The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 25, 1989
Filed:
May. 19, 1987
James W Hobbs, Sweeny, TX (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
A supervisory computer is provided for controlling a compressor wherein a computer generated set point manipulates flow in a recycle line from the compressor outlet to inlet. The supervisory computer manipulates the recycle flow so as to prevent the compressor from surging due to changes in flow rate, pressure or the molecular weight of the gas being compressed. The molecular weight of the gas is calculated on-line from actual measurements of flow, pressure, temperature and speed along with compressor performance data that is prestored in the computer. In addition the supervisory computer automatically maintains a minimum flow for the compressor that is as close as possible to the surge limit without danger of putting the compressor into surge due to changes in flow, pressure or molecular weight of the gas being compressed.