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Energy analysis of a solar-assisted ejector cycle air conditioning system with low temperature thermal energy storage

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  • Diaconu, Bogdan M.

Abstract

Thermal energy storage is essential in solar cooling applications due to intermittent and uncontrollable availability of solar energy. Various technologies are available for low temperature energy storage. In the present work, a solar-assisted ejector cooling system with latent heat cold storage and conventional auxiliary heating was considered. The latter was applied in order to assure constant operating conditions for the ejector cycle. The analysis was carried out for an office building with cooling requirements during working hours only. The capacity of the cold storage was selected to ensure full coverage of the cooling load throughout the periods with cooling requirements. A quantitative energy analysis is presented, assessing the influence of parameters such as rated system power, ejector energy efficiency, solar collector area, ejector operating conditions and the amount of energy from the auxiliary source. Two energy efficiency parameters were defined, based on which the optimum system configuration and operating principle were identified. The advantages of each configuration were described.

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  • Diaconu, Bogdan M., 2012. "Energy analysis of a solar-assisted ejector cycle air conditioning system with low temperature thermal energy storage," Renewable Energy, Elsevier, vol. 37(1), pages 266-276.
    • Handle: RePEc:eee:renene:v:37:y:2012:i:1:p:266-276
    DOI: 10.1016/j.renene.2011.06.031
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    References listed on IDEAS

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    1. Szabolcs Varga & Armando C. Oliveira & Bogdan Diaconu, 2009. "Analysis of a solar-assisted ejector cooling system for air conditioning," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 4(1), pages 2-8, March.
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    6. Diaconu, Bogdan M. & Varga, Szabolcs & Oliveira, Armando C., 2010. "Experimental assessment of heat storage properties and heat transfer characteristics of a phase change material slurry for air conditioning applications," Applied Energy, Elsevier, vol. 87(2), pages 620-628, February.
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    Cited by:

    1. Gil, Antoni & Barreneche, Camila & Moreno, Pere & Solé, Cristian & Inés Fernández, A. & Cabeza, Luisa F., 2013. "Thermal behaviour of d-mannitol when used as PCM: Comparison of results obtained by DSC and in a thermal energy storage unit at pilot plant scale," Applied Energy, Elsevier, vol. 111(C), pages 1107-1113.
    2. Stritih, Uros & Osterman, Eneja & Evliya, Hunay & Butala, Vincenc & Paksoy, Halime, 2013. "Exploiting solar energy potential through thermal energy storage in Slovenia and Turkey," Renewable and Sustainable Energy Reviews, Elsevier, vol. 25(C), pages 442-461.
    3. Zeyghami, Mehdi & Goswami, D. Yogi & Stefanakos, Elias, 2015. "A review of solar thermo-mechanical refrigeration and cooling methods," Renewable and Sustainable Energy Reviews, Elsevier, vol. 51(C), pages 1428-1445.
    4. Al-Abidi, Abduljalil A. & Bin Mat, Sohif & Sopian, K. & Sulaiman, M.Y. & Lim, C.H. & Th, Abdulrahman, 2012. "Review of thermal energy storage for air conditioning systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(8), pages 5802-5819.
    5. Zhai, X.Q. & Wang, X.L. & Wang, T. & Wang, R.Z., 2013. "A review on phase change cold storage in air-conditioning system: Materials and applications," Renewable and Sustainable Energy Reviews, Elsevier, vol. 22(C), pages 108-120.
    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. Yan, Jia & Cai, Wenjian & Li, Yanzhong, 2012. "Geometry parameters effect for air-cooled ejector cooling systems with R134a refrigerant," Renewable Energy, Elsevier, vol. 46(C), pages 155-163.
    8. Parameshwaran, R. & Kalaiselvam, S. & Harikrishnan, S. & Elayaperumal, A., 2012. "Sustainable thermal energy storage technologies for buildings: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(5), pages 2394-2433.

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