Dear all,
I'm trying to model in indoor swimming pool heated by an air to water heat pump.
I set up a simple model to emilate this scenario.
The swimming pool zone is heated only by an electric radiator with a 33°C set point temperature. The swimming poll is at 30°C.
The
a-to-w hp should produce water @ 55°C and I fixed the design loop exit
temperature @ 56 °C with a 5°C temperature difference.
The heat pump should have a power of 50 kW.
The
simulation seems to be unable to autosize the loop flow rate to heat
the swimming pool and I don't understand how to fix this problem.
The .err file reports:
** ~~~ ** Setpoint was never recovered and/or heater never turned on
** Warning ** SizePlantLoop: Calculated Plant Sizing Design Volume Flow Rate=[0.00] is too small. Set to 0.0
** ~~~ ** ..occurs for PlantLoop=AUX HW LOOP
** Warning ** SizePump: Calculated Pump Nominal Volume Flow Rate=[0.00] is too small. Set to 0.0
** ~~~ ** ..occurs for Pump=AUX HW LOOP SUPPLY PUMP
** Warning ** Check input. Pump nominal power or motor efficiency is set to 0, for pump=AUX HW LOOP SUPPLY PUMP
** Warning ** Check input. Pump nominal flow rate is set or calculated = 0, for pump=AUX HW LOOP SUPPLY PUMP
But the pool is unheated even if I fix minimum flow rate for loop and pumps.
Has any of you had experience of this problem before? Could anyone help me just having a look to the file I upload?
Thanks a lot,
Marco