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  2. Thermal cutoff - Wikipedia

    en.wikipedia.org/wiki/Thermal_cutoff

    Two thermal switches (Thermal Cut) Schematic symbol for a thermal overload switch A thermal switch (sometimes thermal reset or thermal cutout (TCO)) is a device which normally opens at a high temperature (often with a faint "plink" sound) and re-closes when the temperature drops.

  3. R-value (insulation) - Wikipedia

    en.wikipedia.org/wiki/R-value_(insulation)

    However, R-value is widely used in practice to describe the thermal resistance of insulation products, layers, and most other parts of the building enclosure (walls, floors, roofs). Other areas of the world more commonly use U-value/U-factor for elements of the entire building enclosure including windows, doors, walls, roof, and ground slabs. [27]

  4. TRU Simulation + Training - Wikipedia

    en.wikipedia.org/wiki/TRU_Simulation_+_Training

    TRU Simulation + Training (TRU, usually pronounced as in "true") is an American manufacturer of flight simulators and training devices for civil and military markets. It is a subsidiary of Textron and was formed in 2014 when previously acquired simulator manufacturers Mechtronix and OPNICUS were merged with part of Textron Systems division.

  5. Door - Wikipedia

    en.wikipedia.org/wiki/Door

    High-speed doors are made to handle a high number of openings, generally more than 200,000 a year. They must be built with heavy-duty parts and counterbalance systems for speed enhancement and emergency opening function. The door curtain was originally made of PVC, but was later also developed in aluminium and acrylic glass sections.

  6. Thermal expansion valve - Wikipedia

    en.wikipedia.org/wiki/Thermal_expansion_valve

    A thermal expansion valve is a key element to a heat pump; this is the cycle that makes air conditioning, or air cooling, possible.A basic refrigeration cycle consists of four major elements: a compressor, a condenser, a metering device and an evaporator.

  7. Thermal wheel - Wikipedia

    en.wikipedia.org/wiki/Thermal_Wheel

    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. Shop-replaceable unit - Wikipedia

    en.wikipedia.org/wiki/Shop-Replaceable_Unit

    A shop-replaceable unit (SRU) or shop-replaceable component (SRC) is a modular component of an airplane, ship or spacecraft that is designed to be replaced by a technician at a backshop.

  9. Through-hole technology - Wikipedia

    en.wikipedia.org/wiki/Through-hole_technology

    Through-hole (leaded) resistors. In electronics, through-hole technology (also spelled "thru-hole") is a manufacturing scheme in which leads on the components are inserted through holes drilled in printed circuit boards (PCB) and soldered to pads on the opposite side, either by manual assembly (hand placement) or by the use of automated insertion mount machines.