a crossflow heat echanger cools liquid water from 190F to 110F using air at 1atm entering...
a crossflow heat echanger cools liquid water from 190F to 110F using air at 1atm entering at 90F and heating to 130F. the water rate is 1 gpm and the heat echanger area is 10 ft^2. estimate the overall heat transfer coefficient
Homework Answers
liquid
T1 =190F
T0 = 110F
Air
T1' = 130F
T0' = 90 F
Q = UATm
Tm = {(190-130) -(110-90)} / [ln(60/20)}
=60x20/1.098
1092.8 F = 589.33 C
A = 10 ft 2 =0.92 m2
Q = mCdT
m = 0.06 kg
C = 4181 j/kg/c
Q = 0.06x4181x80
20068.8 = Ux0.92x589.33
U =37.01 J/m^2C
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