A geothermal power plant uses geothermal water extracted at 150°C at a rate of 210 kg/s as the heat source and produces 8000 kW of net power. The geothermal water leaves the plant at 90°C.
If the environment temperature is 25°C, determine
(a) the actual thermal efficiency,
(b) the maximum possible thermal efficiency,
(c) the actual rate of heat rejection from this power plant.