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Testing and modelling of flexible air duct heat losses.

Author(s) : FRICKER J., JOHNSON P.

Type of article: Article

Summary

Too often houses with ducted systems are not cooled sufficiently in summer or heated adequately in winter because of poor equipment selection or design. One cause is underestimation of the heat gain (or loss) from flexible duct under floors or in roof spaces. The authors' research tests have found that insulated flexible air ducts may have thermal performance considerably less than expected from guarded hot plate tests of flat insulation samples because of insulation compression, lack of insulation seam overlap, or air percolation through the insulation. Using test and modelling procedures in this paper, one can now better estimate these losses and rate insulation of heating or cooling flexible air ducts more accurately. These procedures are based upon extensive flexible duct testing, modelling, and research at Enersonics Pty Ltd and James M Fricker Pty Ltd over several years.

Details

  • Original title: Testing and modelling of flexible air duct heat losses.
  • Record ID : 2009-2449
  • Languages: English
  • Source: EcoLibrium - vol. 8 - n. 2
  • Publication date: 2009/03

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