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Wind Energy

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by

Zack Knight

on 17 November 2013

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Transcript of Wind Energy

Presentors:
Key Terms:
For:
Wind Energy
Ms. Lye
Wind Farms-
An area with many wind turbines grouped together (done for economic reasons and for easy access)
Person- years-
A unit of measurement based on an ideal amount of work done by one person in a year
MW-
Mega Watts, term used to measure amount of power
Physics (SPH 3U0)
Wind Energy Capacity-
Max amount of energy that can be produced from all wind turbines
Wind energy is renewable
Fuel abundant all over world
Wind turbines are quiet
Do not impact wildlife
Wind farms supply additional income to farmers
Wind is present everywhere around the world
Wind turbines are less likely to be struck by a bird than a building or car is

How a Turbine Works
Wind passes over blades
Pressure difference between surfaces causes the rotor to turn
Blades of turbine turn and create kinetic energy, which is converted to mechanical energy
This is transmitted through a drive shaft to a generator
Blades begin to turn when wind reaches a speed of 13 km/h
They shutdown when the speed of the wind is 90 km/h (too fast)
Wind Farms
Modern turbines use the same concept as a simple windmill but on a larger scale
“Wind Farms” are groups of turbines that produce electricity for thousands of homes
Basic technology is used; energy of wind turns windmill blades which then rotate a generator to produce electricity
Largest farm in world is in Texas, consists of 421 turbines producing 735 MW of electricity, the turbines cover nearly 47,000 acres of land
Wind farms in Canada have a capacity of 7,051 MW
Large wind turbines can be built offshore, over lakes, over the ocean, and on land


Environment
Wind energy uses very minimal amounts of water to produce energy
Using wind energy over other forms of energy production will reduce water consumption (preserves clean water)
A 150 MW wind farm uses 480 million litres less water in a year than natural gas facilities (480 million litres is equivalent to 160 Olympic sized swimming pools)
Wind power creates no greenhouse gases or air pollution
Source of energy that does not destroy environment around it


Abdullah Soltan
Zack Knight
Benefits
CanWEA-
Canadian Wind Energy Association, one of the leading companies in wind energy developement
Pricing

Environmental Impact
Wind Energy
Challenges
Have visual Impact
Require regular maintenance
Constant and strong wind needed
Power output is not constant
Bats/birds can be affected or hit by the wind turbines
Wind farms are sometimes in areas where winds may be blocked by mountains or other features of the Earth
Wildlife
Wind energy is emission free and does not contribute to climate change
It's largest impact is on birds and bats
Project developers have put mechanisms in place to reduce the risk of birds being hurt
Wind energy is one of the only industries that studies affects on wildlife
Studies show that wind turbines are a minor source for bird deaths when compared to other human impacts
Affordable source of new electricity
Wind that fuels a turbine is free
Protection for consumers, stable electricity rates and long term cost certainty
Energy costs more than current generating plants built 20 years ago
Competitive with coal, hydro, and nuclear power (based on health costs and environmental impacts)
Once a wind farm is built, the price of electricity remains the same since the resources don’t run out
Price of production of wind energy is decreasing as it becomes more common
Natural gas prices vary and change over time with supply and demand
In Ontario, the cost rate is 11.5 cents per kWh, however nuclear energy’s rate is 25-28 cents per kWh

Canada Wind Energy Stats:
• Currently installed capacity: 7,051 MW
• Wind Farms: 171
• Wind turbines: 4,010
• Turbines produce up to: 4.5 MW
• % of electricity demand met by wind power: 3%
• # of Canadian homes powered by wind: over 2 million


Nuclear, Coal, Hydro
Affects on Health
Wind turbines don’t harm the health of humans
Wind energy decreases harmful air emissions, and creates harmless waste products compared to other sources of energy
Major source for emission reductions
Doesn’t create radioactive waste products
Safe, healthy and renewable source of energy
Doesn’t create air pollution
Doesn’t require large amounts of fresh water (healthier environment for people and animals)
No greenhouse gases are emitted
Ontario’s Chief Medical Officer of Health: wind turbines do not affect the health of humans when they are appropriately placed, a minimum of a 550-metres away from houses.



Energy and Society: STSE Research Seminar Presentation


Url's
Video:
• http://youtube.com.watch?v=RGcGzqeq-Ac

Pictures:

• http://www.canwea.ca/windvision_e.php
• http://www.canwea.ca/farms/index_e.php
• http://annapolisvalleynews.com/south-canoe-wind-farm-proposal-gaining-momentum/
• http://www.spectator.co.uk/features/8807761/wind-farms-vs-wildlife/
• http://en.wikipedia.org/wiki/File:Wb_deichh_drei_kuhs.jpg
• http://twnwindpower.com/2013/01/everything-you-need-to-know-about-turbines/
• http://windfacts.ca/environment-wildlife
• http://www.sustainable.co.za/blog/2013/08/urban-turbines-wind-power-for-domestic-use/
Reference List
Affordable Power. (n.d.). Wind Facts. Retrieved November 8, 2013, from http:// windfacts.ca/affordable-power

Energy Source: Wind Energy. (n.d.). Renewable Energy & Efficiency. Retrieved November 8, 2013, from http://www.pembina.org/re/sources/wind

Environment & Wildlife. (n.d.). Wind Facts. Retrieved November 10, 2013, from http://windfacts.ca/environment-wildlife

Gibilisco, S. (2007). Alternative energy demystified. New York: The McGraw-Hill Companies.

Wind by the numbers: economic benefits of wind energy. (n.d.). Wind Facts. Retrieved November 10, 2013, from http://www.canwea.ca/pdf/canwea-factsheet-economic-web-final.pdf

Wind Energy. (2013, October 30). Gale Cengage Learning. Retrived November 10, 2013, from Science in Context database.

Wind Farms. (n.d.). canwea. Retrieved November 10, 2013, from http://www.canwea.ca/farms/index_e.php

Wind power seen generating up to 18% of global power by 2050. (2013, October 21). http://www.iea.org/newsroomandevents/news/2013/october/windpowerseengeneratingupto18ofglobalpowerby2050.html

Your Health. (n.d.). Wind Facts. Retrieved November 8, 2013, from http://windfacts.ca/your-health

THE END
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