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:
Aug. 11, 1998
Filed:
Dec. 22, 1995
Peter Baumann, Sulz, CH;
Francisco L Blangetti, Baden, CH;
Asea Brown Boveri AG, Baden, CH;
Abstract
In the case of the method for determining the total mass flow of a gas mixture (2) which flows through a line (1) under pressure, a gas contained in the gas mixture is used as tracer (3). With the aid of pressure measurements (9, 10) of the gas mixture, total pressure and of the tracer partial pressure, the molar proportions of the tracer in the gas mixture are first ascertained. In this case the pressure measurements take place during a first phase, with the line system (1) gas-tight, and in a further phase with the system enriched with tracer. Solving the mass balances for the gas mixture and for the tracer makes it possible, by substituting the already determined tracer molar proportions, to calculate the total mass flow. Tracer enrichment of the gas mixture is carried out at supercritical pressure ratios between the vacuum prevailing in the line and the pressure of the tracer to be fed in by a critical orifice (4) which is built into the line (1) upstream of the pressure measurement locations (9, 10).