Using Passive cooling technology in hot climate cities of Iran to reduce energy consumption

In recent years, using of air-conditioning devices at summer season has been increased considerablyspecially in cities that are located in hot climate regions. Most of big cities of Iran are in hot and dry climate area, soutilizing of air conditioning system has been growth noticeably in last decay. According to scientific collected data,consumption of electricity in an average apartment is around 35% of total electricity consumption. Also theconsumption of electricity in hot season is two times greater than cold season. So, it is clear that using airconditioningand cooling systems is the main reason of this great amount of energy consumption and near 30% ofenergy use in air-conditioning systems. Considering of this subject, efforts to decrease saving electricity in these bigcities is an important national issue. In this paper regarding to applications of passive energy technology inresidential or office buildings, new methods have been investigated to improve new buildings in these cities. Afterinvestigation of these innovative methods for using passive energy in cooling and air-condition system, two methodshas been collected that are suitable for big cities of Iran which are located in hot climate regions. Using advance cooltower in buildings and passive radiative cooling are two appropriate methods for very effective summer coolingstrategies and effect of these methods on energy management in these cities has been study analytically.Key words: passive cooling, electricity, sustainable methods