Experimental study on improving effect of cooling garment on thermal comfort and salivary IgA concentration

IF 6.6 2区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Energy and Buildings Pub Date : 2024-10-26 DOI:10.1016/j.enbuild.2024.114970
Huxiang Lin, Haiying Wang, Renjie Yan, Junli Sun, Hang Meng, Songtao Hu
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Abstract

Phase change cooling garments (PCCGs) can effectively alleviate the heat stress of manual workers in high-temperature environments. The PCCGs bring about cold stimuli to users, which not only affect the thermal perception and thermoregulation of the human body, but also could have some influence on the nervous and endocrine system, and even on the immune system. This study explores the effects of PCCGs on thermal comfort and respiratory mucosal immune function. Experiments were conducted in a climate chamber at 33 °C with a relative humidity of 50 %. Twenty participants were recruited and experienced three experimental conditions (NG, normal garments; PCCGs with a cooling temperature of 21 °C, PCCGs-21 and 17 °C, PCCGs-17). Subjects took packing activity with a metabolic rate of around 2.7 met. Subjective questionnaires (thermal sensation votes, thermal comfort votes) were collected, and physiological parameters (skin temperature, core temperature) were tested. Besides, the salivary samples were gathered to measure the Salivary secretory immunoglobulin A (S-IgA) concentrations using enzyme-linked immunosorbent assay (ELISA). The results showed that the use of PCCGs affected the S-IgA concentration significantly. Compared with the NG condition, the S-IgA concentrations increased by 55.9 % and 46.4 % in the PCCGs-21 and PCCGs-17 conditions, respectively. Additionally, the S-IgA concentrations were the highest when participants felt slightly warm or comfortable. The S-IgA concentration of the comfortable state was 98.5 % higher than that of the intolerable state. The S-IgA concentrations were also found to be negatively correlated with local skin temperatures of the back and chest (p < 0.001). The use of PCCGs has a positive influence on improving thermal comfort and S-IgA concentration.
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改善降温衣对热舒适度和唾液 IgA 浓度影响的实验研究
相变冷却服装(PCCGs)可以有效缓解高温环境下体力劳动者的热应激反应。PCCG 给使用者带来冷刺激,不仅影响人体的热感知和体温调节,还可能对神经系统、内分泌系统甚至免疫系统产生一定影响。本研究探讨了 PCCG 对热舒适性和呼吸道粘膜免疫功能的影响。实验在温度为 33 °C、相对湿度为 50 % 的气候箱中进行。共招募了 20 名参与者,他们在三种实验条件下进行了实验(NG,正常服装;PCCGs 制冷温度为 21 °C,PCCGs-21 和 17 °C,PCCGs-17)。受试者以约 2.7 米的新陈代谢率进行打包活动。收集了主观问卷(热感觉票数、热舒适度票数),并测试了生理参数(皮肤温度、核心温度)。此外,还收集了唾液样本,利用酶联免疫吸附试验(ELISA)测量唾液分泌型免疫球蛋白 A(S-IgA)的浓度。结果显示,使用 PCCGs 对 S-IgA 浓度有显著影响。与 NG 条件相比,PCCGs-21 和 PCCGs-17 条件下的 S-IgA 浓度分别增加了 55.9% 和 46.4%。此外,当参与者感到微热或舒适时,S-IgA 浓度最高。舒适状态下的 S-IgA 浓度比难以忍受状态下的 S-IgA 浓度高 98.5%。研究还发现,S-IgA 浓度与背部和胸部的局部皮肤温度呈负相关(p < 0.001)。使用 PCCG 对改善热舒适度和 S-IgA 浓度有积极影响。
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来源期刊
Energy and Buildings
Energy and Buildings 工程技术-工程:土木
CiteScore
12.70
自引率
11.90%
发文量
863
审稿时长
38 days
期刊介绍: An international journal devoted to investigations of energy use and efficiency in buildings Energy and Buildings is an international journal publishing articles with explicit links to energy use in buildings. The aim is to present new research results, and new proven practice aimed at reducing the energy needs of a building and improving indoor environment quality.
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