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 18 of 18 for “"cooling requirements"”.
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Investigation of Concrete Wall Systems for Reducing Heating and Cooling Requirements in Single Family Residences
… exterior finishes, insulation, and even heating/cooling systems into a single manufactured building panel. The ICF system is a cast-in-place concrete panel system that does not offer the level of integration found in the MPP system but has become increasingly accepted in the building construction …
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The effect of heat insulation on the cooling requirements of the internal structure of high-speed vehicles
… determining the effect of heat insulation on the cooling requirements of the internal structure of a high-speed vehicle. The governing equation for heat conduction through an isotropic solid was developed, and then modified to account for nonhomogeneous materials. The initial and boundary …
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Design Optimization of Hybrid Switch Soft-Switching Inverters using Multi-Scale Electro-Thermal Simulation
… to electro-thermal analysis can help shape cooling requirements and heat sink designs to maintain certain junction temperatures, there is no guarantee that the design under study is the most optimal. This dissertation uses electro-thermal simulation to guarantee an optimal design and thus …
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Analysis and feasibility of an evaporative cooling system with sessile droplet evaporation to provide cooling for microprocessors
The study investigates the cooling requirements for the Intel Xenon Processor and the Intel Core i7-900 Processor using diffusion based evaporation of sessile droplets. An analytical model is developed to determine the capacity of a single layer of droplets to provide sufficient cooling. It is …
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Desktop systems for manufacturing carbon nanotube films by chemical vapor deposition
… such diverse fields as composites, electronics, cooling, energy storage, and biological sensing. For the United States Navy, composites potentially provide a significant decrease in lifetime maintenance costs of ships by eliminating hull corrosion. A stronger composite could also improve naval …
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Vapor-liquid-solid (VLS) growth of lead chalcogenide thin films for infrared sensing applications
… and cumbersome due to the need for cryogenic cooling, while thermal detectors are inexpensive but not very sensitive. The goal of this project is to develop materials for uncooled IR sensors with improved performance. Lead selenide (PbSe) detectors are direct narrow band gap materials that …
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Continuous Co-Separation by Liquid Absorption in Aqueous Cuprous Chloride (CuCl) and Magnesium Chloride (MgCl2) Solution
… materials used are relatively cheap, heating and cooling requirements are lower than similar processes, and operation is relatively simple.
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The impact of conventional and wide bandgap semiconductor PWM inverter EDM bearing currents on motor bearings.
… higher switching frequencies for the same device cooling requirements as conventional silicon (Si) devices. A key issue produced by these PWM motor drives is premature bearing failure due to an increase in vibration from the damage caused by electric discharge machining (EDM) bearing currents. …
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Active Control Of Noise Radiated From Personal Computers
As an indirect consequence of increased heat cooling requirements, personal computers (PC) have become noisier due to the increased use of fans. Hard disk drives also contribute to the annoying noise radiated by personal computers, creating a need for the control of computer noise. Due to size …
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An analysis of annual environmental conditions and heat gains, and theoretical assessment of approaches to improve summer thermal comfort, of the Energy Research Centre at the University of Cape Town
… a simple solution would be to install an active cooling system, first consideration should be given to the deployment of preventative cooling measures and retrofits. By these means, the costs of an active cooling system would be reduced, as well as the building's relative increase in energy …
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New frontiers in THz quantum cascade lasers
… and photonic devices. However, the demanding cooling requirements for THz QCL have been a hard brake in the race for achieving compact and portable systems, and they have confined THz QCL systems to a laboratory environment. Therefore, raising the maximum operating temperature to above that of …
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Radial parallel plate flow with mechanical agitation
Computer processors have significant and rising cooling requirements, with electronics cooling estimated to consume 1% of global energy consumption. An integrated fan heat sink was designed to help alleviate this issue, and is designed to simultaneously improve heat transfer and efficiency. Current …
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Hybrid SC-Inductive Based Topologies for Low-volume High-efficiency Switched-mode Power Supplies
… volume due to more demanding filtering and also cooling requirements. Therefore strong and ever increasing demands for developing smaller and more efficient SMPS with high conversion ratios exist.In this work two new converter topologies suitable for applications with large input-to-output …
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Recycling clock network energy in high-performance digital designs using on-chip DC-DC converters
… digital designs because of packaging and cooling requirements. At multi-GHz clock rates in use today, charging and discharging CMOS gates and wires, especially in clocks with their relatively large capacitances, leads to significant power consumption. Recovering and recycling the stored …
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Assessment of the Impact of Climate Change on the Performance of Residential Buildings in New Zealand
… climate change scenarios on the heating and cooling requirements of residential buildings across different regions in New Zealand. The study compared the effect of changes in building codes on the energy consumption of residential buildings in future years, based on the New Zealand building …
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The design of a residential water-to-water heat pump
… and more important as a means of heating and cooling homes. The American family is booming increasingly aware of year—round air conditioning in all its various aspects, not only for hosting and cooling the homo, but also for humidity control and air filtration. All those tasks may be …
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Unified zero-current-transition techniques for high-power three-phase PWM inverters
… switching frequency and simplification of the cooling requirements under ZCT operations are discussed. In addition, a generalized ZCT cell concept is developed based on the proposed three-switch ZCT topology. This concept leads to the discovery of a family of simplified multilevel …
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Heating, ventilating and air-conditioning system energy demand coupling with building loads for office buildings.
… Different HVAC systems have different energy requirements when responding to the same building heating and cooling demands. On the other hand, building heating and cooling demands depend on various parameters such as building fabrics, glazing ratio, building form, occupancy pattern, and many …