Confirmation The Temperature Of Inter Surface Of The Thermal Bridge Of Building And Research Of Methodology Of Exterior Insulation

With the developing of economic and the rising of people's life level, the building witli healing energy consumption is rising sharply. At present ,the heating energy consumption takes one third of the entire energy consumption. So take effective measure to reduce building energy consumption is of great importance to keeping develop and ease the urgent complexion of supply and demand.The subject is a sub subject of a fund subsidy subject of scientific research of Shandong Province, which is "The thermal bridge of building dynamic characteristic and energy consumption analysis"(Number:J03L06). On the basis of expound the theory of building exterior-protected construction energy consumption and the gene of influence the building energy, set up mathematics model, this article discuss the mechanism of dispelling the heat of the buildings' thermal bridge and the complication that influence it, and then synthetic analysis and calculate the influence range of building thermal bridge in exterior-protected construction column thermal bridge to the building outer wall get the conclusion that when the construction column can satisfy the building stress-area, in bulgy construction column dispel less heating than out bulgy construction column. But if the pole stuck out more than 100mm, in bulgy or out bulgy make no difference.In the mathematic calculation, adopt ANSYS software, get four representative thermal bridges' internal temperature distribution and heat-flux get through the thermal bridge and the around outer wall. Present thermal bridge influence area to the building out exterior-protected construction. For the construction column thermal bridge, the influence area increase 100mm along the thermal bridge. The position of maximum heat-flux is between the thermal bridge and the outer wall. Through analysis and calculate, advance the optimal method of exterior heat preservation of outer wall is add 100mm thicken along the thermal bridge, then take heat preservation measure for the whole outer wall. At last ,validate the analysis of building thermal bridge is right through experiment.On the basis of analysis familiar heat preservation peculiarity, advance the best way to reduce building energy consumption is exterior heat preservation of outer wall. Adopt ANSYS software, mimic calculate and then economy analysis, work out that building outer exterior-protected construction. Adopt poly phenyl board as heat preservation materials, and the best heat preservation thickness for thermal bridge is (25+25)mm, for outer wall is 25mm. In this way, it can save 50 percent energy, and at the same time introduce heat preservation materials and the way to use it in common.Through economy analysis it can be known that building outer heat preservation technology not only save more energy, but also create economic benefit.