Thermal Properties of Insulation Boards Made of Tree Bark &amp; Hemp Residues

Ninikas, Konstantinos; Ntalos, George; Hytiris, Nicholas; Skarvelis, M.

doi:10.5755/j01.sace.24.1.23236

Cited by 6 publications

(11 citation statements)

References 7 publications

(10 reference statements)

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“…Insulation was seen as a passive strategy to reduce the energy consumption on a building, with findings revealing at least a 25.2% (straw bales) and at most a 25.8% (hemp wool) reduction in annual energy consumption. Recent studies [13,[32][33][34][40][41][42][43] also showed the correlation between energy consumption reduction and the use of the appropriate insulation material, confirming our findings, which reveal that the energy reduction depends first on the type of insulation material used. However, other parameters can affect this reduction such as the thickness of the insulation layer used.…”

Section: Importance Of Office Building Insulationsupporting

confidence: 91%

“…Tree bark was explored in [31] as an insulating filling material in exterior wood frame wall structures, resulting in a possible thermal insulator, while pine tree bark and cannabis residues combined with two different adhesives created boards with excellent insulating qualities [32]. Due to its low density, extremely strong thermal insulation qualities, a large percentage of cork cells, high chemical extractives content protecting against microbes, and low flammability [13,33], tree bark is appropriate for thermal insulation material.…”

Section: Literature Reviewmentioning

confidence: 99%

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Comparative Study of the Impact of Bio-Sourced and Recycled Insulation Materials on Energy Efficiency in Office Buildings in Burkina Faso

Zoure

Genovese

2023

Sustainability

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This research presents a comparative study of different bio-sourced and recycled insulation materials and their impact on energy consumption of office buildings located in Ouagadougou, a city with a dry hot climate. A thorough assessment of the country’s meteorological and urban development data from 2004 to 2018 was conducted for climatic data. EnergyPlus was used for thermal comfort based on the American Society of Heating, Refrigerating, and Air-conditioning Engineers Standard (ASHRAE) 55 adaptive comfort model and energy analysis by calculating and comparing the yearly energy consumption, heat transfer through the building envelope, and discomfort degree hours. A four-story “H”-shaped office building made of cement blocks with a fixed north–south orientation and a 30% window-to-wall ratio served as the base case for this study to perform two rounds of multiple simulations and evaluate the most effective insulation material. First, exterior walls were insulated, and then the roof and inner floors were insulated using the best material from the first round. The findings confirmed hemp wool as the best performing bio-sourced insulation material, which reduces by 25.8% and 17.7% the annual cooling energy demand at 114,495 kWh and the annual energy consumption at 203,598 kWh, respectively, contributing to saving up to 43,852 kWh in annual energy consumption. Hemp wool impacted wall, roof, and internal floor heat transfer by reducing them by 90.86% at 12,583 kWh, 85.1% at 6666 kWh, and 88.1% at −2664 kWh, respectively, while the discomfort degree hours were reduced by 17.6% at 9720.12. The outcomes provide patterns, explanations, and inferences that may be generalized to other projects in Burkina Faso, especially, and sub-Saharan African countries, in general, where most buildings are not well insulated. The availability of these bio-based and recycled insulation materials may also serve as proof to foster a circular economy in the Burkina Faso construction industry.

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Section: Importance Of Office Building Insulationsupporting

confidence: 91%

Section: Literature Reviewmentioning

confidence: 99%

Comparative Study of the Impact of Bio-Sourced and Recycled Insulation Materials on Energy Efficiency in Office Buildings in Burkina Faso

Zoure

Genovese

2023

Sustainability

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“…The thermal performance of this board was also competitive with an average thermal transmittance of 0.30 W/mK when compared to existing commercial oil based insulation panels [20]. Ninikas et al studies the thermal properties of insulation boards that were made of hemp residues and tree bark [21]. However, their mechanical properties were not addressed, and the determination of the thermal conductivity was based on a different measurement setup, as described later in the paper.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Mechanical Properties of Green Insulation Composites Made from Cannabis and Bark Residues

et al. 2021

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The objective of this paper was to investigate the technical feasibility of manufacturing low density insulation particleboards that were made from two renewable resources, namely hemp fibers (Cannabis sativa) and pine tree bark, which were bonded with a non-toxic methyl cellulose glue, as a binder. Four types of panels were made, which consisted of varying mixtures of tree bark and hemp fibers (tree bark to hemp fibers percentages of 90:10, 80:20, 70:30, and 60:40). An additional set of panels was made, consisting only of bark. The results showed that addition of hemp fibers to furnish improved mechanical properties of boards to reach an acceptable level. The thermal conductivity unfavorably increased as hemp content increased, though all values were still within the acceptable range. Based on cluster analysis, board type 70:30 (with 30% hemp content) produced the highest mechanical properties as well as the optimal thermal conductivity value. It is concluded that low density insulation boards can be successfully produced using these waste raw materials.

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“…Cannabis insulation panel is one of the most environmentally friendly insulation materials (Ninikas et al 2019). Cannabis comes from a fast-growing annual plant called Cannabis sativa.…”

Section: Cannabis Panelmentioning

confidence: 99%

Firewater toxicity after extinguishing natural-based insulation materials

Hybská

Osvaldová

Horváthová

et al. 2022

BioRes

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Water is the most widely used fire extinguishing agent. It is used to eliminate a wide range of fires, often occurring in ecologically sensitive areas. There is little information on the toxicity of the fire-fighting substances in connection with aquatic and terrestrial organisms. Toxic substances often present in fire waters slow down life processes. As a result, some organisms die. This study deals with the extinguishing of burning solids (fiberboard, cannabis, straw, cork) with extinguishing water and assessment of its effects on the aquatic and terrestrial environment. The following test organisms were selected to test the effects of the extinguishing water: Daphnia magna – consumer; and Sinapis alba and Lemna minor – producers. A preliminary test was carried out on all the samples to evaluate the (positive / negative) effects of the fire water on the test organisms. Specific conductivity, pH, and chemical oxygen demand were also determined. The results of this study call attention to negative impacts of extinguishing water on the environment. It is necessary to pay attention to prevention and thus eliminate potential risks. If environmental contamination can no longer be prevented, the spread of contaminated water must at least be reduced.

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Thermal Properties of Insulation Boards Made of Tree Bark & Hemp Residues

Cited by 6 publications

References 7 publications

Comparative Study of the Impact of Bio-Sourced and Recycled Insulation Materials on Energy Efficiency in Office Buildings in Burkina Faso

Comparative Study of the Impact of Bio-Sourced and Recycled Insulation Materials on Energy Efficiency in Office Buildings in Burkina Faso

Thermal and Mechanical Properties of Green Insulation Composites Made from Cannabis and Bark Residues

Firewater toxicity after extinguishing natural-based insulation materials

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