Impact of angle of solar chimney inclination on natural ventilation – A study based on CFD.

Energy saving is a vital method to protect the environment. To cut down the energy usage, a lot of research has been conducted to achieve that target. The solar chimney is one of the renewable energy systems to cool the building based on solar energy. Many factors affect its performance such as solar radiation, the vertical height of the chimney, cavity gap, inlet and outlet size, etc... Nevertheless, the factors that strongly influence the rate of ventilation are solar intensity, the vertical height of the solar chimney. This paper investigated the influence of solar chimney inclination angle using Autodesk CFD. The models with different angles of 30°, 45°, 60°, 75° and 90°, the inlet dimension of 1000mm × 100mm and 2000mm length were developed by Inventor 2018. This study was carried out under the condition at 2:00 pm from January to December, facing South, in Ho Chi Minh city. The results show that the tilted angle of 60° is the best choice because of its high flow rate and steady. However, the flow rate of 45o angle is higher than that of 75° angle from April to August and an average of 5% lower than that of 60° angle in this time. Therefore, the tilted angle of 45° can be another choice for ventilation in summer. [ABSTRACT FROM AUTHOR]