search

BeamCtrl / Airiana

SystemAir Modbus Ventilaton Controller VR400/VR700/VTR300/VSR300/SaveCair
Other
26 stars 7 forks source link

Electrical power calculation / VTR300 #8

Closed kromosomX closed 3 years ago

kromosomX commented 3 years ago

I think the electric power calculation is wrong for the VTR300. In airiana i get a value of 325W when the electrical meter hooked up to VTR300 is showing 170W. In VTR300 specifications Pmax is 179W (without the heater).

BeamCtrl commented 3 years ago

i have added a scaling factor ,0.57 for savecair units, you can try to test some different speed combinations on your unit to see i power consumption matches, this formula that is used was derrived from my old vr400 unit and the motor characteristics may be a bit off but should generally be a fair match.

kromosomX commented 3 years ago

This is much better. Here are the values i get now: Fan setting, RPM-S, RMP-E, Airinana EP, Measured EP High; 3240; 3240; 185; 172 Norm: 1860; 1860; 37; 42 Low: 780; 780; 3; 15

The exchanger only adds 1W to the consumption, when the fan in running low. Funny thing is that when the fan is High the consumption falls 1-2W when the exchanger starts.

BeamCtrl commented 3 years ago

ok so I decided to do it properly, added new equation, power = 3.404exp(0.001SFfan_rpm) + 3.404exp(0.001SFfan_rpm) .. matches quite well here however I can only read the power draw to -1 decimal place. //Daniel