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Experimental investigation on regeneration performance, heat and mass transfer characteristics in a forced solar collector/regenerator

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  • Peng, Donggen
  • Zhang, Xiaosong

Abstract

A regenerator is one of the main components of a solar liquid desiccant cooling system. The regenerator used in this application is a forced counter flow type solar collector/regenerator(C/R). Experimental results of the tests indicate that there occurs a maximum value for regeneration efficiency at some air flow-rate. The regeneration efficiency of solution at ambient temperature decreases with the increase in solution flow-rate, instead of increasing at moderate temperature. The inlet temperature of solution has great influence on the regeneration efficiency and a higher concentration of solution is accompanied by a lower efficiency of regeneration. Compared with the regeneration efficiency at Ya,in = 20 g/kg, the regeneration efficiency was increased by about 40% at Ya,in = 10 g/kg. Higher solar radiation intensity will better regeneration performance of the C/R. Air flow-rate has far more effect on heat and mass coefficients between air and solution than solution flow-rate. The solution inlet temperature and salt concentration have contrary effects on heat and mass transfer coefficients with increase in their values. By Simpson numerical integration, two correlations on heat and mass transfer characteristics were given. Finally, it was concluded that the proposed solar collector/regenerator performs satisfactorily in humid climates of the Southern China.

Suggested Citation

  • Peng, Donggen & Zhang, Xiaosong, 2016. "Experimental investigation on regeneration performance, heat and mass transfer characteristics in a forced solar collector/regenerator," Energy, Elsevier, vol. 101(C), pages 296-308.
    • Handle: RePEc:eee:energy:v:101:y:2016:i:c:p:296-308
    DOI: 10.1016/j.energy.2016.02.028
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    References listed on IDEAS

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    1. Peng, Donggen & Luo, Danting & Cheng, Xiaosong, 2018. "Modeling and performance comparisons of the grading and single solar collector/ regenerator systems with heat recovery," Energy, Elsevier, vol. 144(C), pages 736-749.
    2. Ali, Ameer & Ishaque, Kashif & Lashin, Aref & Al Arifi, Nassir, 2017. "Modeling of a liquid desiccant dehumidification system for close type greenhouse cultivation," Energy, Elsevier, vol. 118(C), pages 578-589.
    3. Long, Tianhe & Zheng, Dimeng & Li, Yongcai & Liu, Shuli & Lu, Jun & Shi, Dachuan & Huang, Sheng, 2022. "Experimental study on liquid desiccant regeneration performance of solar still and natural convective regenerators with/without mixed convection effect generated by solar chimney," Energy, Elsevier, vol. 239(PA).
    4. Liu, Wei & Gong, Yanfeng & Niu, Xiaofeng & Shen, Junjie & Kosonen, Risto, 2019. "Dynamic modeling of liquid-desiccant regenerator based on a state–space method," Applied Energy, Elsevier, vol. 240(C), pages 744-753.

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