Study on Application Properties of PCM Mortars

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.638-640.1499 ◽

2014 ◽

Vol 638-640 ◽

pp. 1499-1502

Author(s):

Xiao Na Hu ◽

Yin Li

Keyword(s):

Thermal Conductivity ◽

Heat Storage ◽

Thermal Inertia ◽

Lauryl Alcohol ◽

Measuring Instrument ◽

Temperature Level ◽

Storage Coefficient ◽

Temperature Time

Lauryl alcohol mixed paraffin to prepare PCM mortars. Study on the heat storage using DSC equipment; study on the temperature level and temperature time by boilingwater; the DRM-II type "heat storage coefficient measuring instrument is used to check heat storage coefficient,and analysis the thermal inertia through heat storage coefficient and thermal conductivity.

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Resistor Model for Heat Storage Coefficient

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.336.65 ◽

2013 ◽

Vol 336 ◽

pp. 65-72

Author(s):

A.K. Shrotriya

Keyword(s):

Thermal Conductivity ◽

Heat Capacity ◽

Present Model ◽

Heat Storage ◽

Empty Space ◽

Solid Particles ◽

Square Root ◽

Volumetric Heat Capacity ◽

Storage Coefficient ◽

Good Agreement

In thermodynamics, the heat storage coefficient (HSC) β of a material is defined as the square root of the product of the material's thermal conductivity and its volumetric heat capacity. A material's HSC is a measure of its ability to exchange thermal energy with its surroundings. A resistor model has been proposed by us in the following manner. In the case of soil materials, the solid particles are surrounded by fluid, or in the case of vacuum, by empty space. The HSC of such an unconsolidated system will depend on the conditions of porous media: porosity, temperature, HSC of different phases and the structure of the aggregate. The present model also yields values in good agreement with experimental results of other workers.

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Analysis of significant measures for thermal conductivity

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2020-3-35-42 ◽

2020 ◽

pp. 35-42

Author(s):

Yuri P. Zarichnyak ◽

Vyacheslav P. Khodunkov

Keyword(s):

Thermal Conductivity ◽

Heat Flux ◽

Surface Heat Flux ◽

Heat Flux Density ◽

Measurement Method ◽

Conductivity Measurement ◽

Surface Heat ◽

Measuring Instrument ◽

New Class ◽

Achievable Accuracy

The analysis of a new class of measuring instrument for heat quantities based on the use of multi-valued measures of heat conductivity of solids. For example, measuring thermal conductivity of solids shown the fallacy of the proposed approach and the illegality of the use of the principle of ambiguity to intensive thermal quantities. As a proof of the error of the approach, the relations for the thermal conductivities of the component elements of a heat pump that implements a multi-valued measure of thermal conductivity are given, and the limiting cases are considered. In two ways, it is established that the thermal conductivity of the specified measure does not depend on the value of the supplied heat flow. It is shown that the declared accuracy of the thermal conductivity measurement method does not correspond to the actual achievable accuracy values and the standard for the unit of surface heat flux density GET 172-2016. The estimation of the currently achievable accuracy of measuring the thermal conductivity of solids is given. The directions of further research and possible solutions to the problem are given.

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