An ideal incomplete-expansion cycle uses steam generated at 1.85 MPa. Release condition is dry and saturated. Exhaust steam is at 0.03 MPa and has 10.58% quality. The actual engine uses 1000 kg/h of steam. The brake engine efficiency is 60% and the mechanical efficiency is 85%. (a) for the ideal engine, calculate the thermal efficiency and mep. For the actual engine, calculate (b) the brake power in kW and the brake thermal efficiency, (c) the indicated thermal efficiency and the indicated heat rate (d) the approximate enthalpy of the exhaust steam at 0.03 MPa assuming that the heat loss from the engine is 23 kJ per kg of steam.
An ideal incomplete-expansion cycle uses steam generated at 1.85 MPa. Release condition is dry and saturated. Exhaust steam is at 0.03 MPa and has 10.58% quality. The actual engine uses 1000 kg/h of steam. The brake engine efficiency is 60% and the mechanical efficiency is 85%. (a) for the ideal engine, calculate the thermal efficiency and mep. For the actual engine, calculate (b) the brake power in kW and the brake thermal efficiency, (c) the indicated thermal efficiency and the indicated heat rate (d) the approximate enthalpy of the exhaust steam at 0.03 MPa assuming that the heat loss from the engine is 23 kJ per kg of steam.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:An ideal incomplete-expansion cycle uses steam generated at 1.85 MPa. Release condition is
dry and saturated. Exhaust steam is at 0.03 MPa and has 10.58% quality. The actual engine uses 1000
kg/h of steam. The brake engine efficiency is 60% and the mechanical efficiency is 85%. (a) for the
ideal engine, calculate the thermal efficiency and mep. For the actual engine, calculate (b) the brake
power in kW and the brake thermal efficiency, (c) the indicated thermal efficiency and the indicated
heat rate (d) the approximate enthalpy of the exhaust steam at 0.03 MPa assuming that the heat loss
from the engine is 23 kJ per kg of steam.
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