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. 26, 1993
Filed:
Sep. 22, 1992
Kenneth L Burgers, Woodridge, IL (US);
Arif Y Kiziltug, Naperville, IL (US);
Royce J Laverman, South Holland, IL (US);
William S Schoerner, Plainfield, IL (US);
Liquid Carbonic Corporation, Oak Brook, IL (US);
Abstract
In the method of the invention, an unknown mass fraction (F) of solid cryogen in a stored cryogenic refrigeration system is determined. The method includes the steps of adding mass (T) of a trace substance which is soluble in the liquid phase of the system. The total mass amount (M) of the cryogen in the system is determined at the time of charging the system. The initial mass concentration (C.sub.I) of the trace substance is determined by dividing (T) by (M). During operation of the stored cryogenic refrigeration system, a small sample of the liquid phase cryogen is extracted from the system. The sample is analyzed to determine the new concentration (C.sub.N) of the trace substance in the sample. The new concentration (C.sub.N) of the sample is dependent on the amount of solid cryogen which has been produced in the system. Thereafter, the mass fraction (F) of solid cryogen in the system is determined by solving the equation: