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Dynamic Optimization of Power Flow and Electric Vehicle Resources in Smart Grid
Envision the possibility that smart electric cars cruise carefreely on the
streets without worrying the batteries running out of juice. During hot
summer days when air conditioners are running at the maximum, the
electric utility can quickly balance supply and demand, shuffle and smooth
the load to deliver power efficiently to the millions of households. The first
scenario is a system of smart mobile batteries, while the second is a smart
power system.
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Mass Transport in the Nano-structured Electrode of Polymer Electrolyte-based Fuel Cells
Concerns over climate change call for more innovative energy-conversion technologies to be
developed and adopted to reduce the negative impacts associated with conventional fossil-fuel,
combustion-based energy systems on the environment. Fuel cells have become one of the most
promising energy-conversion technologies by virtue of their high efficiency and low or zero emission
nature. However, they have yet to attain widespread appeal as their performance is still too low and
their cost too high.
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Smart Grid
Concerns with global warming prompt governments
throughout the world to pursue policies aiming at increasing
renewable energy generation so as to reduce greenhouse gases
produced by electricity generation from fossil fuels. However,
due to the intermittent characteristics of renewable energy
sources such as wind and solar power, it is a challenge for
systems with large renewable generation capacities to achieve
real-time balance between power generation and consumption,
without which power instabilities and even blackouts may
occur.
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LED Replacement Lamp Driver with Universal Compatibility
Fluorescent lamps have been widely utilized in many residential, commercial and industrial sectors as they offer high efficacy and have
proven operational stability. As they require a high voltage initially to discharge the lamp and have negative resistance, a device called
ballast is used to generate the ignition voltage and regulate the lamp current. Ballasts are of two major kinds, low-frequency electromagnetic and high-frequency electronic. Electromagnetic ballasts are made of passive components.
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Sustainable Lighting Technology: From Devices to Systems
Lighting systems consume about 18% of electricity globally. This project focuses on “sustainable lighting technology”. It clarifies the
important concept that “energy saving is not necessarily environmentally friendly”, unless the technology has long lifetime and a large
portion of the product materials is recyclable. The research team is therefore promoting a new “Sustainability” concept involving three
criteria, namely (1) energy saving, (2) long product lifetime and (3) recyclability.
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Exploiting Strain-relaxed Quantum Wells for Broadband Emission LEDs
Light, as one of the most common media of information transfer, is closely related to our daily life. From incandescent to solid-state
lighting based on light-emitting diodes (LEDs), artificial light sources keep on improving in terms of energy efficiency. Faced with
increasing energy shortages nowadays, LED technology has attracted much interest due to its significantly higher energy transfer
efficiency compared with traditional light sources. LEDs, being semiconductor devices based on the fundamental p-n junction, produce
light with the energy released during the radiative recombination processes of its carriers.
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