temperature rise of fluid due to pipe friction
temperature rise of fluid due to pipe friction
(OP)
What fomula could be used to detemine the temperature rise of a liquid due to the pipe friction?
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temperature rise of fluid due to pipe friction
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RE: temperature rise of fluid due to pipe friction
The energy lost to friction must be turned into heat - this heat is on the other side exchange with the surroundsings.
Best regards
Morten
RE: temperature rise of fluid due to pipe friction
ChemE, M.E. EIT
"The only constant in life is change." -Bruce Lee
RE: temperature rise of fluid due to pipe friction
RE: temperature rise of fluid due to pipe friction
v= spec. volume
p=pressure
u=velocity
F=friction, (f/d)u^2/2
s spec. entropy
T=abs. temp
Q=heat transfer
x=distance
T(ds/dx)= uF+Q
dh/dx-vdpdx=uF+Q
Cp=spec heat at const press.
for Adiabatic conditions and v approx constant
Cp(Delta T)-v(Delta p)=uF(pipe length)
Knowing pressure drop, spec. heat,spec. vol, velocity and friction factor, --Solve for Temp difference.
RE: temperature rise of fluid due to pipe friction
energy equations dh+du^2/2=0
highly incomp flow yields approximation of dh=0 perfect for use of J-T
dh/dx-vdpdx=uF+Q
dh/dx-vdpdx=uF adiabatic
-vdpdx=uF for dh=0
-v(dp/dT)dT/dx=uF
-v/mu(dT/dx)=uF
delta temp= -(mu)(uF/v)*length of pipe
Comments please!
RE: temperature rise of fluid due to pipe friction
With motor out, driven equipment in, heat gain Btu/hr Q = bhp x 2545 = gpm x 500 x (°F Td)