PERANAN UNSUR-UNSUR RUANG TERBUKA PADA TINGKAT KENYAMANAN TERMAL OUTDOOR: ANTARA PERSEPSI DAN PENGETAHUAN

2018 ◽  
Vol 12 (1) ◽  
pp. 41
Author(s):  
Floriberta Binarti ◽  
Hanson E Kusuma ◽  
Surjamanto Wonorahardjo ◽  
Sugeng Triyadi
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Spatial Perception ◽  
Psychological Adaptation ◽  
Comfort Level ◽  
Anthropogenic Heat ◽  
Outdoor Thermal Comfort ◽  
Online Questionnaire ◽  
Comfort Perception

Abstract: Surface morphology, surface material, greenery, anthropogenic heat and air pollutants are known as the elements that determine the thermal environment performance. These elements, hence, should determine the outdoor thermal comfort level. However, previous studies mentioned that the role of psychological adaptation in outdoor thermal comfort is greater than in the indoor. Therefore, exploring perceived elements, which determine the thermal environment, could enrich the perspective of a design approach of thermally comfortable open spaces. This study aims to explore the perceived elements of thermal environment, which contribute to the outdoor thermal comfort using open-ended questions of an online questionnaire. Several keywords obtained by the content analysis of 101 respondents’ answers affirm the role of the thermal environment elements in modifying the thermal environment. Tree or greenery, the most frequently appeared keyword, showed as the strongest perceived element. New keywords that significantly appeared; i.e. visual aspects, supporting facilities, and tranquility; indicate the importance of thermo-spatial perception approach in designing livable and thermally comfortable outdoor environment.Keywords: elements of thermal environment, outdoor thermal comfort, perception, psychological adaptation,Abstraksi: Morfologi permukaan, permukaan material, area hijau, panas antropogenik dan polutan udara diketahui sebagai elemen-elemen yang menentukan performansi lingkungan termal. Dengan demikian, elemen-elemen tersebut seharusnya menentukan tingkat kenyamanan termal outdoor. Namun, beberapa studi menyebutkan peranan adaptasi psikis pada kenyamanan termal outdoor yang lebih besar dibandingkan pada kenyamanan termal indoor. Oleh karenanya, eksplorasi elemen-elemen yang dipersepsikan menentukan lingkungan termal dapat memperkaya perspektif pendekatan studi ruang terbuka yang nyaman secara termal. Studi ini bertujuan untuk menggali elemen-elemen lingkungan termal yang dipersepsikan berperan pada kenyamanan termal outdoor dengan menggunakan pertanyaan-pertanyaan yang bersifat open-ended di dalam kuesioner online. Beberapa kata kunci yang dihasilkan oleh analisis konten dari 101 responden mengkonfirmasi peranan elemen-elemen lingkungan termal di dalam memodifikasi lingkungan termal. Pohon atau greenery, kata kunci yang paling sering muncul, menunjukkan sebagai elemen yang dipersepsikan paling kuat. Kata kunci baru yang muncul secara signifikan, yaitu: aspek visual, fasilitas penunjang, dan ketenangan; mengindikasikan pentingnya pendekatan persepsi termo-spasial di dalam merancang lingkungan outdoor yang hidup dan nyaman secara termal.Kata kunci: adaptasi psikis, kenyamanan termal outdoor, persepsi, unsur-unsur lingkungan termal

scholarly journals Outdoor Thermal Comfort at a University Campus: Studies from Personal and Long-Term Thermal History Perspectives

2020 ◽  
Vol 12 (21) ◽  
pp. 9284
Author(s):  
Jiao Xue ◽  
Xiao Hu ◽  
Shu Nuke Sani ◽  
Yuanyuan Wu ◽  
Xinyu Li ◽  
...  
Keyword(s):  
Thermal Comfort ◽  
Thermal History ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Cold Climate ◽  
Outdoor Thermal Comfort ◽  
Climate Index ◽  
University Campus ◽  
Winter Climate

