Thermal measuring and testing – Determination of inherent thermal property – Thermal conductivity
Reexamination Certificate
2008-04-01
2008-04-01
Verbitsky, Gail (Department: 2855)
Thermal measuring and testing
Determination of inherent thermal property
Thermal conductivity
C374S110000, C374S102000, C374S148000
Reexamination Certificate
active
10536855
ABSTRACT:
The invention relates to a method and a device for the continuous measurement (30) of the thermal conductivity of a multifunctional fluid. The inventive method consists of: placing a sample of the multifunctional fluid in a space (31) which is defined by an inlet face and an outlet face; transmitting at least one very brief pulse of a heat flux to the sample via the inlet face, using a laser (40); measuring the heat wave at least three points which are spaced out inside the sample; using at least three temperature sensors (S1, S2, S3) in order to determine the change in the temperature of the multifunctional fluid as a function of time at the three spaced-out points inside the sample; deducing the thermodynamic characteristics of the sample from the aforementioned temperature change and calculating the thermal conductivity from equation (I), wherein T represents thermal conductivity which is dependent on temperature, t represents thermal diffusivity which is dependent on k and which is equal to k(T)/ρ*Cp, ρ and Cp representing mass density and specific heat.
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Gobbe C et al: “Mise en Oeuvre de la Methode Flashe Pour la Mesure de Diffusivite Thermique Sur Des Materiaux Liquides ou Fondus en Fontcion de la Temperature. Application AUX Polymeres” Revue de Physique Apploquee, Les Editions de Physique. Paris, FR, vol. 24, No. 12, Dec. 1, 1989, pp. 1119-1128, X000080289 p. 1119, col. 1—p. 1120, col. 2 p. 1121, col. 2, paragraph 2.1—p. 1122, col. 2.
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Egolf Peter Williams
Sari Osmann
Davis & Bujold & Daniels, P.L.L.C.
Haute Ecole d'Ingénierie et de Gestion du Canton de Vaud
Jagan Mirellys
Verbitsky Gail
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