A power plant has a turbogenerator, operating at steady state with an input shaft rotating at 1800 RPM with a torque of 16,700 N-m. The turbogenerator produces current at 230 amp with a voltage of 13,000 V. The rate of heat transfer between the turbogenerator and its surroundings is related to the surface temperature Tp and the lower ambient temperature To and is given by Q = - h A (Tb - To), where h = 100 W/m2.K, A = 25 m2, and To = %3D 298 K. (a) [10] Determine the temperature Tp, in K. (b) [10] For the turbogenerator as the system, determine the rate of entropy production, in kW/K.

A power plant has a turbogenerator, operating at steady state with an input shaft rotating at 1800 RPM with a torque of 16,700 N-m. The turbogenerator produces current at 230 amp with a voltage of 13,000 V. The rate of heat transfer between the turbogenerator and its surroundings is related to the surface temperature Tp and the lower ambient temperature To and is given by Q = - h A (Tb - To), where h = 100 W/m2.K, A = 25 m2, and To = %3D 298 K. (a) [10] Determine the temperature Tp, in K. (b) [10] For the turbogenerator as the system, determine the rate of entropy production, in kW/K.

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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Question

submission process.
A power plant has a turbogenerator, operating at steady
state with an input shaft rotating at 1800 RPM with a
torque of 16,700 N m. The turbogenerator produces
current at 230 amp with a voltage of 13,000 V. The rate of
heat transfer between the turbogenerator and its
surroundings is related to the surface temperature Tp and
the lower ambient temperature To and is given by Q = - h
A (Tb - To), where h = 100 W/m2.K, A = 25 m2, and To =
298 K.
(a) [10] Determine the temperature Tb, in K.
(b) [10] For the turbogenerator as the system, determine
the rate of entropy production, in kW/K.
Turbine
Turbogenerator
Turbogenerator
input shaft
Steam inlet
Electricity
i = 230 amp
Voltage = 13,000 V
w = 1800 RPM
Torque = 16,700 N-m
Steam exit

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