[TRNSYS-users] QALFL calculations for radiant floors

[Marie-Claude Hamelin]

Hi,
I would like to know how QALFL (energy input by fluid of active layer to 
active layer) calculations are made. I assume it is something like 
Q=m*Cp*(T_inlet-T_outlet)?
My issue is that I obtain a very high value (32,930 kWh) when 
calculating energy input to flow from my Type534 radiant floor water 
tank, using a Type 28. However, when adding up the QALFL for each of my 
three zones, I obtain 9,541 kWh (which is just above the heating load 
obtain with an ideal heating system and makes sense).
There seems to be energy lost somewhere between my storage tank outlet 
and the floors; however, the tank outlet temperature is directly input 
into the active layer.
Can anyone help with this?
Best regards,

Marie-Claude Hamelin