Steam is delivered by a steam generating unit at 1100 psia and 900 F. After expansion in the turbine to 300 psia, the steam is withdrawn and reheated to the initial temperature. Expansion now occurs to the condenser pressure of 1psia. Find: a. For an ideal engine operating through the same states, but ignoring the pressure drop in the reheater, find the work and engine efficiency. b. An actual turbine operates between these same state points except that steam enters the reheater at 300 psia, 600 F and leaves at 290 psia, 900 F. The combined steam rate is 6.3 lb/ HP-hr, the generator efficiency is 94%, and the heat loss through the turbine casing is 1% of the throttle enthalpy. Find the turbine efficiency and the approximate quality or degree SH of the exhaust steam.
Steam is delivered by a steam generating unit at 1100 psia and 900 F. After expansion in the turbine to 300 psia, the steam is withdrawn and reheated to the initial temperature. Expansion now occurs to the condenser pressure of 1psia. Find: a. For an ideal engine operating through the same states, but ignoring the pressure drop in the reheater, find the work and engine efficiency. b. An actual turbine operates between these same state points except that steam enters the reheater at 300 psia, 600 F and leaves at 290 psia, 900 F. The combined steam rate is 6.3 lb/ HP-hr, the generator efficiency is 94%, and the heat loss through the turbine casing is 1% of the throttle enthalpy. Find the turbine efficiency and the approximate quality or degree SH of the exhaust 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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Steam is delivered by a steam generating unit at 1100 psia and 900 F. After expansion in the turbine to 300 psia, the steam is withdrawn and reheated to the initial temperature. Expansion now occurs to the condenser pressure of 1psia. Find:
a. For an ideal engine operating through the same states, but ignoring the pressure drop in the reheater, find the work and engine efficiency.
b. An actual turbine operates between these same state points except that steam enters the reheater at 300 psia, 600 F and leaves at 290 psia, 900 F. The combined steam rate is 6.3 lb/ HP-hr, the generator efficiency is 94%, and the heat loss through the turbine casing is 1% of the throttle enthalpy. Find the turbine efficiency and the approximate quality or degree SH of the exhaust steam.
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