Performance of two-layer filters for innovative respiratory protective devices containing granular phase change materials

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-06-05 DOI:10.1016/j.ijthermalsci.2025.110029

Nickolay A. Lutsenko , Alina S. Kim , Sergey S. Fetsov

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引用次数: 0

Abstract

In this paper, we propose to combine a gas-and-smoke protection element, which consists of granular adsorbing materials, with a thermal protection element consisting of a granular phase change material (PCM) to create multipurpose respiratory protective systems. Such devices can protect the human respiratory system not only from dangerous toxic gaseous substances that cause poisoning, but also from thermal injuries at indoor fires, reducing the temperature of the inhaled air to a safe value for a specified time. Using an original numerical model, we have investigated the effect of various parameters on the efficiency of both two-layer combined filters consisting of a layer of granular PCM and a layer of adsorbing material, and two-layer thermal protection filters consisting of layers of granular PCMs with different properties. It has been shown that commercially available granular PCMs make it possible to create two-layer combined filters with acceptable mass. In particular, a two-layer filter, which is half-filled with PCM and half-filled with activated carbon, should have a mass of only about 190 g in order to cool the inhaled air from 177 °C to less than 50 °C within 10 min. It has been shown that the optimal arrangement of the PCM layer and the gas-and-smoke protection element in the filter, which leads to the longest operating time of the respirator, depends on both the value of the maximum allowable temperature of the inhaled gas and the required operating time of the respiratory protective device, which is determined by the mass of the granular materials.

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含颗粒相变材料的创新呼吸防护装置双层过滤器的性能

在本文中，我们建议将由颗粒状吸附材料组成的气体和烟雾保护元件与由颗粒状相变材料（PCM）组成的热保护元件相结合，以创建多用途呼吸保护系统。这种装置不仅可以保护人体呼吸系统免受引起中毒的危险有毒气体物质的伤害，还可以防止室内火灾时的热损伤，将吸入空气的温度降低到规定时间的安全值。利用原始的数值模型，研究了不同参数对两种过滤器效率的影响，一种是由一层颗粒PCM和一层吸附材料组成的两层组合过滤器，另一种是由不同性质的颗粒PCM组成的两层热保护过滤器。它已经表明，商业上可用的粒状PCMs使创建具有可接受质量的两层组合滤波器成为可能。特别是半填充PCM，半填充活性炭的双层过滤器，其质量应仅为190 g左右，才能在10分钟内将吸入的空气从177℃冷却到50℃以下。已有研究表明，PCM层和过滤器中烟雾保护元件的最佳布置，使呼吸器的工作时间最长。取决于吸入气体的最高允许温度的值和呼吸防护装置所需的操作时间，这是由颗粒材料的质量决定的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.