Determination of radiative properties of polyester batting insulation material from hemispherical transmittance and reflectance measurements

Tilioua, Amine; Libessart, Laurent; Jeandel, G.; Lassue, Stéphane

doi:10.1016/j.applthermaleng.2016.03.050

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…Given the high insulation value of some plastic materials, birds may prefer them over others, and such preferences (if any) may differ between sampling areas (Surgey et al 2012;Suárez-Rodríguez et al 2013). Thus, the thermal insulating capacity of some plastics (such as polyester wadding and foam rubber; Tilioua et al 2016) could be positive for chick survival. However, plastics of high thermal conductivity (e.g., bags) could lead to stronger fluctuations in temperature, reducing survival chances for embryos.…”

Section: Potential Risks Given By the Recorded Plastic Typesmentioning

confidence: 99%

The use of anthropogenic debris as nesting material by the greater thornbird, an inland–wetland-associated bird of South America

Blettler

Gauna

Andréault

et al. 2020

Environ Sci Pollut Res

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Plastic pollution has become a globally pressing environmental issue. In birds, plastic may cause harm by entangling or ingestion when used for nesting. The use of anthropogenic nesting material has so far been mostly studied in birds of terrestrial or marine habitats, but there are yet very few reports for inland water-associated birds. The aim of this study is to better understand the extension and magnitude of the use of anthropogenic debris as nesting material by the greater thornbird (Phacellodomus ruber), a bird species preferably nesting in river floodplain wetlands in South America. We found that P. ruber uses disproportionally large quantities of plastic debris as nesting material (more than 90% of some nest chambers is plastic). This occurred even if ample vegetation (commonly used as soft material) was available. Most of the artificial nesting material was derived from wrapping material released into the environment. We suggest that this species has the potential to indicate vulnerable areas to plastic pollution associated with urban waste mismanagement.

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Section: Potential Risks Given By the Recorded Plastic Typesmentioning

confidence: 99%

The use of anthropogenic debris as nesting material by the greater thornbird, an inland–wetland-associated bird of South America

Blettler

Gauna

Andréault

et al. 2020

Environ Sci Pollut Res

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“…Thermal contact resistance (0.01 (m 2 .K)/W) between two layers of fabrics is also considered in the numerical model. The governing energy equation and boundary conditions to transfer heat from the test plate to the environment through the fabric are given by 19 …”

Section: Numerical Modellingmentioning

confidence: 99%

“…The radiative heat transfer through the fabric assembly is calculated using the radiative thermal conductivity defined as, 19,40 where σ Stefan Boltzmann constant, rnw is the refractive index of the nonwoven sample and β is Rosseland mean extinction coefficient (m −1 ) which is given by 41 where italicħ is the Plank’s constant, c is the speed of light (m/s), and λ is the wavelength (m). Here, as considered in the experiments, the wavelength interval is 8 µ (= λ1)-15 µ (=λ2).…”

Section: Numerical Modellingmentioning

confidence: 99%

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Effect of layering sequence and ambient temperature on thermal insulation of multilayer high bulk nonwoven under extreme cold temperatures

Dupade

Kumari

Premachandran

et al. 2022

Journal of Industrial Textiles

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In extreme cold weather clothing ensemble, multiple layers of high bulk nonwovens are used to provide thermal insulation to the wearer. In this work, the effect of layering sequence in multi-layered high bulk thermal bonded nonwoven assembly on its thermal resistance is evaluated experimentally under sub-zero temperatures. Two multi-layered nonwovens, one made up of 1.4 denier solid (1.4 D S), 6 denier hollow (6 D H) and 15 denier hollow (15 D H) and the second made up of 3 denier hollow (3 D H), 6 denier hollow (6 D H) and 15 denier hollow (15 D H) polyester fibres were studied. The experiments were performed in a climatic chamber in the temperature range of 310 K to 210 K. Numerical simulations were carried out assuming heat transfer through the nonwovens as one-dimensional coupled conduction-radiation. The numerical methodology was developed using theoretical relations available in the literature to estimate the steady-state temperature profiles through the nonwoven layers and were validated using experimental data. The concurrence of experimental and numerical temperature profiles justifies the numerical methodology adopted in this work. Thermal resistance provided by the high bulk nonwoven increases with a decrease in ambient temperature. It is found that the thermal conductivity of nonwoven layers decreases from inner-to outer layers at a given ambient temperature. The heat flux through nonwoven layers, overall thermal conductivity and the thermal resistance of multi-layer nonwoven are independent of layering sequence if the convective heat transfer is extremely low.

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“…Inverse problems in radiative transfer concern many applications including the characterization of complex media (porous or fibrous [1,2], combustion diagnosis [3], medical imaging [4,5] [6,7,8]. In these approaches, inversion is performed by using an iterative procedure, where at each step, direct computations and measurements are compared.…”

Section: Introductionmentioning

confidence: 99%

Symbolic Monte Carlo method applied to the identification of radiative properties of a heterogeneous material

Maanane

Roger

Delmas

et al. 2020

Journal of Quantitative Spectroscopy and Radiative Transfer

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A Symbolic Monte Carlo method (SMC) is applied to the identification of radiative properties of a heterogeneous semitransparent insulating material from measurements of directional-hemispherical transmittance and reflectance at room temperature. The polynomials obtained with SMC allow the development of a complete inverse analysis which determines if the inverse problem solution exists, is unique and stable. Moreover, the numerical efficiency of the absorption and scattering coefficients identification is improved since the radiative transfer equation is only solved once in the overall inverse iterative procedure.

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Determination of radiative properties of polyester batting insulation material from hemispherical transmittance and reflectance measurements

Cited by 9 publications

References 24 publications

The use of anthropogenic debris as nesting material by the greater thornbird, an inland–wetland-associated bird of South America

The use of anthropogenic debris as nesting material by the greater thornbird, an inland–wetland-associated bird of South America

Effect of layering sequence and ambient temperature on thermal insulation of multilayer high bulk nonwoven under extreme cold temperatures

Symbolic Monte Carlo method applied to the identification of radiative properties of a heterogeneous material

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