Energy Saving Effect Of Exterior Insulation Wall Of Residential Building In Hot Summer And Cold Winter Zone

Building exterior wall caused by energy consumption in the building energy consumption occupies a large proportion,its good thermal performance is to ensure that building is suitable for indoor thermal environment and comfort important guarantee, the system of exterior walls to reduce building energy consumption is of great significance. At present, the building exterior wall as the main body of research,mainly concentrated in the energy saving effect of different forms of exterior wall thermal insulation as well as the optimum direction of exterior wall thermal insulation layer thickness. However, "the external wall thermal insulation energy-saving" study is less, the lack of clear associated boundary conditions. Especially in hot summer and cold in winter, hot summer and cold winter region, "energy saving" characteristics of external wall external thermal insulation study rare reports!In this article, in hot summer and cold winter area residential building external wall thermal insulation energy-saving effect factors were studied. First, analyzed the indoor temperature, heating air conditioning period length as well as can use patterns to the influence of building energy consumption, second, analyzed the single factor and multiple factors on different exterior insulation layer thickness under the action of the influence of the building annual energy consumption, get the corresponding heating period, air conditioning period of building energy consumption and the simulation results of the annual energy saving rate, the following conclusions are drawn: under the industry standard,exterior insulation thickness (the smaller the coefficient of heat transfer), the greater the summer air conditioning energy consumption and energy consumption of winter heating period is reduced; Exterior insulation thickness with the reduction of heating of the air conditioning period indoor calculation temperature for summer air conditioning period and growing energy saving effects of the winter heating period. Compared with the industry standard, the standard of northern Zhe jiang province and the national have regulation to heating calculation period shortened the 27 days, 54 days, exterior insulation effect of building energy efficiency will decrease in winter. In combination with hot summer and cold winter region of intermittent chamber with characteristics, exterior insulation thickness as the heating period indoor temperature rise, impact on the energy saving effect of the winter heating period increases gradually, but the summer air conditioning period of "energy saving" is more prominent. When certain insulation layer thickness,each under the insulation layer thickness is a critical air conditioning period of the "energy saving" temperature, its swaps refrigeration set temperature is smaller than critical temperature air conditioning period, building air conditioning refrigeration is energy-saving, but its swaps refrigeration set temperature is greater than the critical temperature, air conditioning refrigeration will be an "energy saving"!This article selects the increasing to 20 mm,a total of seven categories of EPS thermal insulation thickness, start-stop range is 20 mm to 140 mm, the corresponding period of the critical air conditioning energy saving calculation temperature 27.1 ?,27.3 ?,27.3 ? and 27.3 ?,27.3 ? and 27.4 ?,27.3 ?.Finally, by solar radiation mechanism of building thermal environment analysis,carried out the numerical simulation of building energy consumption under different solar radiation intensity, deeply analyzes the south outer wall heat conduction, found the sun radiation, the influence of the external wall of cold and hot load affect building energy consumption. Combining with shaoxing big laboratory construction of the building of the full-scale model, based on common solid sintering brick wall group, fluorocarbon resin is stuck outside heat preservation of decorative wall as the experimental group, the climate in hot summer and cold winter region exterior insulation system energy saving effect of related experimental study. And compared with the baseline group, experimental group in the center of the wall outside summer conditions, the inner surface temperature is greatly reduced, and in winter conditions varies with the radiation intensity. At the same time, by measuring the heat flux from the exterior wall to the interior, found that the experimental group significantly lower the heat flux, and the outer wall heat flux decrease amplitude increases with the radiation intensity. In addition, the experimental group was more than 10 percent more than the baseline group in each steady-state condition. Therefore, the exterior wall of a certain thickness of exterior wall insulation wall is in the summer heat and winter cold region climate has the good thermal insulation effect, the building energy saving and reducing consumption have significant contribution.