[Editor’s note: This is the third in a series of three columns about scroll compressors that began in the Sept. 1 issue of The NEWS and continued in the Oct. 6 issue.] Compressor capacity control is ...

A shift to angular and polar coordinates offers control engineers a more physically rigorous, PID-friendly approach ...

Although digital control systems—distributed control systems, programmable logic controller, and other automation equipment—are present in practically every process safety management (PSM) facility ...

Installing a recycle valve in parallel with the antisurge valve of a turbine-driven multistage (low pressure/high pressure) centrifugal compressor, in combination with control system modifications, ...

It is said that necessity is the mother of invention. As energy prices soared in the 1970s, supermarket owners sought ways to reduce their enormous utility bills. Unlike comfort cooling equipment, ...