of water entering at 250°F, 140 lb/in.² and exiting as saturated vapor at 14 20 lb/h. Let To-70°F. Po-14.7 lb/in.²

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
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In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb/in.², 700°F, and a condenser pressure of
180 lb/in.² The isentropic turbine efficiency is 90%. Energy rejected by the condensing steam is transferred to a separate process
stream of water entering at 250°F, 140 lb/in.2 and exiting as saturated vapor at 140 lb/in.2 The mass flow rate of the process stream
is 48,000 lb/h. Let To -70°F, po - 14.7 lb//in.²
Step 1
Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h.
mcycle
Step 2
Hint
W
Your answer is correct.
cycle
= 54852.5
Determine the net power output for the cycle, in Btu/h.
Hint
Step 3
Your answer is correct.
7087421.984
€ = i
lb/h
eTextbook and Media
Save for Later
Btu/h
Evaluate an exergetic efficiency for the overall cogeneration system. The exergetic efficiency is defined as the net rate of exergy
output divided by the net rate of exergy input.
Attempts: 1 of 4 used
%
Attempts: 2 of 4 used
Attempts: 0 of 4 used Submit Answer
Transcribed Image Text:In a cogeneration system, a Rankine cycle operates with steam entering the turbine at 800 lb/in.², 700°F, and a condenser pressure of 180 lb/in.² The isentropic turbine efficiency is 90%. Energy rejected by the condensing steam is transferred to a separate process stream of water entering at 250°F, 140 lb/in.2 and exiting as saturated vapor at 140 lb/in.2 The mass flow rate of the process stream is 48,000 lb/h. Let To -70°F, po - 14.7 lb//in.² Step 1 Determine the mass flow rate for the working fluid of the Rankine cycle, in lb/h. mcycle Step 2 Hint W Your answer is correct. cycle = 54852.5 Determine the net power output for the cycle, in Btu/h. Hint Step 3 Your answer is correct. 7087421.984 € = i lb/h eTextbook and Media Save for Later Btu/h Evaluate an exergetic efficiency for the overall cogeneration system. The exergetic efficiency is defined as the net rate of exergy output divided by the net rate of exergy input. Attempts: 1 of 4 used % Attempts: 2 of 4 used Attempts: 0 of 4 used Submit Answer
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