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 22 for “"Cooling strategy"”.
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System identification and optimal control for mixed-mode cooling
… to fresh air. Implementation of an alternative cooling strategy-mixed-mode cooling-is demonstrated in this thesis to yield substantial savings in cooling energy consumption in many U.S. locations. A mixed-mode cooling strategy is one that relies on several different means of delivering cooling …
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Effects of milling methods, cooling strategies and end-mill coatings on machinability in high speed end-milling of Inconel- 718 using carbide end-mills
… affinity with many cutting tools. Appropriate cooling strategies, milling methods, tool coatings and cutting speeds play important roles in addressing these problems. This research presents the results of the effects of end-milling methods (Up and down-milling), cooling strategies (Conventional …
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Assessment of the Thermal Advantages of Biased Supersonic Cooling
… work investigates an alternative supersonic film cooling method for hydrogen-fueled, gas-generator cycle rocket engines. The research is intended to serve as an initial proof-of-concept for a biased supersonic film cooling method envisioned for nozzle extension thermal management. The proposed …
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Numerical and analytical modelling of battery thermal management using passive cooling systems
… the design and modelling of different passive cooling management solutions from single battery to module level. A simplified one-dimensional transient computational model of a prismatic lithium-ion battery cell is developed using thermal circuit approach in conjunction with the thermal model of …
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Assessment of the Thermal Improvements Awarded by Horseshoe Vortex Elimination on a Turbine Stator Blade in Computational Fluid Dynamics and Conjugate Heat Transfer
… more precisely in the choice of material, the cooling strategy, the mechanical properties, and the cost of the new blade. In addition, a conjugate heat transfer analysis is made on the interior of the blade, to evaluate the heat dissipation through internal cooling. The software tools used in …
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Mechanistic modeling of cutting forces in wavy-edge bull-nose helical end-milling of Inconel 718 under different cooling-lubrication strategies
… high-speed end-milling of Inconel 718 under two cooling strategies: emulsion and Minimum Quantity Lubrication (MQL). The effects of the cooling strategies are incorporated into the mechanistic model through six cutting force coefficients (K<sub>tc</sub>, K<sub>rc</sub>, K<sub>ac</sub>), and edge …
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Aerospike Rocket Motor Structural Webbing
… rig has been the development of regenerative cooling techniques using nitrous oxide as coolant and oxidizer, as well as validation of technologies relating to the annular aerospike nozzle. In order to prevent undesirable deflection of the cantilevered spike, a structural stiffening web, …
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Mashrabiya in passive cooling: Integrating Concepts of Mashrabiya into an Innovative Ceramic Evaporative Screen
Designing a multifunctional outdoor evaporative cooling screen in water-scarce hot-dry regions has posed a significant challenge. In areas where temperatures reach extreme levels during the summer and access to water is limited, the need for passive cooling strategies is urgent. While shading …
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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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Cooling with less: Design and simulation of multifunctional building components for a material-efficient, heat-resilient architecture
… although often an effective and accessible cooling solution, are energy-intensive and typically fail to consider local climatic and urban contexts. This work alternatively focuses on the opportunity behind designing building components (such as slabs, blocks, roofs, or footings) for …
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Data center cooling using Aquifer Thermal Energy Storage (ATES)
… and nearly 40% of their demand comes from cooling alone, underscoring the need for more energy-efficient and sustainable cooling methods. This thesis develops a comparative techno- economic framework to evaluate two advanced cooling strategies. Magnetic bearing chillers (MBC) and MBC + …
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Thermal Comfort and Building Design Strategies for Low Energy Houses in Libya: Lessons from the vernacular architecture
… reduction of the energy demand for heating and cooling is the key factor in the low energy houses and minimizing environmental damage caused by the emissions of carbon dioxide. In this thesis the traditional vernacular houses in Libya have been used as a vehicle of the research. The houses have …
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Towards sustainable machining of difficult-to-cut materials using nano-cutting fluids
… difficulties that arise during machining. Flood cooling is a typical cooling strategy used in industry to dissipate the high heat generated during machining difficult-to-cut materials; however, the use of flood coolant has raised environmental and health concerns which call for different …
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Surface structure enhanced microchannel flow boiling of low surface tension fluids
… operating temperatures suitable for electronics cooling, and hydrofluoroether (HFE) 7000, an environmentally friendly dielectric fluid. Though there are benefits to using these alternative working fluids, several of their thermophysical properties involved in generating capillary flows are …
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METHANE MITIGATION, FEED EFFICIENCY, AND HEAT STRESSIN REPLACEMENT HEIFERS: NUTRITIONAL ANDMANAGEMENT APPROACHES FOR SUSTAINABLE DAIRYPRODUCTION
… a control group (C), a conduction-based micro-cooling system applied in the resting and feeding areas (F) and shifting feed delivery to the cooler hours of the day (N). The study showed that, although modifying the feeding schedule altered feeding behavior by increasing intake during night and …
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Metabolic responses to soccer-specific intermittent exercise.
… increased ambient temperature and whole body pre-cooling on performance. The work-rate profiles of elite South American soccer players and English Premier League players, performing in international and club level respectively, were determined. English Premier League players covered a greater …
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Practical precooling strategies and cycling time trial performance
Whole-body precooling can improve endurance exercise performance, especially in the heat; however there are logistical considerations that restrict the use of various precooling strategies prior to actual competition. Precooling is proposed to collectively reduce deep skin and body temperature and …
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Thermal Modelling, Management, and Electrical Safety Assessment for Containerised Vanadium Flow Battery Systems
… when the ambient temperature is high. Passive cooling is not sufficient to maintain VFB normal operation for high ambient temperature range sceneries. This dynamic thermal model provides essential support for the thermal management of large-scale containerised VFB systems applied across diverse …
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Evaluating and enhancing design for natural ventilation in walk-up public housing blocks in the Egyptian desert climatic design region
… ventilation performance and its use as a passive cooling strategy in walk-up public housing blocks within the Egyptian desert climatic region. This research attempts to maximize the benefits from the vast investments made in housing projects in Egypt through providing thermally comfortable housing …
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Three-Phase and Unidirectional Heat Transfer
… packaging, metallurgy, as the existing cooling solutions are highly constrained. For example, the cooling strategy for aircraft must be executed in such a way that will operate independently of orientation while also screen out external heat loads coming from the neighboring electronic …
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