Gas versus Wind as an Energy Source - Kirsten


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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.

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Gas versus Wind as an Energy Source - Kirsten

  1. 1. Area of Study 1 SAC 1B Comparison of a fossil fuel and a non- fossil fuel energy source Kirsten
  2. 2. Greenhouse Effect vs Enhanced Greenhouse Effect
  3. 3. The Greenhouse Effect  The greenhouse effect is a natural process that warms the Earth. When the suns energy reaches the Earth some is radiated back into the atmosphere and some stays to keep the Earth warm
  4. 4. The Enhanced Greenhouse Effect  The Enhanced Greenhouse Effect is caused by human activity. The problem we now face is that human activities – particularly burning fossil fuels (coal, oil and natural gas), agriculture and land clearing – are increasing the concentrations of greenhouse gases. This is the enhanced greenhouse effect, which is contributing to warming of the Earth. The burning of natural gas.
  5. 5. The Mortlake Gas Plant The Mortlake Gas Plant is located 12km west of Mortlake. It is a 550-MW gas- fired peaking power station that generates electricity at times of high demands. It is owned Origin Energy. The Mortlake Power Plant is the largest power station of it’s type in Victoria.
  6. 6. The Macarthur Wind Farm The Macarthur Wind Farm is located between Hawkesdale and Macarthur (16 km east of Macarthur) on 10000 hectares of farming land. It is a 420-MW wind farm and is currently the largest in the southern hemisphere. It is owned by the companies AGL and Malakoff and has been in operation since January 2013. there are 20 full time jobs at the wind farm.
  7. 7. Fossil fuel vs non-fossil fuel energy source Mortlake Gas Plant  Gas is non-renewable and a fossil fuel. It is colourless, odourless and consists of mainly methane.  It is composed from decayed remnants of plants and animal matter that has been subjected to immense pressure under the earth’s crust over millions of years.  Natural Gas can be found in the Otway gas plant in Port Campbell which is where the Mortlake Gas Plant gets it supply from but is can be located in many other coastal regions.  Natural Gas has been quite abundant over the years but with the energy needs of Australia, sources will run out by 2100. Macarthur Wind Farm  Wind power is a form of solar power. It is also renewable and a non-fossil fuel.  Wind power is formed when sunlight fall unevenly on the Earth, heating the air unevenly. The warm air rises and cooler air moves in to replace it. This circulation of air from cool areas to warm areas to produce wind.  Wind power can be found in any place that is windy.  There will always be wind so therefore it is in abundance but it is unreliable due to the fact that there has to be wind to be able to produce wind energy. It is also very accessible due to being able to access wind wherever you go.
  8. 8. Extraction Mortlake Gas Plant  It is extracted by drilling wells into the ground through geographic layers, to reach the gas deposits.  The Mortlake Gas Plant takes up only 20 hectares of land but the company Origin energy bought 120 hectares in case the plant had to be expanded . Macarthur Wind Farm  Wind power is extracted from the air by the use of a turbine that has 3 or more blades that move through the air in a circular motion.  The amount of land that the Macarthur Wind farm uses in 10000 hectares but the land is of duel use so the farmers can have some wind turbines but can also run their cattle or sheep on it as well.
  9. 9. Transport Mortlake Gas Plant  Natural gas is transported from the Otway Basin to Mortlake by using a series of pipes which therefore allows the gas to flow through from one location to another.  The gas plant needs to be located near the supply of gas and also near the high voltage power lines. It needs to be near high voltage power lines so there is no waste energy excreted in transportation. Macarthur Wind Farm  Wind Power is transported by a spinning blade that drives a shaft that is connected to a mechanical device which could be a water pump or a generator.  The location of the wind farm comes into play with transport due to the fact that it needs to be placed in a location where there is plenty of wind.  The wind farm also needs to be located near high voltage power lines due to the fact that there is minimal energy wasted in the transportation of it.
