scholarly journals Investigating outdoor thermal comfort of educational building complex in urban area: A case study in Universitas Kebangsaan, Bandung city

2021 ◽  
Vol 25 (2) ◽  
pp. 85-101
Author(s):  
Try Ramadhan ◽  
Aldissain Jurizat ◽  
Andina Syafrina ◽  
Amat Rahmat
Keyword(s):  
Wind Speed ◽  
Thermal Comfort ◽  
Urban Area ◽  
Outer Space ◽  
Influential Factors ◽  
Outdoor Environment ◽  
Outdoor Thermal Comfort ◽  
Design Development ◽  
Campus Building

Campus building was a place to accommodate various educational activities, which were both carried out indoors and outdoors. The environment, including the building and its exterior, provided thermal comfort that was influenced by the context, such as the mass of the facility, vegetation, and constructing envelope materials. The microclimate also influenced the environment, such as temperature, wind speed, and humidity. This study aimed to investigate the outdoor thermal comfort of campus building in urban area during summer, while also identifying the influential factors. This research referred to a case study, examining the thermal quality of the educational building environment using ENVI-met software, based on the Predicted Mean Vote (PMV) index as an indicator of outdoor thermal comfort, in Universitas Kebangsaan (UK). The results showed that the outdoor environment had low thermal comfort conditions during the day, as it also had different thermal satisfactory situations, due to differences in physical characteristics in each zone. This characteristics included, (1) The SVF determinant as indicators of the shading factor should be supported by the presence of vegetation and the use of pavement material, (2) Although the wind speed factor does not really affect the thermal comfort in the outdoor space, the interconnection between open gaps is likely to make breeze distribution in the area better. This study offered direction for campus planning, in order to maintain the optimal capacity of the natural environment, such as (1) Strategizing to create a better shadowing factor in the outer space, which was supported by controlling the use of pavement materials, (2) Directing the density of buildings by making open spaces more permeable, in order for better wind distribution in the area. From this study, the campus current conditions and future design development potential was also observed.

Implications of Building Material Choice on Outdoor Microclimate for Sustainable Built Environment

2015 ◽  
Vol 650 ◽  
pp. 82-90 ◽  
Author(s):  
D. Kannamma ◽  
A. Meenatchi Sundaram
Keyword(s):  
Thermal Comfort ◽  
Building Material ◽  
Building Materials ◽  
Climatic Factors ◽  
Outdoor Environment ◽  
Outdoor Thermal Comfort ◽  
Physical Factors ◽  
Physiological Equivalent Temperature ◽  
Material Choice ◽  
The Impact

The climatic conditions in a man-made urban environment may differ appreciably from those in the surrounding natural or rural environs.... each urban man-made buildings, roads, parking area, factories......creates around and above it a modified climate with which it interacts [1].Outdoor thermal comfort has gained importance in thermal comfort studies especially in tropical countries. In country like India, culturally the activities are spread both indoors and outdoors. Therefore the need for ambient outdoor environment gains importance. As there are many factors that contribute to outdoor thermal comfort (climatic factors and physical factors), this study aims in analyzing the impact of building material contribution, in an institutional courtyard. In order to understand the thermal contribution of various building materials and to suggest material choice to designers, ENVIMET is used for simulation purpose. The outdoor thermal comfort index employed in this study is PET (Physiological Equivalent Temperature), calibrated using RAYMAN.

