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 17 of 17 for “"Thermal energy storage systems"”.
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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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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 …
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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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Electrically charged thermal energy storage systems for grid-level electricity storage
… to their intermittency. A change in methods of energy production globally that allows synergistic coupling of renewable and fossil fuels is needed. Currently, pumped hydroelectric and compressed air energy storage are the two most common methods of storage, but are highly geographic dependent …
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Heat Transfer Enhancement of Phase Change Materials for Thermal Energy Storage Systems
In recent studies, the energy storage capability of phase change materials (PCMs) in thermal energy storage systems, such as in the case of solar water heaters has attracted many attentions; however, PCMs may not be fully effective due to their poor heat transfer characteristics, namely thermal …
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Modeling, control, and design of hybrid electrical and thermal energy storage systems
Advances in power density, energy storage technology, and thermal management are crucial to the increased electrification of vehicles, including those with high ramp rate loads such as heavy construction and military vehicles. In this thesis, a hybrid electro-thermal energy storage system is …
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Modelling, design and analysis of innovative thermal energy storage systems using PCM for industrial processes, heat and power generation
… is framed on the study and the analysis of thermal energy storage (TES) systems based on phase change materials (PCM) to be used as a back-up for intermediate temperature applications (up to 250 °C). The work is divided in two part: the first part presents the development of numerical models …
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Numerical Design of a 3-Stage Cascaded Thermal Energy Storage System for Solar Application
The analysis of a three-stage cascaded thermal energy storage is presented in this dissertation. Cascaded thermal energy storage systems has many advantages over conventional thermal energy storages, majorly it allows for maintaining of a nigh-constant temperature between the HTF and PCM during the …
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Economic and Environmental Analysis of Cool Thermal Energy Storage as an Alternative to Batteries for the Integration of Intermittent Renewable Energy Sources
The balance of the supply of renewable energy sources with electricity demand will become increasingly difficult with further penetration of renewable energy sources. Traditionally, large stationary batteries have been used to store renewable energy in excess of electricity demand and dispatch the …
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Numerical and Experimental Study of Solidification Behavior in Thermal Storage Systems
<p>This dissertation investigates thermal energy storage systems for building applications through experimental validation, computational modeling, and geometric optimization of phase change material (PCM) systems. The study addresses limitations in empirical data, HVAC integration, and …
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Development of Advanced Adsorbent-beds for Storing Thermal Energy Derived from Solar and Waste Heat
… resource usage, and minimizing waste. Solar energy has played a vital role in advancing sustainability efforts. This energy can be harnessed as electricity or heat. Emerging technologies, including flat plate and evacuated tube collectors, provide promising pathways for harvesting solar …
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Numerical solution of multiple front phase change problems for modeling ice thermal storage systems
… problems with multiple fronts in cylindrical systems, which arise in ice-on-pipe brine thermal energy storage systems, are investigated in this study. Two numerical methods, the boundary element method ( BEM ) and the thermal network method ( TNM ), are developed to solve the multiple front …
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A Variation of Positioning Phase Change Materials (PCMs) Within Building Enclosures and Their Utilization Toward Thermal Performance
… more serious attention to help reduce global energy consumption. At the same time, thermal comfort has become an increasing concern for building occupants. Phase Change Materials (PCMs), which are capable of storing and releasing significant amounts of energy by melting and solidifying at a …
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Molten Salt Nanomaterials for Thermal Energy Storage and Concentrated Solar Power Applications
The thermal efficiency of concentrated solar power (CSP) system depends on the maximum operating temperature of the system which is determined by the operating temperature of the TES device. Organic materials (such as synthetic oil, fatty acid, or paraffin wax) are typically used for TES. This …
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Strategic Roadmapping and Technology Portfolio Selection for Heating Decarbonization in Canada
Heating systems contribute significantly to Canada’s greenhouse gas emissions, accounting for approximately 117 megatons of CO₂ equivalent. demanding urgent decarbonization to meet national climate targets. This thesis employs the Advanced Technology Roadmap Architecture framework, integrating …
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NUMERICAL AND EXPERIMENTAL ANALYSIS OF HEAT PIPES WITH APPLICATION IN CONCENTRATED SOLAR POWER SYSTEMS
Thermal energy storage systems as an integral part of concentrated solar power plants improve the performance of the system by mitigating the mismatch between the energy supply and the energy demand. Using a phase change material (PCM) to store energy increases the energy density, hence, reduces …