Thermal measuring and testing – Calorimetry – Gain or loss of heat by heat utilizing load in path of heat...
Patent
1997-12-31
2000-02-01
Miska, Vit
Thermal measuring and testing
Calorimetry
Gain or loss of heat by heat utilizing load in path of heat...
374 44, 7320417, 7320418, 364557, G01K 1706, G01K 1708, G01N 2518, G06F 1520
Patent
active
060195053
ABSTRACT:
A method and apparatus for providing a more direct approach to determine the thermal conductivity, thermal diffusivity and specific heat of a fluid of interest, independently of the amplitude of the sensor output. This is preferably accomplished by measuring one or more variable phase or time lags between selected input and output AC signals, and directly deriving the thermal conductivity, thermal diffusivity and specific heat therefrom. Such derivation is therefore less dependent than amplitude-based sensors on occasional or unpredictable drift in sensor resistive elements.
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Bonne Ulrich
Kubisiak David
Matthys Robert J.
Schuldt Spencer B.
Honeywell Inc.
MacKinnon Ian D.
Miska Vit
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