Steam is delivered by a boiler at 1000 psia and 900 F to a turbine. After expansion in the turbine to 300 psia, the steam is withdrawn and reheated to the initial temperature. The expansion now occurs to the condenser pressure of 1psia. The turbine efficiency is 80% and the generator efficiency is 90%. The stoker fired boiler with 60% efficiency uses coal with the ultimate analysis below: C-69 %, H-4.5 %, O₂-6.5 %, N₂- 2%, S = 3 %, A = 11%, Moisture = 4% The amount of air supplied is 126,000 ft³/min at 60 F, 14.7 psia with 25% excess air. Determine a) The power output of the turbine, kw b) The cycle thermal efficiency. % c) The cogeneration efficiency if 90% of the exhaust heat is used as process heating. % d) The combined heat rate, Btu/kW-hr

Steam is delivered by a boiler at 1000 psia and 900 F to a turbine. After expansion in the turbine to 300 psia, the steam is withdrawn and reheated to the initial temperature. The expansion now occurs to the condenser pressure of 1psia. The turbine efficiency is 80% and the generator efficiency is 90%. The stoker fired boiler with 60% efficiency uses coal with the ultimate analysis below: C-69 %, H-4.5 %, O₂-6.5 %, N₂- 2%, S = 3 %, A = 11%, Moisture = 4% The amount of air supplied is 126,000 ft³/min at 60 F, 14.7 psia with 25% excess air. Determine a) The power output of the turbine, kw b) The cycle thermal efficiency. % c) The cogeneration efficiency if 90% of the exhaust heat is used as process heating. % d) The combined heat rate, Btu/kW-hr

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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