Energy

Thermoelectric Energy Conversion Technology for High-Altitude Airships

The High Altitude Airship (HAA) has various application potential and mission scenarios that require onboard energy harvesting and power distribution systems. The power...

Spring Tire

LED Lighting for Maintenance and Construction Vehicles

Strobe or rotating beacon-type emergency lighting is a requirement on all Minnesota Department of Transportation (Mn/DOT) maintenance and construction vehicles. There is an effort to...

Nickel-Zinc Battery System Technology

Société de Conseil et de Prospective Scientifique (SCPS), located in Rosny-sous-Bois, France, developed a technology that allows the nickel-zinc battery system to work as close as possible to its...

Diffuse-Illumination Systems for Growing Plants

A proposed plant-growth system takes advantage of the highly diffuse reflective surfaces on the interior of a sphere, hemisphere, or other nearly enclosed structure that is coated with highly...

Fish Schooling as a Basis for Vertical Axis Wind Turbine Farm Design

Most wind farms consist of horizontal axis wind turbines (HAWTs), but an alternative paradigm for wind energy extraction is found in vertical axis wind turbine (VAWT) designs. A single spatially-isolated VAWT has a significantly lower power coefficient.

Effects of Cerium Removal from Glass on Photovoltaic Module Performance and Stability

In recent years, better stabilizer formulations for ethylene vinyl-acetate have been developed, giving more confidence in the long-term stability of PV packaging materials. Because of this, some manufacturers have stopped using Ce-doped glass. National Renewable Energy Laboratory researchers studied Ce-free glass.

Integral Battery Power Limiting Circuit for Intrinsically Safe Applications

A circuit topology has been designed to guarantee the output of intrinsically safe power for the operation of electrical devices in a hazardous environment. This design...

Integrated Solar Concentrator and Shielded Radiator

Development of Advanced LED Phosphors by Spray-based Processes for Solid-State Lighting

Luminescent materials were developed using aerosol processes, for making improved LED devices for solid-state lighting. In essence this means improving...

Sliding Mode Pulsed Current Averaging IC Drivers for High-Brightness Light Emitting Diodes

Light Emitting Diode (LED) driver ICs associated with specific (uniquely operated) switching power supplies that optimize performance for High Brightness...

Power Generator With Thermo-Differential Modules

Mechanical Extraction of Power From Ocean Currents and Tides

A proposed scheme for generating electric power from rivers and from ocean currents, tides, and waves is intended to offer economic and environmental advantages over prior such...

Fuel-Cell-Powered Vehicle With Hybrid Power Management

Fuel-Cell Water Separator

Extended Shelf Life for PMR Polyimide Resins and Prepregs

An improved class of formulations for PMR polyimide resins retards the imidization that undesirably occurs during handling and storage. While imidization is desired at the final...

High-Efficiency Artificial Photosynthesis Using a Novel Alkaline Membrane Cell

A new cell designed to mimic the photosynthetic processes of plants to convert carbon dioxide into carbonaceous products and oxygen at high efficiency, has an...

Fluoroester Co-Solvents for Low-Temperature Li⁺ Cells

Electrolytes comprising LiPF6 dissolved in alkyl carbonate/fluoroester mixtures have been found to afford improved low-temperature performance and greater high-temperature resilience in...

Chemochromic Hydrogen Leak Detectors

Alternative OTEC Scheme for a Submarine Robot

A proposed system for exploiting the ocean thermal gradient to generate power would be based on the thawing-expansion/ freezing-contraction behavior of a wax or perhaps another suitable phase-change...

Compact, Single-Stage MMIC InP HEMT Amplifier

Figure 1 depicts a monolithic microwave integrated-circuit (MMIC) single-stage amplifier containing an InP-based high- electron-mobility transistor (HEMT) plus coplanar-waveguide (CPW)...