Feasibility of Economic and Environmental Study of Tehran Residential Building's Hot Water Supply Using Solar Energy

Subject Areas :

Hossein Yousefi ¹ , Soheil Roumi ² , Younes Noorollahi ³

1 - Ph.D., Faculty of New Science and Technologies, University of Tehran
2 - Graduate Student, Energy System Engineering, University of Tehran
3 - Ph.D., Faculty of New Science and Technologies, University of Tehran

Received: 2015-10-18 Accepted : 2016-05-31 Published : 2018-08-23

Keywords: Solar Energy, Tehran, The Environment, Feasibility of Economic and Environmental,

Abstract :

In this study, inflation and time value has been taken into account for the economic investigation of the period of return on investment in replacing natural gas water heaters in Tehran residential buildings. First, the economic analysis was calculated considering all replacing cost by the residents. Second, the calculation was done if the government through the Ministry of Energy pays for all replacing cost. After reviewing various strategic of replacing natural gas boilers with solar water heaters considering the importance of economic and environmental subjects, replacing by citizens because of the financial problems and a long period of return on investment (11.2 years) is impossible.  On the other hand, due to reduction of air pollution and greenhouse gas emissions, especially CO2 which is calculated around 2.7 million ton per year, and the country's ability to exporting natural gas to neighboring countries, the strategy of subsidize of replacing by the Ministry of Energy has a return on investment (around 2 years) is much more reasonable.

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