EXAMPLE 9 Steam is generated in the boiler of a cogeneration plant at 10 MPa and 450°C at a steady rate of 5 kg/s. In normal operation, steam expands in a turbine to a pressure of 0.5 MPa and is then routed to the process heater, where it supplies the process heat. Steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. In this mode, no steam passes through the condenser, which operates at 20 kPa. (a) Determine the power produced and the rate at which process heat is supplied in this mode. (b) Determine the power produced and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure.
EXAMPLE 9 Steam is generated in the boiler of a cogeneration plant at 10 MPa and 450°C at a steady rate of 5 kg/s. In normal operation, steam expands in a turbine to a pressure of 0.5 MPa and is then routed to the process heater, where it supplies the process heat. Steam leaves the process heater as a saturated liquid and is pumped to the boiler pressure. In this mode, no steam passes through the condenser, which operates at 20 kPa. (a) Determine the power produced and the rate at which process heat is supplied in this mode. (b) Determine the power produced and the rate of process heat supplied if only 60 percent of the steam is routed to the process heater and the remainder is expanded to the condenser pressure.
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:EXAMPLE 9
Steam is generated in the boiler of a cogeneration plant at 10 MPa and
450°C at a steady rate of 5 kg/s. In normal operation, steam expands in a
turbine to a pressure of 0.5 MPa and is then routed to the process heater,
where it supplies the process heat. Steam leaves the process heater as a
saturated liquid and is pumped to the boiler pressure. In this mode, no steam
passes through the condenser, which operates at 20 kPa.
(a) Determine the power produced and the rate at which process heat is
supplied in this mode.
(b) Determine the power produced and the rate of process heat supplied if
only 60 percent of the steam is routed to the process heater and the
remainder is expanded to the condenser pressure.
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