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Studies of compressor pressure ratio effect on GAXAC (generator-absorber-exchange absorption compression) cooler

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  • Ramesh kumar, A.
  • Udayakumar, M.

Abstract

This paper presents simulation studies conducted on a GAXAC cycle of capacity 3.514 kW using ammonia-water as working fluid for cooling applications. The low side pressure ratio of (compressor pressure ratio) of the cycle has been optimized for optimum COP. The effects of temperatures of the generator, condenser, absorber and evaporator on the COP of the cycle as a function of low side pressure ratio have been studied. The effect of the low side pressure ratio on the heat duties (kW) of the cycle has also been studied. It is found that for a given value of desorber and approach temperatures, the optimum COP corresponding to the optimum pressure ratio is independent of the temperatures of condenser, absorber and evaporator. The optimum COP for the desorber temperatures 110 °C, 130 °C, 150 °C and approach temperature 14 °C at all optimum pressure ratios are found to be 1.00, 0.97 and 0.94, respectively. Comparison of GAXAC and standard GAX cycle was carried out and found that GAXAC cycle has 26% higher value of COP than the standard GAX cycle.

Suggested Citation

  • Ramesh kumar, A. & Udayakumar, M., 2008. "Studies of compressor pressure ratio effect on GAXAC (generator-absorber-exchange absorption compression) cooler," Applied Energy, Elsevier, vol. 85(12), pages 1163-1172, December.
    • Handle: RePEc:eee:appene:v:85:y:2008:i:12:p:1163-1172
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    Citations

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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. Ventas, R. & Vereda, C. & Lecuona, A. & Venegas, M., 2012. "Experimental study of a thermochemical compressor for an absorption/compression hybrid cycle," Applied Energy, Elsevier, vol. 97(C), pages 297-304.
    3. Chen, Yi & Han, Wei & Jin, Hongguang, 2015. "An absorption–compression refrigeration system driven by a mid-temperature heat source for low-temperature applications," Energy, Elsevier, vol. 91(C), pages 215-225.
    4. Wu, Wei & You, Tian & Wang, Baolong & Shi, Wenxing & Li, Xianting, 2014. "Simulation of a combined heating, cooling and domestic hot water system based on ground source absorption heat pump," Applied Energy, Elsevier, vol. 126(C), pages 113-122.
    5. Yari, Mortaza & Zarin, Arash & Mahmoudi, S.M.S., 2011. "Energy and exergy analyses of GAX and GAX hybrid absorption refrigeration cycles," Renewable Energy, Elsevier, vol. 36(7), pages 2011-2020.
    6. Wu, Wei & Shi, Wenxing & Wang, Jian & Wang, Baolong & Li, Xianting, 2016. "Experimental investigation on NH3–H2O compression-assisted absorption heat pump (CAHP) for low temperature heating under lower driving sources," Applied Energy, Elsevier, vol. 176(C), pages 258-271.
    7. Abed, Azher M. & Alghoul, M.A. & Sopian, K. & Majdi, Hasan Sh. & Al-Shamani, Ali Najah & Muftah, A.F., 2017. "Enhancement aspects of single stage absorption cooling cycle: A detailed review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 77(C), pages 1010-1045.
    8. Khani, Leyla & Mahmoudi, S. Mohammad S. & Chitsaz, Ata & Rosen, Marc A., 2016. "Energy and exergoeconomic evaluation of a new power/cooling cogeneration system based on a solid oxide fuel cell," Energy, Elsevier, vol. 94(C), pages 64-77.
    9. Jawahar, C.P. & Saravanan, R., 2010. "Generator absorber heat exchange based absorption cycle--A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 14(8), pages 2372-2382, October.
    10. 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.
    11. Rameshkumar, A. & Udayakumar, M. & Saravanan, R., 2009. "Heat transfer studies on a GAXAC (generator-absorber-exchange absorption compression) cooler," Applied Energy, Elsevier, vol. 86(10), pages 2056-2064, October.
    12. Meng, Xuelin & Zheng, Danxing & Wang, Jianzhao & Li, Xinru, 2013. "Energy saving mechanism analysis of the absorption–compression hybrid refrigeration cycle," Renewable Energy, Elsevier, vol. 57(C), pages 43-50.

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