Advanced Geothermal Energy Conversion Systems

DiPippo, Ronald

doi:10.1016/b978-0-08-098206-9.00009-9

Cited by 4 publications

(4 citation statements)

References 8 publications

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“…The RST has the ability to generate power using a two-phase, liquid-vapor stream, while simultaneously separating and pressurizing the liquid in preparation for reinjection. Some conventional applications of RST are geothermal energy systems [101] and refrigeration cycles [102]. However, to the best of our knowledge, practical applications of RST at supercritical pressures are still not reported.…”

Section: Scwo For Energy Productionmentioning

confidence: 99%

Supercritical water oxidation with hydrothermal flame as internal heat source: Efficient and clean energy production from waste

Queiroz

Bermejo

Mato

et al. 2015

The Journal of Supercritical Fluids

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Section: Scwo For Energy Productionmentioning

confidence: 99%

Supercritical water oxidation with hydrothermal flame as internal heat source: Efficient and clean energy production from waste

Queiroz

Bermejo

Mato

et al. 2015

The Journal of Supercritical Fluids

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“…As for the three thermal systems, the power generation performance is primarily determined by the turbine efficiency and inlet flow state. So far, no total flow turbines are commercially available for geothermal application [25], but previous and ongoing research has indicated its promising potential [13,22]. Four average total flow turbine efficiencies (η tave ) have been conservatively set as 20%, 30%, 40%, and 50% for the trilateral flash system (TFS) according to previous investigations in similar applications [26].…”

Section: Simulation Descriptionmentioning

confidence: 99%

Combined Power and Freshwater Generation Driven by Liquid-Dominated Geothermal Sources

2019

Energies

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In order to meet the twin challenges of energy shortage and water scarcity in eastern Africa, this paper looks at the feasibilities of using a geothermal water source to produce both fresh water and electricity. In this research, three geothermally sourced combined power and freshwater generation systems are investigated and compared. Two of them are based on traditional power generation systems, including a steam system (SS) and a single-flash system (SFS). The third one is a trilateral flash system (TFS) with a two-phase turbine, which processes the total geofluid flow from the wellhead directly. The power generation potential as well as the condensation process, which produces desalinized freshwater, are investigated for three systems under two typical liquid-dominated well conditions in the Aluto Langano geothermal field in Ethiopia. Results indicate that, suitable total flow turbine efficiency enables the trilateral flash system to be comparable with the steam system and the single-flash system regarding the power generation, especially when the well flow is more liquid dominated. Moreover, freshwater generation is a distinct advantage of the trilateral flash system, and its freshwater output can reach up to be 2.7 times higher than those of traditional systems, making it a promising solution for combined power and freshwater generation.

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“…In addition, systems for dealing with hyper saline brines have just recently begun to be exploited [94]. DiPippo presented appropriate energy conversion systems, including binary cycle, single-flash, double-flash, and triple-expansion systems, for geofluid produced by EGS based on the EGS geofluid temperature and pressure [95]. The representative energy conversion systems of EGS projects currently in operation are shown in Table II.…”

Section: Energy Conversion Systemsmentioning

confidence: 99%

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid

Zhang

et al. 2015

Int. J. Energy Res.

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Summary Enhanced geothermal systems (EGS) technology is regarded as the future of geothermal energy and could become a major energy source in the future. However, EGS technology is not well developed. The challenges of EGS technology development, such as the small heat‐recovery factors and water limitations, need to be addressed. A comprehensive understanding of heat transfer in the complex subsurface structures is crucial for energy management in the reservoir, and an accurate heat transfer model of the reservoir is a key tool to optimize heat extraction to improve the heat‐recovery factor. The use of CO2 as the EGS working fluid is regarded as an emerging technology to address water limitations. The analytical solutions, lab‐scale experiments, field‐scale modeling methods of water/CO2 fluid flow and heat transfer in the reservoir, and a thermodynamic analysis of the energy conversion system at the surface are reviewed in this paper. Based on the existing literature, future research should focus on improving our knowledge and optimizing the heat transfer performance in the reservoir. Moreover, the emerging design of a heat exchange network in the reservoir and CO2‐EGS could result from technology development. Copyright © 2015 John Wiley & Sons, Ltd.

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Advanced Geothermal Energy Conversion Systems

Cited by 4 publications

References 8 publications

Supercritical water oxidation with hydrothermal flame as internal heat source: Efficient and clean energy production from waste

Supercritical water oxidation with hydrothermal flame as internal heat source: Efficient and clean energy production from waste

Combined Power and Freshwater Generation Driven by Liquid-Dominated Geothermal Sources

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid

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Advanced Geothermal Energy Conversion Systems

Cited by 4 publications

References 8 publications

Supercritical water oxidation with hydrothermal flame as internal heat source: Efficient and clean energy production from waste

Supercritical water oxidation with hydrothermal flame as internal heat source: Efficient and clean energy production from waste

Combined Power and Freshwater Generation Driven by Liquid-Dominated Geothermal Sources

A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO2as working fluid

Contact Info

Product

Resources

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A review on heat transfer and energy conversion in the enhanced geothermal systems with water/CO₂as working fluid