scholarly journals Parâmetros urbanísticos e o conforto térmico de cânions urbanos: o exemplo de Campinas, SP

2018 ◽  
Vol 18 (2) ◽  
pp. 177-196 ◽  
Author(s):  
Lígia Parreira Muniz-Gäal ◽  
Cláudia Cotrim Pezzuto ◽  
Marcius Fabius Hemriques de Carvalho ◽  
Lia Toledo Moreira Mota
Keyword(s):  
Equivalent Temperature ◽  
Physiological Equivalent Temperature

Resumo Os parâmetros construtivos das legislações de uso e ocupação do solo regulam a ocupação do território urbano, e as modificações que neles ocorrem impactam no clima das cidades. Buscando analisar como a legislação de uso e ocupação do solo interfere no microclima e no conforto térmico do pedestre, um cânion urbano da cidade de Campinas foi estudado por meio de simulações computacionais feitas no programa ENVI-met 4.0 preview. Foram propostos 48 cenários estabelecidos a partir da variação da taxa de ocupação, coeficiente de aproveitamento e orientação do cânion, e comparou-se o conforto térmico proporcionado por cada cenário através do índice PET (Physiological Equivalent Temperature). Os resultados mostraram que cenários com maior relação entre altura e largura do cânion (H/W maior do que 1,0) apresentam temperatura do ar máxima até 1,0 ºC mais baixa que cenários mais abertos (H/W igual a 0,4). O aumento da relação H/W amplia o sombreamento do cânion e reduz a variação da sensação de conforto diária. Com relação à orientação do cânion, verificou-se que aqueles orientados paralelamente à direção predominante dos ventos têm o potencial de resfriamento das superfícies intensificado pelo aumento de sua velocidade. Enfatiza-se a importância de relacionar parâmetros urbanísticos com o clima e o conforto térmico do pedestre.

Medical Emergencies During a Half Marathon Race – The Influence of Weather

2019 ◽  
Vol 40 (05) ◽  
pp. 312-316 ◽  
Author(s):  
Eric Carlström ◽  
Mats Borjesson ◽  
Gunnar Palm ◽  
Amir Khorram-Manesh ◽  
Fredrik Lindberg ◽  
...  
Keyword(s):  
Meteorological Data ◽  
Weather Conditions ◽  
Daily Maximum ◽  
Equivalent Temperature ◽  
Physiological Equivalent Temperature ◽  
Marathon Race ◽  
Air Temperatures ◽  
Medical Emergencies ◽  
Pet Index ◽  
Maximum Air Temperature

AbstractThe aim was to analyze the influence of weather conditions on medical emergencies in a half-marathon, specifically by evaluating its relation to the number of non-finishers, ambulance-required assistances, and collapses in need of ambulance as well as looking at the location of such emergencies on the race course. Seven years of data from the world’s largest half marathon were used. Meteorological data were obtained from a nearby weather station, and the Physiological Equivalent Temperature (PET) index was used as a measure of general weather conditions. Of the 315,919 race starters, 104 runners out of the 140 ambulance-required assistances needed ambulance services due to collapses. Maximum air temperature and PET significantly co-variated with ambulance-required assistances, collapses, and non-finishers (R2=0.65–0.92; p=0.001–0.03). When air temperatures vary between 15–29°C, an increase of 1°C results in an increase of 2.5 (0.008/1000) ambulance-required assistances, 2.5 (0.008/1000) collapses (needing ambulance services), and 107 (0.34/1000) non-finishers. The results also indicate that when the daily maximum PET varies between 18–35°C, an increase of 1°C PET results in an increase of 1.8 collapses (0.006/1000) needing ambulance services and 66 non-finishers (0.21/1000).

Physiological Equivalent Temperature Index and mortality in Tabriz (The northwest of Iran)

2018 ◽  
Vol 71 ◽  
pp. 195-201 ◽  
Author(s):  
Rahim Sharafkhani ◽  
Narges Khanjani ◽  
Bahram Bakhtiari ◽  
Yunes Jahani ◽  
Jafar Sadegh Tabrizi
Keyword(s):  
Equivalent Temperature ◽  
Physiological Equivalent Temperature ◽  
Temperature Index ◽  
Northwest Of Iran

Developing Physiological Equivalent Temperature and assessing hot and cold spots for small geographical areas in a subtropical city Hong Kong

2013 ◽  
Vol 2013 (1) ◽  
pp. 4822
Author(s):  
Qishi Zheng ◽  
Thuan Quoc Thach ◽  
Poh-Chin Lai ◽  
Patsy YK Chau ◽  
Crystal CY Choi ◽  
...  
Keyword(s):  
Hong Kong ◽  
Equivalent Temperature ◽  
Physiological Equivalent Temperature ◽  
Cold Spots

scholarly journals Assessment of Physiological Equivalent Temperature (PET) in Transitional Spaces of a High-Rise Building

2016 ◽  
Vol 1 (1) ◽  
pp. 348
Author(s):  
Nooriati Taib ◽  
Zalila Ali
Keyword(s):  
Thermal Comfort ◽  
Natural Ventilation ◽  
Publishing House ◽  
Office Building ◽  
Equivalent Temperature ◽  
Energy Usage ◽  
Physiological Equivalent Temperature ◽  
High Rise ◽  
Transitional Spaces ◽  
International Publishing

