Geothermal steam is planned as an energy source for power generation. The steam enters and adiabatic exchanger at 2 bars and 65 percent quality, and condenses to a saturated liquid before exiting. The working fluid takes this energy for the heat engine. Groundwater at 15 degrees C is to be used as the cold reservoir, and the heat engine is to generate 3.70 kW. If the mass flow rate of steam is 50 kg/h, determine:
a) the rate at which heat is removed from the steam, in kJ/h
b) the rate of heat rejection to the cold reservoir, in kJ/h
c) the thermal efficiency.