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Transcript of Wind
What causes wind?
WIND is caused by Differential heating of the Earth's surface by the radiation from the sun
Ming jun chai
ki yip lee
alyssa rachel kong
ee lynne ong
Wind turbines convert the wind kinetic energy to electrical energy by rotating the blades
major locations to install wind turbines:
The wind energy deployment pace within the UK has been accelerating through 2010, reaching over 5 GW capacity
Global annual installed wind capacity 1997 - 2014
Theory of Operation of Wind Turbines
How it works?
Daily Wind Cycle
Global Wind Patterns!
Wind energy turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity
types of modern wind turbines
Horizontal-axis Wind Turbine (HAWT)
Vertical-axis Wind Turbine (VAWT)
Number of Blades
Most Compromised Design
Not much air disturbances
Reasonable amount of energy
Growth of Size in Blade:
1985 20 metres
1995 50 metres
2005 126 metres
of wind energy
Wind is actually a form of solar energy!!
infinite resource (can never be depleted)
Therefore, it is one of the
new energy sources.
Source: EIA, 2011
Total Energy consumption
no greenhouse gases emissions
reduce reliance on fossil fuels
surplus of reliable clean energy
long term sustainable financially
air moving over the surface of the blade
~ up to 50-60 decibels
noise problem for local people
intermittency of Wind turbine
run less reliably when demand/supply mismatch
only suitable at certain locations
High Installation Cost
High material cost (carbon fibre)
High Transportation cost to remote area/offshore
difficult to set up
is the impact of bird deaths caused by wind turbine huge?
The answer is...
How about grid integration
case study: uk offshore wind farms
do you know uk has the
london array 1
located in thames estuary
Number of Turbines:
Cost of Construction:
£ 1.9 Billion
Power Output: 2,200,000 MWh per year
Enough to power
the distance from the shore
unpredictable sea conditions
Blades Swept area:
1.5 times size of Wembley stadium's pitch
Payback time: 10 Years
THANK YOU !
Is it successful?
More offshore wind farms will follow ...
largest installed offshore wind capacity
for the last few years?