Self-made Thermopile Heat Flow Meter In Detection Of Construction Thermal Performance

The scale of energy consumption for construction in the whole energy consumption occupies increases year by year, the work of construction energy conservation all over the world already has been in full swing. Being an important energy conservation work, the detection of the construction thermal performance has been received the more and more widely value, the corresponding heat flow detection technology and the instrument also has been obtained the great development and the universal application. In view of the construction energy conservation detection, this article concerns the following aspects:Firstly, based on the thermopile principle, a wound rotor plate type heat flow meter was made by the electroplating method.Secondly, a heat conduction meter with the double heat flow meters is selected to calibrate the self-made heat flow meter probe, whose coefficient is calculated and its temperature difference-output thermoelectric force curve is fit as linear to equation, whose result was quite satisfactory. Moreover, the comprehensive errors in the process of calibrating the heat flow meter probe are analyzed about 5%, to provide an evidence for application in engineering practice.Finally, in order to test the utility of the self-made heat flow meter probe, the heat flow meter method with quantitative analysis combining the infrared thermal image technology has been carried on the scene detection to the construction wall. The average heat transfer coefficient of the wall was calculated according to the measured data, and then contrasted with the corresponding theoretical value. The result indicated that detecting accuracy of the self-made the thermopile heat flow meter is lower, so it must be improved further. The influences of exterior factors like the supplying air of the air-conditioning in the house to detecting data were analyzed; the errors influencing the results were discussed.