kW = (Flow Rate x Delta T) / 0.86
Volumetric Water Flow Rate in SI-Units
Volumetric water flow in a heating system can be expressed with SI-units as
q = h / ((4.2 kJ/kgoC) (1000 kg/m3) dt) = h / (4200 dt) (4) where q = water flow rate (m3/s) h = heat flow rate (kW or kJ/s) dt = temperature difference (oC)
h (kW) = Water flow rate (M3/s) X SHC (4200) X dt (flow – return)
How to convert Litres per minute to Cubic meters per second 1 Litres per minute (l/min) is equal to 0.000016666666666666667 Cubic meters per second (m3/s). 1 l/min = 0.000016666666666666667 m3/s or 1 m3/s = 60000 l/min
Water flow rate LPM to M3/s =