Thermally comfortable outdoor spaces have contributed to high-quality urban living. In order to provide a further understanding of the influences of gender and long-term thermal history on outdoor thermal comfort, this study conducted field surveys at a university campus in Shanghai, China by carrying out microclimatic monitoring and subjective questionnaires from May to October, 2019. The analysis of collected data found that, during our survey, 57% of the occupants felt comfortable overall and 40–60% of them perceived the microclimate variables (air temperature, humidity, solar radiation, and wind speed) as “neutral”. The universal thermal climate index (UTCI) provided a better correlation with occupant thermal sensation than the physiologically equivalent temperature (PET). Females were more sensitive to the outdoor thermal environment than males. Older age led to lower thermal sensation, but the thermal sensitivities for age groups of <20, 20–50, and >50 were similar. Occupants who had resided in Shanghai for a longer period showed higher overall comfort rating and lower thermal sensation. Interviewees who came from hot summer and cold winter climate regions were less effected by the change of UTCI than those from severe cold or cold climate regions.

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.

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 Evaluation of Thermal Comfort in the Traditional Bourgeoisie Houses in Beirut

2020 ◽  
Vol 3 (1) ◽  
pp. p1
Author(s):  
Jad Hammoud ◽  
Elise Abi Rached
Keyword(s):  
Thermal Comfort ◽  
Natural Ventilation ◽  
Heat Waves ◽  
Thermal Environment ◽  
Thermal Sensation ◽  
Residential Buildings ◽  
Ventilation System ◽  
Electricity Consumption ◽  
Comfort Level ◽  
Climate Zones

The increasing of energy demands has considerably increased the requirements for new and traditional buildings in different climate zones. Unprecedented heat waves have increased climate temperature, in particular, in moderate climate zones such as Lebanon. In Beirut, only the residential sector consumes 50% of total electricity consumption. HVAC (Heating, Ventilation and Air conditioning) systems are used to reach acceptable thermal comfort levels in the new residential buildings. In case of the traditional bourgeoisie houses in Beirut, there are no discussions about the use of HVAC systems to achieve the required thermal comfort level. Thus, to reach an acceptable thermal comfort level, these houses which already contain natural ventilation system shall adapt the modern thermal comfort requirements and thermal comfort strategies and technologies where their architectural features and existing materials condition the available solutions. In order to identify the best options within the possible intervention lines (envelopes, passive strategies, equipment, renewable energy systems), it is necessary to perceive the real performance of this type of houses. In this context, the article presents the results of the study of thermal performance and comfort in a three case studies located in Beirut. Detailed field data records collected are analyzed, with a view to identify the indoor thermal environment with respect to outdoor thermal environment in different seasons. Monitoring also included measurement of hygrothermal parameters and surveys of occupant thermal sensation.

scholarly journals Analyzing the Effect of Water Body on the Thermal Environment and Comfort at Indoor and Outdoor Spaces in Tropical University Campus

2021 ◽  
Vol 12 (10) ◽  
pp. 282-288
Author(s):  
Farhadur Reza ◽  
◽  
Shoichi Kojima ◽  
Wataru Ando
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Outdoor Thermal Comfort ◽  
University Campus ◽  
Clothing Insulation ◽  
Comfort Index ◽  
Outdoor Spaces ◽  
Globe Temperature ◽  
And Performance ◽  
University Spaces

Water bodies play a significant role in its surrounding thermal environment. Thermal comfort in university spaces is critical that affects the students’ health and performance as well as the staffs. This study investigated thermal environment and comfort near lakeside and non-lakeside tropical university spaces. Standard Effective Temperature (SET*) have been calculated using recorded air temperature, relative humidity, globe temperature, air velocity, clothing insulation and metabolic rate to evaluate the thermal comfort in outdoor and indoor spaces. The effects of weather parameters have been clearly visible on the comfort index. The calculated SET* values indicate that the outdoor thermal comfort near a lake is much closer to the standard comfort zone than non-lakeside outdoor space. In the case of indoor thermal comfort, however, slightly a different scenario has been observed. To achieve the desirable indoor thermal environment, some design considerations are recommended based on findings.

