Invention Grant
- Patent Title: Performance-based control system
- Patent Title (中): 基于性能的控制系统
-
Application No.: US610146Application Date: 1996-02-29
-
Publication No.: US5855791APublication Date: 1999-01-05
- Inventor: George Hays , John Haaland
- Applicant: George Hays , John Haaland
- Applicant Address: OH Dublin
- Assignee: Ashland Chemical Company
- Current Assignee: Ashland Chemical Company
- Current Assignee Address: OH Dublin
- Main IPC: G01N27/06
- IPC: G01N27/06 ; C02F1/00 ; C02F1/68 ; C02F5/00 ; C02F5/08 ; C23F15/00 ; F02C7/16 ; F28G13/00 ; G01N33/18 ; G05D21/02 ; G05D21/00
Abstract:
A method for detecting and controlling cooling system characteristics. A flow rate of make-up cooling medium is measured. A conductivity of the make-up cooling medium is measured. A conductivity of a recirculating cooling medium is measured. A treatment material feed rate is determined based upon the formula: ##EQU1## where X is a treatment feed rate of a treatment compound, .OMEGA. is a desired concentration of the treatment compound, and K is a constant. A corrosion rate of the recirculating cooling medium is measured. A desired corrosion rate of the recirculating cooling medium is determined. A feed rate of a corrosion inhibitor is calculated according to the following formula:Y=(X)�1+.alpha.(CORR.sub.MEASURED /CORR.sub.SETPOINT)!,where .alpha. is a cascade factor that varies in a step-wise manner depending upon the value of CORR.sub.MEASURED /CORR.sub.SETPOINT and has a value between about 0.1 and about 8.0. A corrosion inhibitor is then fed at the corrosion inhibitor feed rate.
Public/Granted literature
- US5186960A Low pressure 3D extrusion Public/Granted day:1993-02-16
Information query
