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Australia’s Solar Tower
Over the past few decades, scientists have been looking hard for new sources of energy. Most of the world’s electricity is produced by burning fossil fuels such as coal and oil. However, not only are these fuels limited, but they also damage the environment. Probably the most promising alternative form of energy is solar power, in which the heat of the sun is used to make electricity. Now, the Australian government has approved plans to build the world’s largest solar power plant.
The plant has a surprisingly simple design. It consists of a low building with a huge glass roof 7 kilometers in diameter. In the middle of this roof stands a 1-kilometer-tall tower. The air under the roof is heated by the sun’s rays until it becomes about 300C hotter than the air at the top of the tower. Since hot air naturally rises, the heated air rushes up the tower, creating a powerful wind. This wind turns huge turbines set inside the tower, generating enough electricity to meet the needs of a small city.
This is not the first time that a solar power plant like this has been built. A similar plant was built in Spain in 1982. Though that plant was much smaller, it proved that the design was an effective way to produce clean energy. Why, then, has it taken so long for another plant to be built? One reason is that burning coal and oil is still a much cheaper way to produce electricity. Another is that many people have only recently become conscious of how much damage traditional power plants are doing to the environment.
The Australian government believes that the solar tower will bring other benefits apart from clean energy. It will be by far the highest structure in the world, reaching twice the height of the world’s current tallest building, the Taipei 101 in Taipei, Taiwan. This should make the plant an important tourist attraction, bringing jobs to the area where it is built. Still, the biggest advantage of the new plant will be its lack of damage to the environment. If it is a success; it is sure to be imitated around the world.
Australia’s Solar Tower
Over the past few decades, scientists have been looking hard for new sources of energy. Most of the world’s electricity is produced by burning fossil fuels such as coal and oil. However, not only are these fuels limited, but they also damage the environment. Probably the most promising alternative form of energy is solar power, in which the heat of the sun is used to make electricity. Now, the Australian government has approved plans to build the world’s largest solar power plant.
The plant has a surprisingly simple design. It consists of a low building with a huge glass roof 7 kilometers in diameter. In the middle of this roof stands a 1-kilometer-tall tower. The air under the roof is heated by the sun’s rays until it becomes about 300C hotter than the air at the top of the tower. Since hot air naturally rises, the heated air rushes up the tower, creating a powerful wind. This wind turns huge turbines set inside the tower, generating enough electricity to meet the needs of a small city.
This is not the first time that a solar power plant like this has been built. A similar plant was built in Spain in 1982. Though that plant was much smaller, it proved that the design was an effective way to produce clean energy. Why, then, has it taken so long for another plant to be built? One reason is that burning coal and oil is still a much cheaper way to produce electricity. Another is that many people have only recently become conscious of how much damage traditional power plants are doing to the environment.
The Australian government believes that the solar tower will bring other benefits apart from clean energy. It will be by far the highest structure in the world, reaching twice the height of the world’s current tallest building, the Taipei 101 in Taipei, Taiwan. This should make the plant an important tourist attraction, bringing jobs to the area where it is built. Still, the biggest advantage of the new plant will be its lack of damage to the environment. If it is a success; it is sure to be imitated around the world.