Study on outdoor thermal comfort on a campus in a subtropical urban area in summer

2016 ◽  
Vol 22 ◽  
pp. 164-170 ◽  
Author(s):  
Lingjun Zhao ◽  
Xiaoqing Zhou ◽  
Li Li ◽  
Shiquan He ◽  
Raochao Chen
Keyword(s):  
Thermal Comfort ◽  
Urban Area ◽  
Outdoor Thermal Comfort

scholarly journals Effect of direct solar projected area factor on outdoor thermal comfort evaluation: A case study in Shanghai, China

Urban Climate ◽  
2022 ◽  
Vol 41 ◽  
pp. 101033
Author(s):  
Zhengrong Li ◽  
Xiwen Feng ◽  
Xueke Fan ◽  
Jingting Sun ◽  
Zhaosong Fang
Keyword(s):  
Thermal Comfort ◽  
Outdoor Thermal Comfort ◽  
Projected Area ◽  
Comfort Evaluation

Towards Pedestrian Microclimatic Comfort: A Rapid Predication Model for Street Winds and Pedestrian Thermal Sensation

Nano LIFE ◽  
2018 ◽  
Vol 08 (02) ◽  
pp. 1840006
Author(s):  
Jing Li ◽  
Mengnan Qi ◽  
Qiuhua Duan ◽  
Lei Huo ◽  
Julian Wang
Keyword(s):  
Wind Speed ◽  
Built Environment ◽  
Thermal Comfort ◽  
Air Temperature ◽  
Goodness Of Fit ◽  
Comfort Level ◽  
Outdoor Thermal Comfort ◽  
Design Parameters ◽  
Rapid Urbanization ◽  
The Impact

Significant changes in the urban built environment have occurred due to rapid urbanization and increases in the urban population. Such alterations may produce environmental health-related issues such as urban heat stress, air pollution and traffic noise. This research undertook a field study to collect data including urban design parameters, micro-environmental factors and city climatic information. This work was conducted over a two-year period on three pedestrian streets located in high-density urban areas in Beijing. These areas were selected in order to study the influences of urban street canyon texture within a particular geometric layout, wind flow corridors and variations in air temperature on pedestrian microclimatic comfort. The results will facilitate the work of urban planners by providing them with information for use in improving outdoor thermal comfort through their designs. A total of 60[Formula: see text]485 samples were organized into training, validation and test sets. We confirmed our hypothesis that internal wind speed ([Formula: see text] is attributable mainly to the urban texture coefficient ([Formula: see text], air temperature ([Formula: see text] and leading-in wind speed ([Formula: see text]. The model was tested using the test data collected onsite, which demonstrated a very accurate goodness-of-fit; the model achieved an R-squared value of 0.82, which meant that [Formula: see text] as a dependent variable was 82% correlated to the three predictors as independent variables. With this computer simulation, urban planners can now predict and visualize the impact of changes on the built environment in terms of either the direction of solar radiation received or increases in wind speed, in return for the desired thermal comfort level for residents of the neighborhood.

Study on Design Strategies for Improving Outdoor Thermal Comfort in the Cold Regions of China

2011 ◽  
Vol 250-253 ◽  
pp. 3798-3801 ◽  
Author(s):  
Jing Li ◽  
Yu Liu
Keyword(s):  
Thermal Comfort ◽  
North China ◽  
Outdoor Environment ◽  
Outdoor Thermal Comfort ◽  
Design Strategies ◽  
Cold Regions ◽  
Winter Climate ◽  
Thermal Environments ◽  
The North ◽  
Xi’An City

Along with the improvement of dwelling quality, the length of time and frequency of outdoor activities in winter greatly increase in the north China area, although the outdoor thermal environments are still unsatisfactory. It is necessary for both planners and architects to improve outdoor thermal environments in the cold regions of north China. This paper firstly introduces the general winter climate features in some north China cities. Then, it takes Xi'an city as an example to show the shortage of uncomfortable outdoor environment. Thirdly, the design strategies to improve outdoors thermal comfort include wind and snow protection, sunlight usage, environmental zones and recreational facilities, etc. are discussed.

scholarly journals DESIGNING PUBLIC SQUARES TO OPTIMIZE HUMAN OUTDOOR THERMAL COMFORT: A CASE STUDY IN SAFRANBOLU

2021 ◽  
pp. 13-20
Author(s):  
Ömer ÖZEREN ◽  
Merve TUNA KAYILI
Keyword(s):  
Thermal Comfort ◽  
Outdoor Thermal Comfort ◽  
Type Number ◽  
Green Areas ◽  
Comfort Perception ◽  
Design Proposal ◽  
Flooring Materials ◽  
Tree Type

