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Exergy analysis of a liquid-desiccant-based, hybrid air-conditioning system

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  • Khalid Ahmed, C.S
  • Gandhidasan, P
  • Zubair, S.M
  • Al-Farayedhi, A.A

Abstract

We present the applicable exergy analysis and estimate irreversible losses that are generated during operation of a hybrid air-conditioning cycle with emphasis on a partly closed solar regenerator that is used to regenerate weak desiccant. The desiccant mass-flow rate has been chosen as the fundamental parameter for analysing the system. We find an optimum mass-flow rate for minimum irreversibility, i.e. maximum exergy. Large irreversibilities occur for high ambient vapor pressures, which tend to decrease the system exergy and overall performance of the regenerator.

Suggested Citation

  • Khalid Ahmed, C.S & Gandhidasan, P & Zubair, S.M & Al-Farayedhi, A.A, 1998. "Exergy analysis of a liquid-desiccant-based, hybrid air-conditioning system," Energy, Elsevier, vol. 23(1), pages 51-59.
    • Handle: RePEc:eee:energy:v:23:y:1998:i:1:p:51-59
    DOI: 10.1016/S0360-5442(97)00040-6
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    Cited by:

    1. Zhang, Lun & Wei, Hongyang & Zhang, Xiaosong, 2017. "Theoretical analysis of heat and mass transfer characteristics of a counter-flow packing tower and liquid desiccant dehumidification systems based on entransy theory," Energy, Elsevier, vol. 141(C), pages 661-672.
    2. Zhang, Qinling & Liu, Xiaohua & Zhang, Tao & Xie, Ying, 2020. "Performance optimization of a heat pump driven liquid desiccant dehumidification system using exergy analysis," Energy, Elsevier, vol. 204(C).
    3. Guan, Bowen & Zhang, Tao & Jun, Liu & Liu, Xiaohua, 2020. "Exergy analysis and performance improvement of liquid-desiccant deep-dehumidification system: An engineering case study," Energy, Elsevier, vol. 196(C).
    4. Wang, Hong Yue & Zhao, Ling Ling & Zhou, Qiang Tai & Xu, Zhi Gao & Kim, Hyung Taek, 2008. "Exergy analysis on the irreversibility of rotary air preheater in thermal power plant," Energy, Elsevier, vol. 33(4), pages 647-656.
    5. Xiong, Z.Q. & Dai, Y.J. & Wang, R.Z., 2010. "Development of a novel two-stage liquid desiccant dehumidification system assisted by CaCl2 solution using exergy analysis method," Applied Energy, Elsevier, vol. 87(5), pages 1495-1504, May.
    6. Hassan, H.Z. & Mohamad, A.A., 2012. "A review on solar cold production through absorption technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(7), pages 5331-5348.
    7. Yin, Yonggao & Qian, Junfei & Zhang, Xiaosong, 2014. "Recent advancements in liquid desiccant dehumidification technology," Renewable and Sustainable Energy Reviews, Elsevier, vol. 31(C), pages 38-52.
    8. Salah El-Din, M.M, 2000. "On the optimization of solar-driven refrigerators," Renewable Energy, Elsevier, vol. 20(1), pages 87-93.
    9. Kumar, Ritunesh & Dhar, P.L. & Jain, Sanjeev, 2011. "Development of new wire mesh packings for improving the performance of zero carryover spray tower," Energy, Elsevier, vol. 36(2), pages 1362-1374.
    10. Zhang, Lun & Song, Xia & Zhang, Xiaosong, 2019. "Theoretical analysis of exergy destruction and exergy flow in direct contact process between humid air and water/liquid desiccant solution," Energy, Elsevier, vol. 187(C).

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