  10. 10. Use Mortlake Gas Plant  Natural Gas is mainly used in homes for heating and cooking and also by industry for heat and combustion. It is also used for transportation, fertilizers and power generation.  Natural Gas produces 20% of Australia’s energy.  Natural gas has an overall efficiency of approximately 30% for electricity production and 90% for heating. Macarthur Wind Farm  Wind power is mainly used for the use of machinery and other farm operations such as pumping water and things of that nature. People can also use wind energy as a way to cut down electricity bills.  Wind Power produces 4% of Australia’s energy.  Wind energy has an overall efficiency of approximately 40% in terms of energy
  11. 11. Economic Impacts Mortlake Gas Plant  The people from the Mortlake Power Plant (Origin Energy) are the only people who are making money out of this project. Origin energy had to buy the land to build the gas plant on which was 120 hectares all together but the actual plant only takes up 20 of those hectares.  It cost $810 million to construct. Macarthur Wind Farm  Farmers get paid approximately $5000 per turbine that is on their property. They then spend that money in their local community to buy products for their farm. There are more winners in this project rather than the Natural Gas plant.  AGL also offer community assistance funds to local sporting clubs to help resurface are rebuild sporting facilities.  In the period of development and construction, the wind farm formed over 875 jobs in the district of Hawkesdale and Macarthur.
  12. 12. Social impacts Mortlake Gas Plant  Residents may be impacted by noise, air equality and emissions in the air.  There are no community benefits of Natural Gas due to the fact that Macarthur Wind Farm  The general public may complain about noise, the traffic in the construction period and also how it looks when finished.  The wind farm have grants that can be applied to help get upgrades for sporting facilities and also for school as well. This is a social impact because the community is benefiting from AGL and Malakoff
  13. 13. Environmental Impacts Mortlake Gas Plant  Natural Gas impacts the wildlife and vegetation because the gas plant takes away some of the habitat in which they live.  Mortlake was chosen as the location due to the fact that it was easily accessible for the 500 MW high voltage electricity transmission line, had good roads for traffic to commute to and from the plant and it’s close proximity to the Otway Basin where the plant gets its gas supply from. Macarthur Wind Farm  Birds and bats may be effected due to them being able to fly into them yet.  Wind Power is a very clean source of energy that can be relied on for future generations to use as their main energy source.
  14. 14. Contribution to Greenhouse Effect Natural Gas  Natural Gas is mostly made up of Methane which is a greenhouse gas.  Natural gas does contribute to the greenhouse effect due to the fact that it releases carbon dioxide which adds to the effect. It is clean burning as well which also reduces the amount of carbon dioxide in the atmosphere. Wind Power  The wind farm does not produce any greenhouse gases except for those that are produced in the periods of construction, maintenance and repair.
  15. 15. International Agreements  Kyoto – the Kyoto Protocol is an international agreement that is trying to reduce the amount of emissions of greenhouse gases in the world which finished in 2012 and was replaced by the Copenhagen Strategy.
  16. 16. National Strategies  The Carbon Tax. The government puts a limit on how much carbon companies can produce. If the company exceeds the limit of carbon, they have to pay for the amount of carbon that they have produced over the limit. The Carbon tax is suppose to be finish at the end of March beginning of April.
  17. 17. State Policies  Free public transport in Melbourne can reduce the number of people driving and using cars. This is not actually stated as a policy but in places such as Melbourne and other capitals cities within Australia, governments have tried to enforce the fact that using public transport and car pooling with reduce the amount of pollution in the atmosphere.
  18. 18. Local Strategies  Recycling or Waste production programs within the Moyne Shire. The Moyne Shire come and collect your waste from your house with a small fee attached due to the fact that they believe that it is reducing the amount of waste in our local towns.
  19. 19. References/ Bibliography Source: Where to find it: Issues of Sustainability: VCE Environmental Science Units 3 and 4 (3rd Edition) Student Text Book AGL we-source-energy/renewable- energy/macarthur-wind-farm/ Origin Energy Mortlake-Power-Station The Greenhouse Effect and the Enhanced Greenhouse Effect nhouse-effect The Moyne Shire The Carbon Tax