Heat pump & heat exchanger calculator

Calculate heat output and COP for a system with a counterflow plate heat exchanger between the heat pump and the radiator system. Calculation based on effectiveness NTU method [1].


W/m2.K
m2

Heat pump side (Primary) Radiator side (Secondary)
Flow rate
L/min
L/min
Heat capacity
J/kg.K
J/kg.K
Flow temperature
°C
°C
Return temperature
°C
°C
Mean water temperature
°C
°C
°C
°C
W
°K
W

Comparison with open-circuit system without a heat exchanger:

W

[1] Effectiveness NTU method, implementation here ported from python CalebBell/ht library.

[2] 15000 W @ 50K = 7x 1200x600mm K2 double panel radiators, each with an output of 2145W @ 50K.