Method for detecting heat transfer resistance/heat transfer factor of building enclosure structure by infrared thermal imaging system

Abstract

The present invention relates to a method which uses the infrared thermal imaging system for quantitative-detecting the heat conducting resistance/heat transfer coefficient of the building enclosure structure. The energized electric heating wire is used for identifying on the selected area of the surface of the enclosure structure; the electric thermoscope is used for measuring the temperature of the identified area; taking the picture of the identified area with the infrared thermal imaging system and the infrared thermal image atlas of the area is obtained, measuring the indoor and outdoor temperature with the electronic thermoscope and recording; executing analysis process to the infrared thermal image atlas with the image analyzing software of the infrared thermal imaging system to obtain the value of (1), substituting into the formula (2) and the average heat conducting resistance R0 of the building enclosure structure is obtained, and the average heat transfer coefficient of the enclosure structure is calculated with the formula (3). The invention has the advantages of flexible infrared thermal image shooting, low requirement to the experiment condition, quick testing, accurate data, overcoming the defect of big error when the data is tested with heat flow meter method and the requirement to the batch meter and insulating box in the hot box method.

Description

technical field [0001] The invention relates to a detection method of a building enclosure structure, in particular to an on-site detection method for quantitatively detecting the heat transfer resistance / heat transfer coefficient of a building enclosure structure by using an infrared thermal imager. Background technique [0002] With the in-depth development of building energy conservation work, the on-site inspection of building energy conservation will face unprecedented challenges. Judging from the current domestic situation, the heat flow meter method and the hot box method are mostly used to detect the heat transfer resistance / heat transfer coefficient of building envelope structures on site. [0003] The heat flow meter method is based on the premise of one-dimensional steady-state heat transfer, by detecting the heat flux density of the heat flow meter and the temperature difference between the two sides of the masonry, according to the formula: R=Δt / q to calculate t...

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Problems solved by technology

Frequent extrusion is likely to damage the working condition of the heat flow meter, but it is not easy to know whether the working condition of the heat flow meter is normal, because the calibration of the heat flow meter is not easy to operate, so the reliability of the data is very high. Difficult to guarantee

[0006] 3. When the heat flow meter method is used for detection, it is ne...

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