Development of the random simulation model for estimating the effective   thermal conductivity of insulation materials

doi:10.1016/j.buildenv.2014.05.033

CORC > 北京大学 > 工学院

	Development of the random simulation model for estimating the effective thermal conductivity of insulation materials
	Ji, Ru ; Zhang, Zuotai ; Liu, Lili ; Wang, Xidong
刊名	building and environment
	2014
关键词	Thermal conductivity Random simulation model Foamed concrete Lightweight concrete Multiphase LIGHTWEIGHT CONCRETE ENERGY-CONSUMPTION FOAMED CONCRETE BUILDING STOCK SUSTAINABILITY EFFICIENCY WALL
DOI	10.1016/j.buildenv.2014.05.033
英文摘要	This paper developed a new random model to simulate the microstructures and the effective thermal conductivities (k(e)) of the insulation materials based on the assumption of either two phases or multi-phase. To support the validity of the proposed approach, comparisons with experiments were made. These experiments can be divided into two kinds: the first one is the foamed concretes (FC) with a range of bulk densities from 354 kg/m(3) to 1341 kg/m(3), which are manufactured by the pre-foaming type; and the second one is the lightweight concretes (LWC) with densities ranging from 526 kg/m(3) to 1895 kg/m(3), which are made up of Portland cement (PC) and expanded perlite (EP). For the comparison with the simulation results, the ke was measured by a guarded hot plate apparatus (GHP). The results indicated that the simulation results of ke by the present model are in good agreement with the experiment values. For each sample, ke increases with the increase of the bulk density of the sample. Moreover, the degree of ke decrease becomes small in the lower bulk densities. In addition, the present model gives a detailed description of the heat transfer behavior in the insulation material. (C) 2014 Elsevier Ltd. All rights reserved.; Construction & Building Technology; Engineering, Environmental; Engineering, Civil; SCI(E); EI; 2; ARTICLE; jiru@pku.edu.cn; zuotaizhang@pku.edu.cn; liu-0806@163.com; xidong@pku.edu.cn; 221-227; 80
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/208431]
专题	工学院
推荐引用方式 GB/T 7714	Ji, Ru,Zhang, Zuotai,Liu, Lili,et al. Development of the random simulation model for estimating the effective thermal conductivity of insulation materials[J]. building and environment,2014.
APA	Ji, Ru,Zhang, Zuotai,Liu, Lili,&Wang, Xidong.(2014).Development of the random simulation model for estimating the effective thermal conductivity of insulation materials.building and environment.
MLA	Ji, Ru,et al."Development of the random simulation model for estimating the effective thermal conductivity of insulation materials".building and environment (2014).