Research on thermal performance and hygrothermal behavior of timber-framed walls with different external insulation layer: Insulation Cork Board and anti-corrosion pine plate

Fu, Hongxun; Ding, Yewei; Li, Minmin; Li, Haitao; Huang, Xian; Wang, Zheng

doi:10.1016/j.jobe.2019.101069

Cited by 17 publications

(14 citation statements)

References 19 publications

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“…However, based on the qualification that a material is qualified as insulating material when its thermal conductivity is less than 0.1 W.m −1 K −1 [19], the slight increase in the thermal conductivity values of the natural fiber reinforced PU foams induced by the addition of the fibers will not affect their application as thermal insulators since their thermal conductivity values were still much smaller than 0.1 W.m −1 K −1 . For comparison, the natural fiber reinforced PU foams in this research has lower or comparable thermal conductivity values with the bio-based thermal insulations as reported in previous researches [12][13][14][15]20].…”

Section: Resultssupporting

confidence: 65%

Renewable natural resources reinforced polyurethane foam for use of lightweight thermal insulation

Shao

Zhang

Han

et al. 2020

Mater. Res. Express

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To obtain the energy-saving and environment-friendly lightweight bio-based thermal insulation, polyurethane matrix was incorporated with wood fiber, bamboo fiber, rice husk and liquefied polyol at different percentages (25%, 30%, and 35%). The results revealed that the apparent density for the natural fibers reinforced thermal polyurethane insulation was between 105 kg.m −3 and 178 kg.m −3 by adding 35% of the fibers into the polyurethane matrix. The thermal conductivity of the bio-based thermal insulation ranged from 0.045 to 0.065 W.m −1 K −1 , the addition of the natural fibers increased mechanical strength. The prepared bio-based insulation showed great potential for building thermal insulations with particularly low thermal conductivity (less than 0.065 W.m −1 K −1 ) and self-bearing strength.

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Section: Resultssupporting

confidence: 65%

Renewable natural resources reinforced polyurethane foam for use of lightweight thermal insulation

Shao

Zhang

Han

et al. 2020

Mater. Res. Express

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“… 1 Therefore, it is widely used in household, indoor decoration, and construction fields, such as decorative panels, softened wood flooring, wooden bricks, and softened wood furniture. 2 There is a kind of natural supersoft wood structure in nature, which is cork. It usually refers to the external organization of the trunk of Quercus variabilis or Quercus suber , which is a bark resource with special properties.…”

Section: Introductionmentioning

confidence: 99%

“…Softened wood (SW) generally has the advantages of light weight, low density, good elasticity, high porosity, and compressibility . Therefore, it is widely used in household, indoor decoration, and construction fields, such as decorative panels, softened wood flooring, wooden bricks, and softened wood furniture . There is a kind of natural supersoft wood structure in nature, which is cork.…”

Section: Introductionmentioning

confidence: 99%

Softened Wood Treated by Deep Eutectic Solvents

Yang

Zhou

et al. 2020

ACS Omega

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Due to its good physical properties, softened wood (SW) has been widely used in the fields of home furnishing, interior decoration, and construction, such as decorative panels, softened wood flooring, wooden bricks, and softened wood furniture. However, traditional methods of wood softening often fail to meet the requirements of enterprises for softening wood. Here, inspired by the research related to wood softening, we propose a method for directly preparing softened wood (SW) using a new type of “ionic liquid” eutectic solvent (DES) owing to its low cost, environmental friendliness, recyclability, and other advantages. To improve the adaptability of the study, a total of five types of DESs were designed and prepared, and by the microwave-assisted DES treatment of natural wood (NW), the purpose of softening wood was achieved. Then, we conducted a series of comparative analyses and performance tests on NW and SW, including microscopic images, chemical composition, color difference, and mechanical properties. The results show that the wood softened by DES has become a highly porous network structure, and partial lignin, hemicellulose, and cellulose have been removed. At the same time, different degrees of color change, lower hardness, excellent mechanical flexibility, and a compression rebound rate of up to about 90% are obtained. The above-mentioned various properties of SW provide great potential for its application in wood products.

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“…It was found that the results were nearly the same; they indicated the effects of the insulation materials, moisture content of wooden materials, spacing, and thickness of studs on the heat transfer coefficient of the walls [12]. In the literature, the studies are mainly focused on the hygrothermal performance analysis of insulated timber-framed walls [13][14][15][16]. Most of them are conducted with a combination of both experimental and numerical methods and comparison of the results.…”

Section: Previous Studiesmentioning

confidence: 99%

Hygrothermal performance assessments of traditional timber-framed houses in Turkey by numerical analysis

Alkan¹,

Yazicioglu²

2021

Int. J. EQ

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The aim of this research is to evaluate the hygrothermal performances of traditional timber-framed houses' exterior walls in Turkey to create a base case scenario of hygrothermal behavior as a datum for conservation and restoration projects. There is a unique range of traditional timber-framed houses in Turkey varied according to geographical, social, economic, and cultural characteristics. They are hybrid constructions whereby an infilled timber-framed system is erected on the masonry walls. They are compositions of rectangular studs of wood and infill materials such as adobe, stone, and brick. Most constructed examples may be classified in groups of four depending on infill materials as follows: (1) timber-framed adobe infill, (2) timber-framed brick infill, (3) timber-framed stone infill, and (4) unfilled timber-framed. Within the scope of the research, one example from each type is selected for hygrothermal performance assessments by applying the simulation program DELPHIN 6.1.1. This research is concentrated on the evaluation of hygrothermal performances of the selected types over 4 years (January 01, 2010-January 01, 2014) by investigating the temperature, relative humidity, U-value, and moisture mass model graphics of the cross-section of the wall samples. 2010 was one of the rainiest years and 2013 was one of the less rainy years in the selected locations for the last 10 years. The findings of this paper indicate that when factors such as construction details, materials, and climatic conditions are varied, there may be humidity-based problems in the selected examples. In that case, intersection points of materials, layers, and their relationships should be re-evaluated to improve the hygrothermal performances of the selected walls for conservation and restoration projects.

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Research on thermal performance and hygrothermal behavior of timber-framed walls with different external insulation layer: Insulation Cork Board and anti-corrosion pine plate

Cited by 17 publications

References 19 publications

Renewable natural resources reinforced polyurethane foam for use of lightweight thermal insulation

Renewable natural resources reinforced polyurethane foam for use of lightweight thermal insulation

Softened Wood Treated by Deep Eutectic Solvents

Hygrothermal performance assessments of traditional timber-framed houses in Turkey by numerical analysis

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