TFS · Energy & Power System Applications · Problem 6PDFSolution in PDF ↓
TFS · Energy & Power System Applications · Problem 6
Problem & Solution
Video Synthesis
- Problem: 70 degree atmospheric air enters the compressor of an air-standard gas turbine and is compressed at a 4-to-1 ratio.
- Key values: 75 %, 85 %
- Reference: reference handbook
- Result: He's going to be P4 over P3 raised to the K minus 1 over K and now T 3 needs to be in rank in so that's 1200 plus 460 is 1660 and now that's being mul...
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Student questions asked in live office hours about this problem
OH 35
Q: Why is the pressure ratio P4/P3 equal to 0.25 instead of 4 in a gas turbine problem?
A: The compressor increases pressure by a ratio of 4 (P2/P1 = 4), and the turbine then expands back to atmospheric pressure, so it reduces pressure by the same factor. Therefore, P4/P3 = 1/4 = 0.25, which is the reciprocal of the compressor's pressure ratio.