Abstract
In china, the building energy consumption accounts for about 30% of the national terminal energy consumption, and the energy used for heating, ventilation and air conditioning has been about 65% of the building energy consumption [1]. The heat transfer through the building envelope is a big part of the building energy consumption. Reducing the heat transfer through the wall and enhancing thermal insulation performance will play an important role in reducing building energy consumption. At the present time, the hollow block wall that is proposed in this study is widely used as the building facade for saving energy, which makes the cold air in summer and hot air in winter flow through the cavity of hollow block in order to carry away the cooling and heat stored in walls. Based on the CFD simulation, the thermal performance of the hollow block ventilated wall is analyzed in this paper, and the effect of cavity size on the heat transfer performance is also studied.
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