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Energy and exergy analyses of the diffusion absorption refrigeration system

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  • Yıldız, Abdullah
  • Ersöz, Mustafa Ali

Abstract

This paper describes the thermodynamic analyses of a DAR (diffusion absorption refrigeration) cycle. The experimental apparatus is set up to an ammonia–water DAR cycle with helium as the auxiliary inert gas. A thermodynamic model including mass, energy and exergy balance equations are presented for each component of the DAR cycle and this model is then validated by comparison with experimental data. In the thermodynamic analyses, energy and exergy losses for each component of the system are quantified and illustrated. The systems' energy and exergy losses and efficiencies are investigated. The highest energy and exergy losses occur in the solution heat exchanger. The highest energy losses in the experimental and theoretical analyses are found 25.7090 W and 25.4788 W respectively, whereas those losses as to exergy are calculated 13.7933 W and 13.9976 W. Although the values of energy efficiencies obtained from both the model and experimental studies are calculated as 0.1858, those values, in terms of exergy efficiencies are found 0.0260 and 0.0356.

Suggested Citation

  • Yıldız, Abdullah & Ersöz, Mustafa Ali, 2013. "Energy and exergy analyses of the diffusion absorption refrigeration system," Energy, Elsevier, vol. 60(C), pages 407-415.
    • Handle: RePEc:eee:energy:v:60:y:2013:i:c:p:407-415
    DOI: 10.1016/j.energy.2013.07.062
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    References listed on IDEAS

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    1. Ben Ezzine, N. & Garma, R. & Bourouis, M. & Bellagi, A., 2010. "Experimental studies on bubble pump operated diffusion absorption machine based on light hydrocarbons for solar cooling," Renewable Energy, Elsevier, vol. 35(2), pages 464-470.
    2. Ben Ezzine, N. & Garma, R. & Bellagi, A., 2010. "A numerical investigation of a diffusion-absorption refrigeration cycle based on R124-DMAC mixture for solar cooling," Energy, Elsevier, vol. 35(5), pages 1874-1883.
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    Cited by:

    1. Wang, Shengnan & Li, Yunhua & Li, Yun-Ze & Peng, Xing & Mao, Yufeng, 2018. "Exergy based parametric analysis of a cooling and power co-generation system for the life support system of extravehicular spacesuits," Renewable Energy, Elsevier, vol. 115(C), pages 1209-1219.

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