Evaluating different working protocols in freezing chambers through a thermophysiological model

IF 7.1 1区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Building and Environment Pub Date : 2024-11-20 DOI:10.1016/j.buildenv.2024.112331

A.M. Raimundo , A.V.M. Oliveira

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Abstract

Working in freezing chambers involves alternating between very cold and warm environments, posing health and safety risks. Despite this, human thermophysiological responses in such conditions are under-assessed. This study evaluates cold stress in freezing chambers using field measurements and a thermophysiological model. Useful guidelines for improvement of protective clothing and of working periods in both environments are provided.

The field study reveals that workers’ clothing often lacks sufficient insulation, risking whole-body cooling. The thermoregulation model is used to compare the current most often working conditions in freezing chambers with four other scenarios where more appropriate clothing or exposure times are employed. For instance, to maintain current exposure times, basic clothing insulation must increase from 0.24 to 0.35 m² K W^-1 (from ≈ 1.6 to ≈ 2.3 clo). Alternatively, with existing clothing, cold exposure should be limited to 18 minutes and warm exposure must be at least 18 min.

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通过热生理学模型评估冷冻室中的不同工作方案

在冷冻室中工作需要在极冷和极暖的环境中交替进行，因此存在健康和安全风险。尽管如此，人类在这种条件下的热生理反应仍未得到充分评估。本研究利用现场测量和热生理学模型对冷冻室中的冷应激进行了评估。实地研究表明，工人的服装往往缺乏足够的隔热性，有可能导致全身降温。体温调节模型用于比较目前最常见的冷冻室工作条件和其他四种采用更合适的服装或暴露时间的情况。例如，要保持当前的暴露时间，基本的衣物隔热性必须从 0.24 m2 K W-1 增加到 0.35 m2 K W-1（从 ≈ 1.6 clo 增加到 ≈ 2.3 clo）。或者，在现有衣物的情况下，冷暴露时间应限制在 18 分钟，热暴露时间必须至少 18 分钟。

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

Building and Environment 工程技术-工程：环境

CiteScore

12.50

自引率

23.00%

发文量

1130

审稿时长

27 days

期刊介绍： Building and Environment, an international journal, is dedicated to publishing original research papers, comprehensive review articles, editorials, and short communications in the fields of building science, urban physics, and human interaction with the indoor and outdoor built environment. The journal emphasizes innovative technologies and knowledge verified through measurement and analysis. It covers environmental performance across various spatial scales, from cities and communities to buildings and systems, fostering collaborative, multi-disciplinary research with broader significance.