Process and apparatus for the thermal measurement of mass flow
US4339949A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1979 |
| Grant date | Jul 20, 1982 |
| Priority date | — |
| Expiry date | Dec 27, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/684
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A thermal measurement of mass flow is obtained by passing a flowing mass through a hollow passageway, measuring the temperature of the mass at the inlet and at the outlet of said passageway and additionally measuring the heat flow released or absorbed through the walls of the passageway and then determining the mass flow by setting up the heat balance equation on the basis of the obtained data. Preferably, the data are fed into a computer to solve the resulting heat balance equation. The invention also comprises an apparatus wherein temperature sensors are arranged at both ends of a tubular passageway and wherein the heat flow meter comprises concentric wire coils of a thermic resistance material wound around the outer periphery of the tube and an interposed layer of predetermined thickness formed of a material of at most moderate heat conductivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.