1. Study onThe Affectof AspectBuildingForm and BETA PARAMITA HIROATSU FUKUDALayout KITA KYUSHU UNIVERSITY 1-1 Presented at :The 3rd International Conference on Sustainable Future for Human Security,Kyoto University ; 3-5 November 2012
2. Acknowledgement Sustainable Use of Water and Resources (SUW) of Kitakyushu University to support the research Indonesian DGHE (Direktorate General of Higher Education) for the scholarship, Indonesia University of Education (UPI) where author work.
3. BACKGROUND URBAN GEOMETRY THESE PHYSICAL ASPECTSCONFIGURES OPEN SPACE AND INFLUENCE MEAN RADIANT CREATES A DISTINCT TEMPERATURE AND WIND SPEED MICROCLIMATE THAT CORRELATE WITH THREE LEVELS OF THERMAL STRESS. THIS PRESENTATION THEN, IS COMPARING TWO BUILDING GROUPS, WHICH HAVE A DIFFERENT BUILDING LAYOUT (SIZE, SHAPE AND ORIENTATION) IN THE SAME NEIGHBORHOOD TO SEEK SITE MICROCLIMATE
4. MethodMicroclimate SimulationThe difference of building form ENVI-met is used to calculate and layout, particularly the the microclimate and air quality ratio of H/W will influence in urban structure and open mean radiant temperature space A comparison of Tmrt building group reveals that time and period of the day during which extreme heat stress occurs on August 7th , 2012 to provide a better building configuration. A number of simulations are using ENVI-met BETA4, it revealed to be a good tool for the prognosis of the urban microclimate changes within urban areas, and also in the assessment of outdoor comfort through a satisfactory estimation of the mean radiant temperature
5. Study AreaA. Yahatanishiku, kitakyushu shi, fukuokabuilding group 1 and 2
6. Study Area
7. B. Site Selectionbuilding group 1 building group 2
8. Meteorology DataKitakyushu Area : The warm season lasts from oceans and seas 41% June24th to September 21th forests 33% with an average daily high shrublands 15% temperature above 26C. croplands 6%, and The hottest day of the year is built-up areas 3%. August7th, with an average high of 30C and low of 26C sunrise at 5.30am and sunset at 7.12pm, therefore this simulation conducted on August 7th between 6am 7pm (13hours)
9. Results Microclimate at street levelA. Air Temperaturebuilding group 1 building group 2
10. ResultsB. Wind Speedbuilding group 1 building group 2
11. Results C. Mean Radiant Temperaturebuilding group 1 building group 2
12. Analysis - Building Form and LayoutA1. Ta and Tmrt for as a result of building configuration (G1)Ta (air temperature) Tmrt (mean radiant temperature)
13. Analysis - Building Form and LayoutA2. Ta and Tmrt for as a result of building configuration (G2)Ta (air temperature) Tmrt (mean radiant temperature)
14. Analysis - Building Form and LayoutB. H/W Ratio for N-S and E-W orientation at 3pmN-S of G1 Tmrt x-z cut at y=60 N-S of G2 Tmrt x-z cut at y=40E-W of G1 Tmrt y-z cut at x=80 E-W of G2 Tmrt y-z cut at x=45
15. Resume of simulation Both of Ta and Tmrt for G1 are lower than G2 on open space, street and shaded area
16. Conclusion The higher building with vegetation around open space provides lower temperature, higher speed of wind, and will influence the mean radiant temperature, which could develop a better urban microclimate. North orientation is potential to reduce high temperature since its wind direction. Provide active open space such as park, playground with proper vegetation, also proved to deliver the lowest air temperature and mean radiant temperature as well.