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Study on the performance of a heat pump system using R744-based natural binary mixture
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[1]ZHANG Xian-ping,YANG Lei,WEI Xin-li,et al.Study on the performance of a heat pump system using R744-based natural binary mixture[J].Journal of Zhengzhou University (Engineering Science),2015,36(05):44-.[doi:10.3969/ j. issn. 1671 -6833.2015.o5.010]
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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 36卷 Number of periods: 2015 05 Page number: 44- Column: Public date: 2015-11-29
Title:
Study on the performance of a heat pump system using R744-based natural binary mixture
Author(s):
ZHANG Xian-ping1; 2; YANG Lei1; WEI Xin-li3; WANG Fang1; CHEN Ai-dong1
1. Department of Civil Engineering，Henan Institute of Engineering，Zhengzhou 451191,China;2.School of Chemical Engi-neering and Energy , Zhengzhou University , Zhengzhou 450001 ,China ; 3.School of Energy and Environment， Zhongyuan Uni-versity of Technology ,Zhengzhou 450007 ，China
Keywords:
R744 ;  mixture natural refrigerant ;  heat pump; TEWI;  smog
CLC:
TB61+5 TU833+ .1
DOI:
10.3969/ j. issn. 1671 -6833.2015.o5.010
Abstract:
The thermal model using EES (Engineering Equation Solver) is developed,and then the systemperformance of transcritical R744/R290 heat pump water heater is simulated with the meteorological andhydrological conditions in Zhengzhou,the typical city in central China. The total Equivalent Warming Impacts(TEWIs) are calculated with the simulation datum. The results show that the maximum heating system COP is4.104 under the design condition without consideration of internal heat exchanger. When R744/R290 heatpump water heater is on operation in cnetral China,the mean annual heating COP of 4.202 can be achieved.Compared with the hot water heater using other energy,the R744/R290 heat pump water heater is averagelydecreased by 36.39% in the CO,emissions. It is also cacalated and discussed how the internal heat exchangerand compressor isentropic efficiency influence the system performances respectively. Therefore,the R744/R290 based heat pump water heater is characterized by a higher energy efficiency and a very effective way forremarkably reducing CO,emissions.
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