As the TTD decreases the size of the feedwater heater Select

As the TTD decreases, the size of the feedwater heater

Select one:

a. Remains unaffected

b. Increases

c. Decreases

Solution

TTD means terminal temperature difference.It is defined as the difference between the temperature at which steam is extracted and feed water heater outlet temperature.If this difference is more more heat loss taking place from the system, and this not at all good in efficiency point of view.If this difference is less, the heat loss is less and the useful heat is more.As the TTD decreases, it inturns increases the size of the feedwater heater.

correct option is B