Analysis of centrifugal compressor models for turbines produced by GE in Italy

Turbines: SAC1~14. Only domestically produced turbines have been used so far, hence the exact meaning is not known. Compressors: Low-pressure cylinder DMCL1004 – the meaning of “D” is not clear; “CL” refers to a vaneless diffuser, and 100 denotes the nominal diameter of the impeller, with 4 indicating that there are 4 stages of impellers. Medium-pressure cylinder 2MCL1004 – it has two sections, “M” indicates a horizontal split, “CL” refers to a vaneless diffuser, 100 denotes the nominal diameter of the impeller, and 4 means there are 4 stages of impellers. High-pressure cylinder 2BCL807 – it also has two sections, “B” indicates a vertical split, “CL” refers to a vaneless diffuser, 80 denotes the nominal diameter of the impeller, and 7 means there are 7 stages of impellers. The above information is based on domestic compressor models and is based on empirical values; if there are any errors, please point them out.

D denotes the use of a dual-inlet air intake system

100 4: The nominal diameter of the primary impeller exceeds 1000 mm, and the number of impeller stages within the compressor casing is 4

The model is DMCL1104+2MCL1105+MCL806, featuring three cylinders for low, medium, and high pressure, all of which have a horizontally split structure. Among them, the low-pressure cylinder DMCL1104 features a dual-suction design with two stages of compression (a total of four impellers). The maximum nominal diameter of the impellers is 1050 mm. The inlet conditions for the two inlets are identical; after compression, the gases are mixed in the outlet volute, and then the mixed gases proceed to the next stage of compression ； The medium-pressure cylinder 2MCL1105 features two-stage compression (with a total of five impellers) arranged back to back. The maximum nominal diameter of the impellers is 1074 mm. The gas, after being cooled and separated, enters the first stage within this cylinder for two-stage compression; it is then cooled and separated again before entering the second stage within the same cylinder for another two-stage compression ； The high-pressure cylinder MCL806 features a single-stage compression configuration (with six impellers in series); the maximum nominal diameter of the impellers is 800 mm. The gas, after being cooled and separated, enters this cylinder where it undergoes six stages of compression until it reaches the outlet condition. The values can be used as a reference.