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  2. Citicorp Center engineering crisis - Wikipedia

    en.wikipedia.org/wiki/Citicorp_Center...

    [21] [26] With the tuned mass damper active, LeMessurier estimated that a wind capable of toppling the building had a one in fifty-five chance of happening any year. [27] [21] But if the tuned mass damper could not function due to a power outage, a wind strong enough to cause the building's collapse had one chance in sixteen of happening any ...

  3. Refrigerator - Wikipedia

    en.wikipedia.org/wiki/Refrigerator

    Food in a refrigerator with its door open. A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]

  4. Register (air and heating) - Wikipedia

    en.wikipedia.org/wiki/Register_(air_and_heating)

    A floor register. A register is a grille with moving parts, capable of being opened and closed and the air flow directed, which is part of a building's heating, ventilation, and air conditioning (HVAC) system. The placement and size of registers is critical to HVAC efficiency. Register dampers are also important, and can serve a safety function.

  5. Lambda point refrigerator - Wikipedia

    en.wikipedia.org/wiki/Lambda_point_refrigerator

    A lambda point refrigerator is a device used to cool liquid helium, typically around a superconducting magnet or for low temperature measurements, from approximately 4.2 K to temperatures near the lambda point of helium (approximately 2.17 K), the temperature at which normal fluid helium (helium I) transitions to the superfluid helium II.

  6. Damper (flow) - Wikipedia

    en.wikipedia.org/wiki/Damper_(flow)

    This damper can switch the electrical power to control additional "slave" dampers, minimizing the electrical load on the damper's control circuitry and power transformer. A zone damper (also known as a Volume Control Damper or VCD) is a specific type of damper used to control the flow of air in an HVAC heating or cooling system. In order to ...

  7. Tuned mass damper - Wikipedia

    en.wikipedia.org/wiki/Tuned_mass_damper

    Tuned mass damper inside the bridge deck of the Jan Linzelviaduct , The Hague [4] The tuned mass damper is widely used as a method to add damping to bridges. One use case for tuned mass dampers in bridges is to prevent large vibrations due to resonance with pedestrian loads. [5]