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THE REFRIGERATION PROCESS - Coggle Diagram
THE REFRIGERATION PROCESS
EVAPORATION
even though the evaporator coil is cold, at approximately 46,
the refrigerant inside is evaporating, or boiling, changing from liquid to a gaseous state.
when the warm room air passes through the cold evaporation coil it is cooled and this cool air is delivered back to the room.
it is the heat from the room that is boiling the refrigerant, passing heat energy to the refrigerant in the process.
warm air from the room is blown across the evaporator coil by fan.
the refrigerant at this point is a cool gas in a small pipe that is carrying the heat energy away from the room.
Is the first step in removing heat energy from a room
COMPRESSION
it pushes the refrigerant carrying the heat energy around the refrigeration loop.
it compresses the gaseous refrigerant.
this compressor has two important function:
it is a fundamental property of gases that the compression of a gas causes its measured temperature to rise.
the vaporized but cool refrigerant carrying the heat from the data center is drawn into a compressor.
the moving gaseous refrigerant exiting the compressor is hot
this temperature rise due to compression is the key to the ability of the refrigeration loop to eject heat into the outdoor environment.
CONDENSATION
the air flowing across the coil is heated by the coil, and the hot gaseous refrigerant flowing through the coil is conversely cooled.
heat is flowing from the refrigerant to the air.
the condenser coil operates at a temperature higher than the air
the air is typically blown across the hot coil by a fan which exhausts the hot air to the outdoors.
this coil transfers heat to another medium, like air
the heat energy from the room has been pumped to the outdoors.
The hot compressed refrigerant carries the room heat energy from compressor to the condenser coil.
EXPANSION
air conditioner system operated in this way will continuously pump heat energy out of the room.
the heat is continuously flowing into the evaporator coil and continuously flowing out of the condenser coil.
the refrigerant, which has thus been cooled to below the room temperature, re-enters the evaporator coil
it is fundamental property of gases that the expansion of a gas causes its measured temperature to fall.
this valva has 2 key function
the refrigerant then passes through an expansion valve before returning to the evaporator coil
The refrigerant exits the condenser coil as a high-pressure liquid, although at a lower temperature