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Exergy analysis of lithium bromide/water absorption systems

Author

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  • Şencan, Arzu
  • Yakut, Kemal A.
  • Kalogirou, Soteris A.

Abstract

Exergy analysis of a single-effect lithium bromide/water absorption system for cooling and heating applications is presented in this paper. Exergy loss, enthalpy, entropy, temperature, mass flow rate and heat rate in each component of the system are evaluated. From the results obtained it can be concluded that the condenser and evaporator heat loads and exergy losses are less than those of the generator and absorber. This is due to the heat of mixing in the solution, which is not present in pure fluids. Furthermore, a simulation program is written and used for the determination of the coefficient of performance (COP) and exergetic efficiency of the absorption system under different operating conditions. The results show that the cooling and heating COP of the system increase slightly when increasing the heat source temperature. However, the exergetic efficiency of the system decreases when increasing the heat source temperature for both cooling and heating applications.

Suggested Citation

  • Şencan, Arzu & Yakut, Kemal A. & Kalogirou, Soteris A., 2005. "Exergy analysis of lithium bromide/water absorption systems," Renewable Energy, Elsevier, vol. 30(5), pages 645-657.
    • Handle: RePEc:eee:renene:v:30:y:2005:i:5:p:645-657
    DOI: 10.1016/j.renene.2004.07.006
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    Citations

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    Cited by:

    1. Chahartaghi, Mahmood & Sheykhi, Mohammad, 2019. "Energy, environmental and economic evaluations of a CCHP system driven by Stirling engine with helium and hydrogen as working gases," Energy, Elsevier, vol. 174(C), pages 1251-1266.
    2. Ustaoglu, Abid, 2020. "Parametric study of absorption refrigeration with vapor compression refrigeration cycle using wet, isentropic and azeotropic working fluids: Conventional and advanced exergy approach," Energy, Elsevier, vol. 201(C).
    3. Wonchala, Jason & Hazledine, Maxwell & Goni Boulama, Kiari, 2014. "Solution procedure and performance evaluation for a water–LiBr absorption refrigeration machine," Energy, Elsevier, vol. 65(C), pages 272-284.
    4. Gebreslassie, Berhane H. & Groll, Eckhard A. & Garimella, Suresh V., 2012. "Multi-objective optimization of sustainable single-effect water/Lithium Bromide absorption cycle," Renewable Energy, Elsevier, vol. 46(C), pages 100-110.
    5. Koroneos, C. & Nanaki, E. & Xydis, G., 2010. "Solar air conditioning systems and their applicability—An exergy approach," Resources, Conservation & Recycling, Elsevier, vol. 55(1), pages 74-82.
    6. Onan, C. & Ozkan, D.B. & Erdem, S., 2010. "Exergy analysis of a solar assisted absorption cooling system on an hourly basis in villa applications," Energy, Elsevier, vol. 35(12), pages 5277-5285.
    7. Rosiek, S. & Batlles, F.J., 2009. "Integration of the solar thermal energy in the construction: Analysis of the solar-assisted air-conditioning system installed in CIESOL building," Renewable Energy, Elsevier, vol. 34(6), pages 1423-1431.
    8. Ammar M. Bahman & Eckhard A. Groll, 2020. "Application of Second-Law Analysis for the Environmental Control Unit at High Ambient Temperature," Energies, MDPI, vol. 13(12), pages 1-20, June.
    9. Gebreslassie, Berhane H. & Medrano, Marc & Boer, Dieter, 2010. "Exergy analysis of multi-effect water–LiBr absorption systems: From half to triple effect," Renewable Energy, Elsevier, vol. 35(8), pages 1773-1782.
    10. Gong, Sunyoung & Goni Boulama, Kiari, 2014. "Parametric study of an absorption refrigeration machine using advanced exergy analysis," Energy, Elsevier, vol. 76(C), pages 453-467.
    11. Kaynakli, O., 2008. "The first and second law analysis of a lithium bromide/water coil absorber," Energy, Elsevier, vol. 33(5), pages 804-816.
    12. Zhu, Linghui & Gu, Junjie, 2010. "Second law-based thermodynamic analysis of ammonia/sodium thiocyanate absorption system," Renewable Energy, Elsevier, vol. 35(9), pages 1940-1946.
    13. Szabó, Gábor L. & Kalmár, Ferenc, 2019. "Investigation of energy and exergy performances of radiant cooling systems in buildings – A design approach," Energy, Elsevier, vol. 185(C), pages 449-462.
    14. Anvari, Simin & Khoshbakhti Saray, Rahim & Bahlouli, Keyvan, 2015. "Conventional and advanced exergetic and exergoeconomic analyses applied to a tri-generation cycle for heat, cold and power production," Energy, Elsevier, vol. 91(C), pages 925-939.
    15. Lake, Andrew & Rezaie, Behanz, 2018. "Energy and exergy efficiencies assessment for a stratified cold thermal energy storage," Applied Energy, Elsevier, vol. 220(C), pages 605-615.
    16. Gebreslassie, Berhane H. & Guillén-Gosálbez, Gonzalo & Jiménez, Laureano & Boer, Dieter, 2009. "Design of environmentally conscious absorption cooling systems via multi-objective optimization and life cycle assessment," Applied Energy, Elsevier, vol. 86(9), pages 1712-1722, September.
    17. Colorado, D. & Hernández, J.A. & El Hamzaoui, Y. & Bassam, A. & Siqueiros, J. & Andaverde, J., 2011. "Error propagation on COP prediction by artificial neural network in a water purification system integrated to an absorption heat transformer," Renewable Energy, Elsevier, vol. 36(5), pages 1315-1322.
    18. Thu, Kyaw & Saha, Bidyut Baran & Chua, Kian Jon & Bui, Thuan Duc, 2016. "Thermodynamic analysis on the part-load performance of a microturbine system for micro/mini-CHP applications," Applied Energy, Elsevier, vol. 178(C), pages 600-608.

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