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First and second laws analysis of the heat pipe/ejector refrigeration cycle

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  • Ziapour, Behrooz M.
  • Abbasy, Ahad

Abstract

Integration of the heat pipe with an ejector will result in a compact and high performance system. The concept of the heat pipe/ejector refrigeration cycle is discussed, in this paper. The needed driving capillary forces are firmly established. The basic characteristics of the system, such as entrainment ratio, coefficient of performance, exergy efficiency and thermal efficiency of the system are evaluated. Also, the zero-dimensional constant pressure mixing theory is applied to ejector. In this study, water is used as the working fluid. Whenever the mixed flow is supersonic, a normal shockwave is assumed to occur upstream of diffuser inlet. The simulation results indicate that, the coefficient of performance can reach about 0.30 at Te=10°C, Tc=30°C and Tg=100°C. Also, the second law efficiency of the heat pipe/ejector refrigeration cycle increases with increasing evaporator temperature and decreasing condenser temperature. It is seen that, the maximum heat pipe cooling capacity obtains for large heat pipe diameters, near the small heat pipe lengths. It has proven that, this refrigeration system can be widely used in many areas, especially in renewable energy utilization such as solar energy.

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  • Ziapour, Behrooz M. & Abbasy, Ahad, 2010. "First and second laws analysis of the heat pipe/ejector refrigeration cycle," Energy, Elsevier, vol. 35(8), pages 3307-3314.
    • Handle: RePEc:eee:energy:v:35:y:2010:i:8:p:3307-3314
    DOI: 10.1016/j.energy.2010.04.016
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    References listed on IDEAS

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    1. Leidenfrost, W. & Lee, K.H. & Korenic, B., 1980. "Conservation of energy estimated by second law analysis of a power-consuming process," Energy, Elsevier, vol. 5(1), pages 47-61.
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    Cited by:

    1. Chen, Xiangjie & Omer, Siddig & Worall, Mark & Riffat, Saffa, 2013. "Recent developments in ejector refrigeration technologies," Renewable and Sustainable Energy Reviews, Elsevier, vol. 19(C), pages 629-651.
    2. Haghparast, Payam & Sorin, Mikhail V. & Nesreddine, Hakim, 2018. "The impact of internal ejector working characteristics and geometry on the performance of a refrigeration cycle," Energy, Elsevier, vol. 162(C), pages 728-743.
    3. Jouhara, Hussam & Ajji, Zaki & Koudsi, Yahia & Ezzuddin, Hatem & Mousa, Nisreen, 2013. "Experimental investigation of an inclined-condenser wickless heat pipe charged with water and an ethanol–water azeotropic mixture," Energy, Elsevier, vol. 61(C), pages 139-147.
    4. Besagni, Giorgio & Mereu, Riccardo & Inzoli, Fabio, 2016. "Ejector refrigeration: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 373-407.
    5. Zhang, Sheng & Cheng, Yong, 2017. "Performance improvement of an ejector cooling system with thermal pumping effect (ECSTPE) by doubling evacuation chambers in parallel," Applied Energy, Elsevier, vol. 187(C), pages 675-688.
    6. Tashtoush, Bourhan M. & Al-Nimr, Moh'd A. & Khasawneh, Mohammad A., 2019. "A comprehensive review of ejector design, performance, and applications," Applied Energy, Elsevier, vol. 240(C), pages 138-172.

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