The Study on Optimum Design and Performance Analysis of Chimney for Ventilation Space

Abstract

The most energy consumption is in the building industry, about 40%, and the major part of which is spent for cooling, heating and ventilation. Therefore, using suitable measures to reduce energy consumption has a great influence on energy balance of building. One of the passive design methods is using a solar chimney as a mechanical eco concept which is a simple idea to increase natural ventilation in surrounding spaces. Solar chimney can be used vertically or in the angle of horizon. The inclination angle of solar chimney influences the ventilation rate efficiency. In the present study, the effect of solar chimney on ventilation rate has been examined in four cities of Iran with different climates. Due to lack of access to the implemented samples, the computerized simulation was used as alternative method for field studies, the results of which by energy plus software in four cities of different climates show that the optimum angle of inclination is 45° so that the maximum ventilation is obtained. The vertical position of chimney provides the minimum ventilation rate in all cities except in Tabriz (cold climate) Keywords: Solar power, Chimney, heating, ventilate, passive element, cooling.