Advances in Vol. 2, No. 2, p. 190-209, 2018 Geo-Energy Research www.astp-agr.com Original article Energy, exergy, and economic analysis of a geothermal power plant Hamid Kazemi1,M:A: Ehyaei2* 1Department of Mechanical Engineering, South-Tehran Branch, Islamic Azad University, Tehran, Iran 2Department of Mechanical Engineering, Pardis Branch, Islamic Azad University, Pardis New City, Iran (Received January 1, 2018; revised April 3, 2018; accepted April 4, 2018; available online April 10, 2018) Citation: Abstract: Kazemi, H., Ehyaei, M.A. Energy, exergy, The current study aimed at designing a geothermal power plant in the Nonal area in and economic analysis of a geothermal Damavand district for simultaneous generation of thermal energy the electric power in power plant. Advances in Geo-Energy the network of Damavand City and a part of Tehran province, the organic working fluid Research, 2018, 2(2): 190-209, doi: for the above cycle is R245fa which is a non-flammable fluid of dry type. The values of energy efficiency, exergy, the net rate of entropy change, and the specific output power 10.26804/ager.2018.02.07. were calculated as 18.2%, 21.3%, 172.97 kW/K, and 31.43 kJ/kg, respectively. The cost Corresponding author: of drilling a well, as well as designing and construction of Damavand’s geothermal power *E-mail:
[email protected] plant, were calculated to be 4.2 and 521.5 million (USD), respectively. Also, the cost per generation of each kW/h of power in Damavand power plant was 17 cents. The estimated Keywords: payback time is calculated as 15 years.