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For an ideal gas-turbine cycle with two stages of compression and two stages of expansion, the...

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Mechanical Engineering

For an ideal gas-turbine cycle with two stages of compressionand two stages of expansion, the pressure ratio across each stageof the compressor and turbine is 3. The air enters each stage ofthe compressor at 300 K and each stage of the turbine at 1200K.Using variable specific heats, determine the back work ratio andthe thermal efficiency of the cycle, assuming

(a)no regenerator is used,

(b)a regenerator with 75% effectiveness is used.

Answer & Explanation Solved by verified expert
4.5 Ratings (665 Votes)
AWork done in the first compressor whereT1 inlet temp of compressor 1 300 KT2 outlet temp of compressor 2 PR pressure ratio across compressor 1 3 14 for airCp1 specific heat at constant pressure at compressor inlet 1007 kJkgKCp2 specific heat at constant pressure at compressor outlet 1013 kJkgKWork done by the second compressor Work done by the firstcompressor 11386 kJkgTotal    See Answer
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