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Brainstorm examples hydro, solar, wind, nuclear, wave, chemical Chemical reaction lighting bulb same as a battery
What is NZ generation like – mostly hydro, no nuclear H/O NZ and its power generation H/O task 6 Kids research pros and cons of one method of generation, create powerpoint/ poster, present to class 5 mins All vote on best for NZ and why
Water rushes through to the Clutha River from Clyde Dam in Central Otago on the South Island of New Zealand. The largest hydroelectric dam in New Zealand is the Clyde Dam which was built along the Clutha River near the town of Clyde and generates a capacity of 400 megawatts. There are a million cubic meters of concrete in the dam with a further 200,000 in the powerhouse. The Clyde Dam stands at 100 meters in height, 70 meters wide at the base The Waikato River system is the most highly developed for electricity generation in New Zealand. It supplies eight hydro-electric stations and provides cooling water for two geothermal and one thermal station. The eleven stations on the Waikato produce 65% of the North Island's power generation and approximately 25% of New Zealand's hydro power. This is 15% of New Zealand's total power.
The first geothermal power station was built at Landrello, in Italy, and the second was at Wairekei in New Zealand. The centre of the Earth is around 6000 degrees Celsius - hot enough to melt rock. Even a few kilometres down, the temperature can be over 250 degrees Celsius. In general, the temperature rises one degree Celsius for every 36 metres you go down. In volcanic areas, molten rock can be very close to the surface. Hot rocks underground heat water to produce steam. We drill holes down to the hot region, steam comes up, is purified and used to drive turbines, which drive electric generators.
Water piped through thin pipe gets heated and stored in insulated tank Photo cells turn solar energy into electrical not very efficient at the moment Furnace is an array of mirrors which concentrates suns rays to heat water into steam and turn turbine - possibly arranged as a tower full of turbines surrounded by greenhouse Demo solar cell lighting bulb/ whistle