Combined effects of sorption hysteresis and its temperature dependency on wood materials and building enclosures - Part I: Measurements for model validation

被引：23

作者：

Zhang, Xiaobo ^{[1
,2
]}

Zillig, Wolfgang ^{[2
]}

Kuenzel, Hartwig M. ^{[2
]}

Mitterer, Christoph ^{[2
]}

Zhang, Xu ^{[1
]}

机构：

[1] Tongji Univ, Sch Mech Engn, Inst Heating Ventilating & Air Conditioning, Shanghai 200092, Peoples R China

[2] Fraunhofer Inst Bldg Phys, Dept Hygrotherm, D-83626 Holzkirchen, Germany

来源：

BUILDING AND ENVIRONMENT | 2016年 / 106卷

关键词：

Hygroscopic range; Sorption hysteresis; Temperature dependency; Frandsen's model; Hygrothermal modeling; Wood materials; MOISTURE BUFFERING PERFORMANCE; BEHAVIOR; TRANSPORT;

D O I：

10.1016/j.buildenv.2016.06.025

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Hygroscopic materials such as wood and wood based materials have been widely used as insulation and surface moisture buffering materials due to their low thermal conductivity and high moisture capacity. And their hygrothermal performance is mainly dependent on the moisture properties, such as sorption isotherm and water vapor permeability etc. Instead of a univalued function of relative humidity, sorption isotherm of wood materials is not only affected by sorption history, but also temperature dependent. A heat and moisture transport model is formulated based on local thermodynamic equilibrium assumption, which includes thermal moisture capacity and a hysteresis model in [1]. To validate this model, sorption isotherms at 23 degrees C were measured using the static gravimetric method; and a moisture response test under dynamic boundary conditions was carried out in a climatic chamber. The simulation results show that the hygrothermal model with temperature dependency and sorption hysteresis can capture the dynamic moisture response to variable boundary conditions very well. Therefore, this model could be used to further analyze the individual and combined effects of sorption hysteresis and its temperature dependency through hygrothermal modeling in a companion paper. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：143 / 154

页数：12

共 45 条

[11] A hysteresis model suitable for numerical simulation of moisture content in wood [J].

Frandsen, Henrik Lund ;

Svensson, Staffan ;

Damkilde, Lars .

HOLZFORSCHUNG, 2007, 61 (02) :175-181

[12]

Frandsen HL, 2007, SELECTED CONSTITUTIV

[13]

Goossens E.L. J., 2003, The moisture transfer properties of coated gypsum - PhD Thesis

[14]

Hens, 1996, FINAL REPORT TASK 1

[15] The water vapour sorption properties of Sitka spruce determined using a dynamic vapour sorption apparatus [J].

Hill, Callum A. S. ;

Norton, Andrew J. ;

Newman, Gary .

WOOD SCIENCE AND TECHNOLOGY, 2010, 44 (03) :497-514

[16] The Water Vapor Sorption Behavior of Natural Fibers [J].

Hill, Callum A. S. ;

Norton, Andrew ;

Newman, Gary .

JOURNAL OF APPLIED POLYMER SCIENCE, 2009, 112 (03) :1524-1537

[17]

Holm A.H., 2004, 2004 ANN M AM SOC HE, P820

[18] A two-phase moisture transport model accounting for sorption hysteresis in layered porous building constructions [J].

Johannesson, B. ;

Janz, M. .

BUILDING AND ENVIRONMENT, 2009, 44 (06) :1285-1294

[19]

Johannesson B., 2000, TRANSPORT SORPTION P

[20]

Kelly D.J., 2002, RAPID EXPT METHODS E

← 1 2 3 4 5 →