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  2. Dielectric gas - Wikipedia

    en.wikipedia.org/wiki/Dielectric_gas

    A dielectric gas, or insulating gas, is a dielectric material in gaseous state. Its main purpose is to prevent or rapidly quench electric discharges . Dielectric gases are used as electrical insulators in high voltage applications, e.g. transformers , circuit breakers (namely sulfur hexafluoride circuit breakers ), switchgear (namely high ...

  3. Seasonal thermal energy storage - Wikipedia

    en.wikipedia.org/wiki/Seasonal_thermal_energy...

    GIITS (geo interseasonal insulated thermal storage). During construction of any building with a primary slab floor, an area approximately the footprint of the building to be heated, and > 1 m in depth, is insulated on all 6 sides typically with HDPE closed cell insulation. Pipes are used to transfer solar energy into the insulated area, as well ...

  4. Thermal insulation - Wikipedia

    en.wikipedia.org/wiki/Thermal_insulation

    Thermal insulation is the reduction of heat transfer (i.e., the transfer of thermal energy between objects of differing temperature) between objects in thermal contact or in range of radiative influence. [1] Thermal insulation can be achieved with specially engineered methods or processes, as well as with suitable object shapes and materials.

  5. C4-FN - Wikipedia

    en.wikipedia.org/wiki/C4-FN

    C4-FN (C4-fluoronitrile, C4FN) is a perfluorinated compound developed as a high-dielectric gas for high-voltage switchgear. [1] It has the structure (CF 3) 2 CFC≡N, which can be described as perfluoroisobutyronitrile, falling under the category of PFAS, or per- and polyfluoroalkyl substances.

  6. Spray foam - Wikipedia

    en.wikipedia.org/wiki/Spray_foam

    Polyurethane is a closed-cell foam insulation material that initially contains a low-conductivity gas in its cells. [6] As a result of the high thermal resistance of the gas, spray polyurethane insulation typically has an initial R-value around R-3.4 to R-6.7 per inch. [6] In comparison, glass wool typically has an R-Value of only R-3 to R-4 ...

  7. FEMA trailer - Wikipedia

    en.wikipedia.org/wiki/FEMA_trailer

    The typical FEMA trailer has two propane tanks on the front of the trailer behind the master bedroom, which provide the hot water, indoor heating, and gas for the stove and oven. Running water for the trailer is usually provided by some sort of water source on the property , usually through a garden hose.

  8. Building insulation - Wikipedia

    en.wikipedia.org/wiki/Building_insulation

    By installing insulation, buildings use less energy for heating and cooling and occupants experience less thermal variability. Retrofitting buildings with further insulation is an important climate change mitigation tactic, [1] [2] especially when buildings are heated by oil, natural gas, or coal-based electricity. Local and national ...

  9. List of insulation materials - Wikipedia

    en.wikipedia.org/wiki/List_of_insulation_materials

    This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.

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