Rotokawa Power Station
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Rotokawa Power Station
The Rotokawa Power Station is a geothermal power station owned and operated by Mercury Energy. It is located approximately 10 km north east of Taupo in New Zealand. The station uses a binary cycle manufactured by Ormat Industries. In May 2008, work began on the nearby Nga Awa Purua Power Station. Environmental aspects Due to the high temperatures associated with the geothermal vent here, this locale is an occurrence of extremophile micro-organisms that can thrive on the high vent water temperature.C.Michael Hogan. 2010''Extremophile'' eds. E.Monosson and C.Cleveland. Encyclopedia of Earth. National Council for Science and the Environment, Washington DC See also *Geothermal power in New Zealand *List of power stations in New Zealand This is a list of power stations in New Zealand. The list is not exhaustive – only power stations over 0.5 MW and significant power stations below 0.5 MW are listed. Power plants in New Zealand have different genera ...
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Waikato
Waikato () is a local government region of the upper North Island of New Zealand. It covers the Waikato District, Waipa District, Matamata-Piako District, South Waikato District and Hamilton City, as well as Hauraki, Coromandel Peninsula, the northern King Country, much of the Taupō District, and parts of Rotorua District. It is governed by the Waikato Regional Council. The region stretches from Coromandel Peninsula in the north, to the north-eastern slopes of Mount Ruapehu in the south, and spans the North Island from the west coast, through the Waikato and Hauraki to Coromandel Peninsula on the east coast. Broadly, the extent of the region is the Waikato River catchment. Other major catchments are those of the Waihou, Piako, Awakino and Mokau rivers. The region is bounded by Auckland on the north, Bay of Plenty on the east, Hawke's Bay on the south-east, and Manawatū-Whanganui and Taranaki on the south. Waikato Region is the fourth largest region in the country in ar ...
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Mercury Energy
Mercury NZ Limited is a New Zealand electricity generation and multi-product utility retailer of electricity, gas, broadband and mobile telephone services. All the company's electricity generation is renewable. In August 2021, Mercury acquired five operating wind farms and several wind farm development options from Tilt Renewables. At the same time, the first power from the newly built wind farm at Turitea was generated – adding to the existing portfolio of nine hydro stations on the Waikato River and five geothermal plants located in the central North Island. In the year ended June 2021, Mercury had generated 3,611GWh of electricity through hydro generation and 2,594GWh through geothermal generation. In May 2022, Mercury acquired the retail business of Trustpower, including the retail customer base and Trustpower brand. The generation business of Trustpower changed its name to Manawa Energy Limited. In June 2022, Mercury launched fibre broadband as a retail product t ...
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Geothermal Power
Geothermal power is electrical power generated from geothermal energy. Technologies in use include dry steam power stations, flash steam power stations and binary cycle power stations. Geothermal electricity generation is currently used in 26 countries,Geothermal Energy AssociationGeothermal Energy: International Market Update May 2010, p. 4-6. while geothermal heating is in use in 70 countries. As of 2019, worldwide geothermal power capacity amounts to 15.4 gigawatts (GW), of which 23.9 percent or 3.68 GW are installed in the United States. International markets grew at an average annual rate of 5 percent over the three years to 2015, and global geothermal power capacity is expected to reach 14.5–17.6 GW by 2020. Based on current geologic knowledge and technology the Geothermal Energy Association (GEA) publicly discloses, the GEA estimates that only 6.9 percent of total global potential has been tapped so far, while the IPCC reported geothermal power potential to b ...
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New Zealand
New Zealand ( mi, Aotearoa ) is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and over 700 List of islands of New Zealand, smaller islands. It is the List of island countries, sixth-largest island country by area, covering . New Zealand is about east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The country's varied topography and sharp mountain peaks, including the Southern Alps, owe much to tectonic uplift and volcanic eruptions. New Zealand's Capital of New Zealand, capital city is Wellington, and its most populous city is Auckland. The islands of New Zealand were the last large habitable land to be settled by humans. Between about 1280 and 1350, Polynesians began to settle in the islands and then developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. ...
