Results 21 to 30 of about 21,973 (307)

Transport of Geothermal Fluids along Dikes and Fault Zones

Energies, 2022
Field observations of active and fossil natural geothermal fields indicate that geothermal fluids are primarily transported along dikes and fault zones. Fluid transport along dikes (commonly through fractures at their margins) is controlled by the cubic ...
Agust Gudmundsson
doaj   +1 more source

The Carbon Dioxide Emission as Indicator of the Geothermal Heat Flow: Review of Local and Regional Applications with a Special Focus on Italy

Energies, 2021
We review the methods based on the measurement of CO2 emissions for the computation of geothermal heat flow, both at a local (hydrothermal sites, a few km2) and regional scale (hundreds km2).
Giovanni Chiodini, Carlo Cardellini, Giulio Bini, Francesco Frondini, Stefano Caliro, Lisa Ricci, Barbara Lucidi   +6 more
doaj   +1 more source

Injection-Triggered Occlusion of Flow Pathways in Geothermal Operations

Geofluids, 2018
Reasons for injectivity decline were investigated in a low-enthalpy geothermal aquifer in Klaipeda (Lithuania). It is one of the study sites within the DESTRESS project, which demonstrates different stimulation techniques in geothermal reservoirs. Due to
Maren Brehme, Simona Regenspurg, Peter Leary, Fatih Bulut, Harald Milsch, Sigitas Petrauskas, Robertas Valickas, Guido Blöcher   +7 more
doaj   +1 more source

Novel District Heating Systems: Methods and Simulation Results

Energies, 2021
Fifth-generation district heating and cooling (5th DHC) systems offer promising approaches to decarbonizing space heating, cooling and domestic hot water supply.
David Huber, Viktoria Illyés, Veronika Turewicz, Gregor Götzl, Andreas Hammer, Karl Ponweiser   +5 more
doaj   +1 more source

Correction to: Cyclic soft stimulation (CSS): a new fluid injection protocol and traffic light system to mitigate seismic risks of hydraulic stimulation treatments

Geothermal Energy, 2019
After publication of the article [1], it has been brought to our attention that there is an error in Figure 7. Instead of the “2” in the first row of the green and yellow stages of the traffic light system it should be a “3”.
Hannes Hofmann, Günter Zimmermann, Arno Zang, Ki‑Bok Min   +3 more
doaj   +1 more source

Repurposing idle wells in the North German Basin as deep borehole heat exchangers

Geothermal Energy
This study investigates the feasibility to repurpose wells from gas production for geothermal closed-loop application in the North German Basin (NGB). The objective for this research topic is to extend the value-added chain of idle wells by re-completion
Nora Koltzer, Johannes Schoenherr, Maximilian Sporleder, Jan Niederau, Florian Wellmann   +4 more
doaj   +1 more source

Solar thermal vs. PV with a heat pump: A comparison of different charging technologies for seasonal storage systems in district heating networks

Energy Conversion and Management: X
The majority of district heating networks (DHNs) in Germany and other European countries are still supplied by fossil fuels. While several possible technical solutions exist to decarbonize DHNs, the problem is the availability of solar energy – thermal ...
M. Sporleder, M. Rath, M. Ragwitz
doaj   +1 more source

Cyclic soft stimulation (CSS): a new fluid injection protocol and traffic light system to mitigate seismic risks of hydraulic stimulation treatments

Geothermal Energy, 2018
Hydraulic stimulation treatments are standard techniques to access geologic resources which cannot economically be exploited with conventional methods. Fluid injection into unproductive formations may increase their permeability by forming new fractures ...
Hannes Hofmann, Günter Zimmermann, Arno Zang, Ki-Bok Min   +3 more
doaj   +1 more source

From Lab to Landscape: Environmental Biohybrid Robotics for Ecological Futures

Advanced Robotics Research, EarlyView.
This Perspective explores environmental biohybrid robotics, integrating living tissues, microorganisms, and insects for operation in real‐world ecosystems. It traces the leap from laboratory experiments to forests, wetlands, and urban environments and discusses key challenges, development pathways, and opportunities for ecological monitoring and ...
Miriam Filippi
wiley   +1 more source

Hydrogen (H2) Recovery From Hydrogen Sulfide (H2S): Current Technologies, Challenges, and Future Outlook

Advanced Science, EarlyView.
ABSTRACT Hydrogen sulfide (H2S) can be transformed into hydrogen (H2) through several chemical and catalytic processes, offering a promising route for both waste treatment and clean H2 production. This colorless, flammable, and toxic gas is found abundantly in swamps, volcanoes, hot springs, sewages, other natural gas fields, and even in refineries and
Divyesh Cirikonda, Astrid Campos‐Mata, Sehmus Ozden, Shreyasi Chattopadhyay, Pulickel M. Ajayan   +4 more
wiley   +1 more source