1106 WindSim UM KIER Hyun-Goo2

8/16/2019 1106 WindSim UM KIER Hyun-Goo2

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Singapore

Land area: 710.3 sq km (Seoul 606, Kobe 552) Total population: 4.988 million (Seoul 10.5, Kobe 1.5)

Population density: 7022 per sq km (Seoul 17327, Kobe 2717) 23% of land area covered with forest and nature reserves

Top 1 busiest port in the world (Busan 5, FY2007) Major industries: Shipping, banking, tourism, electrical & electronics,

chemicals and oil refining


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Wind Characteristics

Low wind speed for most neighboring countries

South-eastern side consists mainly of water bodies


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Identify suitable sites with higher wind energyconcentration for installation of wind turbine

Serve a purpose of indicating candidate sites wheremore measurements could be carried out

Low-speed wind turbine or BIWT

Biological and chemical defense

Urban planning works Wind Engineering Application

Why a Singapore Wind Map?


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About the Project

Highly urbanized city with 56931 buildings

Almost impossible to do a CFD simulation on eachand every single buildings


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z

d

Urban Canopy

zo

o z

d z u z U ln)( *


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Effect of Urban Canopy

Packing density may affect the value of d and Identify 2 areas with similar mean building height

but different packing density

Identify a relationship between packing density,

mean building height and d,


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Urban Canopy Models


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Sectors divided based on building density and land use

104 sectors were identified but reduced to 47 sectorszo d

A p, A f H


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Changi 3TIER

Climatology


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Wind Resource Map

Fine resolution of 90m by 90m (SRTM)

Simulated 3D wind field covering Singapore

Able to extract wind speed at any height you want(transfer climatology)


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Wind resource was very poor as expected

Nevertheless, wind map is valuable information Transferred climatology offers wind design data

Wind environments around the Singapore Flyer etc.

Urban canopy model is to be more developed Validation of MacDonald eqns. with real urban layouts

Consideration of forest model but tuning is required

Conclusion & Future Plans


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Wind Environmental Impact


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Validation of MacDonald Eqn.


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Wind Flow over a Urban Sector

Wind flow simulation

for wind direction of NW


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Areal-Averaged Wind Profile

1

10

100

1000

0 1 2 3 4 5 6

H e i g h t a b o v e

g r o u n d , l n

( z )

Areal-averaged wind speed (m/s)

― CFD fitting ― Empirical Eqn.

Areal-averaging of wind speed

at 50m a.g.l.


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THANK YOU

Email: [email protected]

Contact number: +65 92975450 (Singapore)

Documents

1106 WindSim UM KIER Hyun-Goo2