Steady-state operating data are shown in the figure for an open feedwater heater. Heat transfer from the feedwater heater to its surroundings occurs at an average outer surface temperature of 50°C at a rate of 100 kW. Ignore the effects of motion and gravity and let T 0 = 25°C, p0 = 1 bar. Determine (a) the ratio of the incoming mass flow rates, ?̇# /?̇ $ . (b) the rate of exergy destruction, in kW.
Steady-state operating data are shown in the figure for an open feedwater heater. Heat transfer from the feedwater heater to its surroundings occurs at an average outer surface temperature of 50°C at a rate of 100 kW. Ignore the effects of motion and gravity and let T 0 = 25°C, p0 = 1 bar. Determine (a) the ratio of the incoming mass flow rates, ?̇# /?̇ $ . (b) the rate of exergy destruction, in kW.
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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Steady-state operating data are shown in the figure for an open feedwater heater.
Heat transfer from the feedwater heater to its surroundings occurs at an average outer surface
temperature of 50°C at a rate of 100 kW. Ignore the effects of motion and gravity and let T 0 =
25°C, p0 = 1 bar. Determine
(a) the ratio of the incoming mass flow rates, ?̇# /?̇ $ .
(b) the rate of exergy destruction, in kW.
Heat transfer from the feedwater heater to its surroundings occurs at an average outer surface
temperature of 50°C at a rate of 100 kW. Ignore the effects of motion and gravity and let T 0 =
25°C, p0 = 1 bar. Determine
(a) the ratio of the incoming mass flow rates, ?̇# /?̇ $ .
(b) the rate of exergy destruction, in kW.
Transcribed Image Text:1
m₁ = 0.7 kg/s
P₁ = 1 bar
T₁ = 40°C
2
Tb = 50°C
m2
P2 = 1 bar
T₂ = 400°C
Feedwater heater
ecv
3
m3
x3 = 25%
P3= 1 bar
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