By American Institute of Chemical Engineers (AIChE)
With its engineer-tested tactics and thorough reasons, Centrifugal Compressors is a vital textual content for an individual engaged in imposing new expertise in apparatus layout, making a choice on technique difficulties, and optimizing gear functionality. This condensed booklet provides a step-by-step method of getting ready for, making plans, executing, and reading assessments of centrifugal compressors, with an emphasis on tools that will be carried out on-site and with an acknowledgement of the strengths and obstacles of those equipment. The ebook opens with an intensive and targeted part supplying de. Read more...
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Additional info for AIChE Equipment Testing Procedure - Centrifugal Compressors : A Guide to Performance Evaluation and Site Testing
As a rule of thumb, the schematic should show the piping within 20-30 pipe diameters of all compressor inlets and discharges and the flow measuring device(s). Other items that should be shown in the schematic are: • • • • Valves, elbows, separation drums, silencers, flow straighteners, coolers Changes in pipe diameter Secondary flows entering the piping near the compressor Lines for bypasses or recirculation around the compressor All of these items cause pressure drops or induce swirl in the flow that can penalize the compressor performance if they are not properly addressed.
If possible, at least two test points should be taken at the given flow. If the compressor system is indeed stable or fixed, the data points will plot on top of each other. This avoids the frustration of trying to take steady state points on a sys tem that is drifting. 4 Some compressors operate on constantly varying conditions due to steam injec tion, water spraying, etc. If the system varies at a rapid rate, this should be noted with 24 Centrifugal Compressors the test data. "Rapid rate" is difficult to define.
2 If the test is to be performed under actual process conditions, as in an operating production unit, attention must be given to the possible restric tions. 1 In many processes, flow cannot be varied at will. 2 If a bypass is used, care must be taken to ensure the bypassed flow does not upset the flow, inlet pressure, and inlet tem perature measurements. 1 Since this procedure is directed towards site testing, it is assumed that the compressor will be running on the design gas at or close to the design con ditions.
AIChE Equipment Testing Procedure - Centrifugal Compressors : A Guide to Performance Evaluation and Site Testing by American Institute of Chemical Engineers (AIChE)