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plenum

plenum

1 8.6
An enclosed space above a ceiling where air has higher pressure
  • noun
  • /ˈplɛnəm/
  • Specialized
: pleno
  • This gas plenum is used to capture the fission products which are gases such that the fuel pin does not over pressurize.
  • air plenum

Examples

  • The presence of a pair of bellows made it possible to deliver an uninterrupted air supply to a moderate-size plenum chamber, the air chest.

    Academic text (2005)
  • Air was stored in a relatively large plenum chamber immersed in a water bath.

    Academic text (2005)
  • The dust collector also features a walk-in clean air plenum for easy maintenance.

    Academic text (2002)
  • Underneath the floor, there is either a plenum or a series of perforated pipes linked to the holes in the floor.

    Academic text (1998)
  • For uniform air distribution, an eight-inch high plenum was created between the bottom of the vessels and the aluminum platform used to support the filter media.

    Academic text (1997)
  • Air is blown by a fan into the plenum, or into the pipes, through the perforated floor, through the compost, and then brought back to the fan by ducting.

    Academic text (1998)
  • Circulation control blowing from a pressurized air plenum at the trailing edge of the wing can provide a high lift system with no external moving parts, thereby reducing both drag and weight.

    Academic text (2002)
  • The composting area contains integrated aeration plenums that are fed by supplemental blowers located adjacent to the paved area.

    Academic text (1999)
  • The temperature of the air directed through the plenum should preferably be several degrees cooler than ambient, but need not be so cold as to cause discomfort to the vehicular occupants in portal 10.

    Blog text (26)
  • The return air plenum must be inspected regularly to ensure proper ventilation.

Antonyms

vacuum
  • Specialized
136 4.2

A space with no air or other matter

Surface Forms

plenum singular
plenums plural

Etymology

Plenum comes from the Latin plenus meaning 'full'. In ventilation and building systems a plenum is a space that is 'full' of air under pressure before the air is sent into rooms, so the origin explains the technical meaning.