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The research team of Monash University in Australia has created a solar energy hydrogen production method with energy conversion efficiency breaking the world record. This method achieves a conversion rate of 22% and lays the foundation for the promotion of cheap and efficient hydrogen production technology. An important step in the production of hydrogen energy. Monash University's solar hydrogen production technology is a breakthrough in hydrogen production by photoelectrochemical decomposition.
The photoelectrochemical method of using solar light to irradiate pyrolysis water to generate hydrogen energy has attracted much attention due to its simple principle, environmentally friendly process, and high hydrogen fuel energy density. The key to this technology is the synthesis of high-efficiency, low-cost, long-life photocatalytic materials. However, due to the limitations of previous technologies and materials, the solar energy efficiency of this preparation method is relatively low.
Professor Leone Spiccia of the Monash Chemical Institute who led the scientific research team introduced the “photoelectrochemical hydrolysis method for hydrogen production is cheap, clean, and rich in sources, the latest technological breakthroughs have significantly promoted the realism of large-scale hydrogen productionâ€. Hydrogen production by chemical decomposition is a breakthrough in materials. The application of foamed nickel electrode material greatly increases the surface area of ​​the electrode, thereby effectively utilizing the energy of the spectrum of sunlight and improving the photocatalytic performance of sunlight. At the same time, the team adopted the most efficient photovoltaic panel, which greatly improved the utilization of solar photovoltaic conversion. Based on the combination of the above two points, the new technology has made the conversion efficiency of photoelectric hydrogen production reach a breakthrough of 22% of the world record. The relevant results were published in the recently published "Energy and Environmental Science" publication.
The auger bit adds a long deep spiral flute for effective chip removal.
Two styles of auger bit are commonly used in hand braces: the Jennings or Jennings-pattern bit has a self-feeding screw tip, two spurs and two radial cutting edges. This bit has a double flute starting from the cutting edges, and extending several inches up the shank of the bit, for waste removal.
The Irwin or solid-center auger bit is similar, the only difference being that one of the cutting edges has only a "vestigal flute" supporting it, which extends only about 1â„2 in (13 mm) up the shank before ending.
The diameter of auger bits for hand braces is commonly expressed by a single number, indicating the size in 16ths of an inch. For example, #4 is 4/16 or 1/4 in (6 mm), #6 is 6/16 or 3/8 in (9 mm), #9 is 9/16 in (14 mm), and #16 is 16/16 or 1 in (25 mm). Sets commonly consist of #4-16 or #4-10 bits.
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