Physical incorporation of particles in a porous media: a path to a smart wood

Zerriaa, Azza; Ganaoui, Mohammed El; Gérardin, Christine; Tazibt, Abdel; Gabsi, Slimane

doi:10.1051/epjap/2015150458

Cited by 8 publications

(6 citation statements)

References 14 publications

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“…As energy savings become an inevitable part of modern buildings, synergy between BPCM and wood comprises various options, e.g. wood flour [13,14], and surface treatment of solid wood and wood composites [15][16][17] to host the BPCMs.…”

Section: Introductionmentioning

confidence: 99%

Solid wood impregnated with a bio-based phase change material for low temperature energy storage in building application

Nazari

Jebrane

Terzıev

2022

J Therm Anal Calorim

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Wood impregnated with a multicomponent mixture of fatty acids as a bio-based phase change material (BPCM) to improve its thermal characteristics was studied. The studied wood/BPCM composites can be used as internal elements in buildings for energy storage. Scots pine and beech sapwood were impregnated with a multicomponent mixture of linoleic acid and coconut oil fatty acids at a ratio of 20:80. Leakage test was conducted and revealed that the maximum leakage for pine and beech were 9 and 8%, respectively. Light microscopy was employed to demonstrate the distribution of the BPCM in the wood structure. Rays in both pine and beech wood served as pathways for impregnation of the BPCM to partly fill the tracheid lumens (pine) and vessels (beech). Thermal characterization of the studied samples employed T-history and DSC methods, concluding that the impregnated wood had significant thermal mass, ability to store excessive energy in terms of latent heat and keep the temperature constant for long time. The specific heat capacity of the impregnated samples was 4–5 J g−1 K−1 i.e., higher than that of the untreated control samples of ca. 2 J g−1 K−1. The thermal conductivity of the samples before and after the impregnation was measured using heat flow meter method and the results showed that the untreated beech wood had higher thermal conductivity compared to pine and the parameter improved when the cell lumens were filled with the BPCM. Scots pine wood with to 80% mass percentage gain (MPG) after impregnation demonstrated an increment in thermal conductivity of 33% while Scots pine and beech with 43 and 38% MPG demonstrated an increase of the conductivity with 8 and 11%, respectively.

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Section: Introductionmentioning

confidence: 99%

Solid wood impregnated with a bio-based phase change material for low temperature energy storage in building application

Nazari

Jebrane

Terzıev

2022

J Therm Anal Calorim

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“…[12][13][14] Wood impregnated with PCMs can be used in internal and external joineries to enhance the thermal mass of the building, control temperature fluctuations, and improve the thermal comfort in residential buildings. 9 As energy savings become an inevitable part of modern building, synergy between BPCM and wood comprises various options, for example, wood flour, 15,16 wood fibers, 17 and surface treatment of solid wood and wood composites [18][19][20] to host the BPCMs. Wood-BPCM composites working at temperatures of 18 C to 25 C can absorb extra heat and release it when the temperature decreases under a given comfort value to ensure more efficiently use of heat energy.…”

Section: Introductionmentioning

confidence: 99%

Thermal performance and mold discoloration of thermally modified wood containing bio‐based phase change material for heat storage

et al. 2022

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The work presents the results of thermal performance and mold discoloration of thermally modified wood‐based composites incorporating multicomponent fatty acids as a bio‐based phase change materials (BPCM). Thermally modified Scots pine (TMP), beech (TMB), and spruce (TMS) sapwood were impregnated with a multicomponent mixture of linoleic acid and coconut oil fatty acids at a ratio of 20:80. Samples with different BPCM uptakes were analyzed in the temperature range typical for building indoor conditions. Leakage tests were conducted and revealed that the maximum leakage for all the samples is 3% to 5%. T‐history and heat flowmeter methods were used to evaluate the thermal characteristic of the composites. The incorporation of BPCM into thermally modified woods (TMWs) resulted in significant thermal mass improvements, expressed by the ability of the composites to store excessive energy in terms of latent heat and keep the temperature constant for long time. The specific heat capacity of the TMWs was around 2 J/g K, which increased to 4 to 8 J/g K after impregnation with BPCM, depending on the impregnation uptake. Results showed also that TMB has higher thermal conductivity than TMP and TMS, while incorporating of BPCM into these materials resulted in even improved thermal conductivity. Results showed that the thermal conductivity of TMP increased after incorporation of BPCM from 0.06 W/m K to 0.1 and 0.14 W/m K for TMP/BPCM with 48% and 95% uptake respectively. Mold tests showed that BPCM encapsulated in TMWs is less susceptible to mold discoloration compared to untreated wood.

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“…The physics of materials for energy harvesting, conversion and storage must cover nanoscale and thinfilm properties and processes [3][4][5][6][7][8][9][10][11][12][13][14][15][16] as well as their thermal properties [17,18]. It also covers heat and mass transfer enhancements in a system [19][20][21][22][23][24][25][26][27][28][29], renewable and energy efficient materials [30][31][32][33] including large scale as building-integrated photovoltaic (BIPV) panels. In the intermediate scale, we have the solar collectors and storage coupled systems [34,35] to complete the overview.…”

mentioning

confidence: 99%