Equivalent thermal conductivity measurement method and equipment for wall material

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...

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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 equivalent thermal conductivity of wall materials has a long detection cycle and is greatly affected by human and environmental factors, which cannot be true and effective. The problem of the energy-saving effect of the intuitive response sample

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