FUND OF ENG THERMODYN(LLF)+WILEYPLUS
9th Edition
ISBN: 9781119391777
Author: MORAN
Publisher: WILEY
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Question 2.1
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. Eighty-eight 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
P₁=500 lbf/in.2
T₁ = 800°F
7p=89%
Heat
exchanger
Pump
(y)
1
minn
(1-y)
77 = 85%
Oprocess
P4= 500 lbf/in.²
saturated liquid
P3= 10 lbf/in.²
saturated liquid
Turbine
W₂
P₂=10 lbf/in.²
2
Condenser
(a) the…
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. Eighty-eight 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
1₂=89%
P-500lb/²
7₁ = 80XFF
M₁
Heat
exchanger
Pamp
B
1 (1-y)
гибши
4-85%
P= 500 lbfin?
saturated liquid
P=10 lbffin²
saturated liquid
Turbine
W₁
Py=1002
me
Condenser
(a) the magnitude of the process heat…
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Similar questions
- 13arrow_forwardThe 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 104 lb/h. Eighty-eight 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.2Saturated 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 T0 = 60°F, p0 = 14.7 lbf/in.2 Determine:(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…arrow_forwardThe 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 104 lb/h. Fifty-two 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.2Saturated 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 T0 = 60°F, p0 = 14.7 lbf/in.2 Determine:(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…arrow_forward
- A Carnot vapor power cycle operates with water as the working fluid. Saturated liquid enters the boiler at 1400 lbf/in.2, and saturated vapor enters the turbine (state 1). The condenser pressure is 1.2 lbf/in.2 The mass flow rate of steam is 5.5 x 106 lb/h. Data at key points in the cycle are provided in the accompanying table. Determine: State 1 2 3 4 p (lbf/in.2) h (Btu/lb) 1400 1.2 1.2 1400 1174 758.3 446.5 598.8 (a) the percent thermal efficiency. (b) the back work ratio. (c) the net power developed, in Btu/h. (d) the rate of heat transfer to the working fluid passing through the boiler, in Btu/h.arrow_forwardSteam enters the turbine of a vapor power plant at 600 lbf/in.2, 1300°F and exits as a two-phase liquid–vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.2 The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW.Determine:(a) the percent steam quality at the turbine exit.(b) the percent thermal efficiency.(c) the steam mass flow rate, in lb/h.arrow_forwardSteam enters the turbine of a vapor power plant at 600 lbf/in.2, 1000°F and exits as a two-phase liquid–vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.2 The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW.Determine:(a) the percent steam quality at the turbine exit.(b) the percent thermal efficiency.(c) the steam mass flow rate, in lb/h.arrow_forward
- 2. please answer asaparrow_forwardRefrigerant 22 is the working fluid in a Carnot refrigeration cycle operating at steady state. The refrigerant enters the condenser as saturated vapor at 36°C and exits as saturated liquid. The evaporator operates at -30°C. Determine, in kJ per kg of refrigerant flowing, the heat transfer to the refrigerant passing through the evaporator. (A) 156.26 B 124.26 144.26 134.26arrow_forwardSteam enters the turbine of a vapor power plant at 600 lbf/in.², 1000°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.² The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in lb/h.arrow_forward
- Steam enters the turbine of a vapor power plant at 600 lbf/in.², 1000°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.² The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in lb/h. Part A * Your answer is incorrect. Determine the percent steam quality at the turbine exit. x₂ = i 78.67 %arrow_forwardPlease help and show solution pleasearrow_forwardQuestion 4 of 15 Steam enters the turbine of a vapor power plant at 600 lbf/in.2, 1000°F and exits as a two-phase liquid-vapor mixture at 90°F. Condensate exits the condenser at 85°F and is pumped to 600 lbf/in.2 The turbine and pump isentropic efficiencies are 90 and 80%, respectively. The net power developed is 1 MW. Determine: (a) the percent steam quality at the turbine exit. (b) the percent thermal efficiency. (c) the steam mass flow rate, in lb/h. Iarrow_forward
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