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Suggested solution concentration for an energy-efficient refrigeration system combined with condensation heat-driven liquid desiccant cycle

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  • She, Xiaohui
  • Yin, Yonggao
  • Zhang, Xiaosong

Abstract

This paper presents a hybrid energy-efficient refrigeration system enhanced by liquid desiccant evaporative cooling technology for subcooling the refrigerant, where the liquid desiccant cycle is driven by the exhausted heat from the condenser and three commonly used liquid desiccants: LiCl, LiBr and CaCl2 aqueous solutions are considered here. The solution concentration for the proposed hybrid energy-efficient refrigeration system should be determined and optimized carefully for better performance. Sensitive study of solution concentration involved in the hybrid system is conducted at different condensation temperature. The results indicates that under standard working condition (i.e., condensing temperature is 50 °C), the optimum solution concentration is 0.31 for LiCl aqueous solution, 0.45 for LiBr aqueous solution and 0.42 for CaCl2 aqueous solution, while the maximum COPs are nearly same. When the condensing temperature is 45 °C, the optimum solution concentration should be set at 0.27 for LiCl aqueous solution, and 0.41 for LiBr aqueous solution and 0.37 for CaCl2 aqueous solution, while condensing temperature is 55 °C, it is 0.35 for LiCl aqueous solution, 0.49 for LiBr aqueous solution and 0.45 for CaCl2 aqueous solution. The simple fitting formulas are obtained, and performance improvement potential is discussed.

Suggested Citation

  • She, Xiaohui & Yin, Yonggao & Zhang, Xiaosong, 2015. "Suggested solution concentration for an energy-efficient refrigeration system combined with condensation heat-driven liquid desiccant cycle," Renewable Energy, Elsevier, vol. 83(C), pages 553-564.
    • Handle: RePEc:eee:renene:v:83:y:2015:i:c:p:553-564
    DOI: 10.1016/j.renene.2015.05.003
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    References listed on IDEAS

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    Cited by:

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    2. Jan Taler & Bartosz Jagieła & Magdalena Jaremkiewicz, 2022. "Overview of the M-Cycle Technology for Air Conditioning and Cooling Applications," Energies, MDPI, vol. 15(5), pages 1-19, March.
    3. Luo, Yimo & Chen, Yi & Yang, Hongxing & Wang, Yuanhao, 2017. "Study on an internally-cooled liquid desiccant dehumidifier with CFD model," Applied Energy, Elsevier, vol. 194(C), pages 399-409.
    4. She, Xiaohui & Cong, Lin & Nie, Binjian & Leng, Guanghui & Peng, Hao & Chen, Yi & Zhang, Xiaosong & Wen, Tao & Yang, Hongxing & Luo, Yimo, 2018. "Energy-efficient and -economic technologies for air conditioning with vapor compression refrigeration: A comprehensive review," Applied Energy, Elsevier, vol. 232(C), pages 157-186.
    5. Shukla, D.L. & Modi, K.V., 2022. "Influence of distinct input parameters on performance indices of dehumidifier, regenerator and on liquid desiccant-operated evaporative cooling system – A critical review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 168(C).
    6. Pei, Wang & Cheng, Qing & Jiao, Shun & Liu, Lin, 2019. "Performance evaluation of the electrodialysis regenerator for the lithium bromide solution with high concentration in the liquid desiccant air-conditioning system," Energy, Elsevier, vol. 187(C).

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