geothermal association Articles

  • H2S Emissions Control at Geothermal Plants

    The LO-CAT® II process is used to control H2S emissions and reduce odors at geothermal power plants. Geothermal steam, considered to be a clean and environmentally friendly source of energy, is produced when water seeps into high temperature, high pressure formations below the earth's surface. The steam is brought to the surface through production wells and then expanded through a turbine to ...


    By Merichem Company

  • Talking Point: Geothermal systems and the value of maintenance programmes

    Mike Deed, Managing Director of Geoquip Water Solutions, is the author of Talking Point in the October issue of Groundwater Engineering. He focuses on the huge benefits of installing a geothermal system and the importance ...


    By Geoquip Water Solutions

  • Lessons from Indonesia: Mobilizing Investment in Geothermal Energy

    Developing countries will need about $531 billion of additional investments in clean energy technologies every year in order to limit global temperature rise to 2°C above pre-industrial levels, thus preventing climate change’s worst impacts. To attract investments on the scale required, developing country governments, with ...

  • Geothermal Heat Pump (GHP) - Case Studies

    Case Study: “GHP schools used approximately 26% less source energy per square foot of floor area,” according to an evaluation of Lincoln, Nebraska schools by the Department of Energy. The report concludes that the schools using GHP technology “outperform others in the school district.” Case Study: Annual electrical consumption in Fort Polk ...

  • Case Study - 2.0 MW Nominal Geothermal Power Plant

    Lake Naivasha, Kenya – 2007 Under a contract signed in June 2006 with Oserian, Geothermal Development Associates (GDA) agreed to design, manufacture, inspect, test, pack, and ship a 2 MW nominal geothermal steam turbine generator and related power plant auxiliary components from Reno, Nevada, USA to the Oserian flower-growing facility near Lake Naivasha, Kenya. GDA will provide technical ...

  • Exergy analysis and performance evaluation of Kizildere Geothermal Power Plant, Turkey

    Conventional geothermal power plants (GPP) differ from fossil-fuel power plants (FFPP) in many ways. The most specific ones are that GPPs are not cyclic plants and the working fluid is not pure steam. Geothermal steam contains non-condensable gases (NCG) which degrade power plant efficiency. This discrepancy leads to two considerations in energy and exergy analysis of GPPs. One is that the amount ...


    By Inderscience Publishers

  • Case Study - 2.4 MW Geothermal Wellhead Power Plant

    Eburru, Kenya – 2012 Under a contract with Kenya Electricity Generating Company (KenGen), GDA designed, manufactured, tested, and shipped all of the major equipment for a 2.4 MW wellhead power plant at Eburru, Kenya. GDA also provided supervision and technical support during installation and commissioning of the plant. At the heart of the plant is an Elliott 8-stage GYR turbine. This ...

  • Case Study - Aluto Langano Power Plant Rehabilitation

    Aluto Langano, Ethiopia – 2007 The Aluto Langano Geothermal Pilot Plant (ALGPP) is located on the Aluto volcanic complex of the Ethiopian Rift valley, close to the eastern escarpment between Lake Langano and Lake Ziway, some 200 km southeast of Addis Ababa. The Aluto volcanic complex is a young acidic system consisting of domes, lava, and pyroclastic interbeds. The geothermal field was ...

  • Case Study - 6MW Non-Condensing Power Plant

    Lihir Island, Papua New Guinea – 2003 First Geothermal Power Station in PNG: Press Release, April 16, 2003 Lihir Gold Limited “Gold company Lihir Gold Limited is turning its vast geothermal resource into an opportunity. In April, the company started commissioning a 6MW geothermal power station, the first in Papua New Guinea to use natural geothermal ...

  • A Cleaner Energy Future

    As renewable energy plays an increasingly important role in the world’s energy portfolio, the standards of ASTM International Committee E44 are helping to pave the way for innovation in clean energy sources. A growing population and improving living standards around the world are causing significant increases in energy demand and competition for fossil fuels. These escalating energy ...


