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Full-Text Articles in Mechanical Engineering
Development Of Phase Change Thermal Storage Medium: Cooking With More Power And Versatility, Martin Osei
Development Of Phase Change Thermal Storage Medium: Cooking With More Power And Versatility, Martin Osei
Masters Theses
With an Insulated Solar Electric Cooker (ISEC), a 100 W solar panel directly cooks food while providing 5W off-grid electricity access; but it cooks slowly. Storing the day’s energy with phase change thermal storage allows ISEC to cook more rapidly as well as cook after sunset. The ISEC is made by sticking a 3ohm resistive to an aluminum pot (inner phase change assembly PCA) where another cooking pot fits. The resistive heater is surrounded by a bigger pot (outer PCA) that contains the PCM and is tightly sealed. The solar panel is connected to the resistive heater with a thermal …
Characterization Of Near Isothermal Compression And Expansion For Energy Storage, Saiid Kassaee
Characterization Of Near Isothermal Compression And Expansion For Energy Storage, Saiid Kassaee
Doctoral Dissertations
As the global share of electricity generation from intermittent renewable energy sources increases, developing efficient and scalable electricity storage technologies becomes critical to modernizing the grid, matching the supply and demand, and raising the capacity factor of renewable generation. The Ground-Level Integrated Diverse Energy Storage (GLIDES) is an efficient energy storage technology invented at Oak Ridge National Laboratory (ORNL). GLIDES stores energy by compressing gas using a liquid piston in pressure vessels benefiting from employing hydraulic turbomachinery which are more efficient than gas turbomachinery. Therefore, GLIDES has higher round-trip efficiency (RTE) than Compressed Air Energy Storage (CAES). Since GLIDES employs …
Experimental Investigation Of Spray Cooling/Heating Of A Near-Isothermal Hydro-Pneumatic Energy Storage System, Saiid Kassaee
Experimental Investigation Of Spray Cooling/Heating Of A Near-Isothermal Hydro-Pneumatic Energy Storage System, Saiid Kassaee
Masters Theses
Proposing experimental investigation of spray cooling/heating of a near-isothermal, scalable, efficient, high density, hydro-pneumatic integrated energy storage system; capable of spray cooling/heating during gas compression/expansion and capable of excess heat integration. The invented Ground-Level Integrated Diverse Energy Storage (GLIDES) is an energy storage technology capable of storing energy in high-pressure vessel using hydro-pneumatic concept. Indicated roundtrip efficiencies of 98% can be reached using the proposed technology marking an isothermal compression/expansion energy storage.
Optimization Of Titanium Liquid/Gas Diffusion Layers In Proton Exchange Membrane Electrolyzer Cells, Stuart Mccoy Steen
Optimization Of Titanium Liquid/Gas Diffusion Layers In Proton Exchange Membrane Electrolyzer Cells, Stuart Mccoy Steen
Masters Theses
Polymer electrolyte membrane electrolyzer cells (PEMECs), which are reverse PEM fuel cells (PEMFCs), are effective energy storage medium by producing hydrogen/oxygen from water using electricity from renewable energy sources. This is due in part because of its efficiency, high energy density, compact design, and large capacity. In a PEMEC, a liquid/gas diffusion layer (LGDL) is located between the catalyst layer and the current distributing flow field. The LGDL is expected to transport electrons, heat, and reactants/products to and from the catalyst layer with minimum voltage, current, thermal, interfacial, and fluidic losses. Carbon materials (carbon paper or carbon cloth), typically used …
Investigation Of Compressed Air Energy Storage Efficiency, James W. Keeney
Investigation Of Compressed Air Energy Storage Efficiency, James W. Keeney
Master's Theses
This study investigates Compressed Air Energy Storage (CAES) application in the
electrical power and transportation industries. Information concerning current CAES projects is
presented. A thorough thermodynamic analysis of the CAES process is completed; including
theoretical efficiency determination for several variants of the compression and expansion
processes. Industry claimed efficiencies ranging from 26% to 82% are presented and explained.
Isothermal and Isentropic efficiency baselines are developed. Energy density of compressed air
on both a mass and volume basis is compared to other energy storage methods. Best expected
efficiency of a hypothetical CAES system is determined to be 34% using currently achievable …
Carbon-Free Compressed Air Energy Storage, Dustin Andrew Shively
Carbon-Free Compressed Air Energy Storage, Dustin Andrew Shively
Boise State University Theses and Dissertations
The inherent intermittency of the two fastest growing renewable energy sources, wind and solar, presents a significant barrier to widespread penetration and replacement of fossil-fuel sourced baseload generation. These intermittencies range from short term ramp events experienced by wind farms to the diurnal fluctuation of solar installations. Traditionally, grid operators have had very little control over demand and full control over supply. With the increase in wind and solar based generation onto an electric grid comes a decrease in control of supply. Grid operators are required to have a certain amount of spinning reserve ready to respond when wind or …