Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines - Discussion
Discussion Forum : Compressors, Gas Dynamics and Gas Turbines - Section 2 (Q.No. 2)
2.
Reheating in a gas turbine
Discussion:
23 comments Page 1 of 3.
Ashish Patel said:
6 years ago
Reheating is applied in a gas turbine in such a way that it increases the turbine work without increasing the compressor work or melting the turbine materials. When a gas turbine plant has a high pressure and low pressure turbine a reheater can be applied successfully. Reheating can improve efficiency up to 3%.
A reheater is generally is a combustor which reheats the flow between the high and low-pressure turbines.
A reheater is generally is a combustor which reheats the flow between the high and low-pressure turbines.
Sneha Nair said:
7 years ago
The answer is CD.
Increases turbine work output.
Decreases thermal efficiency.
Q in increases. Work also increases. But the increase in Qin is more than Work So thermal efficiency decreases.
Increases turbine work output.
Decreases thermal efficiency.
Q in increases. Work also increases. But the increase in Qin is more than Work So thermal efficiency decreases.
Rakesh said:
1 decade ago
Reheating increases turbine work but at the same time there is increase in the heat supplied so it is tough to say the effect on thermal efficiency. But turbine work obviously increases.
Vipul kumar said:
8 years ago
Only reheating increases turbine work but also decrease efficiency, a combination of regeneration and reheating increases both turbine work and efficiency.
Gaurav said:
1 decade ago
Wrong, reheating increases the mean temperature of heat rejection thus decreases thermal efficiency and increases specific work output.
Jitesh said:
6 years ago
@shubham.
It is true it increases turbine work but efficiency, ay increase or decrease it depends on the amount of reheat.
It is true it increases turbine work but efficiency, ay increase or decrease it depends on the amount of reheat.
A.jay said:
8 years ago
It increases Turbine Work always.
And efficiency may increase or decrease depending on mean temp. Of heat addition.
And efficiency may increase or decrease depending on mean temp. Of heat addition.
Ganesh said:
9 years ago
Answer C it causes the increase in temperature which causes a turbine to melt and increase in work done.
Shubham said:
7 years ago
Reheating results in a decrease in thermal efficiency but increases specific work output.
Ravi said:
8 years ago
Reheating and intercooler increases work, regenerator increases thermal efficiency.
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