I bought a nest gen 2 thermostat to play with a open source project that revives old nest thermostats (https://nolongerevil.com/). Since I don’t want to install it into the home, because it will be a toy. I was thinking of building a test rig using a arduino or esp32 to simulate a HVAC and indoor temperature. I’m IT guy, not a HVAC guy, I think this would be a good learning project. Any suggestions?
I don’t think anyone designed it to do that, becsuse 220C is like 100C above critical point of some common refrigerants (evaporation/condensation stops being a thing at this point and heat can be transferred only from hot to colder and not very efficiently)