Current Search: Energy (x)
Pages
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Title
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Final Report: Siting study for a hydrokinetic energy project located offshore southeastern Florida: protocols for survey methodology for offshore marine hydrokinetic energy projects.
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Creator
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Vinick, C., Riccobono, A., Messing, Charles G., Walker, Brian K., Reed, John K., Rogers, S.
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Date Issued
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2012
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PURL
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http://purl.flvc.org/FCLA/DT/3340533
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Subject Headings
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Ocean energy resources, Renewable energy, Geophysical surveys
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Format
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Document (PDF)
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Title
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Changes in agar and other chemical constituents of the seaweed Gracilaria tikvahiae when used as a substrate in methane digesters.
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Creator
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Bird, Kimon T., Hanisak, M. Dennis, Ryther, John H.
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Date Issued
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1981
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PURL
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http://purl.flvc.org/FCLA/DT/3331823
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Subject Headings
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Gracilaria, Methane, Biogas, Energy crops, Biomass energy
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Format
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Document (PDF)
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Title
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The Soviet position on prohibition of atomic weapons and international control of atomic energy.
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Creator
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Vyshinsky, Andrey Yanuaryevich
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Date Issued
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1949
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PURL
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http://purl.flvc.org/fcla/DT/369047
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Subject Headings
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Nuclear energy., Atomic bomb.
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Format
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Document (PDF)
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Title
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TWO-DIMENSIONAL MODELING OF A SOLAR POND.
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Creator
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CANCIO, GUILLERMO LEOPOLDO., Florida Atlantic University, Duyar, Ahmet
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Abstract/Description
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A two-dimensional mathematical model is developed to analyze the thermal behavior of salt gradient solar ponds. This model can be used to evaluate the suitability of solar ponds for space heating and power generation as well as the thermal storage capability of the ground. The solar pond model adopted consists of an upper nonconvective zone and a lower convective zone. This model incorporates detailed representation of surface and ground heat losses. Solutions to the energy equation are...
Show moreA two-dimensional mathematical model is developed to analyze the thermal behavior of salt gradient solar ponds. This model can be used to evaluate the suitability of solar ponds for space heating and power generation as well as the thermal storage capability of the ground. The solar pond model adopted consists of an upper nonconvective zone and a lower convective zone. This model incorporates detailed representation of surface and ground heat losses. Solutions to the energy equation are obtained for both the pond and the ground. The energy equation for the lower convective zone is used to determine the energy that can be extracted from the pond.
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Date Issued
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1984
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PURL
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http://purl.flvc.org/fcla/dt/14174
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Subject Headings
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Solar ponds, Energy storage
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Format
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Document (PDF)
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Title
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Neuronal Energetics: Mitochondrial Distribution and The Phosphagen System.
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Creator
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Riboul, Danielle V., Macleod, Gregory T., Florida Atlantic University, Department of Biological Sciences, Charles E. Schmidt College of Science
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Abstract/Description
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The relationship between neuronal function and energy metabolism is a field of intense inquiry and while bioenergetic per se are well understood, we lack a good understanding of the ways in which these mechanisms overcome the challenges presented by the unique morphology of neurons and their volatile energy demands. Here we examined the extent to which these challenges can be met through strategic mitochondrial placement and the support of a phosphagen system. We examined fluctuations in...
