How many does the turn down of a centrifugal compressor vary if its fixed speed driver be substituted by the variable speed(VFD, Hydrocoupling,or ...)?
Dear members, Hi
In regard to Turboexapnder control system, Recently I've read an article, turboexpander control-USPatent Aug.4 1981 (http://www.freepatentsonline.com/4281970.pdf). I' m doubtful about rightness of a part of it that states: "If the turbo-expander should tend to overspeed, the...