Technical-Environmental Economical Feasibility Study of Geothermal Heat Pumps

Subject Areas : environmental management

Farideh Atabi ^{1 *} , Seyed Mohammad Reza Heibati ² , Setareh Mehrkhou ³

1 - Assistant Prof., Faculty of Energy and the Environment, Science & Research Campus, Islamic Azad University, Tehran, Iran.
2 - Assistant Prof. Islamic Azad University, Pardis Branch, Iran
3 - M.Sc, Faculty of Energy and Environment, Science & Research Campus, Islamic Azad University, Tehran, Iran.

Received: 2009-05-05 Accepted : 2009-08-06 Published : 2014-12-22

Keywords: heat pump, geothermal, carbon credit, technical-environmental econom,

Abstract :

AbstractConsidering the scarcity of natural fossil energy and dispersion of pollutant gases from their products,it seems utilizing cheaper and cleaner energy sources such as geothermal energy are vital.One of the applications of geothermal energy is geothermal pumps. The compressor of geothermalpumps utilizes the thermal energy of the earth to provide thermal load and hot water for the buildingsby consuming electricity. There are two most common geothermal heat pumps including a systemwith vertical and horizontal ground heat exchanger.In the present study, in ventilation calculations, the required thermal load of a typical four-story 12-unit residential building located in the East of Tehran was calculated separately based on the actualoperational data. Each story has an area of 565 square meters. According to the thermal properties ofsoil and the annual average temperature of the abovementioned area, the appropriate geothermal heatpump was selected. Subsequently, three scenarios were created through Perform software on the basisof the primary costs of purchase and installment of geothermal heat pump and its electricityconsumption. The cost-effectiveness of the studied system with that of the previous one was comparedtechnically, economically and environmentally on the basis of carbon credit costs in the world market.The results of this study indicate that the application of geothermal heat pumps decreases the totalemission of pollutants across implementing the project by 3759 tons of CO2 equivalent. Furthermore,67,000 giga joules of natural gas will be saved at the end of the project.

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وزارت نیرو- معاونت امورانرژی، 1386، ترازنامه انرژی، سازمان بهره وری انرژی ایران