Show moreThe relationship between neuronal function and energy metabolism is a field of intense inquiry and while bioenergetic per se are well understood, we lack a good understanding of the ways in which these mechanisms overcome the challenges presented by the unique morphology of neurons and their volatile energy demands. Here we examined the extent to which these challenges can be met through strategic mitochondrial placement and the support of a phosphagen system. We examined fluctuations in energy demand of Drosophila larval motor neurons utilizing a combination of computational modeling and empirical analysis, and uncovered a neglected aspect of cellular energy metabolism that appears to accommodate the stress of highly volatile energy demands. Our findings highlight a reliance on the phosphagen system to buffer against rapid changes in the rate of ATP consumption induced by burst firing. The knockdown of a key element in the phosphagen system of invertebrates, arginine kinase, revealed a suppression of the mitochondrial proton motive force, and a more rapid decline in the presynaptic ATP/ADP ratio during burst firing. The knock down of arginine kinase also revealed metabolic shifts that indicated a compensatory increase in glycolysis, but, surprisingly, few consequences for either presynaptic Ca2+ handling or neurotransmission. In a final effort to ensure that we were imposing a metabolic load adequate to challenge these motor neurons, we developed an ex vivo calcium clearance assay and in vivo locomotor performance assay – currently in their final stages of validation.
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Date Issued
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2024
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PURL
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http://purl.flvc.org/fau/fd/FA00014419
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Subject Headings
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Mitochondria, Neurons, Energy metabolism
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Format
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Document (PDF)
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Title
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Empirical Analysis of the Dissipated Acoustic Energy in Wave Breaking.
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Creator
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Francke, Kristina, Dhanak, Manhar, Florida Atlantic University, Department of Ocean and Mechanical Engineering, College of Engineering and Computer Science
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Abstract/Description
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In this research an attempt is made at explaining the physical processes behind energy dissipation during wave breaking, through spectral analysis of the resulting sound. The size of an air bubble can be directly linked to the frequency of the sound that is heard using the simple harmonic solution to the Rayleigh–Plesset equation. It indicates the inverse relationship between frequency and bubble size. And this relationship has been used to identify wave breaking in general [MANASSEH 2006]....
Show moreIn this research an attempt is made at explaining the physical processes behind energy dissipation during wave breaking, through spectral analysis of the resulting sound. The size of an air bubble can be directly linked to the frequency of the sound that is heard using the simple harmonic solution to the Rayleigh–Plesset equation. It indicates the inverse relationship between frequency and bubble size. And this relationship has been used to identify wave breaking in general [MANASSEH 2006]. Now this research goes a step farther and looks at how the frequency spectrum of the sound changes with time, in an effort to understand the general pattern and from that to deduce an empirical equation that describes the breaking down of turbulence during a wave breaking event. Two main processes have been identified, with the second process having three main indicators that are necessary to evidence wave breaking. The first process is a near instantaneous shattering of the initial air bubble into much smaller metastable bubbles of a size that appears to be common for all waves independent of wave height. Then in the second process, the bubbles continue to break down following a recognisable pattern.
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Date Issued
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2020
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PURL
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http://purl.flvc.org/fau/fd/FA00013504
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Subject Headings
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Waves, Energy dissipation, Spectral analysis, Fluid dynamics, Acoustic energy
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Format
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Document (PDF)
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Title
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Global distribution of ocean thermal energy conversion (OTEC) resources and applicability in U.S. waters near Florida.
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Creator
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Rauchenstein, Lynn., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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The following study explores the worldwide spatial and temporal distributions of electrical power that can be extracted from the ocean's stored solar energy via the process of closed-cycle ocean thermal energy conversion (OTEC). Special emphasis is placed on resources surrounding the state of Florida. The study combines oceanographic input from a state-of-the-art ocean circulation model, the Hybrid Coordinate Ocean Model, with a state-of-the-industry OTEC plant model to predict achievable...
Show moreThe following study explores the worldwide spatial and temporal distributions of electrical power that can be extracted from the ocean's stored solar energy via the process of closed-cycle ocean thermal energy conversion (OTEC). Special emphasis is placed on resources surrounding the state of Florida. The study combines oceanographic input from a state-of-the-art ocean circulation model, the Hybrid Coordinate Ocean Model, with a state-of-the-industry OTEC plant model to predict achievable power values across the world. These power predictions are then constrained by local replenishment rates of cold deep sea water to provide an upper limit to the sustainable OTEC resource. Next, the geographic feasibility of OTEC-coupled and OTEC-independent sea water cooling (air conditioning and refrigeration) are explored. Finally, the model data is validated against in situ oceanic measurements to ensure the quality of the predictions.
