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A mathematical model of a solar chimney

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  • Ong, K.S.

Abstract

A simple mathematical model of a solar chimney is proposed. The physical model is similar to the Trombe wall. One side of the chimney is provided with a glass cover which with the other three solid walls of the chimney form a channel through which the heated air could rise and flow by natural convection. Openings provided at the bottom and top of the chimney allow room air to enter and leave the channel. Steady state heat transfer equations were set up to determine the boundary temperatures at the surface of the glass cover, the rear solar heat absorbing wall and the air flow in the channel using a thermal resistance network. The equations were solved using a matrix-inversion solution procedure. The thermal performance of the solar chimney as determined from the glass, wall and air temperatures, air mass flow rate and instantaneous heat collection efficiency of the chimney are presented. Satisfactory correlation was obtained with experimental data from other investigators. Further experimental investigation is currently under way.

Suggested Citation

  • Ong, K.S., 2003. "A mathematical model of a solar chimney," Renewable Energy, Elsevier, vol. 28(7), pages 1047-1060.
    • Handle: RePEc:eee:renene:v:28:y:2003:i:7:p:1047-1060
    DOI: 10.1016/S0960-1481(02)00057-5
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    References listed on IDEAS

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    1. Hirunlabh, J & Kongduang, W & Namprakai, P & Khedari, J, 1999. "Study of natural ventilation of houses by a metallic solar wall under tropical climate," Renewable Energy, Elsevier, vol. 18(1), pages 109-119.
    2. AboulNaga, M.M & Abdrabboh, S.N, 2000. "Improving night ventilation into low-rise buildings in hot-arid climates exploring a combined wall–roof solar chimney," Renewable Energy, Elsevier, vol. 19(1), pages 47-54.
    3. Hamdy, I.F. & Fikry, M.A., 1998. "Passive solar ventilation," Renewable Energy, Elsevier, vol. 14(1), pages 381-386.
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