Steam at 4800 lbf/in.2, 1000 deg F enters the first stage of a supercritical reheat cycle including two turbine stages. The steam exiting the first-stage turbine at 600 lbf/in.2 is reheated at constant pressure to 1000 deg F. Each turbine stage and the pump have an isentropic efficiency of 85%. The condenser pressure is 1 lbf/in.2 If the net power output of the cycle is 100 MW, determine (a) the rate of heat transfer to the working fluid passing through the steam generator, in MW. (b) the rate of heat transfer from the working fluid passing through the condenser, in MW. (c) the cycle thermal efficiency.
Steam at 4800 lbf/in.2, 1000 deg F enters the first stage of a supercritical reheat cycle including two turbine stages. The steam exiting the first-stage turbine at 600 lbf/in.2 is reheated at constant pressure to 1000 deg F. Each turbine stage and the pump have an isentropic efficiency of 85%. The condenser pressure is 1 lbf/in.2 If the net power output of the cycle is 100 MW, determine (a) the rate of heat transfer to the working fluid passing through the steam generator, in MW. (b) the rate of heat transfer from the working fluid passing through the condenser, in MW. (c) the cycle thermal efficiency.
Refrigeration and Air Conditioning Technology (MindTap Course List)
8th Edition
ISBN:9781305578296
Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson
Chapter28: Special Refrigeration Applications
Section: Chapter Questions
Problem 15RQ: Why is two-stage compression popular for extra-low-temperature refrigeration systems?
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Question
Steam at 4800 lbf/in.2, 1000 deg F enters the first stage of a supercritical reheat cycle including two turbine stages. The steam exiting the first-stage turbine at 600 lbf/in.2 is reheated at constant pressure to 1000 deg F. Each turbine stage and the pump have an isentropic efficiency of 85%. The condenser
pressure is 1 lbf/in.2 If the net power output of the cycle is 100 MW, determine
(a) the rate of heat transfer to the working fluid passing
through the steam generator, in MW.
(b) the rate of heat transfer from the working fluid passing
through the condenser, in MW.
(c) the cycle thermal efficiency.
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