Thermal sensation in outdoor urban spaces: a study in a Tropical Savannah climate, Brazil

Borges, Vera Cristina de Area Leão; Callejas, Ivan Júlio Apolônio; Durante, Luciane Cleonice

doi:10.1007/s00484-019-01830-x

Cited by 19 publications

(5 citation statements)

References 25 publications

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“…The differences concerning what was observed in the south of Brazil are partially associated with the need for the population of that region to acclimatize to wide thermal variations throughout the year, due to more severe winters, which does not occur in the Brazilian tropical region, where high air temperatures prevail throughout the year, with a virtually absent winter, characterized only by milder temperatures. In fact, as a cultural aspect, people yearn for the first cold days of the season, as a form of relief from the constant hot stress conditions [13]. The line derived for the study region is dissimilar to that proposed for Europe at 6.8 • C, reflecting not only local inhabitant acclimatization, but also the influence of the morphological configuration of the physical elements that make up the courtyard and subjective factors [14].…”

Section: Thermal Sensation Category Calibrationmentioning

confidence: 63%

“…During the measurement campaigns, on milder temperature days, the average thermal resistance of the interviewees' clothing was 0.68 clo, which corresponds to the typical clothing of the region plus a jacket or coat. In this regard, a behavioral aspect observed in the region indicates that the local population use lower cloth insulation during cold days than those who live in Europe, which is attributed to the absence of adequate clothing insulation for cold stress conditions, since interviewees wore overlapping light clothing during the field campaign [13].…”

Section: Characterization Of Personal Variablesmentioning

confidence: 99%

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Thermal Sensation in Courtyards: Potentialities as a Passive Strategy in Tropical Climates

et al. 2020

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Climate change will bring changes to our living conditions, particularly in urban areas. Climate-responsive design strategies through courtyards can help to moderate temperatures and reduce the thermal stress of its occupants. Thermal response inside courtyard is affected not only by its morphological composition but also by subjective factors. Thus, standardized thermal scales may not reflect the stress of the occupants. This study investigated the impact on thermal attenuation provided by a courtyard located in a tropical climate under extreme cold and hot synoptic conditions by means of local thermal sensation scales. Microclimatic variables were monitored, simultaneously with the application of a thermal comfort questionnaire, by using weather stations installed outside and inside the courtyard. The Modified Physiological Equivalent Temperature Index (mPET) was utilized to predict the heat stress. Calibration was conducted using linear regression to attribute particular thermal sensation votes to correspondent mPET values. It was found that thermal sensation can be affected by factors such as psychological, behavioral, and physiological. The courtyard’s form provides a passive cooling effect, stabilizing interior thermal sensation, with attenuation peaks of 6.4 °C on a cold day and 5.0 °C on a hot day. Courtyards are an alternative passive strategy to improve thermal ambience in tropical climate, counterbalancing climate change.

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Section: Thermal Sensation Category Calibrationmentioning

confidence: 63%

Section: Characterization Of Personal Variablesmentioning

confidence: 99%

Thermal Sensation in Courtyards: Potentialities as a Passive Strategy in Tropical Climates

et al. 2020

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“…A series of surveys focus on finding suitable thermal comfort indices for assessing human thermal sensation and comfort. According to previous studies, PMV [2,[40][41][42][43], PET [42,44,45], UTCI [4,25,42,[46][47][48][49][50] and SET* [49,51,52] are better predictors of the thermal comfort of people in outdoor environments. Previous studies in Tehran revealed that PET in winter [26], PET, and UTCI for the whole year work better to predict people's thermal conditions [27].…”

Section: Discussionmentioning

confidence: 89%

Analyzing Thermal Comfort Sensations in Semi-Outdoor Space on a University Campus: On-Site Measurements in Tehran’s Hot and Cold Seasons

et al. 2022

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Outdoor and semi-outdoor thermal comfort on the university campus is essential for encouraging students’ outdoor activities and interactions and reducing energy consumption in occupied buildings. For this reason, the current study presents on-site measurements and questionnaire surveys on a university campus in Tehran, Iran. It aims to investigate the most applicable thermal indices in Tehran’s cold and hot seasons. Measurements were conducted over winter and summer days; in addition, the survey collected 384 responses. The results confirm that the Predicted Mean Vote (PMV) and Physiological Equivalent Temperature (PET) indices are better predictors of semi-outdoor thermal comfort in summer and winter than Universal Thermal Climate Index (UTCI) and New Standard Effective Temperature (SET*), respectively, highlighting the importance of considering accurate thermal indices in different seasons. Finally, all analyses were gathered in a predictive empirical model, knowledge of which may be helpful in the planning and design of outdoor and semi-outdoor environments in Tehran and similar climates.

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“…In Tanzania Dar es Salaam, Ndetto and Matzarakis found that the thermal comfort range is 23-31 °C of PET, which is much higher than the thermal comfort range in temperate climates [98]. In the thermal sensation assessment of Brazil, de Arêa Leão Borges et al found that the thermal comfort zone lies between 21.5 and 28.5 °C, with both thresholds higher than those observed in studies conducted in subtropical, Mediterranean, and continental temperate climates [99]. In hot climates, people have a high tolerance to climatic conditions, but a neutral temperature cannot be considered a comfortable temperature because people may be satisfied with a lower temperature [100].…”

Section: Urban Climaticmentioning

confidence: 91%

A Review of Thermal Comfort Evaluation and Improvement in Urban Outdoor Spaces

Liu,

Li,

2023

Buildings

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Urban outdoor space is an important activity place for residents, and its thermal environment directly affects residents’ quality of life and physical and mental health. Due to global climate change and the acceleration of urbanization, the outdoor thermal comfort of urban residents has seriously declined, causing more and more scholars to pay attention to this problem and to carry out research. This paper summarizes the development history and evaluation principles of outdoor thermal comfort evaluation indices and sorts out the methods for achieving outdoor thermal comfort. This paper reviews the effects of urban climate, local microclimate, physiological, psychological, social, and cultural factors on outdoor thermal comfort. In addition, strategies for improving thermal comfort in urban outdoor spaces are discussed from the aspects of urban geometry, vegetation, surface materials, and water bodies. Finally, the existing problems and development directions of current urban outdoor space thermal comfort studies are pointed out. This review paper can provide a reference for the scientific planning and construction of urban outdoor spaces to improve people’s thermal comfort.

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Thermal sensation in outdoor urban spaces: a study in a Tropical Savannah climate, Brazil

Cited by 19 publications

References 25 publications

Thermal Sensation in Courtyards: Potentialities as a Passive Strategy in Tropical Climates

Thermal Sensation in Courtyards: Potentialities as a Passive Strategy in Tropical Climates

Analyzing Thermal Comfort Sensations in Semi-Outdoor Space on a University Campus: On-Site Measurements in Tehran’s Hot and Cold Seasons

A Review of Thermal Comfort Evaluation and Improvement in Urban Outdoor Spaces

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