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 37 for “"heat extraction"”.
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Heat extraction for the CSPonD thermal storage unit
Three coiled tube heat exchanger prototypes were designed to extract heat from containers holding 0.5 kg, 2.3 kg, and 10.5 kg of Sodium Nitrate-Potassium Nitrate salt. All of the prototypes were left with an open surface free to undergo radiation losses and surface convection. The first objective …
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Thermal Numerical Analysis of Vertical Heat Extraction Systems in Landfills
… to the operation of a vertical ground source heat pump (i.e., heat extraction system, HES). Elevated landfill temperatures, reported various researchers, impact the engineering performance of landfill systems. A numerical model was developed to analyze the influence of vertical HES operation …
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The Influence of Curvature on Mantle Convection featuring a Temperature-dependent Viscosity
… (core-to-surface radii-ratio, f) and constant heating conditions and viscosity contrast across the mantle depth (ΔηT). The onset of the stagnant-lid regime occurs for different conditions for bodies with relatively small cores and relatively thin shells. Differences in mean temperature and flow …
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Application of the Finite Element Method to Solve Coupled Multiphysics Problems for Subsurface Energy Extraction
… as an alternative option. To improve the heat extraction from closed-loop wells, this research study in chapter 4 suggests highly conductive hydraulic fractures for CLGS to improve heat extraction rate. The results suggest that fractures significantly improve thermal power and cumulative …
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Design and optimization of an ultra-compact thermal management system integrated with micro-fins for high power applications
… A key component that requires significant heat extraction (several hundreds of watts up to 1 kW) are silicon photo-conductive semiconductor switches (Si-PCSS). Many methods of thermal management have been studied, which include (in order from lowest to highest heat extraction performance) …
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The kinetics of growth competition during rapid solidification of ternary steel alloys
… into liquid alone. A growth model involving heat extraction was developed that successfully characterizes this behavior. In the model, heat is extracted from the austenite dendrite tip to the pre-exisitng ferrite solid, which acts as a heat sink. The latent heat of fusion rejected at the tip …
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Thermo-mechanical behavior of steel in the continuous casting process from meniscus to caster exit
… conditions in secondary cooling consider the heat extraction of roll contacts and water sprays individually. Specialized boundary conditions are used to simulate bending and unbending and the hard box bending assumption is used. Good agreement is found between the model predicted surface …
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Design considerations of a 15kW heat exchanger for the CSPonD Project
The objective of this work was to develop a 15 kW heat exchanger model for the CSPonD molten salt receiver that will shuttle the molten salt's thermal energy for conversion to electric power. A heat extraction system comprising of an intermediate heat exchanger placed inside the molten salt …
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The titration of an immunogenic agent against Leptospira pomona using Syrian golden hamsters (Cricetus auratus)
… from the soluble antigen prepared by the acid-heat extraction of living cultures of Leptospira pomona. They also reveal that the antigen must be given in quantities sufficiently small to be amenable to the system of the test animal or a condition of ”immunogenic paralysis“ results. Due to the …
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Solar Colletors Combined with Ground-Source Heat Pumps in Dwellings - Analyses of System Performance
The use of ground-source heat pumps for heating buildings and domestic hot water in dwellings is increasing rapidly in Sweden. The heat pump extracts heat from the ground by a U-pipe in a vertical borehole. In order to reduce the electricity demand in the system, the combination with solar …
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A passive cooling design for multifamily residences [sic] in hot, humid climates
… a seasonal cooling reservoir coupled to a heat pump DHW heater. The continuous heat extraction from the cooling reservoir for DHW needs makes the reservoir an effective cooling resource in the summer.
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Alternative structures for integrated electromagnetic passives
… management is made based on loss estimation. The heat extraction technology is developed to improve the heat removal ability and further improve the power density of integrated passives. The experimental results verify the power density improvement from the proposed stacked structure and the …
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Seismic and gravitational studies of melting in the mantle's thermal boundary layers
… locations with features of the hydrothermal heat extraction system in the upper crust such as microseismicity caused by thermal cracking and high temperature hydrothermal vent systems observed on the seafloor. The third study uses two-dimensional global pseudospectral seismic wave propagation …
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Novel turbomachinery concepts for highly integrated airframe/propulsion systems
… compressor cooling combines the compressor and heat exchanger function to stretch turbopropulsion system operational limits. Axial compressor performance with blade passage heat extraction is assessed with computational experiments and meanline modeling. A cooled multistage compressor with …
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Seismic and gravitational studies of melting in the mantle's thermal boundary layers
… locations with features of the hydrothermal heat extraction system in the upper crust such as microseismicity caused by thermal cracking and high temperature hydrothermal vent systems observed on the seafloor. The third study uses two-dimensional global pseudospectral seismic wave propagation …
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Joule heating and pore pressure evolution, magmatic intrusions at continental rifts, and microseisms in Yellowstone Lake
… develop new technologies to economically extract heat from these resources. In Chapter 2, microseism events in Yellowstone National Park are studied. Yellowstone is located in one of the most seismically active volcanic calderas in the world and is a widely studied area for investigating physical …
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Atomic alkali lasers pumped by the dissociation of photoexcited alkali-rare gas collision pairs
… have been measured and may potentially mitigate heat extraction issues associated with high power, large volume lasers. XPALs operating on both the n2P1=2 ! n2S1=2 (D1) or n2P3=2 ! n2S1=2 (D2) transitions of Cs (n = 6) and Rb (n = 5) have been experimentally investigated and show promise for …
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Joule Heating and Pore Pressure Evolution, Magmatic Intrusions at Continental Rifts, and Microseisms in Yellowstone Lake
… develop new technologies to economically extract heat from these resources. In Chapter 2, microseism events in Yellowstone National Park are studied. Yellowstone is located in one of the most seismically active volcanic calderas in the world and is a widely studied area for investigating physical …
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Energy Efficient Passenger Comfort in Underground Subway Environments
… deep and old subway systems suffer from overheating problems, because they were built before the invention of modern mechanical ventilation and air conditioning, resulting in passenger discomfort and health issues during summer conditions (Gilbey et al., 2011). These systems were not designed …
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A soluble acid-heat extracted Brucella vaccine: immunological and physiological studies in guinea pigs, rabbits, and calves
A soluble acid-heat extracted Brucella vaccine: Immunological and physiological studies in guinea pigs, rabbits and calves. 143 p. Dissertation. 1959. -- A soluble-type vaccine was prepared by the acid-heat extraction of Brucella abortus Strain 2 308 and its metabolic by-products in Stuart• s …
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