Effect of Environmental Conditions on Solar Chimney:Exergy and Economic Analysis and Choosing the Appropriate City

In this study, the effects of environmental conditions on solar chimney exergy have been investigated and a strategy has been proposed to select a suitable city for solar chimney utilization. The effect of parameters such as radiation intensity, ambient temperature and ambient humidity on the efficiency of the second law of solar chimney is investigated. Five different cities in Iran (Arak, Ahvaz, Tabriz, Rasht and Kerman) are considered. Then the exergy efficiency over a year is evaluated for all cities. Using the Analytical Hierarchy process and based on exergy efficiency and economic function, the studied cities in Iran have been ranked for installation of solar chimney. The results show that in the exergy analysis, the most effective parameters are radiation intensity, ambient temperature and ambient humidity, respectively. Also, the city of Ahvaz has the highest exergy efficiency during the year compared to other cities. Most of the cost function is related to Tabriz. Ahvaz city is ranked first with 0.3 and Tabriz with 0.16 is the last place to install solar chimney.