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Minimum outside air control methods for variable air volume systems.

Author(s) : ELOVITZ D. M.

Summary

Maintaining a constant amount of minimum outside air was not a problem with constant-volume systems as long as the minimum position control was adjusted properly and no one changed it. Variable air volume systems introduced a new level of complication because mixing-box damper pressure drops varied as supply airflow changed. The equations did not change; the laws of physics still work the same way. Designers have used a variety of strategies to maintain the desired minimum outside air ventilation quantity, with varying degrees of success, but the proponents of each approach claim to have made that approach work successfully in the field.

Details

  • Original title: Minimum outside air control methods for variable air volume systems.
  • Record ID : 1996-3630
  • Languages: English
  • Source: ASHRAE Transactions.
  • Publication date: 1995/06/24
  • Document available for consultation in the library of the IIR headquarters only.

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