3. In a geothermal field, list of parameters are known as below. Calculate heat reserve of this geothermal field using volumetric method. A, area = 8 km2 h, thickness = 200 m Reservoir temperature = 190 C Injection temperature = 80 C rhow, density of water 876 kg/m3 rhor, density of rock = 4600 kg/m3 cw, heat capacity of water = 4440 kJ/kg-C cr, heat capacity of rock = 880 kj/kg-C Porosity = %5 RF, recovery factor = %13 CF, conversion factor = %11 LF, load factor = %97 Project time = 15 years