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Mitigating heat effects in the workplace with a ventilation jacket : simulations of the whole-body and local human thermophysiological response with a sweating thermal manikin in a warm-dry environment
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- Del Ferraro, Simona (author)
- National Institute for Insurance Against Accidents at Work (INAIL)
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- Falcone, Tiziana (author)
- National Institute for Insurance Against Accidents at Work (INAIL)
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- Morabito, Marco (author)
- University of Florence,CNR Institute of BioEconomy (IBE)
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- (creator_code:org_t)
- 2024
- 2024
- English 16 s.
- In: Journal of Thermal Biology. - 0306-4565. ; 119
- Journal article (peer-reviewed)
Abstract
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- Climate change is increasingly affecting human well-being and will inevitably impact on occupational sectors in terms of costs, productivity, workers' health and injuries. Among the cooling garment developed to reduce heat strain, the ventilation jacket could be considered for possible use in workplaces, as it is wearable without limiting the user's mobility and autonomy. In this study, simulations with a sweating manikin are carried out to investigate the effects of a short-sleeved ventilation jacket on human thermophysiological responses in a warm-dry scenario. Simulations were performed in a climatic chamber (air temperature = 30.1 °C; air velocity = 0.29 m/s; relative humidity = 30.0 %), considering two constant levels of metabolic rate M (M 1 = 2.4 MET; M 2 = 3.2 MET), a sequence of these two (Work), and three levels of fan velocities (l f = 0; l f=2; l f=4). The results revealed a more evident impact on the mean skin temperature (T sk) compared to the rectal temperature (T re), with significant decreases (compared to fan-off) at all M levels, for T sk from the beginning and for T re from the 61 st minute. Skin temperatures of the torso zones decreased significantly (compared to fan-off) at all M levels, and a greater drop was registered for the Back. The fans at the highest level (l f=4) were significantly effective in improving whole-body and local thermal sensations when compared to fan-off, at all M levels. At the intermediate level (l f=2), the statistical significance varied with thermal zone, M and time interval considered. The results of the simulations also showed that the Lower Torso needs to be monitored at M 2 level, as the drop in skin temperature could lead to local overcooling and thermal discomfort. Simulations showed the potential effectiveness of the ventilation jacket, but human trials are needed to verify its cooling power in real working conditions.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Produktionsteknik, arbetsvetenskap och ergonomi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Production Engineering, Human Work Science and Ergonomics (hsv//eng)
Keyword
- Cooling garments
- Heat stress
- Occupational heat strain
- Thermophysiological response
- Sweating manikin
- Ventilation jacket
Publication and Content Type
- art (subject category)
- ref (subject category)
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