1) Air enters an adiabatic heat exchanger (HX) with a mass flow rate of 850 kg/s at T₁ = 350°C and P₁ = 110kPa and leaves at T₂ = 60°C and P₂ = 100kPa and transfers heat to water which enters the HX as a saturated liquid at 16MPa. The water mass flow rate is 160 kg/s and it leaves the HX at 15MPa. Air has a constant specific heat of cp = 1.013 kJ/kg . K and specific heat ratio of k = 1.395. Calculate b) the exergy destruction rate of the HX, in MW if the dead state temperature is T₂ = 20°C. To Hot stream ww ww Cold stream

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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1) Air enters an adiabatic heat exchanger (HX) with a mass flow rate of 850 kg/s at T₁ = 350°C and
P₁ = 110kPa and leaves at T₂ = 60°C and P₂ = 100kPa and transfers heat to water which enters
the HX as a saturated liquid at 16MPa. The water mass flow rate is 160 kg/s and it leaves the HX
at 15MPa. Air has a constant specific heat of Cp = 1.013 kJ/kg . K and specific heat ratio of k =
1.395. Calculate
b) the exergy destruction rate of the HX, in MW if the dead state temperature is T₂ = 20°C.
To
Hot
stream
+
w
ww
3
84
Cold
stream
Transcribed Image Text:1) Air enters an adiabatic heat exchanger (HX) with a mass flow rate of 850 kg/s at T₁ = 350°C and P₁ = 110kPa and leaves at T₂ = 60°C and P₂ = 100kPa and transfers heat to water which enters the HX as a saturated liquid at 16MPa. The water mass flow rate is 160 kg/s and it leaves the HX at 15MPa. Air has a constant specific heat of Cp = 1.013 kJ/kg . K and specific heat ratio of k = 1.395. Calculate b) the exergy destruction rate of the HX, in MW if the dead state temperature is T₂ = 20°C. To Hot stream + w ww 3 84 Cold stream
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