Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"cavern"”.
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Seismic analysis of a large size underground cavern
… openings such as powerhouses and hydroelectric caverns is presented.
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Probabilistic assessment of engineering rock properties in Singapore for cavern feasibility
Singapore conducted various cavern studies since the 1990s, and has since constructed two caverns. The study done in this thesis concentrates on an area of interest within South-Western Singapore, using four logged boreholes that are each 200 meters in depth. Through the use of the empirical …
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Experimental and computational study of non-turbulent flow regimes and cavern formation of non-Newtonian fluids in a stirred tank
… mixed in a stirred tank at low Reynolds numbers caverns can be formed around the impeller. If the fluid contains a yield stress the cavern has a fixed boundary where no flow occurs outside of it. When the fluid does not contain a yield stress a pseudo-cavern is formed, the cavern boundary is not …
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Parallel computation in efficient non-linear finite element analysis with applications to soft-ground tunneling project
… by the construction of a large underground cavern for the Rio Piedras station in San Juan, Puerto Rico. This project involved the construction of a large, horseshoe-shaped cavern (17m wide and 16m high) in weathered alluvial soils. The crown of the cavern is located less than 5.5m below …
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The Paper-Haired God
… disappear forever, he finds himself in a large cavern. After exploring the cavern he relives a memory from his childhood where he almost drowned in the Uji River. Then he is pulled out from under the sink by his wife. After his recovery he begins to realize that the world he left when he went …
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Time-lapse electrical resistivity tomography applied to cave sustainability (Barbados) and groundwater exploration (Saint Lucia)
… stability of the roof of the Great Hall cavern in the Harrison's cave system, Barbados. We present an interpretation and comparison of two sets of resistivity data collected over the Great Hall: one set collected by us in 2010, the other in 1996. Our results show that fracturing and …
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Rheological effects on gas dispersion in a pilot scale mechanical flotation cell
… yield stresses resulted in the formation of a 'cavern' of slurry around the impeller region. Within this 'cavern', high power intensities exist around the impeller where small bubbles are formed. However due to the formation of the 'cavern', the slurry in the bulk cell remains relatively …
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Drift Tubes Trigger System of the CMS Experiment at LHC : Commissioning and Performances
… to detect cosmic rays crossing the CMS cavern, are presented. These include analyses on the precision and accuracy of the trigger reconstruction mechanism and measurement of the trigger efficiency. The description of a method to perform system synchronization is also reported, together …
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Compressed air storage for electricity generation in South Africa
… pressure systems were investigated and mine cavern conversion costs where estimated per electric energy generated (R/kWh). Two of the most likely CAES turbo-machinery configurations suitable for South Africa were evaluated in chapter five, conceptual designs and cost analysis. The two types …
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Assessment of compressed air energy storage system (CAES)
… percent, and the remaining due to heat loss from cavern, oil tanks and energy lost in exhaust air. Based on the current data on the capital and energy storage costs that accounts for the round trip efficiencies, it is estimated that the simple payback for CAES is significantly (5 to 25 years) …
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A Quantitative Analysis of Interstitial Fluid-Chemistry and Limestone Dissolution Rates Within the Clastic Sediment of a Karst Aquifer Conduit, Mammoth Cave, Kentucky
… interface beneath a flowing stream? If not, cavern enlargement might be dominated by flood conditions when the bare rock of the walls and ceiling are in contact with the dissolving fluids. An approach using limestone tablet weight loss experiments, along with water sampling and geochemical …
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Modeling the Impact of the Inflation Reduction Act and Hydrogen Storage in Salt Caverns in the Mid-Atlantic United States
… promising locations for hydrogen storage in salt caverns. After applying a coarse techno-economic filter, the storage potential of the remaining high value caverns is 9.7 × 108 metric tons of H2 or 32.4 PWh in Michigan and 1.6 × 107 metric tons of H2 or 0.54 PWh in the Appalachian region. We then …
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Microstructure-based modeling of damage and healing in salt rock with application to geological storage
… polycrystals and predict damage around a salt cavern used for high-pressure gas storage. This study is expected to improve the fundamental understanding of damage and healing in rocks, and the long-term assessment of geological storage facilities.
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The oligo-miocene sediments of the Maltese Islands
… re-defined, and a prolonged episode of Cainozoic cavern development, associated with subaerial and submarine subsidence is postulated on the basis of structural and sedimentological interpretations.
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'Walk the Perimeter': Stories of Place in the Falkland Islands
… with thousands of burrows. Each burrow ends in a cavern with a small thin-billed prion chick. I will never experience this cross section as imagined, but it can be otherwise sensed. This thesis is about stories of place, how these develop, how they are encompassed in landscape, and how one might …
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Marketing Theatre to the Millennial Generation: A Marketing Initiative for Stageworks, a Professional Regional Theatre in Tampa, Florida (A Professional Problem)
… on a journey to explore one corner of this vast cavern of challenges. Within the last decade, organizations like the National Endowment for the Arts and the Theatre Communications Group have admonished arts organizations and administrators to become particularly mindful of and innovative about …
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Spectacles Plastiques : reconstruction and the debates on the "Synthesis of the Arts" in France, 1944-1962
… such as the Architects' House and the Cavern of Anti-Matter.
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High-energy Neutron Backgrounds for Underground Dark Matter Experiments
… from muons interacting with the underground cavern rock and materials surrounding a dark matter detector.</p> <p>The Neutron Multiplicity Meter (NMM) is a water Cherenkov detector capable of measuring the cosmogenic neutron flux at the Soudan Underground Laboratory, which has an overburden of …
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Hydrogen Storage Potential of the Salina Group, Appalachian and Michigan Basins
… of hydrogen storage. This thesis focuses on salt cavern hydrogen storage through evaluation of the hydrogen storage potential and its associated costs of the Salina Group evaporites in two adjacent sedimentary basins, the Appalachian Basin and the Michigan Basin. The Michigan Basin Salina Group …
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Speleogenesis in Comal County, Texas
… this can be eliminated as the primary cause of cavern development. Vadose inflow and the mixing effect which Thrailkill (1968) has postulated as causes of increased solution do not seem responsible either. All the conduit caves examined in detail, however, occur in areas of ground-water …
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