Effect of environmental parameters on heat transfer characteristics and thermal sensation of human body with step change of temperature

Qi, Liangkui; Wu, Qingqing; Zhang, Liang; Liu, Jianhua

doi:10.1007/s00231-021-03151-5

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…When the ambient temperature was the same at 0 • C, the vote results for S12 were higher than those of S8 and S4. Due to the impression of a lower-temperature environment, an "overshooting phenomenon" appeared in S12 under the high activity condition, which was also observed by Qi et al [16] and Chen et al [26].…”

Section: Skin Temperaturesupporting

confidence: 64%

“…Mihara et al [15] the time taken for thermal responses to reach steady state by least squares approximation. Focusing on conditions of higher ambient temperature, Qi et al [16] carried out an artificial climate chamber experiment to simulate step change under different temperatures (26 • C~28/30/32 • C~26 • C), wind speed and clothing thermal resistance, and found an "overshooting phenomenon" of thermal sensation during step change. These study conclusions showed that among thermal environment parameters, the ambient temperature is the most important factor.…”

Section: Introduction 1backgroundmentioning

confidence: 99%

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Experimental Study on the Effect of Temperature Up-Step on Human Thermal Perception and Skin Temperature between Activity Intensities at Low Ambient Temperatures

2022

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In the north of China, during winter, a large number of activities (such as leisure, work, sightseeing and sports) are engaged in. This paper mainly focuses on human thermal perceptions of outdoor activities in a winter climate, especially the change in thermal perceptions when humans enter a temporary rest space with a shelter effect. A climate chamber was applied in our experiments, and temperature up-steps of 4, 8 and 12 °C were set, respectively. Twenty four college students were invited to engage in activities of different intensities, such as standing, walking (slowly) and biking. Through questionnaire survey and field measurement, the subjects’ thermal sensation, thermal comfort and skin temperature were obtained. Hypothesis testing and non-linear regression methods were introduced to analyze experiment data. Major results were as follows. After temperature up-step changes, thermal sensation and skin temperature reach steady state within 30 min. However, the change in skin temperature caused by a short-term thermal experience does not disappear completely within 40 min. In addition to the influence of ambient temperature changes, activity intensity also influenced the variation in thermal sensation (subjective) and skin temperature (objective). These study results provide a scientific reference for future research and design of a temporary rest space in low ambient temperatures. Experimental studies including broader age groups and outdoor field tests are valuable for future research.

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Section: Skin Temperaturesupporting

confidence: 64%

Section: Introduction 1backgroundmentioning

confidence: 99%

Experimental Study on the Effect of Temperature Up-Step on Human Thermal Perception and Skin Temperature between Activity Intensities at Low Ambient Temperatures

2022

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“…Human beings interact with the environment in which they live, influencing and altering it, besides receiving influences. Sudden variations stimulate responses in the body [ 7 , 8 ], which can frequently represent damage to an individual’s health, depending on the intensity of the stimulus [ 9 , 10 ]. The body adapts to the frequent climatic conditions of the region; nonetheless, in the face of anomalous phenomena, the most sensitive individuals tend to have higher disease rates related to environmental perception variables [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Environmental and Socioeconomic Inequalities on Health Outcomes: A Multi-Region Time-Series Study

Silva

Wikuats

Hashimoto

et al. 2022

IJERPH

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The gradual increase in temperatures and changes in relative humidity, added to the aging and socioeconomic conditions of the population, may represent problems for public health, given that future projections predict even more noticeable changes in the climate and the age pyramid, which require analyses at an appropriate spatial scale. To our knowledge, an analysis of the synergic effects of several climatic and socioeconomic conditions on hospital admissions and deaths by cardiorespiratory and mental disorders has not yet been performed in Brazil. Statistical analyses were performed using public time series (1996–2015) of daily health and meteorological data from 16 metropolitan regions (in a subtropical climate zone in South America). Health data were stratified into six groups according to gender and age ranges (40–59; 60–79; and ≥80 years old) for each region. For the regression analysis, two distributions (Poisson and binomial negative) were tested with and without zero adjustments for the complete series and percentiles. Finally, the relative risks were calculated, and the effects based on exposure–response curves were evaluated and compared among regions. The negative binomial distribution fit the data best. High temperatures and low relative humidity were the most relevant risk factors for hospitalizations for cardiovascular diseases (lag = 0), while minimum temperatures were important for respiratory diseases (lag = 2 or 3 days). Temperature extremes, both high and low, were the most important risk factors for mental illnesses at lag 0. Groups with people over 60 years old presented higher risks for cardiovascular and respiratory diseases, while this was observed for the adult group (40-59 years old) in relation to mental disorders. In general, no major differences were found in the results between men and women. However, regions with higher urbanization levels presented risks, mainly for respiratory diseases, while the same was observed for cardiovascular diseases for regions with lower levels of urbanization. The Municipal Human Development Index is an important factor for the occurrence of diseases and deaths for all regions, depending on the evaluated group, representing high risks for health outcomes (the value for hospitalization for cardiovascular diseases was 1.6713 for the female adult group in the metropolitan region Palmas, and the value for hospitalization for respiratory diseases was 1.7274 for the female adult group in the metropolitan region Campo Mourão). In general, less developed regions have less access to adequate health care and better living conditions.

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Estimation of Heat Production Rate using Thermal Data During Exercise in Indoor Environments: A Study of Heat Storage Rate in Male Athletes

Balci,

Avci,

Colakoglu

et al. 2024

Int J Biometeorol

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Effect of environmental parameters on heat transfer characteristics and thermal sensation of human body with step change of temperature

Cited by 4 publications

References 20 publications

Experimental Study on the Effect of Temperature Up-Step on Human Thermal Perception and Skin Temperature between Activity Intensities at Low Ambient Temperatures

Experimental Study on the Effect of Temperature Up-Step on Human Thermal Perception and Skin Temperature between Activity Intensities at Low Ambient Temperatures

Effects of Environmental and Socioeconomic Inequalities on Health Outcomes: A Multi-Region Time-Series Study

Estimation of Heat Production Rate using Thermal Data During Exercise in Indoor Environments: A Study of Heat Storage Rate in Male Athletes

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