By Theodore Gresh
This e-book should be liked as a convenient reference booklet through compressor layout engineers and compressor upkeep engineers in addition to engineering scholars. As its name indicates, this booklet covers the complete spectrum of data wanted for somebody to choose, function, try and retain axial or centrifugal compressors. It comprises a few simple aerodynamic concept to supply the consumer with the "how's" and "why's" of compressor layout. upkeep Engineers in particular will get pleasure from the troubleshooting instructions provided. the numerous instance difficulties and the reference info equivalent to fuel homes and circulate meter calculations will allow effortless research of compressor functionality in perform. a working laptop or computer application can also be provided in an effort to increase the price of the booklet and the years of craftsmanship and adventure therein.M. Theodore Gresh has been with the Elliot corporation in Jeannette, Pennsylvania, in view that 1975, before everything engaged on the mechanical and aerodynamic layout and alertness of centrifugal compressors.
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Extra resources for Compressor Performance: Aerodynamics for the User
Clearance increased, turbulence reduced, leakage increased. 10. Effect of coated and non-coated surfaces on dirt/ polymer buildup in diffuser passages of a centrifugal compressor. iiiiiiiiiiiiiiiiiiiii I .... i I........ ,~. ~ /~' . . . . . . I, . i " - ,' ,,, - ~i::i/, i~i~ ~ . . . . iii~ [ 9 . 11. Aluminium labyrinth. New and clean. Turbulence creates resistance to leakage flow. 14. Rubbed abradable seal. Running clearance unaltered, turbulence continues to create resistance to leakage flow.
02 = 2664 HP ft-lbf = 37029 ibm -~ Check the discharge temperature for a need to intercool (cool if/'2 > 400~ Add losses for bearings and seals (data from vendor literature). 475) = 811 OR = 351 OF Iso-cooling is therefore not required. 50 APPLICATION RERATES* Frequently, process requirements change due to market fluctuations, new concepts in processing, or other reasons. Because of this, the compressor can be called upon to operate in a range for which it was not originally designed. One way to satisfy the needs of the new conditions is of course to buy new equipment.
Install a AP gage across the screen to monitor the condition of the screen. Occasionally, process compressors are operated on air to "dry out" the system before operation on normal process gas. Discharge temperature or seal operation may be the limiting factor here, but occasionally volume ratio effects may prevent operation. For best results, the manufacturer of the equipment should be consulted to review this offdesign condition. *Adapted from "Compressor Refresher," Elliott Company, Jeannette, PA, 1975, with permission [ 11].
Compressor Performance: Aerodynamics for the User by Theodore Gresh