FEASIBILITY STUDY OF DIRECT APPLICATION OF TWO DEEP AND DRY GEOTHERMAL WELLS FOR HEATING THE BUILDINGS OF MOEIL VILLAGE

Direct application of geothermal energy means that geothermal energy is no longer converted to electrical energy. In the direct application, Fluids are used at low to medium temperatures (150-50 ° C). With water drilling equipment, the fluids of these reservoirs can also be exploited. At present study, two wells of the Sabalan Power Plant of Meshginshahr, namely NWS-3 and NWS-11RD, were studied in terms of heat supply of the Moeil Village. The drilling results of the two wells indicated that the output temperature for NWS-3 and NWS-11RD wells was 40 and 42◦C respectively, the output pressure for NWS-3 and NWS-11RD wells was 3 atm and the flow rate for two NWS wells-3 and NWS-11RD was 1.2 and 5 lit/s respectively. In order to provide heating the buildings of the Moeil Village, it was not possible to exploit the wells directly with this fluid. For this purpose, four methods were investigated using a geothermal heat pump and river water, which the best method was to increase the flow rate of NWS11 to 10 times using the heat pump, resulted in heating of 300 buildings with a thermal capacity of 7 kW or 24 000 BTU/h. Of course, if the thermal capacity of the buildings is reduced due to reduced area of the infrastructure or the use of building insulations, the number of buildings heated by them will be increased.