We have become dependent on Air Conditioning and Refrigeration in our modern lives, But to most of us, Its a mystery on how they work or why. An air conditioning system moves heat through the use of a fluid. That fluid is called Refrigerant and to many of us its call “Freon” which was a Dupont trade name. Freon is a special class of gasses that in most part is man made. Easily compressed, It gets hot as its volume is reduced and becomes cold when pressure is reduced. For R-22 on the chart ” Charts are available on Line” So at 242 PSIG The boiling point of that Refrigerant is 115 Deg F, In other words If the temp gets hotter its a gas and if is cooler than 115 is a liquid. Sort of like water boiling. Same goes at 64 psig, R-22 boiling point is around 30 deg F, Hotter than 30 deg Its a gas and cooler it is a liquid..Two devices make the change of pressure possible, The Compressor and the Metering device which we will talk about later. CO2 is a refrigerant and so is Ammonia, In fact most hydrocarbons are refrigerants, Butane and Methane, Propane all can be used as refrigerants and are used in Europe.
Tip of the day . Batteries in a thermostat is required to make unit function correctly, Change yours at least twice a year to insure a functioning ac system