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首页> 外文期刊>The Journal of the Textile Institute >Study on heat transmission through multilayer clothing assemblies under different convective modes
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Study on heat transmission through multilayer clothing assemblies under different convective modes

机译：不同对流方式下多层服装组件传热的研究

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摘要

The present work reports a detailed study on dry thermal resistance of multilayered clothing assemblies under different modes of heat transmission (i.e. non-convective mode, natural convection and forced convection). A series of multilayered fabric assemblies have been created with different combinations of fabric layers (like plain woven, nonwoven wadding, warp-knitted spacer fabric, weft-knitted breathable coated and weft-knitted aluminium coated) and air gaps of different thicknesses between fabric layers. Significant impacts of thickness of air gaps and mode of heat transmission on thermal resistance of multilayered clothing assemblies have been observed. The thermal resistance of the fabric assemblies increases with the increase in the thickness of air gap in between fabric layers. The thermal resistance of all the fabric assemblies at any given air layer thickness is highest under non-convective mode of heat transmission, followed by natural convection mode and the forced convection mode shows least thermal resistance. Incorporation of coated fabric in the outer layer reduces the effect of forced convection. ANOVA has been prepared and F value has been calculated to find the effect of modes of convection, type of fabric and thickness of air layer on thermal transmission properties. The results obtained from this detailed study will help in designing multilayered clothing assemblies suitable for different climatic conditions.
机译：本工作报告了在不同传热模式（即非对流模式，自然对流和强制对流）下多层衣物组件的干热阻的详细研究。已经创建了一系列的多层织物组件，这些织物组件具有不同的织物层组合（例如平织，无纺棉，经编间隔织物，纬编透气涂层和纬编铝涂层）以及织物层之间不同厚度的气隙。观察到气隙厚度和传热方式对多层衣物组件的热阻产生了重大影响。织物组件的热阻随着织物层之间的气隙厚度的增加而增加。在非对流传热模式下，在任何给定的空气层厚度下，所有织物组件的热阻最高，其次是自然对流模式，而强制对流模式则显示出最小的热阻。在外层中加入涂层织物可减少强制对流的影响。制备了方差分析并计算了F值，以发现对流方式，织物类型和空气层厚度对传热性能的影响。这项详细研究获得的结果将有助于设计适合不同气候条件的多层衣物组件。

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