Urban Heat Island Proposal Cedar

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  • 1. PANASONIC PROJECT PROPOSAL THE STUDY OF URBAN HEAT ISLAND IN SINGAPORE WU FANG LING (3A) LUONG MONG AI NHI (3A) NGUYEN THI THAI MY (3M)
  • 2. WHAT IS URBAN HEAT ISLAND?
    • A metropolitan area which is significantly warmer than its surrounding rural areas.
    • The temperature difference usually is larger at night than during the day and larger in winter than in summer, and is most apparent when winds are weak.
    • The air in an urban heat island can be as much as 11°C higher than rural areas surrounding the city.
  • 3. URBAN HEAT ISLAND (UHI)
    • _ varies based on city’s structure
    • _ Parks, greenbelts reduce the temperature
    • _ CBD, downtown areas, residential areas are areas of warmer temperature
  • 4. Causes
    • Use of heat-absorbing materials (e.g stone, metal, concrete and asphalt) for building of roads, sidewalks, parking lots and rooftops in cities.
    • Stone-like cities only slowly loose heat at night
    • Concrete & asphalt increases runoff, which decreases the evaporation rate.
    • From vehicles, industrial activity & air conditioning.
    • Lack of vegetation and soil moisture.
    • Geometric effects: tall buildings – blocking of winds & canyon effects (surfaces for absorption of sunlight)
    • Pollution changes the radioactive properties of the atmosphere.
  • 5. Effects
    • Direct influence the health and welfare of urban residents.
    • Requires more energy for cooling purposes => increases emissions and electric consumption
    • Increases precipitation in cities and areas downwind of cities.
    • Enhances photochemical reactions, which increases the particles in the air and thus contributes to the formation of smog and clouds.
    • Culprit for global warming.
    • Affects rain pattern in summertime.
  • 6. Objectives
    • Study the effects of different roofing materials on the ambient temperature reduction.
    • Study the effects of different arrangements and types of plants on the ambient temperature reduction.
    • To reduce the ambient temperature =>reduce electricity used for cooling => save natural resources
    • To reduce emission of greenhouse gases => reduce pollution.
    • To lower reaction rates => less smog and clouds.
  • 7. Methodology
    • Find out the most reflective roofing materials from three kinds: coating, roof membranes and metal roofs based on scientific research.
    • Compare them by doing experiments:
    • Make models
    • Cover the models’ roofs with different kinds of materials
    • Use fluorescent lights like sunlight
    • Collect data twice a day. (daytime – nighttime)
    • Compare and make conclusion.
  • 8. Vegetation
    • Do research at different places in Singapore with different kinds of plants, different structures, etc…
    • What kind of plants?
    • How the plants is arranged?
  • 9. THANK YOU 