Heat flux sensor with minimal impact on boundary conditions

Saidi, Arash; Kim, Jungho

doi:10.1016/j.expthermflusci.2004.01.004

Cited by 18 publications

(4 citation statements)

References 5 publications

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“…5 shows the temperature measured by the 4 RTDs of the thin film HFS implemented between two stainless steel parts and half the applied heat flux at the heater. The temperature measurements are used to compute the heat flux evolution using the function specification method [7,12]. An algorithm solving the 1D heat conduction equation and using function specification method has been implemented with the Matlab software, considering a stainless steel part with constant thermal properties (k = 13.4 W.m -1 .K -1 , ρ = 7900 kg.m -3 and e = 15 mm).…”

Section: Implementation and Testing Of Hfs Performancesmentioning

confidence: 99%

Temperature Coefficient of Thin Film Resistance Temperature Detectors for Improved Heat Flux Sensors

Azerou

Garnier

Lahmar³

2013

AMM

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The measurement of thermal properties or internal or external boundary conditions requires temperature and heat flux data. Both information can be provided by heat flux sensors. The one consisting in measuring temperature at various locations within the wall and using inverse method to estimate wall temperature and heat flux is among those providing the lowest measurement bias for transient heat flux measurement. However, this very accurate sensor requires time consuming technical work for microthermocouples implementation and due to the welding, one cannot locate precisely the temperature measurement. The idea developed in this work is to replace the wire microthermocouples by thin film resistance temperature detectors deposited on polymer substrate in order to ease the fabrication and to increase the accuracy of heat flux sensor. As the deposited sensors are RTDs, a preliminary study is performed showing the effect of the metal as well as the processing conditions on the electrical resistivity and temperature coefficient of copper and aluminum thin film

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Section: Implementation and Testing Of Hfs Performancesmentioning

confidence: 99%

Temperature Coefficient of Thin Film Resistance Temperature Detectors for Improved Heat Flux Sensors

Azerou

Garnier

Lahmar³

2013

AMM

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“…On the contrary, other studies have studied alternative techniques for minimizing the influences of the measurement apparatus and the boundary conditions on the heat flow through the surface. For instance, Saidi and Kim [15] proposed a heat flux sensor that measures both heat transfer and temperature with minimal effect on the wall's thermal boundary condition since the passive temperature sensor is very thin. Cucumo et al [16] studied the degree to which the heat flux of external walls is deflected by heat flux sensors due to their different thermal conductivity.…”

Section: Introductionmentioning

confidence: 99%

A Dimensionless Study Describing Heat Exchange through a Building’s Opaque Envelope

Balocco,

Pierucci,

Piselli

et al. 2024

Sustainability

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The urban environment represents one of the main contexts in which natural resources are exploited to support intensive human activities, especially from an energy perspective. In this context, there is still a lack of general methodologies/tools which can be used to understand the behavior of buildings and to prove their sustainability under real operating conditions, depending on their location, construction characteristics and materials, plants, external conditions, and conduction. In this research, the Buckingham theorem is applied to the thermophysics of buildings, describing the heat transfer of opaque surfaces in a transient regime. The abstraction of dimensionless numbers merges the main phenomena of interest, such as thermal conduction, convection, and radiation, enhanced by consideration of the surface sun–air temperature and the external air temperature. The parameters themselves were mutually matched through a proper equation, whose coefficients were determined by a regression analysis of the measurements from an intensive experimental campaign investigating a building in Florence for 3 years. The resulting correlation shows a good agreement with the available dataset and a determination coefficient of over 70%. Therefore, the proposed approach, owing to the generalization of the dimensionless numbers, suggests the possibility of sustainability estimates, from an energy point of view, of envelope/plant/user systems, including assessments at a higher scale than that of a single building.

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“…They used the Gardon gauge sensor as their heat flux sensor. Meanwhile, research work by Arash Saidi et al 7) measured the heat transfer on the far surface based on measuring the heat flux and temperature on the near wall. With all those researches, we can conclude that the concept of the radiometer is suitable as heat flux research apparatus.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Heat Gains from Flat Plate Heater Measured using Multi-Axis Heat Flux Sensors

Fauzan¹,

Ega²,

Sigalingging³

et al. 2021

Evergreen

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Thermal energy transfer is a phenomenon that has many benefits in its application to meet human needs through conduction, convection, and radiation. This research work will reconstruct a thermal radiation process using a radiation thermal measurement apparatus. This apparatus has been designed with several features that will measure many conditions. This research analyzes the effect of thermal inertia in the measurement process, compares the measurement result with and without the darkroom, and measures the heat flux received with different tilt angles to unknowing the effect of convection in the apparatus and the measurement results. In particular, this work will analyze the heat gains from a flat plate heater. In addition, the apparatus can also be used as a comprehensive heat transfer learning media.

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Heat flux sensor with minimal impact on boundary conditions

Cited by 18 publications

References 5 publications

Temperature Coefficient of Thin Film Resistance Temperature Detectors for Improved Heat Flux Sensors

Temperature Coefficient of Thin Film Resistance Temperature Detectors for Improved Heat Flux Sensors

A Dimensionless Study Describing Heat Exchange through a Building’s Opaque Envelope

Analysis of Heat Gains from Flat Plate Heater Measured using Multi-Axis Heat Flux Sensors

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