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Analysis of a solar-assisted ejector cooling system for air conditioning

Author

Listed:
  • Szabolcs Varga
  • Armando C. Oliveira
  • Bogdan Diaconu

Abstract

Ejector refrigeration is one of the most promising technologies because of its relative simplicity and low initial cost. In this work, a theoretical study has been carried out to assess system and refrigeration efficiencies of a solar-assisted ejector cycle using water as the operating fluid. The model was based on a 1D ejector approach, including both the refrigeration and solar collector cycles. Ejector performance was evaluated for different operating conditions. The results indicated that in order to achieve an acceptable coefficient of performance, generator temperatures should not fall below 90°C. Evaporator temperatures below 10°C and condenser temperatures over 35°C resulted in a significant drop in system efficiency, and therefore these conditions can be identified as minimal (reference) design values. The required solar collector area to provide 5 kW of cooling power was calculated for different operating conditions. Ejector dimensions were also calculated using the constant pressure mixing ejector theory. Copyright The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org, Oxford University Press.

Suggested Citation

  • 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.
    • Handle: RePEc:oup:ijlctc:v:4:y:2009:i:1:p:2-8
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctn001
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    Citations

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    Cited by:

    1. 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.
    2. Chen, Xiangjie & Worall, Mark & Omer, Siddig & Su, Yuehong & Riffat, Saffa, 2013. "Theoretical studies of a hybrid ejector CO2 compression cooling system for vehicles and preliminary experimental investigations of an ejector cycle," Applied Energy, Elsevier, vol. 102(C), pages 931-942.
    3. 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.
    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. Kojok, Farah & Fardoun, Farouk & Younes, Rafic & Outbib, Rachid, 2016. "Hybrid cooling systems: A review and an optimized selection scheme," Renewable and Sustainable Energy Reviews, Elsevier, vol. 65(C), pages 57-80.
    6. Miri, Seyedeh Mohadeseh & Farzaneh-Gord, Mahmood & Kianifar, Ali, 2023. "Triple-objective MPSO of zeotropic-fluid solar ejector cycle integrated with cold storage tank based on techno-economic criteria," Energy, Elsevier, vol. 283(C).
    7. Alelyani, Sami M. & Sherbeck, Jonathan A. & Fette, Nicholas W. & Wang, Yuqian & Phelan, Patrick E., 2018. "Assessment of a novel heat-driven cycle to produce shaft power and refrigeration," Applied Energy, Elsevier, vol. 215(C), pages 751-764.
    8. Diaconu, Bogdan M. & Varga, Szabolcs & Oliveira, Armando C., 2011. "Numerical simulation of a solar-assisted ejector air conditioning system with cold storage," Energy, Elsevier, vol. 36(2), pages 1280-1291.
    9. 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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