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Wind

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by

Ki Yip Lee

on 19 March 2015

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Transcript of Wind

Wind Energy,
The Future?

What causes wind?
WIND is caused by Differential heating of the Earth's surface by the radiation from the sun
By :
Ming jun chai
Ivan Liew
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
Aerodynamic lift
types of modern wind turbines
Horizontal-axis Wind Turbine (HAWT)
Vertical-axis Wind Turbine (VAWT)
Single-bladed design
two-bladed design
Number of Blades
Three-bladed design
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
2015
178 metres

Advantages
Disadvantages
AND
of wind energy
Renewable
Wind is actually a form of solar energy!!
How????
infinite resource (can never be depleted)

widely-distributed

Therefore, it is one of the
most promising
new energy sources.
Source: EIA, 2011
Total Energy consumption
Clean
no greenhouse gases emissions

environmental-friendly

reduce reliance on fossil fuels
Cost Effective
surplus of reliable clean energy

long term sustainable financially
Noise Pollution
air moving over the surface of the blade

~ up to 50-60 decibels

noise problem for local people
Wind Reliability
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
however
is the impact of bird deaths caused by wind turbine huge?
myth:
The answer is...


NO
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:

175
Foundation:
Monopile
Cost of Construction:
£ 1.9 Billion
Power Output: 2,200,000 MWh per year
Enough to power
Challenges

the distance from the shore

high winds

unpredictable sea conditions
turbine's hub:
87m
Blades Swept area:
11,300 m
2
1.5 times size of Wembley stadium's pitch
Fibreglass-reinforced epoxy
Payback time: 10 Years
THANK YOU !
Is it successful?
YES!!!
More offshore wind farms will follow ...
US
Europe
china
largest installed offshore wind capacity
for the last few years?
500,000
households !!!
Full transcript