Purpose

To have a better understanding of the heat transfer mechanisms in a sleeping bag and to investigate the factors influencing thermal resistance of a down sleeping bag.

Design/methodology/approach

The mechanism of heat transfer in a sleeping bag was discussed in this paper. The thermal resistances of 24 samples were investigated. Besides, the relation between fill weight and thermal resistance, and that between the air permeability of fabric and thermal resistance, as well as that between down filling rate and thermal resistance were analyzed.

Findings

The results showed that thermal resistances of samples varied from 0.35 to 0.8 m² K/W. The fill weight was the most important factor of thermal resistance of sleeping bag and the relation between fill weight and thermal resistance matched well with cubic function. A multiple regression formula was proposed, which with thermal resistance as a dependent variable and with air permeability of fabric, down filling rate, fill weight as independent variables.

Originality/value

Thermal properties of a sleeping bag were analyzed through simplified basic unit under simplified environment conditions, which was necessary for building the first stage of systematic study of thermal performance of a sleeping bag.

中文翻译：

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影响羽绒睡袋热阻的因素

目的

更好地了解睡袋的传热机理，研究影响羽绒睡袋热阻的因素。

设计/方法/方法

本文讨论了睡袋中的热传递机制。研究了 24 个样品的热阻。此外，还分析了填充重量与热阻之间的关系，织物透气性与热阻之间的关系，以及羽绒填充率与热阻之间的关系。

发现

结果表明，样品的热阻在 0.35 到 0.8 m ² K/W 之间变化。填充重量是影响睡袋热阻的最重要因素，填充重量与热阻的关系与三次函数匹配良好。提出了以热阻为因变量，以织物透气性、羽绒填充率、填充重量为自变量的多元回归公式。

原创性/价值

在简化的环境条件下，通过简化的基本单元对睡袋的热性能进行分析，这对于建立睡袋热性能系统研究的第一阶段是必要的。