Apparatuses and methods for measuring and controlling thermal insulation

A measurement method and technology of measurement results, applied in the field of thermal measurement, which can solve problems such as errors, inaccurate listing of thermal conductivity values, deviations in material composition, etc.

Inactive Publication Date: 2010-01-20
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

This first-principle estimate is prone to error from various sources, such as imprecise geometric measurements, or the use of imprecise tabulated thermal conductivity values ​​or the material composition of the actual insulation versus the material whose intrinsic thermal conductivity value is listed in the tabulated There are deviations between the material composition of the

Method used

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  • Apparatuses and methods for measuring and controlling thermal insulation
  • Apparatuses and methods for measuring and controlling thermal insulation
  • Apparatuses and methods for measuring and controlling thermal insulation

Examples

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Embodiment Construction

[0020] refer to figure 1 , the generalized system comprises first and second opposing heat conductors 10 , 12 separated by an intervening medium 14 of relatively lower thermal conductivity. For example, the first and second opposing heat conductors 10, 12 may be metal bodies, films, layers, etc., while the intervening medium 14 may be a dielectric, such as an air gap, foam spacer, or the like. It is desirable to measure the thermal conductance of the intermediate medium 14 with respect to the heat flow between the first and second opposing heat conductors 10 , 12 . Optionally, it is also desirable to measure the heat flux between the first and second opposing heat conductors 10,12.

[0021] In the following, no assumptions are made about the geometry of the first and second opposing heat conductors 10 , 12 or about the intermediate medium 14 . This is in stark contrast to typical approaches used previously that rely on assuming geometrical considerations to be known a priori...

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PUM

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Abstract

A mutual capacitance measurement is acquired for two thermally and electrically conductive bodies separated by an intervening dielectric material. At least one of (i) a thermal conductance and (ii) a heat transfer rate between the two thermally and electrically conductive bodies is determined based at least on the mutual capacitance measurement. For example, a thermal conductance between the two thermally and electrically conductive bodies may be determined as the mutual capacitance measurement scaled by a ratio of the thermal conductivity of the intervening dielectric material and the dielectric constant of the intervening dielectric material.

Description

technical field [0001] The following relates to the field of thermal measurements. Its use in the measurement of temperature, heat flux, thermal conductivity, and related thermometry quantities has special application and is described with specific references. More general applications where these measurements are of value (such as measurements of core body temperature, measurements of heat flux from infants) are found below. Background technique [0002] A common arrangement for thermal control is to wrap or cover a body of relatively high thermal conductivity with insulation, cladding, coating, etc., so as to maintain heat within the body of high thermal conductivity, or to control or inhibit heat outward from the body of high thermal conductivity (or inwards in some cases) pass. A common example of such an arrangement is the living human body, which has a core body temperature maintained at approximately 37°C. The temperature is maintained by thermogenic metabolic proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/34G01K13/00G01N25/18G01N27/22
CPCG01K1/16G01K13/002G01N25/18G01K7/34G01K13/20
Inventor A·V·帕迪
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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