6/20/2015

Helical-Rotary Water Chillers A Trane Air Conditioning party 2

Helical-Rotary Water Chillers
A Trane Air Conditioning
party 2


Helical-Rotary Water Chillers




period one:
Components:

In the operation of the helical-rotary compressor, refrigerant vapor enters the compressor housing through the intake port. The intake port in this example is at the top of the compressor housing

 
  
The entering refrigerant vapor is at a low, suction pressure and fills the grooves or pockets formed by the lobes of the rotors. As the rotors turn, they push the   pockets of refrigerant toward the discharge end of the compressor

Viewing the compressor from the side shows that after the pockets of refrigerant travel to the right past the intake port area, the vapor, still at suction pressure, is confined within the pockets by the compressor housing.

  
Viewing the compressor from the top shows that rotation of the meshed rotor lobes drives the trapped refrigerant vapor (to the right) ahead of the meshing point

Continued rotation of the rotors causes the meshing point to travel toward the discharge end of the compressor, driving the trapped refrigerant vapor ahead of it. This action progressively reduces the volume of the pockets, compressing the refrigerant.



Finally, when the pockets of refrigerant reach the discharge port the compressed vapor is released. As the rotors continue to rotate, the volume of the pockets is further reduced, squeezing the remaining refrigerant from the cavities. Notice that the refrigerant vapor enters and exits the compressor through ports—no valves are used. Compressors of this design are called ported compressors.


                                                                     abo bahaaeddine




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