Geothermal Articles
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Decentralised energy: powering a sustainable future
With rising fuel prices putting households under pressure, Helen Andrews Tipper, Public Sector Energy Programmes Manager, explains how decentralised energy schemes provide an alternative solution How we generate and consume energy is perhaps the most significant threat to economic and social wellbeing that we face today. Already high energy prices are only predicted to keep rising. Our current ...
By Carbon Trust
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Dynamic simulation and 2D multiple scales and multiple sources within basin geothermal field
In order to accurately describe the geothermal field within a basin, it is necessary to divide it into the normal geothermal field and additional geothermal field. For the accuracy by describing of the additional geothermal field, grids need to be increased. Traditional unequal interval difference method can be used to solve this problem, which has to increase grids within the unnecessary area, ...
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Exergetic and sustainability performance assessment of geothermal (ground source) ejector heat pumps
Although ejectors have been used in cooling/refrigeration and Heat Pumps (HP) applications for a long time, utilisation of Geothermal Ejector Heat Pump (GEHP) with Ground–Heat Exchanger (GHE) is a new idea, which has recently appeared in the literature. In this study, we model a GEHP system with a GHE in terms of exergetic aspects and apply our model to this system in the heating mode. The system ...
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Investigation of a hybrid solar and geothermal driven absorption cooling system for district applications
In this paper, a new hybrid geothermal and solar driven absorption cooling system (ACS) is proposed for low–temperature district energy applications. Two approaches are proposed in this study, namely: a) a new model for determining the specific entropy values of LiBr–water solution and (b) two new energetic and exergetic parameters, namely geothermal contribution index and solar contribution ...
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Heat as a by–product or sub–product of CO2 storage in mafic and ultramafic rocks
Since carbonates are at a lower energy state than free CO2, storage through carbonation of silicate rocks is thermodynamically favoured and proceeds spontaneously by releasing heat. In an in–situ CO2 injection site, the heat released in these exothermic reactions can be exploited in a geothermal power–plant, effectively contributing toward the economic viability of the storage process. Our ...
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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 of building in a maintenance programme at the outset to achieve the maximum potential from that system. He goes on to outline some of the problems that could compromise a ...
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Asia–Pacific Analysis: The slow road to green energy
More Asia–Pacific countries need to embrace renewable energy and follow the first tentative steps of some governments, says Crispin Maslog. The South-East Asia and Pacific region is blessed with abundant sources of 'green' energy — including sun, wind, water, biomass and geothermal — but governments are still not doing enough to harness them. The 30 countries in this part of ...
By SciDev.Net
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Heather glen country house hotel – renewable energy advice case study
Background Heather Glen Country House Hotel in Cumbria was undertaking a major extension and alterations to the premises and sought advice from Envirolink Northwest on how to make energy improvements. Envirolink Northwest recommended a switch from LPG to a renewable biomass fuel, which was followed by assistance with an application for a local grant to help with the cost. The grant was awarded to ...
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Electricity production from geothermal sources by binary system; choosing secondary fluids
Because of the increasing prices of fossil fuels and the demand for cleaner electricity production, many sources of renewable energy have been proposed. Although Turkey has the seventh highest geothermal potential in the world and the second highest in Europe, electricity generation from geothermal energy is quite low. The purpose of this article is to search for the possibility of electrical ...
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Thermodynamic analysis and assessment of space heating with ground–source heat pump for sustainable future
In this paper, the thermodynamic modelling of exergy loss, exergy efficiency, exergy destruction rate, environmental destruction coefficient, improvement potential, exergy destruction factor, relative irreversibility, productivity lack and exergetic factor of ground source heat pump (GSHP) system are investigated. The results show that these exergy indexes should be used integratively. Compressor ...
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Infrastructural and policy challenges with achieving fossil fuels free energy supply: the case of the City of Leeuwarden
The city council of Leeuwarden has an ambitious goal - to make the city's overall energy supply fully independent from fossil fuels by the year 2020. All energy required by the city should be derived either from sun, wind, geothermal sources and/or locally produced 'green' gas. To achieve this goal the city has initiated the programme 'Slim with Water and Energy', focusing on four themes: energy ...
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Fukushima Meltdown Hastens Decline of Nuclear Power
On May 5, 2012, Japan shut down its Tomari 3 nuclear reactor on the northern island of Hokkaido for inspection, marking the first time in over 40 years that the country had not a single nuclear power plant generating electricity. The March 2011 earthquake, tsunami, and subsequent Fukushima Daiichi nuclear meltdown shattered public confidence in atomic energy, thus far making it politically ...
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Asia-Pacific Analysis: Go green not nuclear
Crispin Maslog says the region should follow the Philippines' lead and focus on renewable, not nuclear power. A year after the Fukushima nuclear disaster, questions remain over the role of nuclear power in the developing world, including South-East Asia and the Pacific. Nuclear power had a renaissance, driven by rapidly growing energy demands, and fading memories of high-profile disasters at ...
By SciDev.Net
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Developing power
The invention of a long-lasting incandescent light bulb in the 19th century spurred on the second wave of the industrial revolution, illuminating homes, extending leisure time and bringing us to the point today where many millions of people use a whole range of devices from mood lighting to audiovisual media centers, microwave ovens to fast-freeze ice makers, and allergy-reducing vacuum cleaners ...
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Building a lower carbon construction industry
Dominic Burbidge, Senior Client Manager Carbon Trust Advisory takes a cradle-to-grave view of the construction sector value chain Carbon reduction is a complex challenge for all organisations, not least those in the construction industry. Taking a cradle-to-grave view of the construction sector value chain means considering all aspects of the design, construction, use and demolition of buildings ...
By Carbon Trust
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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 ...
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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 ...
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US Carbon Emissions Down 7 Percent in 4 Years: Even Bigger Drops Coming
Between 2007 and 2011, carbon emissions from coal use in the United States dropped 10 percent. During the same period, emissions from oil use dropped 11 percent. In contrast, carbon emissions from natural gas use increased by 6 percent. The net effect of these trends was that U.S. carbon emissions dropped 7 percent in four years. And this is only the beginning. Graph on U.S. Energy-Related ...
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IF Technology - Netherlands based Sun Solutions deploys eSight with SharePoint integration for management of geothermal energy systems at IF Technology
IF Technology is Europe’s foremost specialist on geothermal energy systems. In the Netherlands over a thousand systems are in place where heat from the summer and cold from the winter is stored underground to be used again six months later. Needless to say, making use of nature’s own heating and cooling equipment makes for a very energy efficient way to get a comfortable temperature ...
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The right mix: the Philippines achieving its renewable energy goals
The global energy system is undergoing a transition from fossil fuels to renewable energy. There are clear signs that the pace of change is accelerating. 2009 was the second year in a row that more money was invested worldwide in renewable electricity generation projects than in fossil fuel-powered plants, according to data published by the United Nations. Developing countries, especially in ...
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