Within the scope of the study, thermal comfort analysis was performed using the ENVI-met program of the Misak-ı Milli Square in Safranbolu, and it was determined that the thermal comfort perception of the square as slighty warm-warm. For this reason, a new design proposal has been submitted for the square. In the proposal, the green ratio and the number of trees was increased, the type and location of the trees was changed. The flooring materials was replaced with a stone covering with a higher albedo and new functional suggestions were made for the square. As a result of the thermal comfort analysis of the new proposal, the thermal comfort perception in the square was neutral and the thermal dissatisfaction rate was reduced below 14.5%. In result of the study, it was underlined that the ratio of green areas and the tree type, number and location that constitute it and the choice of flooring materials are important parameters in providing the thermal comfort of the square.

scholarly journals PAIR INFLUENCE OF WIND SPEED AND MEAN RADIANT TEMPERATURE ON OUTDOOR THERMAL COMFORT OF HUMID TROPICAL ENVIRONMENT

2017 ◽  
Vol 10 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Sangkertadi Sangkertadi ◽  
Reny Syafriny
Keyword(s):  
Wind Speed ◽  
Thermal Comfort ◽  
Significant Role ◽  
Tropical Environment ◽  
Outdoor Thermal Comfort ◽  
Regression Equations ◽  
Mean Radiant Temperature ◽  
Walking Activity ◽  
Globe Temperature ◽  
Radiant Temperature

The purposes of this article is to explore knowledge of outdoor thermal comfort in humid tropical environment for urban activities especially for people in walking activity, and those who stationary/seated with moderate action. It will be characterized the pair influence of wind speed and radiant temperature on the outdoor thermal comfort. Many of researchers stated that those two microclimate variables give significant role on outdoor thermal comfort in tropical humid area. Outdoor Tropical Comfort (OTC) model was used for simulation in this study. The model output is comfort scale that refers on ASHRAE definition. The model consists of two regression equations with variables of air temperature, globe temperature, wind speed, humidity and body posture, for two types of activity: walking and seated. From the results it can be stated that there is significant role of wind speed to reduce mean radiant temperature and globe temperature, when the velocity is elevated from 0.5 m/s to 2 m/s. However, the wind has not play significant role when the speed is changed from 2 m/s to 3.5 m/s. The results of the study may inspire us to implement effectiveness of electrical-fan equipment for outdoor space in order to get optimum wind speed, coupled with optimum design of shading devices to minimize radiant temperature for thermal comfort.

scholarly journals Study on Outdoor Thermal Comfort in the Transitional Season of Hefei

2020 ◽  
Vol 165 ◽  
pp. 01026
Author(s):  
Jinwei Li ◽  
Lilin Zhao ◽  
Zheyao Peng ◽  
Zijian Wang ◽  
Taotao Shui
Keyword(s):  
Thermal Comfort ◽  
Thermal Sensation ◽  
Outdoor Environment ◽  
Outdoor Thermal Comfort ◽  
Human Thermal Comfort ◽  
Transition Season ◽  
Before And After ◽  
Effects Of Temperature ◽  
Autumn And Winter ◽  
The Relationship

In order to study the outdoor thermal comfort during the transition season in Hefei, a university in Hefei adopted a combination of field environmental measurements and questionnaires to study the changes in thermal sensation and thermal comfort of outdoor people before and after the transition season. The rankings of the effects of temperature, wind speed, humidity, and solar radiation on human thermal comfort were obtained through surveys, and the proportion of each parameter’s influence on human thermal comfort was analyzed. The relationship between thermal sensation and thermal comfort was analyzed, and the application was established through regression analysis Prediction model of thermal sensation in autumn and winter outdoor environment in Hefei area.

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