As the number of regenerative feedwater heaters increase for

As the number of regenerative feedwater heaters increase, for the same turbine output the heat rate will
Select one:
a. Not change
b. Increase[
c. Decrease

Solution

heat rate=(3600/efficinecy) (kJ/kW hr)

As the number of regenarative feed waters increases, efficiency increases.But it is not economical increase more number of feed water heaters because, as the number of feed waters increases, the gain in efficiency(efficiency difference between the system with one feed water heater to system with two feed water heaters) is decreases.

If the efficiency increases, heat rate will obviously decreases.

Therefore the answer is C