PERFORMANCE OF DUAL-PRESSUR CONDENSATION HEAT PUMP WATER HEATER USING NON-ZEOTROPIC WORKING MEDIUM

Dai Baomin; Liu Xiao; Liu Shengchun; Feng Yining; Liu Jia; Xiao Peng

doi:10.19912/j.0254-0096.tynxb.2021-1027

PDF(2391 KB)

Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (2) : 344-352. DOI: 10.19912/j.0254-0096.tynxb.2021-1027

PERFORMANCE OF DUAL-PRESSUR CONDENSATION HEAT PUMP WATER HEATER USING NON-ZEOTROPIC WORKING MEDIUM

Dai Baomin¹, Liu Xiao¹, Liu Shengchun¹, Feng Yining¹, Liu Jia¹, Xiao Peng²

Author information +

History +

Abstract

A new configuration of dual-pressure condensation heat pump water heater system （DPS） is proposed, and hydrocarbon （HC） zeotropic working medium is used as refrigerant. Therefore, the water is heated continously step by step with low exergy destruction in the condenser. Then, the thermal performance of the system is optimized by golden section method. The results indicate that the thermodynamic with pure refrigerant. The dual-pressure condensation system obtains the maximum coefficient of performance （COP） at the optimal intermediate water temperature. Under the normal working condition of the heat pump water heater, the COP of DPS system using R600/R601a（40/60） is as high as 5.17, which is 9.45% and 14.25% higher than that of DPS system and the single-stage system with pure refrigerant, respectively. When non-zeotropic working medium with suitable temperature glide is used, the exergy destruction can be significantly reduced to improve thermal matching of the condenser, the exergy efficiency of the overall system is enhanced by up to 11.70%. Consequently, it is recommended that R600/R601a（40/60） is the best candidate for water heater heat pump under normal working condition.

Key words

refrigerant / heat pump system / hydrocarbon / energy efficiency / temperature matching

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

Dai Baomin, Liu Xiao, Liu Shengchun, Feng Yining, Liu Jia, Xiao Peng. PERFORMANCE OF DUAL-PRESSUR CONDENSATION HEAT PUMP WATER HEATER USING NON-ZEOTROPIC WORKING MEDIUM[J]. Acta Energiae Solaris Sinica. 2023, 44(2): 344-352 https://doi.org/10.19912/j.0254-0096.tynxb.2021-1027

