An investigation in structural parameters of needle-punched nonwoven fabrics on their thermal insulation property

Raeisian, L.; Mansoori, Z.; Hosseini-Abardeh, R.; Bagherzadeh, Roohollah

doi:10.1007/s12221-013-1748-1

Cited by 23 publications

(17 citation statements)

References 16 publications

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“…Thermal resistance expresses the ability of material to prevent heat flow through the thickness over unit surface area [20][21][22]. Fabric thickness and thermal conductivity are important factors governing thermal insulation of textiles.…”

Section: Thermal Resistancementioning

confidence: 99%

“…The higher the thermal resistance, the lower is the heat loss. The thermal resistance, R, is connected with the thermal conductivity, , and the fabric thickness, h, as follows [22].…”

Section: Thermal Resistancementioning

confidence: 99%

“…It is believed that the thickness is one of the major factors influencing the thermal properties of fibrous materials [22].…”

Section: Thermal Resistancementioning

confidence: 99%

See 2 more Smart Citations

Thermodynamics of aerogel-treated nonwoven fabrics at subzero temperatures

Venkataraman

Mishra

Jašíková

et al. 2014

Journal of Industrial Textiles

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Nonwoven fabrics and aerogel have complementary properties required for good thermal insulation. In this work, the polyester/polyethylene nonwoven thermal wraps treated with amorphous silica aerogel are studied and characterized with regard to thermodynamical properties at subzero temperatures. The characterization of physical structure was done by scanning electron microscope. C-Therm TCi thermal conductivity analyzer was used to measure thermal properties like conductivity, resistance, and effusivity at subzero temperatures. Heat transfer caused by convection through the thermal wraps was measured by particle image velocimetry technique, which allows obtaining information about the current distribution of velocities in two-dimensional array in a flowing fluid. Vector and scalar maps of the fluid flow were caused by thermal convection. The samples were studied for different temperature gradients. On scientific evaluation of results, thermal conductivity and thermal effusivity were found to be differing with respect to different temperatures and fabric density. Thermal resistance showed an increase as the fabric thickness increases. It was observed that fabric density and the aerogel present in the structures have a significant effect on thermal properties of aerogel-treated nonwoven fabrics. The findings in this study are significant and can be used for further research in aerogel-treated nonwoven fabrics.

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Section: Thermal Resistancementioning

confidence: 99%

“…The higher the thermal resistance, the lower is the heat loss. The thermal resistance, R, is connected with the thermal conductivity, , and the fabric thickness, h, as follows [22].…”

Section: Thermal Resistancementioning

confidence: 99%

See 1 more Smart Citation

Thermodynamics of aerogel-treated nonwoven fabrics at subzero temperatures

Venkataraman

Mishra

Jašíková

et al. 2014

Journal of Industrial Textiles

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“…The exchange of heat follows a distinct phenomena of simultaneous conduction, convection, and radiation. Heat transfer through conduction and radiation has been well understood and documented [1][2][3][4][5][6]. However, convective heat transfer through the fabric is difficult to model as there are no exact solutions for porous material under heat convection as well as the limited research work in this area [7,8].…”

Section: Introductionmentioning

confidence: 99%

3D Numerical Simulation of Laminar Flow and Conjugate Heat Transfer through Fabric

Zhu

Dana

Wang

et al. 2017

Autex Research Journal

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The air flow and conjugate heat transfer through the fabric was investigated numerically. The objective of this paper is to study the thermal insulation of fabrics under heat convection or the heat loss of human body under different conditions (fabric structure and contact conditions between the human skin and the fabric). The numerical simulations were performed in laminar flow regime at constant skin temperature (310 K) and constant air flow temperature (273 K) at a speed of 5 m/s. Some important parameters such as heat flux through the fabrics, heat transfer coefficient, and Nusselt number were evaluated. The results showed that the heat loss from human body (the heat transfer coefficient) was smallest or the thermal insulation of fabric was highest when the fabric had no pores and no contact with the human skin, the heat loss from human body (the heat transfer coefficient) was highest when the fabric had pores and the air flow penetrated through the fabric.

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“…The effects of structural parameters of fabrics, including fiber diameter, bulk density, thickness, cover factor, porosity, weave structure, weave density and yarn fineness, on their thermal resistance properties were investigated. [3][4][5][6][7][8][9][10] Raeisian et al 3 have reported that the thermal resistance properties of needle-punched nonwoven fabrics can be affected by different processing and fiber diameters, the bulk density of the layer and the thickness and surface pressure on layers of hollow fibers. Zhang et al 4 analyzed the effects of different materials and different structural parameters on the dynamic thermal conductivity performance of fabrics by using a self-developed dynamic heat transfer testing device.…”

mentioning

confidence: 99%

Simulation of the effects of structural parameters of glass fiber fabric on the thermal insulation property

Zheng

Wang

Zhao

et al. 2017

Textile Research Journal

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The impact of different structural parameters on the thermal insulation of glass fiber fabrics, by using numerical simulation, was investigated. The structural parameters investigated were the weave structure, warp density and yarn fineness. A series of structure models were calculated under the same boundary and initial conditions, which combine thermal radiation, conduction and convection. The simulation results have been validated by experiments. The experimental results and the predictions from numerical simulations were in good agreement. The results show that thermal insulation for the samples is in the order plain < 2/1 twill < 2/2 twill < 2/3 twill < 3/3 twill fabric, when using constant structure density and yarn fineness. Increasing the warp density, from 110 to 160 ends/10 cm, leads to a significant decrease in heat transfer performance. When the warp density increases to more than 160 ends/10 cm, the thermal insulation property shows a decreasing trend with an increase in warp density. Furthermore, thermal insulation performance of the samples dramatically increases as yarn fineness goes from 129 to 280 tex, and then decreases for yarn fineness greater than 280 tex. This study will provide the theoretical basis for the thermal design and application of fibrous materials.

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An investigation in structural parameters of needle-punched nonwoven fabrics on their thermal insulation property

Cited by 23 publications

References 16 publications

Thermodynamics of aerogel-treated nonwoven fabrics at subzero temperatures

Thermodynamics of aerogel-treated nonwoven fabrics at subzero temperatures

3D Numerical Simulation of Laminar Flow and Conjugate Heat Transfer through Fabric

Simulation of the effects of structural parameters of glass fiber fabric on the thermal insulation property

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