A/c and referigeration?

what do you mean by Referigeration and air conditioning.

Answer:
what do YOU mean by Referigeration and air conditioning?
Refrigeration means using mechanical means to cool an enclosed chamber (like the one in your kitchen called the "refrigerator;" see a connection?) to temperatures suitable for preserving food.

Air Conditioning means using the same methods to cool air circulating in a room, building, vehicle, or other enclosure.

Please try an internet search on "refrigeration," and one on "air conditioning." You will find lots of information, pictures, diagrams.
Refrigeration and air conditioning systems both use a refrigerant liquid/vapour Thermo-Dynamic Cycle to produce cooling.
Roughly to say, refrigeration is process to cool the temperature. Air conditioning is process to condition the air to desired condition ( set the air temperature, air speed, humidity ).
Usually air condition intended for human is 20 deg.C, humidity 50%. ( Humidity below 50% will irritate nose, humidity over 90% will make sweat )
Air condition for electric control room is ( temperature is depends on requirement, usually about 18-20 deg.C ) , Humidity 30-50%.

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