References

[1] 杜祥琬,冯丽妃. 碳达峰与碳中和引领能源革命[N]. 中国科学报, 2020-12-22(001).
DU X W, FENG L F. Carbon peaking and carbon neutrality are leading the energy revolution[N]. Chinese science daily, 2020-12-22(001).
[2] WILLEM H, LIN Y, LEKOV A.Review of energy efficiency and system performance of residential heat pump water daily[J]. Energy and buildings, 2017, 143:191-201.
[3] HEREDIA-ARICAPA Y, BELMAN-FLORES J M, MOTA-BABILONI A, et al. Overview of low GWP mixtures for the replacement of HFC refrigerants: R134a, R404A and R410A[J]. International journal of refrigeration, 2020, 111: 113-123.
[4] 代宝民, 李敏霞, 吕佳桐, 等. 超临界CO₂/R41小通道内的换热特性[J]. 化工学报, 2015, 66(3): 924-931.
DAI B M, LI M X, LYU J T, et al.Heat transfer characteristics of supercritical CO₂/R41 flowing in mini-channel[J]. CIESC journal, 2015, 66(3): 924-931.
[5] PUROHIT P, BORGFORD-PARNELL N, KLIMONT Z, et al.Achieving Paris climate goals calls for increasing ambition of the Kigali amendment[J]. Nature climate change, 2022, 12(4): 339-342.
[6] HARBY K.Hydrocarbons and their mixtures as alternatives to environmental unfriendly halogenated refrigerants: an updated overview[J]. Renewable and sustainable energy reviews, 2017, 73: 1247-1264.
[7] HEPBASLI A, KALINCI Y.A review of heat pump water heating systems[J]. Renewable and sustainable energy reviews, 2009, 13(6-7): 1211-1229.
[8] IEC 60335-2-89:2019, Household and similar electrical appliances-Safety -Part 2-89: Particular requirements for commercial refrigerating appliances and ice-makers with an incorporated or remote refrigerant unit or motor-compressor[S].
[9] ZHANG J F, QIN Y, WANG C C.Review on CO₂ heat pump water heater for residential use in Japan[J]. Renewable and sustainable energy reviews, 2015, 50:1383-1391.
[10] 许文华, 李惟毅, 郭强. 考虑环境影响的CO₂/低GWP混合工质热泵热水器工质优选[J].太阳能学报,2018, 39(1): 84-89.
XU W H, LI W Y, GUO Q.Working fluids selecting of CO₂ blends with low-GWP(global warming potential) heat pump system considering impact of environment[J]. Acta energiae solaris sinica, 2018, 39(1): 84-89.
[11] 吴薇, 王玲珑, 张甜湉. 一体化太阳能热泵热水器蓄能特性对比研究[J]. 太阳能学报, 2015, 36(9): 2211-2216.
WU W, WANG L L, ZHANG T T.Comparative study on storage characteristics of the integrated solar heat pump water heater[J]. Acta energiae solaris sinica, 2015, 36(9): 2211-2216.
[12] DAI B M, LIU X, LIU S C, et al.Dual-pressure condensation high temperature heat pump system for waste heat recovery: energetic and exergetic assessment[J]. Energy conversion and management, 2020, 218: 112997.
[13] BAMIGBETAN O, EIKEVIK T M, NEKSÄ P, et al.Experimental investigation of a prototype R-600 compressor for high temperature heat pump[J]. Energy, 2019, 169: 730-738.
[14] BAMIGBETAN O, EIKEVIK T M, NEKSÄ P, et al.The development of a hydrocarbon high temperature heat pump for waste heat recovery[J]. Energy, 2019, 173: 1141-1153.
[15] NAWAZ K, SHEN B, ELATAR A, et al.R290 (propane) and R600a(isobutane) as natural refrigerants for residential heat pump water heaters[J]. Applied thermal engineering, 2017, 127: 870-883.
[16] GB/T 23137—2020, 家用和类似用途热泵热水器[S].
GB/T 23137—2020, Heat pump water heater for household and similar application[S].
[17] DAI B M, DANG C B, LI M X, et al.Thermodynamic performance assessment of carbon dioxide blends with low-global warming potential(GWP) working fluids for a heat pump water heater[J]. International journal of refrigeration, 2015, 56: 1-14.
[18] United Nations Environment Programme (UNEP). 2010 assessment report of the technology and economic assessment panel: montreal protocol on substances that deplete the ozone layer[R]. Nairobi, Kenya, 2010.
[19] 李姗姗, 李舒宏, 张小松. 复合热源CO₂热泵热水器的模拟分析[J]. 化工学报, 2014, 65(增刊2): 256-264.
LI S S, LI S H, ZHANG X S.Simulation of CO₂ heat pump water heater with hybrid heat sources[J]. CIESC journal, 2014, 65(S2): 256-264.
[20] CALM J, HOURRAHAN G.Physical, safety, and environmental data for current and alternative refrigerants[C]//Proceedings of 23rd International Congress of Refrigeration, Prague, Czech Republic, 2011.
[21] GALINDO J, RUIZ S, DOLZ V, et al.Advanced exergy analysis for a bottoming organic Rankine cycle coupled to an internal combustion engine[J]. Energy conversion and management, 2016, 126: 217-227.
[22] ZÜHLSDORF B, JENSEN J K, CIGNITTI S, et al. Analysis of temperature glide matching of heat pumps with zeotropic working fluid mixtures for different temperature glides[J]. Energy, 2018, 153: 650-660.