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Gas versus Wind as an Energy Source - Katie
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Gas versus Wind as an Energy Source - Katie


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A Year 12 student from Hawkesdale P12 College produced this slideshow as school assessed coursework for Unit 3 VCE Environmental Science.

A Year 12 student from Hawkesdale P12 College produced this slideshow as school assessed coursework for Unit 3 VCE Environmental Science.

Published in: Education, Business, Technology

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  • 1. Area of Study 1 SAC1B: A Comparison of a Fossil Fuel and a Non- Fossil Energy SourceBy Katie
  • 2. Macarthur Wind Farm Mortlake Gas Power Station vs
  • 3. About Macarthur Wind Farm  The farm is located 16 km east of Macarthur  It is the largest of its kind in the southern hemisphere  The farm is made up of 140 3MW turbines Mortlake Gas Power Station  The plant is located 12 km west of Mortlake itself  It is the largest power station of its type in Victoria  It is a 550 MW gas-fired power station
  • 4. Fossil Fuel vs Non-Fossil Energy Source Natural Gas Gas is often referred to as ‘natural gas’ as it is a naturally occurring hydrocarbon. It is colourless and also consists mainly of methane. Gas has been formed over hundreds of millions of years from the organic matter, such as different life forms. This is why it is referred to as a fossil fuel and also the reason that it will eventually run out. The organic matter was buried by sand, sediment and rock and eventually quantities of natural gas were formed. The gas was trapped underground. Through the layers, wells are drilled to reach the gas deposits. Natural gas is reliable for the terms that it only takes 6 minutes for the station to fire up. Wind Power Wind is the result of differences of pressure in the atmosphere. It can blow anywhere anytime and in any direction. The wind makes a rotor spin and as it does so, the movement of the blades spinning gives power to a generator which creates energy. A wind turbine captures the wind to produce energy. Wind is a clean energy source. It creates cost-effective and pollution free energy. A wind turbine is an unreliable energy source, it may be renewable but that doesn’t mean that power is going to be available at any time. It all depends on the weather.
  • 5. Extraction of Energy Sources Natural Gas Wells within the ground are used to extract gas. It moves along pipelines which are found within the ground. Air and gas are mixed together and are then combusted within the turbine. The force of this causes the turbines rotor to turn. The turbine is coupled to generator and as it turns the generator rotates and produces energy. Wind Power As the wind makes the rotor spin; the movement of the blades spinning gives power to a generator to produce energy.
  • 6. Transport Natural Gas The easiest and most efficient form of transport for gas is through pipelines. This system of transportation is a very complex network, designed to quickly transport natural gas from its place of origin to high areas of gas demand. Wind Power Wind cannot be transported as the energy is made on site. However, transportation of parts (such as the blades from Denmark and the towers from Portland) needs to be conducted. Usually transported by truck. The electrical energy that is produced by both gas and wind turbines is transported in high voltage electrical lines and also contributes to power in the national grid!
  • 7. Energy UsesNatural Gas Natural gas is mainly used for Australia’s peak load electricity demand. It used mainly as a heating fuel. In homes, 60% is used for space heating, more than 30% for water heating and less than 10% for cooking. Within the business world, 90% is used for space heating along with 10% for water heating. Industries such as the chemical, rubber, plastic, metal and vehicle . Wind Power Wind energy is also used in Australia’s electricity supply. A single small win turbine can generate enough electricity for a single home and a line a many larger turbines can generate electricity for the grid.
  • 8. How Gas is used to Generate Electricity
  • 9. How Wind is used to Generate Electricity
  • 10. Economic Impacts Natural Gas  At the Mortlake Gas Power Station, Origin Energy are the only ones who are making any profit.  During construction process of Mortlake Gas Power Station people were employed meaning that they were earning an income and also making some profit  There are only eight permanent employees at the Mortlake Gas Power Station  The station cost $810 million to construction Wind Power  Each individual that has turbines on their farm, are paid $12,000 yearly per turbine  A community fund has been established to reinvest revenue earned from the wind farm back into the community  The cost of the wind farm is approximately $1 billion
