Study of heat and moisture transfer within multi-layer clothing assemblies consisting of different types of battings

Wu, Huijun; Fan, Jintu

doi:10.1016/j.ijthermalsci.2007.04.008

Cited by 58 publications

(46 citation statements)

References 29 publications

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“…Before the preparation of a clothing prototype, its characteristics and properties can be studied in order to maximise its thermal performance and minimise moisture accumulation within its layers (that may be associated, for instance, to chilling discomfort in sportswear [18], or changes in thermal performance of firefighter's protective garments [36]). This study aims to clarify how clothing materials affect the temperature and water content of the clothing surface in contact with the skin.…”

Section: Influence Of Several Parameters/characteristic Of Multilayermentioning

confidence: 99%

“…As in experimental procedures, the skin boundary conditions of heat and of mass are often set constant in numerical studies of heat and mass transfer through clothing [15][16][17][18][19][20][21][22][23][24]. Neves et al [15] studied the thermal performance of multilayer clothing assuming constant temperature and sweat rate on the skin, whereas Wu and Fan [18] defined the mass boundary condition as the concentration of water saturation, when studying a multilayer assembly exposed to a cold ambient.…”

Section: Introductionmentioning

confidence: 99%

“…Neves et al [15] studied the thermal performance of multilayer clothing assuming constant temperature and sweat rate on the skin, whereas Wu and Fan [18] defined the mass boundary condition as the concentration of water saturation, when studying a multilayer assembly exposed to a cold ambient. The aforementioned boundary conditions are also used in other field of application like artificial microclimates to study the interaction between the building ventilation and personalised airflow systems, with the thermal plume around human body [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Effects of clothing and fibres properties on the heat and mass transport, for different body heat/sweat releases

Neves

Campos

Mayor

2017

Applied Thermal Engineering

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Section: Influence Of Several Parameters/characteristic Of Multilayermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of clothing and fibres properties on the heat and mass transport, for different body heat/sweat releases

Neves

Campos

Mayor

2017

Applied Thermal Engineering

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“…Several works in literature report studies on the heat and mass transport in textile structures [1][2][3][4][5][6][7][8][9]. Le et al [1] and Gibson and Charmchi [9] used volume-averaging techniques to address the interaction between heat and mass transfer, and track concentration and temperature fronts as moisture is transported through hygroscopic materials.…”

Section: Introductionmentioning

confidence: 99%

“…Barker et al [3] used a similar approach to analyse the role of moisture transport in the protection offered by firefighter garments exposed to high intensity thermal radiation. Fan and co-workers [5][6][7] transfer across several textile assemblies. They considered different assumptions regarding the mechanisms for water transport, in order to analyse the effect of textile properties and of layers relative position, on the heat and mass transferred across clothing.…”

Section: Introductionmentioning

confidence: 99%

On the determination of parameters required for numerical studies of heat and mass transfer through textiles – Methodologies and experimental procedures

Neves

Campos

Mayor

2015

International Journal of Heat and Mass Transfer

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a b s t r a c tThe aim of this study was to develop methodologies and experimental procedures to determine textile parameters required in numerical approaches of heat and mass transfer through textiles. Privileging techniques usually available in textile/clothing laboratories, experimental approaches were defined that allow to estimate all required parameters, while taking into consideration water presence in the fibres and hence the effect of fibres hygroscopic properties. Numerical models usually require values of textile thickness, fibre fraction, and tortuosity, as well as knowledge of the boundary conditions, e.g. convective heat and mass transfer coefficients. To calculate these parameters, thickness, weight, and volume of textile samples were measured, whereas convective and textile evaporative resistances were determined by indirect measurements. Results were obtained for four distinct textile samples (made of wool, cotton, and a mixture of materials), of different hydrophilic nature. When the obtained parameters were incorporated in a numerical model and numerical predictions of temperature and humidity were compared with experimental data obtained during measurements of fabric evaporative resistance, it was shown that the predictions were accurate; this lends support to the developed methods and approaches.Since an uncertainty in the measured parameters can compromise the accuracy of numerical predictions, a sensitivity analysis was conducted to study the influence of deviations in the model input parameters and of assumptions regarding water presence in the fibres, on the predictions of heat and mass transfer rates. The results show that a deviation in textile weight and thickness as well as the assumption of no water retained in fibres during their characterisation, have a significant effect on the predicted heat transfer and water distribution over time. Moreover, a deviation in the total evaporative resistance, convective evaporative resistance, and sorption rate factor has great influence on the heat flux obtained in the initial period of testing.

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Fabrication and characterization of a novel polypropylene/poly(vinyl alcohol)/aluminum hybrid layered assembly for high‐performance fibrous insulation

Fan

Qin

et al. 2008

J of Applied Polymer Sci

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A novel hybrid layered assembly based on aluminum-coated poly(vinyl alcohol) (PVA) nanofibers supported on a polypropylene (PP) web was fabricated via electrospinning and physical vapor deposition. The PVA nanofibers and coated aluminum were characterized by field emission scanning electron microscopy and transmission electron microscopy. The results indicate that PVA nanofibers approximately 430 nm in diameter and an aluminum coating approximately 37 nm in thickness were successfully embedded on the supporting PP web. Fourier transform infrared spectra and the water vapor transmission rate were used to determine the IR spectral transmission and water vapor transmission through the materials with or without the nanofiber or metal coating, respectively. Compared to the uncoated PP web, the novel hybrid layered assembly showed a significant increase in thermal radiation extinction due to both the radiation reflection of the metal coating and the radiation absorption of the nanofibers without noticeable weight gain or water vapor permeable deterioration. This method represents a simple and practical approach for the production of a lightweight hybrid layered assembly that is highly beneficial in the efficient reduction of heat loss in low-density fibrous insulations without a noticeable deterioration in the water vapor permeability and that could be used for wide applications such as protective clothing, sleeping bags, building construction, and aircraft.

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Study of heat and moisture transfer within multi-layer clothing assemblies consisting of different types of battings

Cited by 58 publications

References 29 publications

Effects of clothing and fibres properties on the heat and mass transport, for different body heat/sweat releases

Effects of clothing and fibres properties on the heat and mass transport, for different body heat/sweat releases

On the determination of parameters required for numerical studies of heat and mass transfer through textiles – Methodologies and experimental procedures

Fabrication and characterization of a novel polypropylene/poly(vinyl alcohol)/aluminum hybrid layered assembly for high‐performance fibrous insulation

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