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An analytical model for coupled heat and mass transfer processes in solar collector/regenerator using liquid desiccant

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  • Peng, Donggen
  • Zhang, Xiaosong

Abstract

Solar collector/regenerator (C/R) using liquid desiccant combines solar photothermic transformation and regeneration of liquid desiccant together, effectively achieving the regeneration for solar energy-driven liquid desiccant cooling systems. In this paper a group of dimensionless heat and mass transfer equations describing the heat and mass transfer process in the solar C/R were obtained by introducing total temperature difference ([Delta]T0) and dimensionless heat loss coefficient . For the sake of predicting the heat loss of air stream and simplifying calculation, the models of dimensionless air temperature ([theta]a) and equilibrium humidity ratio (YeL) along with the height of solar C/R were put forward. An analytical solution was formed by two differential equations on the dimensionless heat and mass transfer driving potentials and the heat and mass conservation equations. Compared with the numerical simulation results, the analytical results on the outlet parameters of solar C/R have great precision with different Lewis factor Le, total temperature difference [Delta]T0 and air-to salt mass flow rate ratio ASMR. Simultaneously, the effects of above variables on the regeneration performance were analyzed. Lastly, by comparing with the experimental data, the analytical calculation results can agree well with the experimental results validating the analytical model is an ideal way for predicting the performance of the solar C/R.

Suggested Citation

  • Peng, Donggen & Zhang, Xiaosong, 2011. "An analytical model for coupled heat and mass transfer processes in solar collector/regenerator using liquid desiccant," Applied Energy, Elsevier, vol. 88(7), pages 2436-2444, July.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:7:p:2436-2444
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    References listed on IDEAS

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    1. Ani, F.N. & Badawi, E.M. & Kannan, K.S., 2005. "The effect of absorber packing height on the performance of a hybrid liquid desiccant system," Renewable Energy, Elsevier, vol. 30(15), pages 2247-2256.
    2. Yang, Ru & Wang, Pai-Lu, 1994. "The optimum glazing height of a glazed solar collector/regenerator for open-cycle absorption cooling," Energy, Elsevier, vol. 19(9), pages 925-931.
    3. Kabeel, A.E., 2005. "Augmentation of the performance of solar regenerator of open absorption cooling system," Renewable Energy, Elsevier, vol. 30(3), pages 327-338.
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    1. Angrisani, Giovanni & Roselli, Carlo & Sasso, Maurizio, 2015. "Experimental assessment of the energy performance of a hybrid desiccant cooling system and comparison with other air-conditioning technologies," Applied Energy, Elsevier, vol. 138(C), pages 533-545.
    2. Wang, Xinli & Cai, Wenjian & Lu, Jiangang & Sun, Youxian & Zhao, Lei, 2015. "Model-based optimization strategy of chiller driven liquid desiccant dehumidifier with genetic algorithm," Energy, Elsevier, vol. 82(C), pages 939-948.
    3. Enteria, Napoleon & Yoshino, Hiroshi & Mochida, Akashi, 2013. "Review of the advances in open-cycle absorption air-conditioning systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 28(C), pages 265-289.
    4. Li, Xian & Liu, Shuai & Tan, Kok Kiong & Wang, Qing-Guo & Cai, Wen-Jian & Xie, Lihua, 2016. "Dynamic modeling of a liquid desiccant dehumidifier," Applied Energy, Elsevier, vol. 180(C), pages 435-445.
    5. Ou, Xianhua & Cai, Wenjian & He, Xiongxiong & Zhai, Deqing, 2018. "Experimental investigations on heat and mass transfer performances of a liquid desiccant cooling and dehumidification system," Applied Energy, Elsevier, vol. 220(C), pages 164-175.
    6. 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.

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