Experimental thermal characterization of timber frame exterior wall using reed straws as heat insulation materials

Georgescu, Sergiu-Valeriu; Coşereanu, Camelia; Fotin, Adriana; Brenci, Luminiţa-Maria; Costiuc, Liviu

doi:10.1007/s10973-019-08325-2

Cited by 10 publications

(2 citation statements)

References 24 publications

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“…These uses presumably grow due to the EU policies on energy-efficient buildings [75] but the market is dominated by the polyurethanes, polystyrenes, mineral wool and other chemicals, whilst the biobased materials are rarely used because they are perceived as costly and less performing. Nevertheless, the exterior insulation of the building with the reed straw has a similar insulating performance to rock wool and polystyrene [76] and can be improved by the hollow stem reed made durable and fire-proof. Designs for the hollow-stem insulation walls show high insulation performance [77] and avoid hazards of chemicals in production and uses; for example, the smoke of heated chemicals is the main cause of death and injuries during fire disasters.…”

Section: Possibilities For Innovationsmentioning

confidence: 99%

Towards Innovative Governance of Nature Areas

et al. 2020

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How can the governance of nature areas foster the sustainability of ecosystems? This is discussed with regard to larger threats on ecosystems despite larger global nature areas that reach 19 million km2 of land along with larger costs per area unit. Moreover, monetization of nature with payments for ecosystem services is sometimes demanded for justification of the nature areas; however, this does not resolve the threats but faces scientific and ethical scrutiny. An alternative is the governance that incubates sustainable innovations in the nature areas for broad dissemination which generates interests in the sustainability of ecosystems. Opportunities are due to demands for ethical products, ecotourism and images of nature which generate USD 1100 billion in global markets. Sustainable innovations of using reed for insulation walls, furniture panels and upholstery in the EU can generate a few hundred million dollars in addition to present roof thatching, fodder and fuels if good functional qualities of the reed products are developed. Their functionalities can be supported by the inclusive economics, CO2 storage, treatment of water pollution, richer biodiversity, and other ethical qualities. The governance of nature areas can prevent the present deadlock but needs the development of technical and entrepreneurial capabilities.

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Section: Possibilities For Innovationsmentioning

confidence: 99%

Towards Innovative Governance of Nature Areas

et al. 2020

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“…Georgescu et al investigated frame wall elements filled with reed straw. They found that the water evaporation phenomenon, along with the increase in humidity inside the air cavities, increased the thermal conductivity coefficient values because of the more intense movement of the humid air and convection occurrence [2]. Vrana and Gudmundsson compared cellulose and stone wool in terms of moisture properties resulting from condensation and ice formation.…”

Section: Introductionmentioning

confidence: 99%

Moisture Transport in Loose Fibrous Insulations under Steady-State Boundary Conditions

Kosiński

2023

Materials

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This research aimed to compare the transport capacity of loose-fill mineral wool, cellulose fibers, and wood wool to transfer moisture under steady-state conditions. The tests were carried out in the heat flow meter apparatus, which created a constant thermal field, limiting samples of sorptive moistened materials. The thermal conductivity, stabilization time, and moisture content of the samples were measured. Based on the variation in the results, the dynamism of moisture transport in the materials was determined. Mineral wool samples showed the lowest sorption. As a result, the moisture transport in this material stopped the fastest. In the case of cellulose and wood fibers, moisture transport continued throughout the whole test procedure. It was noted that the amount of moisture transport is influenced primarily by the structure of the fibers, the moisture content, and the possible presence of air in the pores. The wetter the material, the faster the transport. The dynamism of moisture transport according to trends of thermal conductivity changes over time was analyzed. The greater the slope of the linear regression line, the greater the dynamics of change. The smallest dynamics of change were found for mineral wool, for which the measured slope was between −0.008 and −0.033. For cellulose and wood wool, the range of slope was from −0.141 to −0.210, and from −0.162 to −0.211, respectively. The results of this research may provide the basis for further work on buffering moisture in the adjacent internal layers of the frame walls.

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