Volume simulator with heat pump COP
Explore heat pump minimum modulation and cycling's effect of COP.
Note: Some but not all heat pump models can take time to get into an efficient operating range at the start of the cycle. This simulation is a simplified model and does not take this into account. Real world performance impact of cycling may be different to the results given here.
Simulation window: {{ hours | toFixed(1) }} hours
W @ -3C
C
C
W
W
W
°K
min
L
min
°K
°K
Simplified minimum volume calculation:
Minimum volume = (minimum heat output × minimum compressor on time) ÷ (specific heat × target DT)
Above example: ({{ minimum_heat_output }}W × {{ minimum_on_time_min*60 }}s) ÷ (4187 J/kg.K × 5K) = {{ suggested_volume | toFixed(0) }} Litres
Target DT range is typically 5-10K
Think of this as the volume required to provide the compressor with the minimum on time under a zero load (no emitter output) condition assuming the volume increases in temperature by the target DT given.