2202MYJE-MY-C8-N_2018.02.
Chapter 2 Compressor Specifications and Structure
Compound 2-stage Screw Compressor 3225**C 2.6 Gas and Oil Flow
2-22
2.6 Gas and Oil Flow
The compression process of the screw compressor is as described in the preceding paragraphs.
Gas of the compound 2-stage screw compressor 3225**C is sent from the evaporator, and passes
through the strainer and check valve. It is drawn in from the upper central area (1) of the compressor,
compressed at the low-stage side (2), and then discharged at (3).
(3) and (4) are connected with a pipe. At the mid point of the pipe, that gas is mixed with the gas from
liquid cooler which was used for super-cooling.
Lubricating oil injected at the low-stage is, while kept mixed with gas, suctioned from (4) into the
high-stage.
After being compressed at (5), the gas mixed with lubricating oil is discharged from (6), and is sent from
the oil separator to the condenser.
Even if without intermediate gas cooling, oil provides cooling effect.
So, the high-stage discharge temperature is maintained at a temperature not higher than 90°C.
Figure 2-22 Gas Flow
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