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Capacitors

Capacitors

  • Capacitors

    Type: 
    Technology
    Objective:

    Many storage technologies have been considered in the context of utility-scale energy storage systems. These include:

  • Charge Storage Device Architecture For Increased Energy And Power Density

    Type: 
    Product
    Technology:

    Electrochemical capacitors are energy storage devices that provide a high-power and lightweight alternative to rechargeable industrial batteries and backup power supplies. Furthermore the capacitors exhibit high cycling efficiency fast recharge capability and reliable cold temperature performance. However current electrochemical capacitors are limited by their relatively low energy densities.

  • Charge Storage Device Containing Carbon Nanotube Films

    Type: 
    Product
    Technology:

    Some charge storage devices such as supercapacitors and batteries require high surface area materials that form a double layer with an electrolyte. These materials which serve as the electrode can be carbonaceous materials such as carbon black or carbon nanotubes but must also be interfaced with metal charge collectors resulting in a multi-layer structure. Such a structure often has problematic interfaces between the carbon and metals and due to the metal charge collectors such super-capacitors and batteries cannot be fabricated in a simple room-temperature process.

  • Supported Catalysis For In Situ Synthesis Of High Energy Density Nanocomposites

    Type: 
    Product
    Technology:

    Future pulsed-power capacitors will require dielectric materials having very large energy densities with operating voltages > 10 kV. The operating characteristics of current state-of-the-art pulsed-power capacitors which utilize either ceramics or polymers as dielectric materials fall significantly short of this goal. To address this researchers at Northwestern University have developed nanocomposites that combine inorganic constituents and polymer matrices.

  • Fuel-Powered Artificial Muscles

    Type: 
    Product

    Background: While traditional electronic robots and artificial limbs have become increasingly sophisticated and athletic they employ purely electrical actuators which are wired to and thus anchored to large stationary power supplies. Though batteries can be used for these applications they store too little energy and deliver it at too low a rate for prolonged intense and autonomous activity. Therefore there is increased necessity for alternative more energy efficient actuators which will be the essential for the future of prosthetics and autonomous robots.

  • Low-Power Area-Efficient SAR ADC

    Type: 
    Product
    Technology:

    Background: In the monitoring of neural activity simultaneous real-time monitoring of multiple neural sites in 3 dimensional electrode arrays is ideal. Towards this end recent development in neural probes includes the implementation of multichannel neural interface systems. In microsystems the neural signals are often amplified and converted into digital signals for transmission via wired/ wireless communication channels between the implanted system and the external world.

  • Operación de equipo de aire acondicionado tipo split con hidrocarburos Una guía de reconversion para técnicos, instructores e ingenieros de refrigeración

    Type: 
    Publication
    Publication date:
    Objective:

    This conversion guide is intended to assist with the safe conversion of air conditioning systems to use flammable hydrocarbon (HC) refrigerants. Converting an air conditioning system from a non-flammable to a flammable refrigerant requires special considerations, which are summarised here.

  • High Power Density Switched-Capacitor Converter for Offshore Wind Energy Systems

    Type: 
    Product
    Technology:

    North Carolina State University is currently seeking an industry partner to further develop and commercialize the novel High Power Density Switched-Capacitor Converter. Abstract: To tap the wind potential and to run the grid solely on HVDC a DC-DC converter is used to convert the low voltage rectified output of the wind turbine to high voltages.This new family of step-up SC converter can significantly reduce the required filter capacitors in switched-capacitor converter leading to high power density and reduced cost.