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Displaying Available Technologies results for Energy
WASTE HEAT THERMAL BATTERY
Heating, ventilation, and air conditioning (HVAC) systems control climates in buildings and vehicles. Most systems utilize compression and expansion of a cycled refrigerant, which consumes high amounts of energy. Thermal energy storage shows promise for harnessing and utilizing waste heat, but most thermal energy storage systems utilize intermetallic alloys, which come with high costs and low energy density.
The waste heat thermal battery can store and release energy in a controlled fashion to increase efficiency. The battery is charged and discharged cyclically to supply heating or cooling from stored thermochemical energy. It uses low cost ammonia and magnesium chloride to provide high heating and cooling power. The battery gathers energy from waste or ambient heat, which allows it to be powered by sources such as truck engines, solar heat, and off-peak industrial waste heat. Its characteristics facilitate use in HVAC systems for electric vehicles and long haul trucks, energy storage systems, stationary HVAC, and waste heat recovery systems.
FRACTURED RESERVOIR SIMULATOR
Fractured reservoirs are some of the most productive oil reserves in the world, but deviations in the geological formations surrounding the reservoir increase the time and cost of oil extraction. Oil and gas companies rely on advanced imaging techniques and computer generated models to determine how oil is flowing and manage surface parameters to get the most out of the reservoir. Fractured reservoir simulation, however, requires representing complex, irregular domains and complicated fracture networks that traditional simulation methods cannot handle.
The Fractured Reservoir Simulator uses control volume finite element formulations to enable field-wide reservoir simulation of complex domains and spatial fracture characterization. The simulator directly incorporates characterization of faults and fractures. Flux-based upstream weighting is employed to ensure flux continuity and solution stability. This enhances simulations by allowing for the combination of different physical and discretization models to cover a wider array of fractured reservoir characteristics.
LOW-FREQUENCY ENERGY HARVESTER
Self-powered wearables, such as watches, have existed for approximately 30 years. These wearables generate power using an eccentric rotor that rotates with movement. Certain types of motion facilitate energy generation better than others. However, harvesting energy from low-frequency motion, such as walking, has proven difficult, limiting the applications of low-frequency energy harvesters.
A new eccentric rotor design that includes a well-tuned rotational spring improves the amount of power generated by low-frequency motion up to 300 percent. Electricity is harvested from an optimized array of copper coils and magnets. Potential applications include low-power draw sensors, wearables, and communication systems.
SOLID POLYMER LITHIUM-ION BATTERIES
Conventional lithium-ion batteries provide satisfactory performance, but using liquid electrolyte creates the potential for solvent leakage and flammability hazard which has created safety and reliability concerns. Use of a solid polymer electrolyte would improve safety, but solid electrolytes often do not meet performance requirements due to low ionic conductivity at lower temperature.
These new Lithium-ion batteries utilize high performance nanocomposite solid polymer electrolytes (SPE) to improve safety and reliability. This new solid polymer electrolyte integrates low cost nanocomposite additives to allow high ionic conductivity at low temperatures, increased stability, and is pliable & moldable. Very positive test results have been obtained with the new SPE for use in lithium-sulfur, lithium-silicon, and lithium iron phosphate batteries. The new batteries can be used for energy storage, electric vehicles, portable electronics devices, sensors, and other applications.