  • 11. Social Impacts Natural Gas  During the construction of the plant the roads were hit by heavy traffic  Pollution and green house gases that are emitted into the atmosphere when the station is in power  Complaints from community members about the amount of waste that the power station creates Wind Power  During the construction of the turbines there were gases emitted into the atmosphere  Complaints are made by community members regarding the noise made by turbines when spinning  Amount of people wanting to move into locations close to the turbines have the possibility of decreasing because they don’t want to live close to them
  • 12. Environmental Impacts Natural Gas  Origin owns 100 hectares, yet the power station is only placed on 20 of it. The rest of the land is mowed regularly and sold into the community  The native vegetation and wild loses habitat and environment  Greenhouse gases are emitted into the atmosphere which contribute to the greenhouse effect Wind Power  The wind farm is located over three different farms coming to a total land usage of 5,500 hectares  Native vegetation still has the opportunity to grow  Farms are still able to be in use whereas the gas plant does not allow this  Birds and bats have been known to be killed by the spinning turbines  Emissions were let into the atmosphere during construction
  • 13. The Greenhouse Effect The greenhouse effect is indeed a natural process. It warms the earths surface. Some of it is reflected back into space and the rest is absorbed and reradiated by greenhouse gases. This absorbed energy warms the atmosphere as well as the earths surface, maintaining earths temperature and allowing life on earth to actually exist.
  • 14. Contribution to Greenhouse Effect Natural Gas Natural gas produces many more greenhouse gases when comparing to the wind farm. The combustion of methane releases energy, and forms carbon dioxide and water. CH4, CO2 and water vapours are all types of the various greenhouse gases. Wind Power Greenhouse gases were emitted into the atmosphere during construction however it has been predicted that these have been paid back just within the first six months of the turbines spinning. Greenhouse Gas Emissions by Country
  • 15. The Enhanced Greenhouse Effect It is a problem we now face thanks to our human activity. Things such as burning fossil fuels, land clearing and agriculture are all things which are increasing the concentration of greenhouse gases. This is called the enhanced greenhouse effect, and is leading to the concern of global warming.
  • 16. International Agreements On the international level of things, meetings have been called for decisions to be made regarding the reduction of emissions by greenhouse gases. In 1988, the first conference that considered the reduction of greenhouse gases to reduce global warming was held. Yet the target was never adopted. There are conferences every few years after the meeting in Kyoto, Japan in 1997 where the protocol was agreed to. It aimed to establish legally binding targets for developed countries o collectively reduce their greenhouse gas emissions by 5% below the 1990 levels by 2008/2012. These are now review in a series of meetings.
  • 17. National Strategies Australia began addressing the enhanced greenhouse effect and its consequences through the 1992 National Greenhouse Response Strategy. This was replaced by the 1996 Nation Greenhouse Strategy where a number of different programs were launched, such as the Greenhouse Challenger Plus. Australia’s National Greenhouse Gas Inventory, 2010
  • 18. State Policies It was in 2002 that the Victorian Greenhouse Strategy was released. It outlined a number of ways to reduce greenhouse gas emissions in this state. Such as; increasing end-use energy efficiency, increasing the use of renewable energy resources for the supply of electricity and transport fuels, exploring opportunities for carbon capture and storage, investigating further opportunities for large-scale clean energy-efficient street lighting.
  • 19. Local Strategies Many of the Australian local governments (e.g. Moyne Shire) have committed to reducing their generation of green house gas emissions. They take part in the Cities for Climate Protection program. The CCP program helps councils to achieve five milestones; establish a detailed base year inventory of greenhouse gas emission and forecast emission growth, work with local community to establish an emissions reduction goal, develop and adopt a comprehensive local action plan, implement the action plan, monitor and report on the greenhouse gas emissions and the implementation of actions and measures to reduce emissions. Simple agreements such as investing in solar panelling for street lights
  • 20. References/Bibliography  forecast/8005-what-is-wind-how-wind-is-formed  Issues of sustainability VCE Environmental Science Units 3 and 4, 3rd Edition   images- gallery?typeFilter=Image&categoryFilter=MW&sortOrder=DESC&p g=3  gas