Study of the heat ventilation with inclined chimney in the attic

Abstract

This paper proposes the design of inclined chimney with horizontal outlets that integrated with a triangular roof. Utilize solar radiation to heat and induce air through natural ventilation in the interior of the house. For achieving this goal, Solidworks Flow Simulation software is used to visualize and simulate the 3-D flow plane performance of the chimney, by modeling using Navier-Stokes (RANS) for numerical investigations. The effect of depth the channel of solar chimney investigated in six configurations under the roof with a slope of 45°. The simulation is performed on steady-state, to predict the dynamics of heat transfer, velocity distribution, and mass flow rate. The results showed that the greater the depth of the chimney, the higher the airflow and quite effective in reducing the temperature of the interior space, but would result in a decrease in heat in the solar chimney channel. Solar chimney airflow is mainly caused by buoyancy due to differences between ambient temperature and in the channel. They confirmed that the more significant the difference in temperature inside and the environment, the more efficient the performance of ventilation. However, the triangle channel output is still a place to collect hot air and high airflow. Natural ventilation using a solar chimney in the roof cavity seems to be effectively applicable to solar incidence discharges in traditional homes in the Indonesian climate.