开发三维数值模型并进行实验验证，以研究高温环境中基于相变的冷却背心的性能

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-10-17 DOI:10.1016/j.ijthermalsci.2024.109487

Kedumese u Mekrisuh , Dushyant Singh , Udayraj

{"title":"开发三维数值模型并进行实验验证，以研究高温环境中基于相变的冷却背心的性能","authors":"Kedumese u Mekrisuh , Dushyant Singh , Udayraj","doi":"10.1016/j.ijthermalsci.2024.109487","DOIUrl":null,"url":null,"abstract":"<div><div>To ensure health and safety of outdoor workers exposed to harsh environment, particularly during summer, they must be protected against heat-related injuries. Personal cooling device like cooling vest are viable solution in such situations considering their cooling capabilities and ergonomic aspects. In the present study, a 3D numerical model is developed for analyzing performance of PCM vest and it is validated with experimental results obtained from a torso thermal manikin facility fabricated in-house. Thermal performance of the PCM vest is analyzed in terms of temperature, liquid fraction and energy storage of PCM and skin temperature for different thermophysical properties of PCM, ambient conditions and mode of operations. Based on the study, PCM with higher latent heat and melting temperature is recommended for the longer working duration of the vest. Increasing ambient temperature from 40 °C to 45 °C reduces the effectiveness time by 20 % while decreasing ambient temperature from 40 °C to 35 °C increases effectiveness time of the PCM vest by 32 %. Fraction of energy stored by the PCM from the body and environment remains unaffected by the change in the latent heat of PCM. Further, it is noticed that increasing the air flow rate or using the PCM vest in hybrid mode of operation is not recommended from the point of view of its effective useable duration. Overall, the study presents a comprehensive approach to estimate performance of the PCM vest realistically and provides guidelines for the design of effective cooling vest for various practical applications.</div></div>","PeriodicalId":341,"journal":{"name":"International Journal of Thermal Sciences","volume":"208 ","pages":"Article 109487"},"PeriodicalIF":4.9000,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Development and experimental validation of a 3D numerical model to investigate performance of phase change based cooling vest in hot environments\",\"authors\":\"Kedumese u Mekrisuh , Dushyant Singh , Udayraj\",\"doi\":\"10.1016/j.ijthermalsci.2024.109487\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>To ensure health and safety of outdoor workers exposed to harsh environment, particularly during summer, they must be protected against heat-related injuries. Personal cooling device like cooling vest are viable solution in such situations considering their cooling capabilities and ergonomic aspects. In the present study, a 3D numerical model is developed for analyzing performance of PCM vest and it is validated with experimental results obtained from a torso thermal manikin facility fabricated in-house. Thermal performance of the PCM vest is analyzed in terms of temperature, liquid fraction and energy storage of PCM and skin temperature for different thermophysical properties of PCM, ambient conditions and mode of operations. Based on the study, PCM with higher latent heat and melting temperature is recommended for the longer working duration of the vest. Increasing ambient temperature from 40 °C to 45 °C reduces the effectiveness time by 20 % while decreasing ambient temperature from 40 °C to 35 °C increases effectiveness time of the PCM vest by 32 %. Fraction of energy stored by the PCM from the body and environment remains unaffected by the change in the latent heat of PCM. Further, it is noticed that increasing the air flow rate or using the PCM vest in hybrid mode of operation is not recommended from the point of view of its effective useable duration. Overall, the study presents a comprehensive approach to estimate performance of the PCM vest realistically and provides guidelines for the design of effective cooling vest for various practical applications.</div></div>\",\"PeriodicalId\":341,\"journal\":{\"name\":\"International Journal of Thermal Sciences\",\"volume\":\"208 \",\"pages\":\"Article 109487\"},\"PeriodicalIF\":4.9000,\"publicationDate\":\"2024-10-17\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"International Journal of Thermal Sciences\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1290072924006094\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, MECHANICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Journal of Thermal Sciences","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1290072924006094","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, MECHANICAL","Score":null,"Total":0}

引用次数: 0

摘要

为了确保暴露在恶劣环境下的户外工作者的健康和安全，尤其是在夏季，必须保护他们免受热伤害。在这种情况下，考虑到冷却能力和人体工程学方面的因素，冷却背心等个人冷却装置是可行的解决方案。本研究开发了一个三维数值模型来分析 PCM 背心的性能，并通过内部制造的躯干热人体模型设施获得的实验结果进行了验证。针对 PCM 的不同热物理性质、环境条件和操作模式，从温度、PCM 的液体分数和储能以及皮肤温度等方面分析了 PCM背心的热性能。根据研究结果，建议采用潜热和熔化温度较高的 PCM，以延长背心的工作时间。环境温度从 40 °C 升至 45 °C 会使 PCM背心的有效时间缩短 20%，而环境温度从 40 °C 降至 35 °C 则会使 PCM背心的有效时间延长 32%。PCM 从人体和环境中储存的能量比例不受 PCM 潜热变化的影响。此外，从有效使用时间的角度来看，不建议提高空气流速或以混合运行模式使用 PCM背心。总之，这项研究提出了一种全面的方法来真实地估算 PCM 冷却背心的性能，并为各种实际应用中有效冷却背心的设计提供了指导。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Development and experimental validation of a 3D numerical model to investigate performance of phase change based cooling vest in hot environments

To ensure health and safety of outdoor workers exposed to harsh environment, particularly during summer, they must be protected against heat-related injuries. Personal cooling device like cooling vest are viable solution in such situations considering their cooling capabilities and ergonomic aspects. In the present study, a 3D numerical model is developed for analyzing performance of PCM vest and it is validated with experimental results obtained from a torso thermal manikin facility fabricated in-house. Thermal performance of the PCM vest is analyzed in terms of temperature, liquid fraction and energy storage of PCM and skin temperature for different thermophysical properties of PCM, ambient conditions and mode of operations. Based on the study, PCM with higher latent heat and melting temperature is recommended for the longer working duration of the vest. Increasing ambient temperature from 40 °C to 45 °C reduces the effectiveness time by 20 % while decreasing ambient temperature from 40 °C to 35 °C increases effectiveness time of the PCM vest by 32 %. Fraction of energy stored by the PCM from the body and environment remains unaffected by the change in the latent heat of PCM. Further, it is noticed that increasing the air flow rate or using the PCM vest in hybrid mode of operation is not recommended from the point of view of its effective useable duration. Overall, the study presents a comprehensive approach to estimate performance of the PCM vest realistically and provides guidelines for the design of effective cooling vest for various practical applications.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

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.