Equivalent thermal conductivity measurement method and equipment for wall material

A technology of thermal conductivity and wall material, applied in the field of wall materials, can solve the problems of long detection period, large influence of human and environmental factors, and inability to intuitively reflect the energy-saving effect of samples, so as to achieve shorter detection period, accurate and efficient equivalent Thermal conductivity, the effect of real and effective energy saving effect

Active Publication Date: 2015-10-21
中国国检测试控股集团西安有限公司
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the equivalent thermal conductivity of wall materials and its measuring equipment, so as to solve the problem that the existing method for measuring the equ...

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  • Equivalent thermal conductivity measurement method and equipment for wall material
  • Equivalent thermal conductivity measurement method and equipment for wall material
  • Equivalent thermal conductivity measurement method and equipment for wall material

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Embodiment

[0054] Prepare a filling body 4 with a known thermal conductivity and a specification of 500mm×500mm×d, where d represents the thickness of the material to be tested in the direction of heat transfer, and the filling body 4 generally chooses a polystyrene board. When the size of the tested piece 3 exceeds 500mm×500mm, it shall be prepared according to 500mm×500mm×d. The material of the tested piece 3 is sintered porous brick or thermal insulation block, etc. When the size of the tested piece 3 is less than 500mm×500mm, A single sample is taken for the test, and the material needs to be dried in advance to a constant quality state.

[0055] The filling body 4 usually selects polystyrene board, and the filling body 4 is installed in the metering box 10 of the wall material equivalent thermal conductivity measuring device of the present invention as the opening of the test area, and the periphery of the filling body 4 is sealed with weather-resistant adhesive, and the installation...

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Abstract

The invention discloses an equivalent thermal conductivity measurement method for a wall material. The method comprises the following steps: placing a filling body in a sealed environment which provides a thermal environment for one side of the filling body and a cold environment for the other side of the filling body, and measuring the heat flux QT passing through the filling body after the temperature in the sealed environment is balanced; embedding a test piece to be measured into the filling body in a sealed manner, re-placing the filling body in which the test piece is embedded in the sealed environment in the step 1, measuring the heat flux QS passing through the filling body in which the test piece is embedded after the temperature in the sealed environment is balanced; acquiring the heat flux Q of a heater according to the heat fluxes QT and QS; calculating to obtain the equivalent thermal conductivity lambda e according to the heat flux Q of the heater. The equivalent thermal conductivity measurement method solves the problems that a conventional equivalent heat conductivity measurement method is long in detection period, is greatly influenced by human and environmental factors and cannot truly and effectively reflect the energy-saving effect of a sample. The invention also discloses equivalent heat conductivity measurement equipment which is simple in structure and convenient to use.

Description

technical field [0001] The invention belongs to the technical field of wall materials, and relates to a method for measuring equivalent thermal conductivity of wall materials and a measuring device thereof. Background technique [0002] Over the years, wall material products have developed from a single clay solid brick to porous bricks, hollow bricks, hollow blocks, thermal insulation bricks, thermal insulation hollow blocks, composite thermal insulation bricks, composite thermal insulation hollow blocks, decorative bricks, pavement bricks and decorative bricks. tile etc. The performance of these wall masonry materials with different raw materials varies according to the production process. The thermal conductivity of the material is one of the important indicators to measure the thermal insulation performance of the product, and its impact on building energy conservation is very critical. Most of the test pieces of building components are heterogeneous, and the heterogene...

Claims

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Application Information

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IPC IPC(8): G01N25/20
Inventor 王博周炫
Owner 中国国检测试控股集团西安有限公司
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