Journal ArticleDOI
Emerging geothermal energy technologies
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TLDR
In this paper, a broad overview of geothermal energy, with a focus on the emerging technologies of Enhanced Geothermal Systems (EGS) and Ground Source Heat Pumps (GSHPs), is presented.Abstract:
Geothermal energy, whether as a source of electricity or to heat or cool buildings, has an enormous potential as a renewable energy source. This paper presents a broad overview of geothermal energy, with a focus on the emerging technologies of Enhanced Geothermal Systems (EGS) and Ground Source Heat Pumps (GSHPs). EGS and GSHP systems are important because of their potential for widespread use, as opposed to traditional geothermal energy systems which are generally limited to tectonically active regions. Commercial application of EGS technology is some years off but its enormous potential demands investment for further research. GSHP heat pump technology is available now — policy makers need to be educated and the potential of GSHPs demonstrated. Research should focus on optimising the design of the in-ground component of GSHP systems to maximise their economic, as well as environmental, benefits.read more
Citations
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Journal ArticleDOI
Enhanced geothermal systems (EGS): A review
TL;DR: The Geodynamics plant in Habanero (Australia), which started up on 2 May 2013, is the first privately run commercial EGS plant to produce electricity on a large scale.
Journal ArticleDOI
Thermal conductivity of soils and rocks from the Melbourne (Australia) region
David Barry-Macaulay,Abdelmalek Bouazza,Rao Martand Singh,Bill Wang,Pathegama Gamage Ranjith +4 more
TL;DR: In this article, the authors present the results of a laboratory study of the thermal conductivity of six soils and three rock types was experimentally measured using both a thermal needle probe and a divided bar apparatus.
Journal ArticleDOI
A state-of-the-art review of sustainable energy based freeze proof technology for cold-region tunnels in China
TL;DR: In this paper, the main available thermal insulation methods and their application are discussed and analyzed based on field investigations, and the optimization design method for tunnel heat insulation and anti-freezing by using geothermal energy and presented the challenges for future applications of ground-source heat pump (GSHP) system in tunnels.
Journal ArticleDOI
Evaluation of thermal efficiency in different types of horizontal ground heat exchangers
TL;DR: In this paper, the results of experiments on the heat exchange rates of horizontal slinky, spiral-coil and U-type GHEs installed in a steel box were presented.
Journal ArticleDOI
The importance of surface air temperature fluctuations on long-term performance of vertical ground heat exchangers
TL;DR: In this paper, a 3D detailed numerical model of ground source heat pump (GSHP) was developed to evaluate the thermal effects of surface air temperature changes on GHEs.
References
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Journal ArticleDOI
Direct utilization of geothermal energy 2015 worldwide review
John W. Lund,Tonya L. Boyd +1 more
TL;DR: In this article, the authors reviewed the worldwide application of geothermal energy for direct utilization and compared data from 1995 and 2000 presented at two World Geothermal Congresses in Italy and Japan (WGC95 and WGC2000).
Journal ArticleDOI
Energy foundations and other thermo-active ground structures
TL;DR: Energy foundations and other thermo-active ground structures, such as energy wells, pavement heating, and pavement heating represent an innovative technology that contributes to environmental protection and provides substan... as discussed by the authors.
Journal ArticleDOI
Vertical-borehole ground-coupled heat pumps: A review of models and systems
TL;DR: A detailed literature review of the research and developments of the vertical-borehole ground-coupled heat pump (GCHP) technology for applications in air-conditioning is given in this paper.
Journal ArticleDOI
Geothermal power generation in the world 2005–2010 update report
TL;DR: In this paper, the authors analyzed the major activities carried out for geothermal electricity generation since WGC2005 and found that an increase of about 2 GW (herein we use MW and GW for the electrical capacity and MWth and GWth for thermal capacity) in the five year term 2005-2010 has been achieved (about 22%), following the rough linear trend of approximately 400MW/year, with an evident increase of the average value of about 200 MW/year in the 2000-2005 period.
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