Question
10. Steam at 200 bar, 760C enters the throttle of a re- beater engine and expands to 10 bar. At this point it leaves
10. Steam at 200 bar, 760C enters the throttle of a re- beater engine and expands to 10 bar. At this point it leaves the engine, enters the reheater, and returns at 9 bar, 600C, expansion then occurs to the condenser pressure of 0.05 bar (h, = 138 kJ/kg) on the basis of flow of 1 kg steam. Find (a) W and e of the cycle (b) W, e and m for the ideal engine (c) In the actual engine the steam enters the reheater at 10 bar, 300C and later expands to a saturated state at the exhaust to the condenser, find W, e and m. Ans.: (a) 2226.7 kJ/kg, 48.95%; (b) 2246.7 kJ/kg, 49.17%, 1.6 kg; (c) 2052.1 kJ/kg, 45.85%, 1.75 kg/kwh.
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Thermodynamics An Engineering Approach
Authors: Yunus A. Cengel, Michael A. Boles
8th edition
73398179, 978-0073398174
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