81. An 18,000 kW geothermal plant has a generator efficiency of 90% and 80% respectively. If 

the quality after throttling is 20% and each well discharges 400,000 kg/hr, determine the 

number of wells required to produce if the change of enthalpy at entrance and exit of turbine is 

500 kJ/kg.

A. 4 wells B. 2 wells C. 6 wells D. 8 wells