Sinossi
Presents criteria and data to help engineers compare the cost and efficiency of variable-speed controls on rotary equipment against other types of control elements. The author reviews relevant electrical and hydraulic information, explores the calculation of utility costs, and overviews several applications of control valves, alternate final control elements, and variable frequency drive technology. No index is provided. Annotation ©2004 Book News, Inc., Portland, OR (booknews.com)
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