Hygrothermal behaviour of flax shives used as insulation material in an attic of a traditional house

Brachelet, Franck; Asli, Mounir; Antczak, Emmanuel; Brue, Flore; Defer, Didier; Lucas, Alain

doi:10.1051/matecconf/202030701017

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…The properties of the materials used for simulation are listed in Table 1. The properties were adopted based on the built-in database of the Delphin 6.1 program or based on [30,31,35,36].…”

Section: Methodsmentioning

confidence: 99%

Practical Use of Materials of Natural Origin as Loose-Fill Insulations in Open-Diffusion Constructions—Observation and Numerical Simulation

Kosiński,

Patyna

2024

Sustainability

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The increasing requirements concerning the consideration of the environmental impact of building materials, along with the simultaneous preservation and enhancement of building thermal parameters, have led to a surge in interest in insulations based on organic or recycled materials. Despite the growing interest in these materials, there remains a scarcity of scientific studies regarding their hygrothermal properties. Within the scope of the research described in the text, the insulation properties of loose-fill materials (hemp shives, cellulose fibers, loose wood wool, and mineral wool as a reference) in wooden frame walls were analyzed. The authors simulated walls with the same U value filled with these materials using Delphin 6.1 software. The simulation time was 3 years, considering the appropriate climatic conditions of Olsztyn and different microclimatic conditions inside the rooms. Insulations made of natural organic can absorb and reveal moisture to the internal environment, while mineral wool transports the moisture to the outside, which may cause condensation problems. Insulations made of hemp shives or wood wool do not increase the level of accumulated moisture over time, which results in thermal stability. In contrast, cellulose and mineral wool store more moisture, which in wet conditions increases the heat flux by 6.9% and 5.2%, respectively.

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“…The properties of the materials used for simulation are listed in Table 1. The properties were adopted based on the built-in database of the Delphin 6.1 program or based on [30,31,35,36].…”

Section: Methodsmentioning

confidence: 99%

Practical Use of Materials of Natural Origin as Loose-Fill Insulations in Open-Diffusion Constructions—Observation and Numerical Simulation

Kosiński,

Patyna

2024

Sustainability

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“…Flax is mainly used for the production of fabrics. It was used as an insulation material in attics of houses by Brachelet et al [ 9 ] They divided their work into two parts where the first part was based on the thermal characteristic of flax shives and the second part was based on analyzing its insulating behaviour. Dubois et al [ 10 ] have fabricated flax shives based on a lightweight composite with rapid hardening of about less than 30 min.…”

Section: Introductionmentioning

confidence: 99%

A sustainable bio‐adsorbent for thermal energy storage for space heating applications

et al. 2022

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Thermal energy storage is an emerging technology that allows the storage of heat when it is available, which can be used later. One of the available technologies for thermal energy storage is the adsorption of moisture from air by adsorbents. Several adsorbents have been studied in the literature for this application, but there is a need for a sustainable adsorbent that can be ecofriendly, cost effective, and available for scale-up for commercialization of the technology. The current paper focused on the synthesis of a flax shives-based composite (equal weight percent of flax shives and salt hydrates) prepared by the impregnation method and its application in thermal energy storage. The composite showed durability, stability, and reasonable energy storage density with a very low cost per unit of energy. The structural characterization of the hybrid was performed by scanning electron microscopy (SEM)/energydispersive X-ray spectroscopy (EDX). The thermal energy storage density, as well as the charging/discharging characteristics were measured using a laboratory-scale thermal energy storage apparatus. The flax/CaCl 2 /LiCl hybrid showed reasonable energy storage density at 74 kWh/m 3 for 50% inlet relative humidity after regeneration at 120 C. Although the energy storage density was not high, the flax/CaCl 2 composite was found to be the most cost-effective material, as it showed the lowest cost per energy stored at 0.98 CAD/kWh at 50% relative humidity (RH) after regeneration at 120 C.

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Towards sustainable development goals and role of bio-based building materials

Aghamohammadi¹,

Shahmohammadi²

2023

Bio-Based Materials and Waste for Energy Generation and Resource Management

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Hygrothermal behaviour of flax shives used as insulation material in an attic of a traditional house

Cited by 4 publications

References 8 publications

Practical Use of Materials of Natural Origin as Loose-Fill Insulations in Open-Diffusion Constructions—Observation and Numerical Simulation

Practical Use of Materials of Natural Origin as Loose-Fill Insulations in Open-Diffusion Constructions—Observation and Numerical Simulation

A sustainable bio‐adsorbent for thermal energy storage for space heating applications

Towards sustainable development goals and role of bio-based building materials

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