scholarly journals Solar Radiation and Daylighting Assessment Using the Sky-view Factor (SVF) Analysis as Method to Evaluate Urban Planning Densification Policies Impacts

2016 ◽  
Vol 91 ◽  
pp. 989-996 ◽  
Author(s):  
Cristina S. Polo López ◽  
Mariaemma Sala ◽  
Lavinia Ch. Tagliabue ◽  
Francesco Frontini ◽  
Salim Bouziri
Keyword(s):  
Urban Planning ◽  
Solar Radiation ◽  
View Factor ◽  
Sky View Factor

scholarly journals Calculation of the irradiance of solar radiation in a greenhouse with a complex structure using a diagram for sky view factor

2020 ◽  
Vol 76 (1) ◽  
pp. 44-52
Author(s):  
Shuh MATSUDA ◽  
Hisashi YOSHIKOSHI ◽  
Tomoyo SUZUKI ◽  
Yuuki OHTA ◽  
Ayaka CHIBA ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Complex Structure ◽  
View Factor ◽  
Sky View Factor

scholarly journals Comparisons on Calculating Methods of Total Daily Global Solar Radiation in Urban Area Based on Panoramic Images

2019 ◽  
Vol 136 ◽  
pp. 05010
Author(s):  
Moyan Zhang ◽  
Yan Liu ◽  
Ruixin Chen ◽  
Xiangfei Guo ◽  
Weiqing Yuan ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Urban Area ◽  
Morphological Characteristics ◽  
Global Solar Radiation ◽  
View Factor ◽  
Sky View Factor ◽  
Panoramic Images ◽  
Rayman Model ◽  
Morphology Characteristics ◽  
Tree View

In this paper, the total daily global solar radiation is tested at 18 locations with different morphological characteristics in Xi’an University of Architecture and Technology. PTgui is used to convert the panoramic pictures from Baidu Street Map to fisheye images. Sky view factor (SVF) and tree view factor (TVF) are calculated by Rayman model with fisheye images. SVF is used to calculate the total daily global solar radiation at the 18 locations with two different methods and TVF is used to classify the locations. The calculations and testing results are compared and combined the morphological characteristics. Then it is found that using suitable methods on different locations is necessary to obtain more accurate results whether the TVF (tree view factor) is more than 0.3 or less. To obtain solar radiation at different locations in the urban area, the calculating methods should be carefully chosen based on the morphology characteristics of the location.

scholarly journals Quantifying the Effect of Different Urban Planning Strategies on Heat Stress for Current and Future Climates in the Agglomeration of The Hague (The Netherlands)

Atmosphere ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 353 ◽  
Author(s):  
Sytse Koopmans ◽  
Reinder Ronda ◽  
Gert-Jan Steeneveld ◽  
Albert Holtslag ◽  
Albert Klein Tank
Keyword(s):  
Heat Stress ◽  
Urban Planning ◽  
View Factor ◽  
Climate Scenarios ◽  
High Rise ◽  
Vegetation Fraction ◽  
Sky View Factor ◽  
Green Areas ◽  
Planning Strategies ◽  
The Hague

In the Netherlands, there will be an urgent need for additional housing by the year 2040, which mainly has to be realized within the existing built environment rather than in the spatial extension of cities. In this data-driven study, we investigated the effects of different urban planning strategies on heat stress for the current climate and future climate scenarios (year 2050) for the urban agglomeration of The Hague. Heat stress is here expressed as the number of days exceeding minimum temperatures of 20 °C in a year. Thereto, we applied a diagnostic equation to determine the daily maximum urban heat island based on routine meteorological observations and straightforward urban morphological properties including the sky-view factor and the vegetation fraction. Moreover, we utilized the Royal Netherlands Meteorological Institute’s (KNMI) climate scenarios to transform present-day meteorological hourly time series into the future time series. The urban planning strategies differ in replacing low- and mid-rise buildings with high-rise buildings (which reduces the sky-view factor), and constructing buildings on green areas (which reduces the vegetation fraction). We found that, in most cases, the vegetation fraction is a more critical parameter than the sky-view factor to minimize the extra heat stress incurred when densifying the neighbourhood. This means that an urban planning strategy consisting of high-rise buildings and preserved green areas is often the best solution. Still, climate change will have a larger impact on heat stress for the year 2050 than the imposed urban densification.

scholarly journals Research on Calculation Method of Total Solar Radiation of Urban Settlements Based on Parametric 3D Model

