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Second law-based thermodynamic analysis of ammonia/sodium thiocyanate absorption system

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  • Zhu, Linghui
  • Gu, Junjie

Abstract

In this study, the first and second law of thermodynamics are used to analyze the performance of a novel absorption system for cooling and heating applications. The active component of the sorbent used in this study is sodium thiocyanate (NaSCN). Ammonia (NH3) is chosen as sorptive. A mathematic model based on exergy analysis is introduced to analyze the system performance. Enthalpy, entropy, temperature, mass flow rate and exergy loss of each component and the total exergy loss of the system are evaluated. Furthermore, the coefficient of performance (COP) and exergetic efficiency of the absorption system for cooling and heating processes are calculated from the thermodynamic properties of the working fluids under different operating conditions. The results show that the COP of cooling and heating increases with the heat source temperature and decreases with the cooling water inlet temperature, but the system exergetic efficiency does not show the same trends for both cooling and heating applications. The simulation results can be used for the thermodynamic optimization of the current system.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:35:y:2010:i:9:p:1940-1946
    DOI: 10.1016/j.renene.2010.01.022
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    References listed on IDEAS

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    1. 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.
    2. Wang, S.G. & Wang, R.Z., 2005. "Recent developments of refrigeration technology in fishing vessels," Renewable Energy, Elsevier, vol. 30(4), pages 589-600.
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    Cited by:

    1. Ayou, Dereje S. & Bruno, Joan Carles & Coronas, Alberto, 2017. "Integration of a mechanical and thermal compressor booster in combined absorption power and refrigeration cycles," Energy, Elsevier, vol. 135(C), pages 327-341.
    2. Takeshita, Keisuke & Amano, Yoshiharu, 2018. "Optimal operating conditions and cost-effectiveness of a single-stage ammonia/water absorption refrigerator based on exergy analysis," Energy, Elsevier, vol. 155(C), pages 1066-1076.
    3. Chen, Wei & Bai, Yang, 2016. "Thermal performance of an absorption-refrigeration system with [emim]Cu2Cl5/NH3 as working fluid," Energy, Elsevier, vol. 112(C), pages 332-341.
    4. Wu, Wei & Wang, Baolong & Shi, Wenxing & Li, Xianting, 2014. "An overview of ammonia-based absorption chillers and heat pumps," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 681-707.
    5. Garousi Farshi, L. & Mosaffa, A.H. & Infante Ferreira, C.A. & Rosen, M.A., 2014. "Thermodynamic analysis and comparison of combined ejector–absorption and single effect absorption refrigeration systems," Applied Energy, Elsevier, vol. 133(C), pages 335-346.

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