SET Proceedings 2978-4387 Caravel Press 10.65582/set.2005.006 2005.006 Numerical Study the Performance of Solar Wall System LiYanfeng WangXuemei HanXiaoxue HuangHuairong CaiNa College of Architecture and Civil Engineering, Beijing University of Technology, Beijing, China 23092005 4 1 978-7-112-07718-2 26 31 23 September 2005 © 2005 Copyright WSSET 2005

A mathematical model for simulating airflow in solar channel of the insulated Trombe solar wall system is proposed. It is assumed the glazing is isothermal and the solar heat absorbed by the wall is transferred to the air in the channel with a constant flux by natural convection. The mass, momentum and energy conservation equations are discretized and solved using the finite difference control volume method. An experimental study of solar chimney was used to validate the proposed mathematical model. A good agreement is found between the predicted results of airflow rate and those of measurement in the different conditions. Flow and temperature fields are produced and the results are presented in terms of temperature and velocity distribution in various parts of system. The results show that the solar heat gain and channel width are two important parameters affecting the air flow pattern and heat transfer. Further experimental work is needed to refine the model.

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