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:
Jul. 17, 1984
Filed:
May. 26, 1983
Azmi Kaya, Akron, OH (US);
Michael S Willey, Chagrin Falls, OH (US);
The Babcock & Wilcox Company, New Orleans, LA (US);
Abstract
An arrangement and method of controlling optimum chilled water temperature supplied to a process by a pump, the water being chilled by coolant in a coolant cycle having a compressor and a load valve, comprises first and second sensors for sensing a supply and a return temperature to and from the process. A value is obtained for the amount of work done by the pump and the compressor with that value as well as the supply and return temperature values being supplied to a supervisory control. The supervisory control operates to generate a reference temperature which is a function of the supply temperature but which is either above or below the supply temperature depending on a ratio between the difference in work and a change in the difference between the supply and return temperatures. When the ratio is about zero this indicates the difference between supply and return temperature is at an optimum and the reference temperature is the same as the supply temperature. When the ratio is negative, the reference temperature is below the supply temperature and when the ratio is positive the reference temperature is above the supply temperature. The reference temperature is used in a temperature controller which is connected to the load valve for adjusting the setting of the valve according to a load demand signal which is chosen to be either the reference temperature if that is less or a demand value which depends on the amount of demand necessary for the process.