The role of urban morphology on outdoor thermal comfort: The case of Al-Sharq City – Az Zarqa

Urban Climate ◽  
2020 ◽  
Vol 34 ◽  
pp. 100706 ◽  
Author(s):  
Hanin Abdel Salam Othman ◽  
Abdulsalam Ahmad Alshboul
Keyword(s):  
Thermal Comfort ◽  
Urban Morphology ◽  
Outdoor Thermal Comfort

scholarly journals Impact of solar reflectance of wall and road on outdoor thermal comfort - experimental study in a street canyon setup

2019 ◽  
Vol 282 ◽  
pp. 02010
Author(s):  
Kiran Kumar D E V S ◽  
Man Pun Wan ◽  
Mandi Zhou ◽  
Yongping Long ◽  
Bing Feng Ng
Keyword(s):  
Solar Radiation ◽  
Thermal Comfort ◽  
Street Canyon ◽  
Thermal Environment ◽  
Longwave Radiation ◽  
Environmental Parameters ◽  
Outdoor Thermal Comfort ◽  
Width Ratio ◽  
Diffuse Solar Radiation ◽  
Solar Reflectance

Thermal environment in an urban street canyon is primarily affected by prevailing air conditions, wind flow, solar radiation as well as thermal properties of the surrounding urban structures and pavement surfaces that affect the reflection, absorption and re-emission of solar radiation. Experiments were conducted in a 1:5 scale test setup consisting of North-South oriented street canyon (height to width ratio 1.7) located in Singapore. Test cases covering two levels solar reflectance of walls (0.35 and 0.57) and road (0.12 and 0.55) were conducted in a three-month period. Environmental parameters including direct beam and diffuse solar radiation, net radiation (incoming and outgoing shortwave and longwave radiation) and wind speed were continuously measured at the top of the canyon. Thermal comfort parameters including air temperature, relative humidity, air velocity and globe temperature were also monitored continuously inside the street canyon. When the solar reflectance of canyon surfaces increases, mean radiant temperature (MRT) reduces by up to 1.2°C during daytime and 2.5°C during the night. Such reduction leads to reduced occurrence of heat stress by 34% and 42% during the day and night times, respectively, as measured by the universal thermal comfort index (UTCI). This paper further discusses the effect of longwave radiation on MRT in the street canyon due to changes in canyon solar reflectance.

Study on Outdoor and Semi-Outdoor Thermal Comfort of College Campus in Central Taiwan

2014 ◽  
Vol 1030-1032 ◽  
pp. 624-628
Author(s):  
Wen Pei Sung ◽  
Shih Tai Hu ◽  
Yu Kuang Zhao ◽  
Lei Wei
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Outdoor Environment ◽  
Outdoor Thermal Comfort ◽  
Small Island ◽  
Air Conditioner ◽  
Subtropical Zone ◽  
Outdoor Thermal Environment ◽  
Outdoor Comfort ◽  
Central Taiwan

Taiwan is a small island. Some of college campuses are very tiny with large hard pavement to cause un-comfortable outdoor environment. Most of faculty and students like to stay at classroom and use air-conditioner to establish comfort thermal environment. Thus, the outdoor and semi-outdoor thermal equipments are used to detect the parameters of weather. The test and analysis results show that hard pavements cause the un-comfortable outdoor comfort. Mean Radiant Temperatures of grass in summer is higher than the other pavement because that grass pavement is lack of moisture to causes bad outdoor thermal comfort. Therefore, the fine outdoor and semi-outdoor thermal comfort environment should consider the permeable pavement and grass with suitable moisture to cause better outdoor thermal environment and large arbores should be planted widely in campus to establish a better semi-outdoor thermal temperature in campus of the subtropical zone.

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