Thermal Comfort and Sensitivity of Different Body Parts Exposed to Local Infrared Radiation

IF 4.3 2区 环境科学与生态学 Q1 CONSTRUCTION & BUILDING TECHNOLOGY
Indoor air Pub Date : 2025-09-02 DOI:10.1155/ina/5526614
Guodan Liu, Yao Zhang, Peiqi Zhang, Huiyang Zhong, Yihang Ji, Haonan Ma, Mingli Lu, Xiaojie Zhou, Songtao Hu
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Abstract

Infrared radiation equipment, as a typical personal comfort system (PCS) unit, could effectively improve human thermal sensation vote (TSV) in cold environments. It could also be positioned diversely and controlled independently to meet personalized thermal requirements. However, the heat transfer principle of infrared radiation differs from thermal convection and conduction. Most parts of the human body were covered by clothes in winter; thus, the thermal responses differed from those uncovered. As a result, studies on the thermal responses and thermal sensitivity of different parts with clothing to local radiation were limited. An experiment was conducted at the indoor air temperature of 18°C in winter, during which five body parts were stimulated by infrared radiation at the intensity of 4 and 20 W/m2. Subsequently, the indoor environment and physiological parameters were measured. Meanwhile, the local and overall thermal responses of the human body were collected with questionnaires. Furthermore, the calculation method based on thigh sweating rate was determined as an approach to assess the sensitivity of each body part to infrared radiation more precisely. In terms of this method, the chest was more sensitive to infrared radiation than limbs, and the intensity of the infrared radiation had greater impacts on chest sensitivity while fewer effects on limbs. These findings could help improve the reliability in predicting and evaluating human thermal responses to infrared radiation environments and also provided references for the applications of infrared radiation PCS devices.

Abstract Image

暴露于局部红外辐射下不同身体部位的热舒适和敏感性
红外辐射设备作为典型的个人舒适系统(PCS)单元,可以有效改善寒冷环境下人体的热感觉投票(TSV)。它也可以不同的定位和独立控制,以满足个性化的热需求。然而,红外辐射的传热原理不同于热对流和导热。冬天,人体的大部分都被衣服覆盖着;因此,热响应与未发现的不同。因此,对穿着服装的不同部位对局部辐射的热响应和热敏性的研究受到限制。实验在冬季室内空气温度为18℃的条件下,对人体5个部位进行4、20 W/m2强度的红外辐射刺激。随后,测量室内环境和生理参数。同时,采用问卷调查的方式收集人体的局部和整体热反应。进一步确定了基于大腿排汗率的计算方法,作为更准确评估人体各部位对红外辐射敏感性的方法。在该方法中,胸部对红外辐射的敏感性高于四肢,且红外辐射强度对胸部敏感性的影响较大,而对四肢的影响较小。这些发现有助于提高人体对红外辐射环境热反应预测和评价的可靠性,也为红外辐射PCS设备的应用提供了参考。
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来源期刊
Indoor air
Indoor air 环境科学-工程:环境
CiteScore
10.80
自引率
10.30%
发文量
175
审稿时长
3 months
期刊介绍: The quality of the environment within buildings is a topic of major importance for public health. Indoor Air provides a location for reporting original research results in the broad area defined by the indoor environment of non-industrial buildings. An international journal with multidisciplinary content, Indoor Air publishes papers reflecting the broad categories of interest in this field: health effects; thermal comfort; monitoring and modelling; source characterization; ventilation and other environmental control techniques. The research results present the basic information to allow designers, building owners, and operators to provide a healthy and comfortable environment for building occupants, as well as giving medical practitioners information on how to deal with illnesses related to the indoor environment.
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