60 SECTION II Types of Equipment
FIG. 3.29 Control methods for centrifugal compressors: throttling, variable speed, and adjustable
guide vanes. (P.C. Rasmussen, R. Kurz, Centrifugal compressor applications-upstream and mid-
stream, in: Proc. 38th Turbomachinery Symposium, Houston, TX, 2009.)