间提高了27.4%和17.8%。D-I、D-Ⅱ和D-Ⅲ完成一次除霜能耗仅分别为逆循环除霜能耗的3.11%、34.78%和28.26%；采用此3种除霜模式时系统整体COP较采用逆循环除霜时分别提高了26.06%、29.79%和17.02%。

Abstract

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.

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