Experimental investigation and mathematical modelling of the heat and mass transfer processes in a solar chimney

Jiachen Wang, Jinchi Guo, Cui Liu, Yongcai Li and Chunhua Li

Renewable Energy, 2024, vol. 237, issue PA

Abstract: Solar chimney is one of the solar energy-based techniques, and the phenomenon of mass transfer usually occurs in solar chimney, which has not received enough attentions to date. The aim of this paper was to develop a mathematical model of solar chimney considering both heat and mass transfer processes. Both experimental and analytical results indicated that mass transfer has a great influence on the system ventilation performance. Furthermore, the mathematical modelling revealed that the integral mean air temperature was decreased by 18.70 %, while the airflow rate was reduced by 70.40 %, when the area ratio increased from 0.10 to 0.65. Additionally, the airflow disappeared as the area ratio was further increased to 0.70. The airflow rate was increased by 70.70 %, and the integral mean air temperature was increased by 2.50 °C when the relative humidity increased from 10 % to 90 %. The integral mean air temperature was increased by 92.20 %, while the airflow rate was only increased by 1.90 % when the ambient temperature increased from 20 to 40 °C. The study provided a more accurate theoretical approach for the optimal design and prediction of ventilation performance of the solar chimney.

Keywords: Solar chimney; Mass transfer process; Heat transfer process; Mathematical model; Experimental investigation (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:237:y:2024:i:pa:s0960148124016082

DOI: 10.1016/j.renene.2024.121540

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