Thermal property and economic analysis of the Moka blocks composite insulation wall
With the development of ultra-low energy consumption buildings,near zero energy consumption build-ings,and zero energy consumption buildings,new exterior wall enclosure structures have been widely studied and valued.As a new type of self-insulation wall technology,Moka blocks have been piloted and applied in some developed areas in China,such as Shanghai and Jiangsu.But there is no corresponding standard at present,and its thermal property and economy are still in lack of systematic research.This paper takes a public building in a hot summer and cold winter area as an example,and uses DeST energy consumption simulation software to estab-lish a three-dimensional analysis model of traditional external insulation walls and Moka blocks composite insula-tion walls.The thermal property under four different types of insulation materials in the blocks,including ex-panded polystyrene board(EPS),rock wool board(RW),polyurethane board(PU)and extruded polystyrene board(XPS),and six different thicknesses(30,50,70,90,110,130 mm)are studied.Furthermore,the economic analysis of the blocks composite insulation wall under different working conditions is carried out by using net present value.The results show that the insulation effect of polyurethane board is the best under the same insu-lation thickness.The net present value corresponding to the thickness of different insulation materials shows a trend of first increasing and then decreasing.Combined with the net present value and energy efficiency,the optimal thicknesses is 70,70,40,and 60 mm,respectively.The corresponding energy saving rates are further reduced by 7.08％,6.81％,5.1％,and 6.5％in addition to reaching the 65％standard of building energy efficiency in China.
exterior wall insulationwall constructionDeSToptimal thicknessnet present value
万方数据
维普
