Device and method for testing thermal performance of sintered heat-insulating hollow blocks and external heat-insulating boards

Abstract

The invention discloses a thermal property testing device and a thermal property testing method of a sintering heat-preservation hollow block and an external heat-preservation plate. The device comprises a constant-temperature box body, a heater, a sealing cover plate, a first movable type side plate and a second movable type side plate, wherein a space formed by encirclingby a bottom plate of the constant-temperature box body, the first movable type side plate and the second movable type side plate is a testing cavity for putting the sintering heat-preservation hollow block and the external heat-preservation plate; the top of the testing cavity is detachably connected with a movable cover plate; the heater is arranged inside the constant-temperature box body; a temperature controller, an thermal infrared imager and a thermometer are arranged outside the constant-temperature box body. The method comprises the steps ofassembling the testing device; measuring and recording temperature data; and calculating equivalent heat conductivity coefficients. The thermal property testing device and the thermal property testing method can be conveniently realized, a testing site can be greatly saved, the use and the operation are convenient, the testing expense is low, the requirement on the thermal property test can be met well, and a test result with a relatively high reference value can be obtained,the practicability is high,and popularization and application are convenient.

Description

technical field [0001] The invention belongs to the technical field of building thermal engineering, and in particular relates to a thermal performance testing device and method of a sintered thermal insulation hollow block and an external thermal insulation board. Background technique [0002] At present, my country's existing construction area has reached 42 billion m 2 , and still maintain about 2 billion m 2 / year huge growth rate. The total energy consumption of buildings is about 870 million tons of standard coal per year, accounting for nearly one-third of the total energy consumption of the society. About 80% of the heat consumption of buildings is mainly transmitted in or out through external wall heat transfer. In the process of the country's active promotion of wall reform, sintered thermal insulation hollow blocks with thermal insulation, light weight, large size, and high porosity came into being. It uses shale as the main raw material, and fly ash, sawdust, s...

AI Technical Summary

Problems solved by technology

[0003] The traditional methods for measuring the heat transfer coefficient of the wall mainly include: the heat flow meter method, the calibration hot box method and the protective hot box method. The heat flow meter method can only test the temperature value of a certain area or a certain point on the surface of the wall, and cannot reflect the temperature of the wall. The temperature of the entire surface; in addition, the deficiency of the hot box method is also obvious, because the environment is changing all the time, so it is not suitable to use the calibration hot box method, and if the protective hot box method is used, it is not suitable for field work, because it needs to use A large protective box or heating the entire building to be tested, so that the equipment is large and numerous, and the test cost of the traditional measurement method is also high

Images