Discussion
In a gas turbine, the turbine output is 600 kJ/kg, the compressor work is 400 kJ/kg and the heat supplied is 1000 kJ/kg. The thermal efficiency of this cycle is:
Answer: A
The thermal efficiency is 20%.
The net work is the turbine output minus the compressor work, and efficiency is net work over heat supplied.
\[ \begin{aligned} W_{net} &= 600 - 400 = 200\ \text{kJ/kg} \\ \eta &= \frac{200}{1000} = 20\% \end{aligned} \]
60% uses the turbine output alone and 40% the compressor work alone, forgetting that the compressor is driven by the turbine.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development