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Binary Cycle
A binary cycle is a method for generating electrical power from geothermal resources and employs two separate fluid cycles, hence binary cycle. The primary cycle extracts the geothermal energy from the reservoir, and secondary cycle converts the heat into work to drive the generator and generate electricity. Binary cycles permit electricity generation even from low temperature geothermal resources (<180°C) that would otherwise produce insufficient quantities of steam to make flash power plants economically viable. However, due to the lower temperatures binary cycles have low overall efficiencies of about 10-13%.


Introduction


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Ormat Industries
Ormat Technologies, Inc. is an international company based in Reno, Nevada, United States. Ormat supplies Alternative energy, alternative and Geothermal energy, renewable geothermal energy technology. The company has built over 190 power plants and installed over 3,200 MW. As of January 2021 it owns and operates 933 MW of Geothermal power, geothermal and Energy recovery, recovered energy based power plants. Ormat has supplied over 1000 turbochargers worldwide: North America, South America, Europe, Australia, and Asia. The company's products also include turbines, generators, and heat exchangers. The company's share is a dual stock traded on the Tel Aviv Stock Exchange since 1991 and on the New York Stock Exchange since 2004 under the symbol ORA, and is part of the Tel Aviv 35 Index and the Tel Aviv Tech-Elite Index [3]. The company's main production facilities are located in Yavne, Israel. History Ormat was established in 1965 as Ormat Turbines Ltd. (later renamed Ormat Indust ...
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Nga Awa Purua Power Station
Nga Awa Purua, also known as Rotokawa II, is a geothermal power station located near Taupo in New Zealand. The project was developed by Mighty River Power (now Mercury Energy). Nga Awa Purua is New Zealand's second largest geothermal power station and the steam turbine is the largest geothermal turbine in the world. The power station is a joint venture between Mercury Energy (75%) and the Tauhara North No 2 Trust (25%), who represent about 800 owners affiliated to Ngati Tahu. The $430 million project first generated electricity on 18 January 2010, and was officially opened by Prime Minister John Key on 15 May 2010. The Rotokawa Power Station is situated close by. See also * List of power stations in New Zealand References Geothermal power stations in New Zealand Buildings and structures in the Taupo District Ngāti Tahu {{Powerstation-stub ...
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Extremophile
An extremophile (from Latin ' meaning "extreme" and Greek ' () meaning "love") is an organism that is able to live (or in some cases thrive) in extreme environments, i.e. environments that make survival challenging such as due to extreme temperature, radiation, salinity, or pH level. These organisms are ecologically dominant in the evolutionary history of the planet. Some spores and cocooned bacteria samples have been dormant for more than 40 million years, extremophiles have continued to thrive in the most extreme conditions, making them one of the most abundant lifeforms. Characteristics In the 1980s and 1990s, biologists found that microbial life has great flexibility for surviving in extreme environments—niches that are acidic, extraordinarily hot or within irregular air pressure for example—that would be completely inhospitable to complex organisms. Some scientists even concluded that life may have begun on Earth in hydrothermal vents far under the ocean's su ...
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Geothermal Power In New Zealand
Geothermal power in New Zealand is a small but significant part of the energy generation capacity of the country, providing approximately 17% of the country's electricityElectricity in New Zealand 2018
(from the New Zealand Electricity Authority. Accessed 2019-17-06.)
with installed capacity of over 900 MW.Geothermal Energy and Electricity Generation
(from the New Zealand Energy Efficiency and Conservation Authority website. Accessed 2019-17-06.)
New Zealand, like only a small number of other countries ...
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List Of Power Stations In New Zealand
This is a list of power stations in New Zealand. The list is not exhaustive – only power stations over 0.5 MW and significant power stations below 0.5 MW are listed. Power plants in New Zealand have different generating roles – for baseload, intermediate or peaking. Baseload generators are those that run continuously (except for maintenance), and include all geothermal and run-of-the-river hydroelectric plants, which must 'use it or lose it'. Intermediate generators are load-following power plants. Peaking power plants generate only for minutes or hours at a time, during the sharpest peaks in electricity demand. Bioenergy Geothermal Hydroelectric Source: Decommissioned hydroelectric Heritage hydroelectric Fossil-fuel thermal Source: Wind Sources: Solar Grid battery storage Proposed power stations Source: See also * Energy in New Zealand * Electricity sector in New Zealand *List of New Zealand spans * New Zealand electricity ma ...
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