Q77
Work ratio of a gas turbine may be improved by
A.
Decreasing the compression work
B.
Increasing the compression work
C.
Increasing the turbine work
D.
Both (A) and (C) above
AnswerAnswer: Option D
Solution
Answer: Option D
Solution:
-Increase the turbine inlet temperature provided the turbine materials can stand the temperature or one has access to replacement parts that can withstand the temperatures.
-Increase the pressure ratio. There is a limit to the efficiency increase depending upon the turbine inlet temperature. One can concievably increase the pressure ratio to a point that the increased work is never recovered because the expansion across the turbine is inadequate to recover the work.
- Power augmentation through steam injection.
-On turbines with HP and LP turbine separated, apply reheat.