Study on the thermal comfort index of solar radiation conditions in winter

Yang, Ruiqiao; Zhang, Huan; You, Shijun; Zheng, Wandong; Zheng, Xuejing; Ye, Tianzhen

doi:10.1016/j.buildenv.2019.106456

Cited by 47 publications

(14 citation statements)

References 31 publications

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“…Linear regression analyses with prediction intervals were used to examine if solar radiation levels can predict the physiological strain (HR, T core , and T sk ) and labor intensity. Thereafter, solar radiation was categorized into three groups (indoor (0 to 160 W/m 2 ), mixed (161 to 320 W/m 2 ), and outdoor (>320 W/m 2 ) environments) based on previous studies [ 41 , 42 ] reporting that 93–97% of the indoor environments are characterized by solar radiation levels ranging between 0 and 160 W/m 2 . We used solar radiation ranging between 161 and 320 W/m 2 (twice the indoor environment) to define mixed environments (workers spending time both indoor and outdoor).…”

Section: Appendix A1 Experimental Protocolmentioning

confidence: 99%

The Impacts of Sun Exposure on Worker Physiology and Cognition: Multi-Country Evidence and Interventions

Ioannou

Tsoutsoubi

Mantzios

et al. 2021

IJERPH

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Background: A set of four case-control (n = 109), randomized-controlled (n = 7), cross-sectional (n = 78), and intervention (n = 47) studies was conducted across three countries to investigate the effects of sun exposure on worker physiology and cognition. Methods: Physiological, subjective, and cognitive performance data were collected from people working in ambient conditions characterized by the same thermal stress but different solar radiation levels. Results: People working under the sun were more likely to experience dizziness, weakness, and other symptoms of heat strain. These clinical impacts of sun exposure were not accompanied by changes in core body temperature but, instead, were linked with changes in skin temperature. Other physiological responses (heart rate, skin blood flow, and sweat rate) were also increased during sun exposure, while attention and vigilance were reduced by 45% and 67%, respectively, compared to exposure to a similar thermal stress without sunlight. Light-colored clothes reduced workers’ skin temperature by 12%–13% compared to darker-colored clothes. Conclusions: Working under the sun worsens the physiological heat strain experienced and compromises cognitive function, even when the level of heat stress is thought to be the same as being in the shade. Wearing light-colored clothes can limit the physiological heat strain experienced by the body.

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Section: Appendix A1 Experimental Protocolmentioning

confidence: 99%

The Impacts of Sun Exposure on Worker Physiology and Cognition: Multi-Country Evidence and Interventions

Ioannou

Tsoutsoubi

Mantzios

et al. 2021

IJERPH

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“…In addition, it was a major cause of local discomfort owing to the allowable value of radiation asymmetry. Yang et al [27] proposed a corrected PMV (CPMV) to evaluate the impact of solar radiation. Solar radiation and thermal comfort were evaluated in a building with a glass structure.…”

Section: Radiant Temperaturementioning

confidence: 99%

Influencing factors on thermal comfort and biosignals of occupant-a review

2021

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Thermal comfort has become one of the most important factors to be considered for the working efficiency and health of occupants in an indoor space. In addition, it is considered in the design of heating, ventilation, and air-conditioning systems for the management of building energy. In this study, the key factors influencing thermal comfort are briefly discussed, such as air temperature, air velocity, radiant temperature, relative humidity, insulation of clothes, and metabolic rate. These factors act in a complex manner, affecting people and causing physical and psychological changes. Also, human physical changes have a significant impact on the human body, including skin temperature, heart rate variability, and electroencephalogram measurements, and are modified by the surrounding thermal environment. In this article, the factors influencing thermal comfort and biosignals of humans are discussed, and recent related studies are introduced.

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“…Yang et al [7] have studied the thermal comfort during winter at the city of Tianjin, N. China. Adegoke and Dombo [8] examined the human thermal comfort in Akure, Nigeria.…”

Section: Introductionmentioning

confidence: 99%

Climate Change and Thermal Comfort in Greece

Kambezidis

Psiloglou

Varotsos

et al. 2021

Climate

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Global warming is an environmental issue keeping all nations alert. Under this consideration, the present work investigates the future thermal sensation of the Greek population. Three periods are selected (2021–2050, 2046–2075, 2071–2100) and two Intergovernmental Panel for Climate Change (IPCC) representative concentration pathway (RCP) 4.5 and 8.5 scenarios. Use of Thom’s discomfort index (TDI) is made, which is calculated from air temperature and relative humidity included in typical meteorological years (TMYs) derived for 1985–2014 and future periods (both IPCC scenarios) for 33 locations in Greece. TDI is discriminated into 6 classes. The analysis shows that there is no significant shift from past to future annual mean TDIs in terms of its classification. The same is found for the summer TDI values. Nevertheless, a distribution of the various TDI classes is provided within the TMYs. Maps of annual TDI values are prepared for Greece by using the kriging method; higher values are found in the southern part of Greece and lower values in the northern. Best-fit regression equations derived show the intra-annual TDI variation in all periods. Also, scatter plots of annual TDIs in the future epochs in comparison with the historical period show a linear relationship.

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Study on the thermal comfort index of solar radiation conditions in winter

Cited by 47 publications

References 31 publications

The Impacts of Sun Exposure on Worker Physiology and Cognition: Multi-Country Evidence and Interventions

The Impacts of Sun Exposure on Worker Physiology and Cognition: Multi-Country Evidence and Interventions

Influencing factors on thermal comfort and biosignals of occupant-a review

Climate Change and Thermal Comfort in Greece

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