August 2009

Special Report: Fluid Flow and Rotating Equipment

A retrofit of this system at a refining company provided a payout in less than a year

Improved stepless capacity regulation for reciprocating compressors

Hong, W., Jin, J., Institute of Process Equipment; Tang, L., Sinoec Zhenhai Refining & Chemical Co.

  Because of the conflict between the fixed capacity and the varying operating conditions in process units, it is extremely important to implement stepless capacity regulation of reciprocating compressors to meet the demands of a changing industry. This article presents a new regulation facility to achieve this aim. Introduction. Reciprocating compressors are still widely used in the gas and refining industries to compress light gases such as hydrogen, ammonia and methane for their wide adaptability and high efficiency. But regulating capacity efficiently for this type compressor is a long-term problem. Three ways to provide capacity regulation for reciprocating compressors are:1

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