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Performance analysis of a novel dual-nozzle ejector enhanced cycle for solar assisted air-source heat pump systems

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  • Zhu, Lin
  • Yu, Jianlin
  • Zhou, Mengliu
  • Wang, Xiao

Abstract

In this study, a novel dual-nozzle ejector enhanced vapor-compression cycle (DEVC) for solar assisted air-source heat pump systems is proposed. In DEVC, the use of the dual-nozzle ejector for recovering the expansion losses is a very promising approach to improve the cycle performance. A mathematical model of the DEVC is developed to predict its performance under specified operating conditions. The simulation results indicate that for the range of given operating conditions, the coefficient of performance (COP) and the volumetric heating capacity of the novel cycle using refrigerant R410A are theoretically improved by 4.60–34.03% and 7.81–51.95% over conventional ejector enhanced vapor-compression cycle (CEVC), respectively. The results imply that the solar-air source heat pump systems could take advantage of the best features of the DEVC. The potential use of DEVC therefore deserves further experimental validation. It is expected that this new cycle will be beneficial to developing dual-source coupled heat pump applications.

Suggested Citation

  • Zhu, Lin & Yu, Jianlin & Zhou, Mengliu & Wang, Xiao, 2014. "Performance analysis of a novel dual-nozzle ejector enhanced cycle for solar assisted air-source heat pump systems," Renewable Energy, Elsevier, vol. 63(C), pages 735-740.
    • Handle: RePEc:eee:renene:v:63:y:2014:i:c:p:735-740
    DOI: 10.1016/j.renene.2013.10.030
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    5. Ni, Long & Dong, Jiankai & Yao, Yang & Shen, Chao & Qv, Dehu & Zhang, Xuedan, 2015. "A review of heat pump systems for heating and cooling of buildings in China in the last decade," Renewable Energy, Elsevier, vol. 84(C), pages 30-45.
    6. Besagni, Giorgio & Mereu, Riccardo & Inzoli, Fabio, 2016. "Ejector refrigeration: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 373-407.
    7. Mohanraj, M. & Belyayev, Ye. & Jayaraj, S. & Kaltayev, A., 2018. "Research and developments on solar assisted compression heat pump systems – A comprehensive review (Part A: Modeling and modifications)," Renewable and Sustainable Energy Reviews, Elsevier, vol. 83(C), pages 90-123.
    8. Zou, Lingeng & Liu, Ye & Yu, Jianlin, 2023. "Energy, exergy and economic evaluation of a solar enhanced ejector expansion heat pump cycle," Renewable Energy, Elsevier, vol. 217(C).
    9. Li, Yunhai & Li, Zhaomeng & Fan, Yi & Zeng, Cheng & Cui, Yu & Zhao, Xudong & Li, Jing & Chen, Ying & Chen, Jianyong & Shen, Chao, 2023. "Experimental investigation of a novel two-stage heat recovery heat pump system employing the vapor injection compressor at cold ambience and high water temperature conditions," Renewable Energy, Elsevier, vol. 205(C), pages 678-694.
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