Thermal conductivity, resistance and specific heat capacity of chemically-treated, widely-used timber for building-envelope

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dc.contributor.authorAntwi-Boasiako, C.
dc.contributor.authorBoadu, Boakye K.
dc.date.accessioned2018-06-04T17:16:49Z
dc.date.accessioned2023-04-19T00:38:50Z
dc.date.available2018-06-04T17:16:49Z
dc.date.available2023-04-19T00:38:50Z
dc.date.issued2018
dc.descriptionArticle published in the High Temperatures-High Pressures,2018en_US
dc.description.abstractWood has low thermal conductivity with high thermal resistance and specific heat capacity (SHC). Timber-designed building-envelopes have much resistance to solar radiation, which discomforts occupants. How chemicals alter thermal properties of preservative-treated non-durable woods for housing is inadequately studied. Two preservative-chemicals (Erythropleum suaveolens bark extract and inorganic Maneb/Lambda) influence on the SHC (determined by “method of mixtures”) and, thermal conductivity and resistance (using Lee’s Disc Apparatus) of Ceiba pentandra (a non-durable building timber) was investigated. Stakes treated with E. suaveolens and Maneb/Lambda recorded greater conductivity [(0.005 ±  0.001) × 10-³ and (0.006 ± 0.0006) × 10-³ W/m.K respectively] than C. pentandra control [(0.004 ± 0.0008) × 10-³ W/m.K]. Conductivity was greater in longitudinal surface than radial and tangential directions for all stakes. Thermal resistance of stakes rated as: control [(0.12 ± 0.0008) × 102 – (1.02 ± 0.02) × 102 m2K/W] > E. suaveolens [(0.1 ± 0.002) × 102 – (0.76 ± 0.02) × 102 m2K/W] > Maneb/Lambda [(0.1 ± 0.002) × 102 – (0.73 ± 0.02) × 102 m2K/W]. Maneb/Lambda-treated stakes obtained the greatest SHC [(6810.9 ±  12) × 106 ], then E. suaveolens-treated samples [(5242.1 ± 269.9) × 106 ] and untreated/control [(4014.2 ± 47.8) × 106 ]. Compared to other building materials (e.g., steel, aluminium and concrete), treated stakes have low thermal conductivity, with high thermal resistance and SHC, which is desired as an insulation material. Thus, while chemically-treated timber durability is improved, its insulating capacity to provide thermal comfort in buildings is assured.en_US
dc.description.sponsorshipKNUSTen_US
dc.identifier.citationHigh Temperatures-High Pressures, Vol. 47(1), pp. 65–84en_US
dc.identifier.urihttps://ir.knust.edu.gh/handle/123456789/11272
dc.language.isoenen_US
dc.publisherHigh Temperatures-High Pressuresen_US
dc.subjectHeat transmissionen_US
dc.subjectorganic preservativeen_US
dc.subjectspecific heat capacityen_US
dc.subjectsteady-stateen_US
dc.subjectthermal insulationen_US
dc.subjectwood anisotropy.en_US
dc.titleThermal conductivity, resistance and specific heat capacity of chemically-treated, widely-used timber for building-envelopeen_US
dc.typeArticleen_US
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