Air conditioning
The first law of thermo-dynamics says that the spontaneous transfer of warmth always take place from warmer to colder part of system. That is the principle of energy dispersion. Temperature and pressure are measures of energetic content of physical system, what is higher temperature and pressure it's higher energetic content of physical system. Because of that air-conditioning is active process which spends additonal energy so that the cold energy
( space that is air-conditionaling ) could be lead to a warmer space ( environment ). It's a process which works against the mentioned law owing it to a warmth isolation which exists between air-conditioning space and environment.
Entire energetic balance-sheet of a process is that the warmth content of a system is considerable higher after cooling than before it, but wanted effect is achieved through the unbalance between outside and inside space.
Just like refrigerators air-conditioning devices have two heating exchangers. It's device that looks on like car radiators or bars on the behind of kitchen refrigerators, meaning that compressor unit which does the presssure of a gas and space, were gas pressured to maximum goes in liquid condition and than again evaporates ( expands ).
Although it's a continuous circle process, perhaps it's the easiliest way to explain that process which is happening in air-condition devices by the help of degrees. At first, on heating exchanger, the warm air that needs to be cooled down warms up in air-condition device the liquid gas and it evaporates. Warmed up gas goes to compressor unit were is pressured again.
Although the heating contents of gas remains the same his temperature is growing through the pressure process and crosses the temperature of environment. Regarding to that, a part of heating energy stored in pressured gas spontaneusly will be on the other heating exchanger «scattered» in environment, meaning that the gas will cool down and environment will be warmed up. With suitable choice of type of gas in this part of device the process is reviving.
We can distinguish three main performances:
1. Split Systems - in which the gas pressure and exchange of heat with environment is performing in outside unit built outside of the room and evaporation of liquid gas and cooling of the air in the room are perfoming in inside unit built inside the room that needs to be cold down.
2. System for indirect cooling - in which is the water that circulates in closen system of a pipe, is cooling down through the compressor and serves like heat transmission to the inside units which are cooling the air.
3. Systems in which pipes are leading the air from room to the cooling devices built outside and which are returning the cold air back in the room through the venti