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Date Issued
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2012
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PURL
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http://purl.flvc.org/FAU/3358968
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Subject Headings
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Ocean energy resources, Ocean engineering, Geothermal energy, Power resources
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Format
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Document (PDF)
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Title
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A resource assessment of Southeast Florida as related to ocean thermal energy.
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Creator
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Leland, Anna E., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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An assessment of the thermal resource in the Straits of Florida was performed to estimate the Ocean Thermal Energy Conversion (OTEC) potential. Direct measurements of the temperature profile across the Florida Straits were taken from nearshore Southeast Florida to the Exclusive Economic Zone boundary along four evenly spaced transects perpendicular to Florida's Southeast coast, spanning 160 km. Along the southern transects in summer, nearshore cold and warm water resources meet or exceed the...
Show moreAn assessment of the thermal resource in the Straits of Florida was performed to estimate the Ocean Thermal Energy Conversion (OTEC) potential. Direct measurements of the temperature profile across the Florida Straits were taken from nearshore Southeast Florida to the Exclusive Economic Zone boundary along four evenly spaced transects perpendicular to Florida's Southeast coast, spanning 160 km. Along the southern transects in summer, nearshore cold and warm water resources meet or exceed the average 20ÀC temperature difference required for OTEC. In winter, the nearshore average DT of 17.76ÀC can produce 59-75% design net power and 70-86% in spring with DT averaging 18.25ÀC. Offshore along the southern transects, a high steady DT from 18.5- 24ÀC creates an annual average net power of 120-125MW. Along the northern transects, the nearshore resource does not exist, but a consistent OTEC resource is present offshore, providing 70-80% design net power in winter, and 100-158% in spring and summer.
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Date Issued
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2009
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PURL
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http://purl.flvc.org/FAU/369193
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Subject Headings
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Geothermal energy, Ocean energy resources, Ocean engineering, Power resources
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Format
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Document (PDF)
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Title
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THE APPLICATION OF THE ENERGY ACCOUNTANCY EQUATION IN THE INVESTIGATION OF ENERGY TRANSFER IN A THIN WALLED SHELL STRUCTURE.
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Creator
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SCHAPLEY, RAMON FRANK, II., Florida Atlantic University, Dunn, Stanley E., Cuschieri, Joseph M., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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The Energy Accountancy method is used to describe the response of a system by accounting for the various energy components in a system, that is components describing the input energy, the energy dissipated, and the energy transfered by the system. These components are functions of quantities that can be determined either through measurement or finite element analysis of the system. This concept is used in this study to determine the response of a small diameter pipe containing two different...
Show moreThe Energy Accountancy method is used to describe the response of a system by accounting for the various energy components in a system, that is components describing the input energy, the energy dissipated, and the energy transfered by the system. These components are functions of quantities that can be determined either through measurement or finite element analysis of the system. This concept is used in this study to determine the response of a small diameter pipe containing two different fluids, air and water. The results of this study have shown that the Snergy Accountancy method can be used to describe the response of a thin walled shell structure with good results. It has also been shown in this study that in small diameter pipes the fluid contained by the system can be considered to act as a reactive medium in the response of the structure.
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Date Issued
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1985
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PURL
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http://purl.flvc.org/fcla/dt/14277
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Subject Headings
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Force and energy--Analysis, Force and energy--Measurement
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Format
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Document (PDF)
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Title
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The experimental cultivation of the red seaweed Gracilaria tikvahiae as an "energy crop": an overview.
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Creator
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Hanisak, M. Dennis, Ryther, John H.
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Date Issued
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1986
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PURL
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http://purl.flvc.org/FCLA/DT/3327203
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Subject Headings
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Gracilaria, Red seaweeds, Energy crops
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Format
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Document (PDF)
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Title
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LOCALIZED FLOW MODIFICATION TO INCREASE POWER CAPTURE OF A SMALL-SCALE FLOATING UNDERSHOT WATERWHEEL.
