John Cantor

This video usually baffles old fridge engineers. liquid in the suction was definately a no no in the past, and using discharge superheat to esimate the condition in the evaporator is simple and genius.

I think Mitsi bring out a small R290 split next year

Using Carnot COP equation and measuring the refrigerant temperatures. heatpumps.co.uk/cop-estimator/ It wont however deal with defrost losses which will be considerable. Its too warm to properly test it!

Sorry, I'm not looking here much, but thought I would post about the air-air heat pump that I have fitted as an experiment at www.tajmahalcommunityhub.org Its being written up here (work in progress) heatpumps.co.uk/the-hub/ and monitored here emoncms.org/thehub It's an ElectriQ R290 model.

Ah.. OK. Hostorically ALL refrigerant control was done by sensing the boiling refrigerant in the evaporator... genius to use discharge temperature to glean the conditions in the evaporator.

YouTube video by Siam Compressor Industry Co., Ltd SCI Discharge Superheat English

Always worth watching this .
Not sure why it should be 'flooding' I guess lost likely due to one of the sensors involved in the control??https://www.youtube.com/watch?v=RXV-35gfQrk

I had better start using it then! Thanks

Thanks for your kind words Dan.

Is this the place to be? will it catch on??