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 13 of 13 for “"Efficient cooling"”.
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Model predictive control for energy efficient cooling and dehumidification
… buildings. Within commercial buildings, cooling equipment represents the second largest consumer of electricity. This research analyzes one option for reducing space cooling energy consumption, an advanced cooling system termed low-lift cooling system (LLCS). The system comprises …
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Evaluation of Existing Subsurface Cooling Systems Worldwide and Development of Efficient Cooling Methods and Systems Based on Renewable Energy Sources
… of mitigating heat will require substantial cooling capacity in some cases. For deep deposits to be mined at increasing depths, mechanical cooling systems used to maintain an acceptable underground climate will most surely become increasingly complex and expensive, which most certainly …
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Next-generation dedicated outdoor air cooling systems for low-energy buildings
… consumption in the United States, among which cooling energy comprises an especially significant part in hot and humid climates. To achieve low-energy and low-carbon building communities, it is necessary to design high-performance building enclosures and develop energy-efficient cooling …
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Continuous production of conducting polymer
… the rotating crucible and a more effective and efficient cooling mechanism.
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Integration of Trapped Ion System and Sympathetic Cooling with Multi-isotope Ions
… ion hardware, heating-induced decoherence, and efficient cooling mechanisms, by investigating multi-species or isotope ion chains with sympathetic cooling techniques. The study explores loading ion chains with 174Yb and 138Ba species, using an Nd:YAG ablation laser for isotope-selective …
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Energy relaxation and thermal rectification in carbon devices
… from battery-limited portable devices to cooling in massive data centers. The most often cited technological roadblock of nanoscale electronics is the \textquotedblleft{}power problem\textquotedblright{} i.e. power densities and device temperatures reaching levels that will prevent their …
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Optical cooling using the dipole force
The term 'laser cooling' is applied to the use of optical means to cool the motional energies of either atoms and molecules, or micromirrors. In the literature, these two strands are kept largely separate; both, however suffer from severe limitations. Laser cooling of atoms and molecules largely …
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Manufacturing and analysis of a LIGA heat exchanger for the surface of a tube: a cooling simulation of the leading edge region of a turbine blade
… in the gas turbine engine where improved, efficient cooling is required includes gas turbine blades, stator vanes, the turbine disk, and the combustor liner. In this dissertation, the primary application of interest is the use of such heat exchangers to cool airfoils such as turbine blades. …
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Heat Transfer and Hydrodynamics of Miscible/Immiscible Systems in Microchannel Devices
… devices increase significantly. Hence, efficient solutions need to be proposed to prevent the abovementioned problems and provide efficient cooling. Regarding the geometrical design of the cooling system, amongst various methods to improve the rate of heat transfer, the use of …
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Fabrication and Characterization of Superconducting Core Fibers with Fused Silica Cladding
… with relatively inexpensive liquid nitrogen cooling. Recently, the integration of superconductivity and optical waveguides has put forward the potential for ultrasensitive, ultra-fast and ultralow noise light detectors. However, simple and cost effective superconductor designs and fabrication …
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Non-equilibrium dynamics of ultracold atoms in optical lattices
… in the Bose-Hubbard Model and exploring novel cooling techniques for ultracold gases in optical lattices. In the first experiment, we study quenches across the Mott-insulator-to-superfluid quantum phase transition in the 3D Bose-Hubbard Model. The quench is accomplished by continuously tuning …
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Molecular Dynamics Study of Solid-Liquid Heat Transfer and Passive Liquid Flow
… is a challenging problem in boilers, electronics cooling, concentrated photovoltaic and other power conversion devices. Heat transfer by phase change is one of the most efficient mechanisms for removing heat from a solid surface. Futuristic electronic devices are expected to generate more than …
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Geometric and numerical optimisation of single- and two-phase convective heat transfer in microchannel heat sinks
Innovative and efficient cooling systems are required for the present and future high heat flux applications because natural and forced air convection and many other cooling methods employing liquid coolants cannot meet up with the challenges. More transistors are added to the surfaces of …