One passive approach that can significantly reduce energy usage in high-rise buildings is through the creation of non-air conditioned spaces such as transitional spaces. Optimizing passive design would reduce wastage associated with the building’s energy consumption. The study measures the thermal comfort of three types of transitional spaces (sky court, balcony, and rooftop) in a high-rise office building. Based on the assessment of Physiological Equivalent Temperature (PET), the outcome showed significant differences in PET in all locations in both wet and dry season. The effectiveness of such area can be improved with the contributions of landscape, maximizing natural ventilation and day lighting where possible.© 2016. The Authors. Published for AMER ABRA by e-International Publishing House, Ltd., UK. Peer–review under responsibility of AMER (Association of Malaysian Environment-Behaviour Researchers), ABRA (Association of Behavioural Researchers on Asians) and cE-Bs (Centre for Environment-Behaviour Studies, Faculty of Architecture, Planning & Surveying, Universiti Teknologi MARA, Malaysia.Keywords: Thermal comfort; transitional spaces; high-rise; Physiological Equivalent Temperature

scholarly journals In-situ Measurement of Pedestrian Outdoor Thermal Comfort in Universities Campus of Malaysia

2019 ◽  
Author(s):  
Nurnida Elmira Othman ◽  
Sheikh Ahmad Zaki ◽  
Nurul Huda Ahmad ◽  
Azli Razak
Keyword(s):  
Thermal Comfort ◽  
Field Measurement ◽  
Thermal Sensation ◽  
Outdoor Thermal Comfort ◽  
View Factor ◽  
Thermal Preference ◽  
Equivalent Temperature ◽  
Physiological Equivalent Temperature ◽  
Sky View Factor

The present study is intended to evaluate an outdoor thermal comfort at two universities campus in Malaysia. Field measurement and questionnaire survey were conducted simultaneously to assess the microclimatic condition and pedestrian thermal sensation. A total of 3033 samples were collected at seven different sky view factor (SVF) values that range from 0.2 to 0.9. The physiological equivalent temperature (PET) was estimated to evaluate outdoor thermal comfort. It was observed that at a highly shaded area (SVF < 0.35) the respondent’s thermal sensation vote (TSV) are neutral (> 25%), acceptable for thermal acceptance vote (TAV) (> 50%) and no change (> 50%) for thermal preference vote (TPV). For moderate shaded (0.35 ≤ SVF ≤ 0.70) TSV was voted as hot (> 25%), acceptable for TAV (40%), and prefer slightly cooler for TPV (>50%). For less shaded area (0.70 < SVF ≤ 1), TSV was voted as hot and very hot (> 25%), acceptable for TAV (>40%) and prefer slightly cooler for TPV (> 40%). Moreover, the PET value increases simultaneously with the increase of SVF. Results thus suggest that at any given activities such as sitting, walking, and standing also caused effects slightly on the way people thermally perceive it during the on-campus daytime.

The impact of green space structure on physiological equivalent temperature index in open space

Urban Climate ◽  
2020 ◽  
Vol 31 ◽  
pp. 100574 ◽  
Author(s):  
Jamshid Davtalab ◽  
Shahram Poor Deyhimi ◽  
Valentina Dessi ◽  
Mohammad Reza Hafezi ◽  
Morteza Adib
Keyword(s):  
Open Space ◽  
Green Space ◽  
Space Structure ◽  
Equivalent Temperature ◽  
Physiological Equivalent Temperature ◽  
Temperature Index ◽  
The Impact

Is Physiological Equivalent Temperature (PET) a superior screening tool for heat stress risk than Wet-Bulb Globe Temperature (WBGT) index? Eight years of data from the Gothenburg half marathon

2020 ◽  
pp. bjsports-2019-100632 ◽  
Author(s):  
Sofia Thorsson ◽  
David Rayner ◽  
Gunnar Palm ◽  
Fredrik Lindberg ◽  
Eric Carlström ◽  
...  
Keyword(s):  
Heat Stress ◽  
Screening Tool ◽  
Radiant Heat ◽  
Climate Index ◽  
Sporting Events ◽  
Equivalent Temperature ◽  
Physiological Equivalent Temperature ◽  
Wet Bulb Globe Temperature ◽  
Globe Temperature ◽  
Pet Index

BackgroundThe Wet-Bulb Globe Temperature (WBGT) index is a common tool to screen for heat stress for sporting events. However, the index has a number of limitations. Rational indices, such as the physiological equivalent temperature (PET) and Universal Thermal Climate Index (UTCI), are potential alternatives.AimTo identify the thermal index that best predicts ambulance-required assistances and collapses during a city half marathon.MethodsEight years (2010–2017) of meteorological and ambulance transport data, including medical records, from Gothenburg’s half-marathon were used to analyse associations between WBGT, PET and UTCI and the rates of ambulance-required assistances and collapses. All associations were evaluated by Monte-Carlo simulations and leave-one-out-cross-validation.ResultsThe PET index showed the strongest correlation with both the rate of ambulance-required assistances (R2=0.72, p=0.008) and collapses (R2=0.71, p=0.008), followed by the UTCI (R2=0.64, p=0.017; R2=0.64, p=0.017) whereas the WBGT index showed substantially poorer correlations (R2=0.56, p=0.031; R2=0.56, p=0.033). PET stages of stress, match the rates of collapses better that the WBGT flag colour warning. Compared with the PET, the WBGT underestimates heat stress, especially at high radiant heat load. The rate of collapses increases with increasing heat stress; large increase from the day before the race seems to have an impact of the rate of collapses.ConclusionWe contend that the PET is a better predictor of collapses during a half marathon than the WBGT. We call for further investigation of PET as a screening tool alongside WBGT.

Sign in / Sign up

Export Citation Format

Share Document