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Creator
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Hess, Sullivan, Dhanak, Manhar, Florida Atlantic University, Department of Ocean and Mechanical Engineering, College of Engineering and Computer Science
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Abstract/Description
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The goal of the work described in this thesis is to design a flow augmentation device to increase the power capture and efficiency of a small-scale floating Under-Shot Water Wheel (USWW) currently being developed by Florida Atlantic University research funded by the U.S Department of Energy. The flow concentrator subsystem is intended to maximize the kinetic energy extracted by the marine hydrokinetic (MHK) energy collection device through modification of the local flow field across the...
Show moreThe goal of the work described in this thesis is to design a flow augmentation device to increase the power capture and efficiency of a small-scale floating Under-Shot Water Wheel (USWW) currently being developed by Florida Atlantic University research funded by the U.S Department of Energy. The flow concentrator subsystem is intended to maximize the kinetic energy extracted by the marine hydrokinetic (MHK) energy collection device through modification of the local flow field across the capture plane. The primary objective is to increase the velocity and/or rate of mass inflow through the turbine through inserting a streamlined body in the region of interest. By utilizing the resulting flow field to increase hydraulic forcing on the waterwheel blades, the torque and/or RPM of the USWW can be increased. Based on experimental testing in the FAU wave tank at 1:5 prototype scale (280 mm wheel diameter) the flow concentrator was shown to produce an increase in device power coefficient of 17-55% measured over a velocity range of 0.16-0.45 m/s.
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Date Issued
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2020
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PURL
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http://purl.flvc.org/fau/fd/FA00013613
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Subject Headings
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Water-wheels, Renewable energy
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Format
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Document (PDF)
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Title
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Aquatic plant aquaculture: a multiproduct/multiuse approach.
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Creator
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Bird, Kimon T., Ryther, John H., Harbor Branch Oceanographic Institute
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Date Issued
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1985
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PURL
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http://purl.flvc.org/FCLA/DT/3321219
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Subject Headings
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Biomass energy, Biomass energy--Congresses, Aquatic plants, Biomass energy--Research, Aquaculture
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Format
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Document (PDF)
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Title
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Sea current generator.
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Creator
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Wilson, Debra L.
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PURL
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http://purl.flvc.org/fcla/dt/3358745
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Subject Headings
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Energy, Ocean currents, Alternative energy sources, Renewable energy sources, Ocean wave power
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Format
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Document (PDF)
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Title
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Determining anchoring systems for marine renewable energy devices moored in a western boundary current.
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Creator
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Seibert, Michael G., Charles E. Schmidt College of Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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In this thesis anchoring systems for marine renewable energy devices are examined for an area of interest off the coast of Southeast Florida that contains both ocean current and thermal resources for future energy extraction. Bottom types observed during previous regional benthic surveys are compiled and anchor performance of each potential anchor type for the observed bottom types is compared. A baseline range of environmental conditions is created by combining local current measurements and...
Show moreIn this thesis anchoring systems for marine renewable energy devices are examined for an area of interest off the coast of Southeast Florida that contains both ocean current and thermal resources for future energy extraction. Bottom types observed during previous regional benthic surveys are compiled and anchor performance of each potential anchor type for the observed bottom types is compared. A baseline range of environmental conditions is created by combining local current measurements and offshore industry standards. Numerical simulations of single point moored marine hydrokinetic devices are created and used to extract anchor loading for two potential deployment locations, multiple mooring scopes, and turbine rotor diameters up to 50 m. This anchor loading data is used for preliminary anchor sizing of deadweight and driven plate anchors on both cohesionless and cohesive soils. Finally, the capabilities of drag embedment and pile anchors relevant to marine renewable energy devices are discussed.
