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Friction heat from water
Posted: Wed Jan 12, 2011 5:09 pm
by Plerik
Can sommebody tell me how much heat there is generated from water passing through a steel pipe
exc. 200 m3/h in a dn 150 mm pipe lenght 20.000 meter
Re: Friction heat from water
Posted: Wed Jan 12, 2011 6:21 pm
by admin
Do you mean by friction? What is pipe material? And pipe roughness?
Re: Friction heat from water
Posted: Thu Jan 13, 2011 10:22 am
by Plerik
Administrator wrote:Do you mean by friction? What is pipe material? And pipe roughness?
I mean the friction betwenn pipe and the water pumped through the pipe, the pipes are steel with roughness 0,1, the temp. inlett is 85°c.
Re: Friction heat from water
Posted: Fri Jan 14, 2011 8:40 am
by admin
When you calculate pressure drop in Pa - you can look at it like pressure energy changing to heat due to friction and it is quantity of energy in unit mass J/kg.
So for pressure drop of 1 Pa, with fluid density of 1 kg/m3, you have 1 J of energy per 1 kg of mass.
Dp/rho - J/kg - energy per mass unit