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Numerical study of the optimum width of 2a diurnal double air-channel solar chimney

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  • Zavala-Guillén, I.
  • Xamán, J.
  • Hernández-Pérez, I.
  • Hernández-Lopéz, I.
  • Gijón-Rivera, M.
  • Chávez, Y.

Abstract

A conjugate heat transfer analysis of a double air channel solar chimney (SC-DC) aiming to determine the configuration that maximizes the mass flow rate of the system is presented. The design modifications consisted on two geometrical parameters: 1) the separation between the absorber wall and the glass covers that form the air channels (b), and 2) the height of the system (L). A code based on the Finite Volume Method was developed and a k-ω turbulence model was used to model air turbulence in the SC-DC. The code was validated and it showed a good agreement with experimental data reported in the literature. We found that the optimal configuration of the SC-DC under the considered conditions is L = 2 m and b = 0.125 m. The optimum L of the SC-DC is similar to the value reported for a conventional chimney, whereas the optimum b is smaller than the one of a conventional chimney. The optimal configuration of the SC-DC had a thermal efficiency of 38.5% and a mass flow rate of 0.1072 kg/s when it receives a beam solar radiation of 700 W/m2 and a diffuse solar radiation of 100 W/m2.

Suggested Citation

  • Zavala-Guillén, I. & Xamán, J. & Hernández-Pérez, I. & Hernández-Lopéz, I. & Gijón-Rivera, M. & Chávez, Y., 2018. "Numerical study of the optimum width of 2a diurnal double air-channel solar chimney," Energy, Elsevier, vol. 147(C), pages 403-417.
    • Handle: RePEc:eee:energy:v:147:y:2018:i:c:p:403-417
    DOI: 10.1016/j.energy.2017.12.147
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    References listed on IDEAS

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    1. Vargas-López, R. & Xamán, J. & Hernández-Pérez, I. & Arce, J. & Zavala-Guillén, I. & Jiménez, M.J. & Heras, M.R., 2019. "Mathematical models of solar chimneys with a phase change material for ventilation of buildings: A review using global energy balance," Energy, Elsevier, vol. 170(C), pages 683-708.
    2. Xamán, J. & Vargas-López, R. & Gijón-Rivera, M. & Zavala-Guillén, I. & Jiménez, M.J. & Arce, J., 2019. "Transient thermal analysis of a solar chimney for buildings with three different types of absorbing materials: Copper plate/PCM/concrete wall," Renewable Energy, Elsevier, vol. 136(C), pages 139-158.
    3. Zhang, Haihua & Yang, Dong & Tam, Vivian W.Y. & Tao, Yao & Zhang, Guomin & Setunge, Sujeeva & Shi, Long, 2021. "A critical review of combined natural ventilation techniques in sustainable buildings," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
    4. Chen, Wei & Chen, Wei, 2020. "Analysis of heat transfer and flow in the solar chimney with the sieve-plate thermal storage beds packed with phase change capsules," Renewable Energy, Elsevier, vol. 157(C), pages 491-501.
    5. Ke, Wei & Ji, Jie & Xu, Lijie & Yu, Bendong & Tian, Xinyi & Wang, Jun, 2021. "Numerical study and experimental validation of a multi-functional dual-air-channel solar wall system with PCM," Energy, Elsevier, vol. 227(C).
    6. Shi, Long, 2019. "Impacts of wind on solar chimney performance in a building," Energy, Elsevier, vol. 185(C), pages 55-67.

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