    By ASTM International

  • Case Study - 30MW Single Flash Power Plant and 20 MW Expansion

    Lihir Island, Papua New Guinea – 2005 In December 2003, Lihir Management Company awarded GDA a contract for supply and site supervision for a 30MW (net) geothermal power plant. In 2005, Lihir contracted with GDA for an additional 20 MW of plant equipment. The picture at the right shows the main power house and annex under construction. The power house is the larger open section which ...

  • White paper on Willowstick technology used for mapping and modeling groundwater systems

    1.0 Introduction Willowstick Technology (the “Technology”) delineates and characterizes subsurface aqueous systems in complex hydrogeologic settings. It has consistently proven valuable in: 1) the diagnosis of seepage through earthen dams and levees; 2) characterizing groundwater infiltration into surface and subsurface mines; 3) tracking pollution plumes influenced by ...


    By Willowstick Technologies LLC

  • Case Study - 28 MW Dual-Flash Power Plant

    Brady Hot Springs, Nevada, USA – 1992 GDA was a partial owner in this successful project and was responsible for exploration and development of the resource. As Manager of Wellfield Development, GDA recommended the comprehensive wellfield development plan, formulated the exploration program, supervised surface geological mapping and geophysical surveys for siting production and injection ...

  • Uncoupling CR(VI) Reduction in Mixed-Culture Biofilm Systems: Electron-Flow Pathway Analysis

    ABSTRACTThe electron transport pathway for microbial Cr(VI) reduction was investigated using specific inhibitors of the trans-membrane enzymes in a culture of Escherichia coli ATCC 33456 grown in a coculture with the phenol degrader, Pseudomonas putida DMP-1. The analysis involved blocking the electron flow pathway through the inner cell membrane at specific enzyme locations using known metabolic ...

  • Federal energy stimulus: The check is in the mail

    Energy efficiency companies waiting for federal stimulus money probably feel like they are being told, “The check is in the mail.” It is supposed to arrive, but when?The federal government will channel a large pot of the money through state agencies, so it is wise to keep an eye on announcements by governors and state energy offices. States must apply by May 12 for $3.1 billion in what is known ...

  • Strengthening ownership and effectiveness of climate finance

    The Climate Investment Funds (CIFs), one of the world’s largest dedicated funding facilities for climate change mitigation/adaptation projects, have now been in operation for five years. It’s a good time to step back and evaluate what lessons we’re ...

  • Getting the Market to Tell the Truth

    Moving the global economy off its current decline-and-collapse path depends on reaching four goals: stabilizing climate, stabilizing population, eradicating poverty, and restoring the economy’s natural support systems. These goals--comprising what the Earth Policy Institute calls “Plan B” to save civilization--are mutually dependent. All are essential to feeding the ...


    By Earth Policy Institute

  • Governments Spend $1.4 Billion Per Day to Destabilize Climate

    We distort reality when we omit the health and environmental costs associated with burning fossil fuels from their prices. When governments actually subsidize their use, they take the distortion even further. Worldwide, direct fossil fuel subsidies added up to roughly $500 billion in 2010. Of this, supports on the production side totaled some $100 billion. Supports for consumption exceeded $400 ...


    By Earth Policy Institute

  • ENEL launches a new LWT automated PLC controlled dredge in Guatemala

    Enel Latin America asked Liquid Waste Technology, LLC to design a LWT Pit Hog dredge equipped to excavate the main pond’s sediment from the Santa Maria River automatically. Enel Latin America needed a solution for removal of sediment accumulating in the power generation water supply at its Greenfield El Canada Power Plant in western Guatemala at Zunil. Enel Latin America asked Liquid Waste ...

  • Solar power generation by photovoltaic technology

    The various forms of solar energy, solar heat, solar photovoltaic, solar thermal electricity, and solar fuels offer a clean, climate-friendly, very abundant and in-exhaustive energy resource to mankind. Solar power is the conversion of sunlight into electricity, either directly using photovoltaic (PV), or indirectly using concentrated solar power (CSP). The research has been under way since the ...


    By Greenshine New Energy LLC

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