Sökning: "underground storage"

Visar resultat 11 - 15 av 25 avhandlingar innehållade orden underground storage.

1. 11. Characterisation and Modeling of Discontinuous Rock Mass: Geostatistical Interpretation of Seismic Response to Fracture Occurrence, Discrete Fracture Network Modeling and Stability Predictions for Underground Excavations

   Författare :Peter Starzec; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; keyblock predictions; induced seismicity; stochastic fracture network; geostatistics;

   Sammanfattning : Geometric and mechanical characterisation of rock discontinuities is an essential constituent in deriving a reliable assessment of overall properties of crystalline rock mass. The knowledge about the occurrence, size, geometry pattern and intensity of joints/fractures is necessary to predict the performance of fractured rock as a fractured reservoir, or an underground transport and storage facility. LÄS MER

3. 12. A Thermoeconomic Evaluation of CO2 Capture with Focus on Gas Turbine-Based Power Plants

   Författare :Björn Fredriksson Möller; Kraftverksteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Termisk teknik; climate change; optimisation; genetic algorithms; applied thermodynamics; Thermal engineering; AZEP; GTPOM; gas turbine; CO2 capture; thermoeconomy; termodynamik;

   Sammanfattning : The increasing emissions of carbon dioxide from fossil fuel burning are today thought to be one of the main contributors to global warming. At the same time, developing countries are striving for an increased welfare and burning more fossil fuel, which in turn is augmenting the greenhouse gas effect. LÄS MER

4. 13. Joint inversion and integration of multiple geophysical data for improved models of near-surface structures

   Författare :Shunguo Wang; Alireza Malehmir; Mehrdad Bastani; Thomas Kalscheuer; Mark Everett; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; joint inversion; ERT; RMT; CSRMT; boat-towed; tomography; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

   Sammanfattning : Geophysical methods are non-invasive and allow an effective way of understanding subsurface structures and their physical properties. One of the main challenges is the often non-uniqueness of the geophysical models and that several different models can explain a dataset to an agreeable fit. LÄS MER

5. 14. Numerical modeling of groundwater and air flow between compacted bentonite and fractured crystalline rock

   Författare :Benoît Dessirier; Jerker Jarsjö; Andrew Frampton; Stefan Finsterle; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Two-phase flow; porous media; fractured media; compacted bentonite; crystalline rock; numerical modeling; geological disposal; Physical Geography; naturgeografi;

   Sammanfattning : The geological repository for final storage of spent nuclear fuel, envisioned by the Swedish Nuclear Fuel and Management Company (SKB), relies on several barriers: copper canisters deposited in holes in the floor of underground tunnels in deep bedrock, embedded in a buffer of compacted bentonite. The initially unsaturated buffer would take up water from the surrounding rock mass and swell to seal any potential gap. LÄS MER

7. 15. Dormancy in reproductive vegetative buds in creeping perennials dominating the agricultural weed flora in Scandinavia

   Författare :Josefine Liew; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
   Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

   Sammanfattning : Dormancy, which is the inability to initiate normal growth under otherwise favourable conditions, is an adaptation to escape sprouting prior to seasonal cold temperatures and/or drought in areas where winters are harsh or summers dry. Dormancy in woody perennials of northern temperate areas is, in general, induced by photoperiodic and/or temperature changes, and released after prolonged exposure to chilling. LÄS MER