Mechanical Engineering - Compressors, Gas Dynamics and Gas Turbines - Discussion

Discussion Forum : Compressors, Gas Dynamics and Gas Turbines - Section 1 (Q.No. 34)
34.
Intercooling in gas turbines
decreases net output but increases thermal efficiency
increases net output but decreases thermal efficiency
decreases net output and thermal efficiency both
increases net output and thermal efficiency both
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
14 comments Page 1 of 2.

Sai said:   8 years ago
We know that efficiency of the simple gas turbine is.

(Work of turbine - Work of compressor) /Heat supply.

By intercooling,

The work net increases by decreasing the compressor work and automatically Heat supply is also increasing.
So work net and heat supply both are increasing then we can't comment on efficiency.

Nikhil Shevkar said:   1 decade ago
Answer is not correct.

Inter-cooling doesn't increases the efficiency because on intercooling temp of air at combustion chamber decreases than normal brayton cycle so heat needs to be supply more in combustion but intercooling increases output as Wc decreases.

Brij Bhushan said:   1 decade ago
Answer is not correct.

Efficiency decreases because with inter-cooling exit temperature of air decreases, so more heat is required to maintain the maximum temperature. Net output of system increases.

K910 said:   6 years ago
The answer is correct B efficiency Increase when coupled with regenerator or else it decreases due to work supplied in both.

Deepak dixit said:   1 decade ago
Inter cooling only increases the net work output due to reduction in compressor work but decreases the efficiency.

Abhinav bowlay said:   8 years ago
Answer is D since the output is increased in intercooler therefore thermal efficiency increases.

Johirul said:   8 years ago
Intercooling increase in work output but decreases in thermal efficiency.

Prazin said:   8 years ago
The Answer is B. Intercooling decreases the efficiency.

Biplab said:   9 years ago
According to me, the correct answer is B.

Vilu said:   9 years ago
According to me, the answer is B.


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