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  2. Fill power - Wikipedia

    en.wikipedia.org/wiki/Fill_power

    A thicker layer of trapped air gives more insulation. This thickness is often called "loft." A comforter that uses 550 fill power down, for example, would have to use approximately 40%-50% greater weight of down than a similar item that uses 800 fill power down to provide the same loft.

  3. Overhead power line - Wikipedia

    en.wikipedia.org/wiki/Overhead_power_line

    An overhead power line is a structure used in electric power transmission and distribution to transmit electrical energy along large distances. It consists of one or more conductors (commonly multiples of three) suspended by towers or poles.

  4. List of countries by tax rates - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by_tax_rates

    0% (free zone companies, [239] as well as mainland companies with less than 375,000 AED a year in profit, [240] may need to fill out a tax return) 9% (for mainland companies with a net profit over AED 375,000 annually, taxation paid to other countries credited towards UAE taxation, tax return required) [ 240 ]

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  6. Solar-cell efficiency - Wikipedia

    en.wikipedia.org/wiki/Solar-cell_efficiency

    The fill factor is directly affected by the values of the cell's series, shunt resistances and diodes losses. Increasing the shunt resistance (R sh ) and decreasing the series resistance (R s ) lead to a higher fill factor, thus resulting in greater efficiency, and bringing the cell's output power closer to its theoretical maximum.

  7. Heat recovery ventilation - Wikipedia

    en.wikipedia.org/wiki/Heat_recovery_ventilation

    Diagramatic operation of a thermal wheel Ljungström Air Preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...

  8. Waste-to-energy - Wikipedia

    en.wikipedia.org/wiki/Waste-to-energy

    The US Air Force once tested a Transportable Plasma Waste to Energy System (TPWES) facility (PyroGenesis technology) at Hurlburt Field, Florida. [40] The plant, which cost $7.4 million to construct, [41] was closed and sold at a government liquidation auction in May 2013, less than three years after its commissioning. [42] [43] The opening bid ...

  9. Renewable energy in the United States - Wikipedia

    en.wikipedia.org/wiki/Renewable_energy_in_the...

    [40] The United States has the potential of installing 10 terawatt (TW) of onshore wind power and 4 TW of offshore wind. [41] The U.S. Department of Energy's report 20% Wind Energy by 2030 envisioned that wind power could supply 20% of all the country's electricity, which included a contribution of 4% from offshore wind power. [39]