The figure below shows a vapor power cycle that provides process heat and produces power. The steam generator produces vapor at 500 lbf/in.², 800°F, at a rate of 8 x 105 lb/h. Seventy percent of the steam expands through the turbine to 10 lbf/in.² and the remainder is directed to the heat exchanger. Saturated liquid exits the heat exchanger at 500 lbf/in.² and passes through a trap before entering the condenser at 10 lbf/in.² Saturated liquid exits the condenser at 10 lbf/in.² and is pumped to 500 lbf/in.² before entering the steam generator. The turbine and pump have isentropic efficiencies of 85% and 89%, respectively. For the process heat exchanger, assume the temperature at which heat transfer occurs is 465°F. Let To = 60°F. Po = 14.7 lbf/in.² Determine: Steam generator 7p=89% P₁ = 500 lbf/in.² T₁ = 800°F m₁ Heat exchanger Pump 1 (y) ниии (1-y) 77= 85% process P4= 500 lbf/in.² saturated liquid P3= 10 lbf/in.2 saturated liquid Turbine P2= 10 lbf/in,2 Condenser Qout (a) the magnitude of the process heat production rate, in Btu/h. (b) the magnitude of the rate of exergy output, in Btu/h, as net work. (c) the rate of exergy transfer, in Btu/h, to the working fluid passing through the steam generator. (d) the magnitude of the rate of exergy output, in Btu/h, with the process heat. (e) the magnitude of the rate of exergy loss, in Btu/h, from the working fluid passing through the condenser. (f) the sum of the rate of exergy destrution, in Btu/h, in the turbine, process heat exchager, trap, and pump.

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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The figure below shows a vapor power cycle that provides process heat and produces power. The steam generator produces vapor at
500 lbf/in.², 800°F, at a rate of 8 x 105 lb/h. Seventy percent of the steam expands through the turbine to 10 lbf/in.² and the remainder
is directed to the heat exchanger. Saturated liquid exits the heat exchanger at 500 lbf/in.² and passes through a trap before entering
the condenser at 10 lbf/in.²
Saturated liquid exits the condenser at 10 lbf/in.² and is pumped to 500 lbf/in.² before entering the steam generator. The turbine and
pump have isentropic efficiencies of 85% and 89%, respectively. For the process heat exchanger, assume the temperature at which
heat transfer occurs is 465°F. Let To = 60°F. Po = 14.7 lbf/in.²
Determine:
Steam
generator
7p=89%
P₁ = 500 lbf/in.²
T₁ = 800°F
m₁
Heat
exchanger
Pump
1
(y)
ниии
(1-y)
77= 85%
process
P4= 500 lbf/in.²
saturated liquid
P3= 10 lbf/in.2
saturated liquid
Turbine
P2= 10 lbf/in,2
Condenser
Qout
(a) the magnitude of the process heat production rate, in Btu/h.
(b) the magnitude of the rate of exergy output, in Btu/h, as net work.
(c) the rate of exergy transfer, in Btu/h, to the working fluid passing through the steam generator.
(d) the magnitude of the rate of exergy output, in Btu/h, with the process heat.
(e) the magnitude of the rate of exergy loss, in Btu/h, from the working fluid passing through the condenser.
(f) the sum of the rate of exergy destrution, in Btu/h, in the turbine, process heat exchager, trap, and pump.
Transcribed Image Text:The figure below shows a vapor power cycle that provides process heat and produces power. The steam generator produces vapor at 500 lbf/in.², 800°F, at a rate of 8 x 105 lb/h. Seventy percent of the steam expands through the turbine to 10 lbf/in.² and the remainder is directed to the heat exchanger. Saturated liquid exits the heat exchanger at 500 lbf/in.² and passes through a trap before entering the condenser at 10 lbf/in.² Saturated liquid exits the condenser at 10 lbf/in.² and is pumped to 500 lbf/in.² before entering the steam generator. The turbine and pump have isentropic efficiencies of 85% and 89%, respectively. For the process heat exchanger, assume the temperature at which heat transfer occurs is 465°F. Let To = 60°F. Po = 14.7 lbf/in.² Determine: Steam generator 7p=89% P₁ = 500 lbf/in.² T₁ = 800°F m₁ Heat exchanger Pump 1 (y) ниии (1-y) 77= 85% process P4= 500 lbf/in.² saturated liquid P3= 10 lbf/in.2 saturated liquid Turbine P2= 10 lbf/in,2 Condenser Qout (a) the magnitude of the process heat production rate, in Btu/h. (b) the magnitude of the rate of exergy output, in Btu/h, as net work. (c) the rate of exergy transfer, in Btu/h, to the working fluid passing through the steam generator. (d) the magnitude of the rate of exergy output, in Btu/h, with the process heat. (e) the magnitude of the rate of exergy loss, in Btu/h, from the working fluid passing through the condenser. (f) the sum of the rate of exergy destrution, in Btu/h, in the turbine, process heat exchager, trap, and pump.
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