A power plant operating with the rankine cycle is established to obtain electrical energy from a geothermal well. It is known that the maximum temperature that geothermal water can reach is 380 C. It is accepted that the efficiency of the geothermal boiler providing heat to the cycle is 100% (ideal), and the isentropic efficiency of the turbine and pump is 87%. At the turbine inlet, the steam will be saturated steam and the outlet pressure will be 150 kPa. Since the net power obtained from this facility is 3 MW;

a) Draw the operating diagram of the facility.

b) Show the cycle in the T-S diagram.

c) Find the thermal efficiency of the plant.

d) Find the steam rate used in the facility.

 

In the facility at the first question, an efficiency increase study will be carried out with a closed type reheater by taking steam from 70% of the turbine inlet pressure. Since 15% of the steam is drawn as intermediate steam;

 

a) Draw the operating diagram of the facility.

b) Show the cycle in the T-S diagram.

c) Find the thermal efficiency of the plant.

d) Find the net power output.