Measuring and testing – Volume or rate of flow – Thermal type
Patent
1979-12-27
1982-07-20
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Thermal type
G01F 168
Patent
active
043399495
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.
REFERENCES:
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patent: 2193762 (1940-03-01), Hirch et al.
patent: 2728225 (1955-12-01), Skibitzke
patent: 2994222 (1961-08-01), Laub
patent: 3238775 (1966-03-01), Watts
patent: 3336804 (1967-08-01), Poppendiek et al.
Kessie, "The Design and Construction of Thermal Flowmeters", in Argonne National Laboratory Report ANL-6531, 3/62, pp. 1-3.
Bahner Friedrich
Pleva Harry
Babcock-BSH AG
Goldstein Herbert
Striker Michael J.
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