ارزيابي اقتصادي پمپهاي حرارتي زمين گرمايي با كويل زميني افقي در ايران

Economic Evaluation of Horizontal Coil Geothermal Heat Pumps in IRAN

In this paper, an economic and feasibility study for geothermal heat pumps has been studied based on the conditions of Iran. Geothermal heat pumps have a higher coefficient of performance in comparison with the air-to-air heat pumps, so it will cause a considerable saving in electricity consumption although they need to a higher initial investment. In this study, the above-mentioned difference in capital cost is being investigated and using economic analyzing methods, payback period is calculated. Economic investigations, show that the payback period is about 6 years. The effect of electricity price, utility time and percentage of annual increase in electricity price, together with the economical performance of system are discussed.