Quasi steady state and dynamic hygrothermal performance of fibrous Hemp and Stone Wool insulations: Two innovative laboratory based investigations
| Autor: | Darryl J. Newport, Mihaela Anca Ciupala, Simon Tucker, Eshrar Latif, Marian Pruteanu, Devapriya Chitral Wijeyesekera |
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| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Materials science Absorption of water 020209 energy Geography Planning and Development 0211 other engineering and technologies 02 engineering and technology Thermal conductivity Thermal insulation 021105 building & construction 0202 electrical engineering electronic engineering information engineering Forensic engineering Relative humidity Composite material Physics::Atmospheric and Oceanic Physics Civil and Structural Engineering Condensed Matter::Quantum Gases Moisture business.industry Condensation Building and Construction Equilibrium moisture content Interstitial condensation TH NA Condensed Matter::Strongly Correlated Electrons business |
| Zdroj: | Latif, E, Tucker, S, Ciupala, M A, Ciupala, M A, Newport, D J & Pruteanu, M 2016, ' Quasi steady state and dynamic hygrothermal performance of fibrous hemp and stone wool insulations : two innovative laboratory based investigations ', Building and Environment, vol. 95, pp. 391-404 . https://doi.org/10.1016/j.buildenv.2015.10.006 |
| ISSN: | 0360-1323 |
| DOI: | 10.1016/j.buildenv.2015.10.006 |
| Popis: | Moisture and heat management properties of Hemp and Stone Wool insulations were studied by mounting them between a hot and a cold climate chamber. Both insulations were exposed to identical hygrothermal boundary conditions. Quasi steady state and dynamic tests were carried out at a range of relative humidity exposures. The likelihood of interstitial condensation was assessed and equivalent thermal conductivity values of the insulations were determined. The adsorption-desorption isotherms of the insulations were also determined in a dynamic vapour sorption (DVS) instrument. It was observed that the likelihood of condensation was higher in Stone Wool insulation than in Hemp insulation. Hemp insulation performed better in managing moisture due to its high hygric inertia and water absorption capacity. It was observed that the equivalent thermal conductivity of Stone Wool insulation was dependent on enthalpy flow and phase change of moisture. The equivalent thermal conductivity of Hemp insulation was close to its declared thermal conductivity in dynamic conditions when high relative humidity exposures were transient. In quasi steady state boundary conditions, when the insulation was allowed to reach the equilibrium moisture content at ranges of relative humidity, there was a moisture dependent increase of thermal conductivity in Hemp insulation. |
| Databáze: | OpenAIRE |
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