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:
Oct. 15, 2002
Filed:
Dec. 06, 1999
Scott M. Benedict, Orlando, FL (US);
Greg S. Cole, Ormond Beach, FL (US);
Mainstream Engineering Corporation, Rockledge, FL (US);
Abstract
A control system and a method for controlling a centrifugal chiller through which a fluid to be chilled passes includes a chilling apparatus having at least one of each of the following components; an evaporator, a compressor, preferably a magnetic bearing compressor, a condenser and an expansion device. A plurality of sensors measure and generate signals representing operating conditions within the chilling apparatus. A chiller control unit including a signal processor receives the signals generated by the plurality of sensors. The chiller control unit further includes a memory device that stores information relating to thermodynamic properties of specific fluids and a comparison device programmed with a comparison algorithm that compares the received signals generated by the plurality of sensors to thermodynamic properties of the specific fluid contained in the memory device. Based on the comparison, the control unit generates at least one control signal to vary operation of one or more of the evaporator, compressor, condenser and expansion device to ensure the chiller system is operating at maximum efficiency.