University of Tehran Journal of Solar Energy Research 2588-3097 4 4 2019 10 01 Energy Payback Time and Environmental Assessment on a 7 MW Photovoltaic Power Plant in Hamedan Province, Iran 280 286 74671 10.22059/jser.2020.292813.1132 EN Amir Hossein Shiravi Department of Mechanical Engineering, Jundi-Shapur University of Technology, Dezful, Iran 0000-0002-4862-0319 Mohammad Firoozzadeh Department of Mechanical Engineering, Faculty of Mechanical Engineering, Jundi-Shapur University of Technology, Dezful, Iran 0000-0001-7069-8879 Journal Article 2019 11 24 Nowadays, environmental protection and efforts to reduce pollution, caused by industrial activities, on one hand, and research on finding new and improved energy supply options on the other, have become one of the major concerns of governments around the world. In recent years, photovoltaic (PV) systems, due to their proved potential are rapidly developed in most parts of the earth. The objective of this study, is to estimate the amount of CO2 emission reduction by implementing a 7 MW PV power plant. The location of this power plant is in the north of Hamedan province, Iran. Moreover, the amount of not consumed fossil fuel were measured. Finally, it is found that the total reduction of 134050 t CO2 will be achieved when PV power plant is used compared to a natural gas one, during 25 years. Moreover, in this paper, the energy payback time (EPBT) and the Energy Yield Ratio (EYR) are calculated. The results show that EPBT is about 5.5 years and EYR of mentioned PV power plant is more than 4.2. https://jser.ut.ac.ir/article_74671_d8c024f21fc502a93ba71c6e05e3122b.pdf