Dear all,
I am designing an underfloor heating system and I would like some clarification concerning the flow rate or velocity of water in tubes for the underfloor heating system.
Many Thanks
The water HTF massflowrate is given by:
m = (Q x 3600) ( ro x c x DT)
Avec :
m = water massflowrate in l/h
Q = Thermal power to transfer in W
ro = Density kg/m3
c = water heat capacity kJ/kg K
DT = Température in K. (T° in - T° out in K)
Thank you very much for your help Prof. Mohammedi
But, if I'm not mistaken, there was supposed to be a division sign in between..
That is :
m = (Q x 3600) / ( ro x c x DT)
Can you please confirm.
Thank you very much in advance.
Flow rate can be determined by an energy balance: heat loss of water = heat convected to air in heated rooms.
The velocity is limited by the possible noise generation due to turbulences ( if it is a space where human beings work or live). since water has a high convection coefficient low velocity is not a problem.
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