Autonomous Sensor Fish to Support Advanced Hydropower Development
An improved sensor fish with robust design and enhanced measurement capabilities. This sensor fish contains sensors for acceleration, rotation, magnetic field intensity, pressure, and temperature. A low-power microcontroller collects data from the sensors and stores up to 5 minutes of data on a non-volatile flash memory. A rechargeable battery supplies power to the sensor fish. A recovery system helps locating sensor fish. The package, when ready for use is nearly neutrally buoyant and thus mimics the behavior of an actual fish.
Autonomous Sensor Fish to Support Advanced Hydropower Development
An improved sensor fish with robust design and enhanced measurement capabilities. This sensor fish contains sensors for acceleration, rotation, magnetic field intensity, pressure, and temperature. A low-power microcontroller collects data from the sensors and stores up to 5 minutes of data on a non-volatile flash memory. A rechargeable battery supplies power to the sensor fish. A recovery system helps locating sensor fish. The package, when ready for use is nearly neutrally buoyant and thus mimics the behavior of an actual fish.
Method for Autonomous Establishment and Utilization of An Active-RF Tag Network
The Battelle-conceived "FlexiTag" is a small, bendable/flexible RF active sensor tag. The intent is for the tag to be in a self-contained, molded package (1.25" x 1.5" x 0.2") that could conform to objects that have rounded or curved surfaces. The package would be totally encased in a pliable package making it impervious t the Help environment such as moisture and dust. Due to the ultimate projected price being inexpensive, the tag will be a disposal device - no maintenance such as battery replacement. For ease of use the tag would have a peel-off adhesive backing for mounting.
Joint Center for Energy Storage Research
PNNL is one of five national laboratory JCESR -- a bold effort to transform the way we store energy to power vehicles and the electric grid.
Redox Flow Batteries Having Multiple Electroactive Elements
A new Redox flow battery system, vanadium-iron hybrid redox flow system, is developed. By using V2+/3+ redox couple containing solution in anolyte and using Fe2+/3+ and V4+/5+ containing solution as catholyte, this new system combines the advantages of both Fe-V and all vanadium systems, and eliminates their major disadvantages. Advantages with this new system over the previous systems have been demonstrated. To prevent Fe2+/3+ and V2+/3+ cations cross over through membrane, mixed Fe2+/3+ and V2+/3+ solutions is used for this new system.
Iron-sulfide redox flow batteries
Iron-sulfide redox flow battery (RFB) systems can be advantageous for energy storage, particularly when the electrolytes have pH values greater than 6. Such systems can exhibit excellent energy conversion efficiency and stability and can utilize low-cost materials that are relatively safer and more environmentally friendly. One example of an iron-sulfide RFB is characterized by a positive electrolyte that comprises Fe(III) and/or Fe(II) in a positive electrolyte supporting solution, a negative electrolyte that comprises S.sup.2- and/or S in a negative electrolyte supporting solution, and a membrane, or a separator, that separates the positive electrolyte and electrode from the negative electrolyte and electrode.
Microbatteries to Power Electrical Devices
GRID REGULATION SERVICES FOR ENERGY STORAGE DEVICES BASED ON GRID FREQUENCY
Disclosed herein are representative embodiments of methods, apparatus, and systems for charging and discharging an energy storage device connected to an electrical power distribution system. In one exemplary embodiment, a controller monitors electrical characteristics of an electrical power distribution system and provides an output to a bi-directional charger causing the charger to charge or discharge an energy storage device (e.g., a battery in a plug-in hybrid electric vehicle (PHEV)). The controller can help stabilize the electrical power distribution system by increasing the charging rate when there is excess power in the electrical power distribution system (e.g., when the frequency of an AC power grid exceeds an average value), or by discharging power from the energy storage device to stabilize the grid when there is a shortage of power in the electrical power distribution system (e.g., when the frequency of an AC power grid is below an average value).
Grid Regulation Services for Energy Storage Devices Based on Grid Frequency
Disclosed herein are representative embodiments of methods, apparatus, and systems for charging and discharging an energy storage device connected to an electrical power distribution system. In one exemplary embodiment, a controller monitors electrical characteristics of an electrical power distribution system and provides an output to a bi-directional charger causing the charger to charge or discharge an energy storage device (e.g., a battery in a plug-in hybrid electric vehicle (PHEV)). The controller can help stabilize the electrical power distribution system by increasing the charging rate when there is excess power in the electrical power distribution system (e.g., when the frequency of an AC power grid exceeds an average value), or by discharging power from the energy storage device to stabilize the grid when there is a shortage of power in the electrical power distribution system (e.g., when the frequency of an AC power grid is below an average value).