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Date Issued
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2011
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PURL
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http://purl.flvc.org/FAU/3172697
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Subject Headings
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Ocean energy resources, Renewable energy sources, Deep-sea moorings, Ocean engineering, Geothermal energy
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Format
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Document (PDF)
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Title
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A hydrokinetic resource assessment of the Florida Current.
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Creator
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Smentek-Duerr, Alana E., College of Engineering and Computer Science, Department of Ocean and Mechanical Engineering
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Abstract/Description
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The Straits of Florida has been noted as a potential location for extraction of the kydrokinetic energy of the Florida Current, in view of the strength of the current and its proximity to the shore. ... This research explores the Florida Current as a potential renewable energy source. By utilizing historical data, in situ observations of the Florida Current, and computer model data, the hydrokinetic resource of the Florida Current is characterized both spatially and temporally. Subsequently,...
Show moreThe Straits of Florida has been noted as a potential location for extraction of the kydrokinetic energy of the Florida Current, in view of the strength of the current and its proximity to the shore. ... This research explores the Florida Current as a potential renewable energy source. By utilizing historical data, in situ observations of the Florida Current, and computer model data, the hydrokinetic resource of the Florida Current is characterized both spatially and temporally. Subsequently, based on the geographic variability of the hydrokinetic power and other factors that impact the economy of a hydrokinetic turbine array installation, the ideal locations for turbine array installation within the Florida Current are identified.... Additionally, an interactive tool has been developed in which array parameters are input - including installation location, turbine diameter, turbine cut-in speed, etc. - and array extraction estimates, ideal installation position, and water depth at the installation points are output. As ocean model data is prominently used in this research, a discussion about the limitations of the ocean model data and a method for overcoming these limitations are described. Globally, the distribution of hydrokinetic power intensity is evaluated to identify other currents that have a high hydrokinetic resource.
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Date Issued
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2012
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PURL
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http://purl.flvc.org/FAU/3356018
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Subject Headings
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Renewable energy sources, Energy consumption, Renewable natural resources, Ocean energy sources
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Format
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Document (PDF)
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Title
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Cultivation of seaweeds as abiomass source for energy.
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Creator
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Ryther, John H., Lapointe, Brian E., Stenberg, Richard W., Williams, Lavergne D.
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Date Issued
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1977
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PURL
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http://purl.flvc.org/fau/fd/FA00007128
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Subject Headings
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Seaweeds, Marine algae culture, Biomass, Biomass energy
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Format
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Document (PDF)
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Title
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Tropical macroalgal cultivation for bioconversion to methane.
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Creator
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Bird, Kimon T., Harbor Branch Oceanographic Institute
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Date Issued
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1987
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PURL
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http://purl.flvc.org/fau/fd/FA00007056
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Subject Headings
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Biomass, Methane, Gracilaria, Ulva, Renewable energy, Microalgae
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Format
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Document (PDF)
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Title
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Cost analyses of energy from marine biomass.
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Creator
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Bird, Kimon T., Harbor Branch Oceanographic Institute
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Date Issued
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1987
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PURL
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http://purl.flvc.org/FCLA/DT/3353794
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Subject Headings
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Biomass, Biomass energy, Cost analysis, Economic analysis
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Format
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Document (PDF)
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Title
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Anaerobic digestion and nutrient recyclingof small benthic or floating seaweeds.
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Creator
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Ryther, John H., Hanisak, M. Dennis
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Date Issued
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1981
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PURL
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http://purl.flvc.org/fau/fd/FA00007119
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Subject Headings
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Marine algae, Seaweeds, Biomass energy, Gracilaria, Sargassum
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Format
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Document (PDF)
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Title
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Land-based cultivation of seaweeds: an assessment of their potential yields for "energy farming.".
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Creator
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Hanisak, M. Dennis, Ryther, John H.
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Date Issued
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1983
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PURL
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http://purl.flvc.org/fau/fd/FA00007368
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Subject Headings
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Seaweeds, Gracilaria, Energy crops, Biomass, Methane
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Format
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Document (PDF)
Pages