Geothermal energy

The latest articles related to Geothermal energy

Hellisheiði Power Station – Introduction

Hellisheiði Power Station is the second largest geothermal power station in the world, and the largest in Iceland. The facility is located in Hengill, southwest Iceland, from the Nesjavellir Geothermal Power Station. As of February 2009, the plant produces of electricity, with a target capacity of of electricity and of thermal energy. Once this capacity [...]

Glenn Spencer – Energy

From 1979 to 1981 Glenn was Asst. VP for Western Energy Development for the Planning Research Corporation. He was the principal author of a study of geothermal space heating for Poplar, Montana, on the Fort Peck Indian Reservation [http://nsdl.org/resource/2200/20080812083946064T] Glenn created the concept of a geothermal-based agri-energyplex designed to produce ethanol from grain using a [...]

Geology of New Zealand – Geothermal activity

The Taupo Volcanic Zone is known for its geothermal activity. For example, Rotorua and the surrounding area have many areas with geysers, silica terraces, fumaroles, mudpools, hot springs, etc. Notable geothermal areas include Whakarewarewa, Tikitere, Waimangu, Waiotapu, Craters of the Moon and Orakei Korako. Geothermal energy is used to generate electricity at Wairakei, near Taupo. [...]

Carbon neutrality – Pledges

Being carbon neutral is increasingly seen as good corporate or state social responsibility and a growing list of corporations, cities and states are announcing dates for when they intend to become fully neutral. Companies and organizations Some corporate examples include Dell, Google, HSBC, ING Group, PepsiCo, and Tesco., Under the leadership of Secretary-General Ban Ki-moon, [...]

North Halmahera Regency – Economy

About 75% of the population of North Halmahera are dependent on agriculture, especially plantation coconut and clove. In 2004, coconut production amounted to and 66.199 thousand tonnes and cloves 3,175.5 hectares and 320.71 tonnes. Palm plantation area in 2002 amounted to with a production of 68.5 thousand tonnes. Sub Tobelo, South Tobelo and Galela are [...]

Geothermal power in New Zealand – History

Geothermal energy use in New Zealand is strongly tied to Wairakei, where the first geothermal plant was opened in 1958. At that time, it was only the second large-scale plant existing worldwide (the first being the Valle del Diavolo ‘Devil’s Valley’ plant in Larderello, Italy opened in 1911). Several new plants and efficiency-enhancing second-stage equipment [...]

Glossary of fuel cell terms – R

* – ACRONYMS Reactor : Reactor, see: bioreactor, membrane reactor and chemical reactor. Reagent : A reagent or reactant is a substance or compound consumed during a chemical reaction. Rectifier : A rectifier is an electrical device that converts alternating current (AC) to direct current (DC), a process known as rectification. Redox : Redox (shorthand [...]

Upstate California – History

Upstate California is a name for the more-rural region north of Northern California’s major urban areas. The term Northern California includes the San Francisco Bay Area and Sacramento. The region to the north of Sacramento has traditionally used the name Northstate to differentiate itself from the major metropolitan areas which are actually more centrally located [...]

Power station – Thermal power stations

In thermal power stations, mechanical power is produced by a heat engine that transforms thermal energy, often from combustion of a fuel, into rotational energy. Most thermal power stations produce steam, and these are sometimes called steam power stations. Not all thermal energy can be transformed into mechanical power, according to the second law of [...]

Wairakei – Introduction

Wairakei is the name of a power station, small settlement and a geothermal area a few kilometres north of Taupo, in the centre of the North Island of New Zealand, on the Waikato River. Adapted from the Wikipedia article Wairakei, under the G. N. U. Free Documentation License. Please also see http://en.wikipedia.org/wiki

Exergy – Exergy is highly multidisciplinary

(This section will probably be shortened and added to the “Utilization” section as a table if possible) The ”cumulative exergy consumption” of a good is a sum of the exergy decreases that occurred in order to create it. An initial state for an analysis might consist of exergy contributions from: :1) the material entering individual [...]

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