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 469 for “"Thermal energy"”.
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Modelling aquifer thermal energy storage systems
Aquifer thermal energy storage systems can decarbonise space heating and cooling, provide large-scale long-term storage and buffer the seasonal mismatch in supply and demand. In the winter, the system provides a heat source by extracting warm water from a subsurface reservoir. The extracted fluid …
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Assessment of ocean thermal energy conversion
Ocean thermal energy conversion (OTEC) is a promising renewable energy technology to generate electricity and has other applications such as production of freshwater, seawater air-conditioning, marine culture and chilled-soil agriculture. Previous studies on the technology have focused on promoting …
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Multiphysics processes in solid thermal energy storage
Um die zuverlässige Integration von Solarthermieanwendungen (ST), z.B. konzentrierte Solarenergie (concentrating solar power, CSP) bei steigendem Energiebedarf und trotz des fluktuierenden Charakters von ST zu ermöglichen, werden thermische Energiespeichertechnologien (TES) als attraktive Lösungen …
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Design of Latent Thermal Energy Storage Systems
… and numerical study of time dependent storage of energy by melting a phase change material. The heating is provided along invading lines, which change from single-line invasion to tree-shaped invasion. Chapter 2 identifies the special design feature of distributing energy storage in time-dependent …
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Analysis and optimisation of thermal energy storage
The focus of this project is the storage of thermal energy in packed beds for bulk electricity storage applications. Packed beds are composed of pebbles through which a heat transfer fluid passes, and a thermodynamic model of the heat transfer processes within the store is described. The packed …
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Thermal energy system synthesis : the origin and development of a scientific procedure for the design of thermal energy systems
ix, 175 leaves : ill., graphs, tables ; 30 cm.
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Performance investigation of various cold thermal energy storages
… and melting of some typical encapsulated ice thermal energy storage geometries. Using ANSYS GAMBIT and FLUENT 6.0 software, HTF fluid motion past encapsulated water (ice) geometries, varying HTF flow rates and inlet temperatures are analyzed. The main source of irreversibility was from entropy …
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Thermal energy storage for building-integrated photovoltaic components
Strathclyde theses - ask staff. Thesis no. : T12901
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Representation of thermal energy in the design process
The goal of thermal design is to go beyond the comfort zone. In spatial design architects don't just look up square footage requirements and then draw a rectangle that satisfies the givens. There must be an interpretation. The requirements will be met. but there will be many other layers added. …
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Thermal energy grid storage : liquid containment and pumping
As the cost of renewable energy falls below fossil fuels, the key barrier to widespread sustainable electricity has become availability on demand. Energy storage can enable dispatchable renewables, but only with drastic cost reductions compared to current batteries. In this thesis, I investigate an …
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Laboratory-Scale Thermal Energy Grid Storage (TEGS) Prototype
Grid-scale long duration energy storage will be necessary to maintain grid reliability in the US and beyond as intermittent renewables become the dominant source of electricity generation. An appealing long duration energy storage technology is thermal energy storage due to its low energy-based …
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Understanding and engineering azobenzene for thermal energy storage
… as azobenzene which holds unique properties for thermal storage applications. The azobenzene molecule undergoes structural change into a metastable state which has the ability to store energy. This thesis utilizes the energy storage and structural change properties of this molecule to develop new …
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An efficient heat engine for ocean thermal energy conversion
Carbon-dioxide-absorptive ocean thermal energy conversion (OTEC) holds the promise to provide 2-3 orders of magnitude more energy than current world consumption from fossil fuels, nuclear, hydroelectric, and all other alternative energy sources combined. However, the ten-fold capital costs of ocean …
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Application of Chemical Looping for Solar Thermal Energy Storage
In the recent years, Thermal Energy Storage (TES) systems have received significant attention because they can offer a low-cost Concentrating Solar Power (CSP) plant. Moreover, TES systems increase the economic viability of CSP plant for dispatchable power production over other renewable energy …
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Data center cooling using Aquifer Thermal Energy Storage (ATES)
… 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 + aquifer thermal energy storage (ATES) against a …
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Low-grade Thermal Energy Harvesting and Waste Heat Recovery
… an extremely promising source of renewable energy. A cost-effective method for recovering the low-grade heat will have a transformative impact on the overall energy scenario. Efficiency of heat engines deteriorates with decrease in hot-side temperature, making low-grade heat recovery complex …
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Additive Manufacturing for Phase Change Thermal Energy Storage and Management
… change materials can enhance the performance of energy systems by time shifting or reducing peak thermal loads. Certain electronic devices such as batteries, laser systems, or electric vehicle power electronics are highly transient and require pulse heat dissipation. Heat sinks, or thermal …
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Design of rectifier power supplies for Thermal Energy Storage System
Energy storage systems have been brought to focus as means to reduce the high fluctuation in the production side and facilitate integration of renewable energy sources. This work is focused on investigating design and utilizing of cost-effective Thermal Energy Storage System (TESS) which has longer …
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The thermal energy performance of domestic dwellings in the UK
… retrofit measures in terms of whole house energy efficiency. The researcher has undertaken studies in a whole house test facility in a climate controlled chamber, which has allowed for work to be undertaken that challenges the existing assumptions within regulatory steady state models, such …
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Optimal operation and design of solar-thermal energy storage systems
… on the optimal operation and design of solar-thermal energy storage systems. First, optimization of time-variable operation to maximize revenue through selling and purchasing electricity to/from the grid is presented for a thermal energy storage system. Time-variable electricity prices and …
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