2019 ◽  
Vol 136 ◽  
pp. 05012
Author(s):  
Ruixin Chen ◽  
Yan Liu ◽  
Moyan Zhang ◽  
Qi Li ◽  
Hao Zhang ◽  
...  
Keyword(s):  
Solar Radiation ◽  
3D Model ◽  
Calculation Model ◽  
Measured Data ◽  
View Factor ◽  
Total Solar Radiation ◽  
Preliminary Design ◽  
The Sustainable Development ◽  
Sky View Factor ◽  
Urban Settlements

Solar radiation is a major factor in promoting the sustainable development of urban settlements. To understand the distribution of solar radiation in urban settlements, this paper develops the sky view factor (SVF) algorithm based on the parameterization platform to simplify the calculation of solar radiation. In this paper, the test of total solar radiation is carried out in 18 different locations in Xi'an University of Architecture and Technology. The total solar radiation of 18 points is calculated using the SVF-based calculation model. Comparing the calculated results with the measured results, it is found that the calculated values are consistent with the measured values. The results show that the algorithm is consistent with the measured data. It shows the effectiveness and high precision of the proposed algorithm. The algorithm can calculate the total solar radiation more quickly, and provide technical support for urban preliminary design schemes in urban microclimate.

scholarly journals Evaluation of global solar radiation, cloudiness index and sky view factor as potential indicators of Ghana's solar energy resource

2021 ◽  
pp. e01061
Author(s):  
Michael Tanu ◽  
William Amponsah ◽  
Bashiru Yahaya ◽  
Enoch Bessah ◽  
Samuel Owusu Ansah ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Energy Resource ◽  
Global Solar Radiation ◽  
View Factor ◽  
Sky View Factor

Positional error modeling of sky‐view factor measurements within urban street canyons

2021 ◽  
Author(s):  
Zian Wang ◽  
Guoan Tang ◽  
Guonian Lü ◽  
Cheng Ye ◽  
Fangzhuo Zhou ◽  
...  
Keyword(s):  
Error Modeling ◽  
View Factor ◽  
Positional Error ◽  
Street Canyons ◽  
Urban Street ◽  
Sky View Factor ◽  
Urban Street Canyons

scholarly journals The study of urban climate and traffic: Considerations from the Araraquara case, SP

2019 ◽  
Vol 111 ◽  
pp. 02070
Author(s):  
Clélia Mendonça de Moraes ◽  
Edson Melanda ◽  
Nilson Roberto de Barros Carneiro
Keyword(s):  
Urban Planning ◽  
Solar Radiation ◽  
Traffic Accident ◽  
Urban Climate ◽  
Urban Sustainability ◽  
Climatic Variables ◽  
Urban Mobility ◽  
Urban Geometry ◽  
Green Areas ◽  
Urban Microclimates

The article discusses the interface between the influence of the urban climate and the traffic accident, there are as reference the results of the research carried out for the Araraquara case, SP, Brazil. Initially presented a brief analysis of urban mobility, geoprocessing (GIS) and the climatic importance in relation to urban sustainability. The article analyzes the urban climate of Araraquara, especially with regard to solar radiation on city streets and green areas. It was based on the premise that there is a correlation between the urban microclimates and the variables related to the traffic accident. Thus, a georeferenced mapping of the urban geometry was carried out by associating the climatic variables such as solar radiation, temperature and humidity of the air, to three parameters related to the traffic accident were chosen from the a) traffic accident with victim, b) without victim and c) motorcycle. At the end, the article proposes how the results found can reduce traffic accident and contribute to urban planning

Development of synthetic hemispheric projections suitable for assessing the sky view factor on vertical planes

2015 ◽  
Vol 74 ◽  
pp. 279-286 ◽  
Author(s):  
J. Ramírez-Faz ◽  
R. López-Luque ◽  
F.J. Casares
Keyword(s):  
View Factor ◽  
Sky View Factor

scholarly journals Application of Method for Calculating Sky View Factor Using Google Street View: Relation Between Sky View Factor and Physical Elements in Urban Space

2019 ◽  
Vol 2 ◽  
pp. 1-8
Author(s):  
Shoko Nishio ◽  
Fumiko Ito
Keyword(s):  
Urban Space ◽  
Computation Method ◽  
View Factor ◽  
Statistical Process ◽  
Google Street View ◽  
Sky View Factor ◽  
Street View ◽  
The Difference ◽  
Physical Elements

<p><strong>Abstract.</strong> We applied a computation method of calculating the sky view factor (SVF) using Google Street View to Shibuya area, Tokyo, for the purpose of examining the relation between the SVF/SVF change and physical elements. The distribution of the SVF calculated by the above method was visualized, and the statistical process showed the tendency of a high SVF in quasi-residential districts and roadsides of high-graded trunk roads. The difference in the SVF change was small at 10-m intervals. The SVF change tended to be more apparent near an intersection and at different elevations.</p>

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