Dynamic insulation: Analysis and field measurements

Research output: Book/ReportReport


A nonlinear least squares method for continuous measurement of
the air flow in a 'dynamic insulation' was presented. The method
is called the gradient method to indicate that the temperature gradients
in the insulation are used. The method includes one dimensional
transient and steady state calculations ofthe heat transfer in
the insulation. The model was verified by analytical and numerical
simulations. With the use of this method the air flow through an
insulation was continually measured in a single storey one family
house with a living area of 116 m2 during one year (1993). The house
was built at Dalby, Sweden which has a yearly average temperature
of 7.8 C. The exhaust ventilation was about 53 l/s. The air flow
through the dynamic insulation as measured by the gradient method
was 21 l/s or 4O % of t]ne total inlet air. The measurements showed a
slightly higher air flow during the spring that during the autumn.
This result corresponds well with laboratory measurements performed
by Roots (1994) where 50 % of the inlet air passed through
the insulation.


Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Physics Topics
  • Building Technologies
  • Energy Systems


Translated title of the contributionDynamic insulation: Analysis and field measurements
Original languageEnglish
Place of PublicationLund
PublisherDepartment of Building Science, Lund Institute of Technology
Commissioning bodyByggforskningsrådet (BFR)
Number of pages88
VolumeTABK 96/3034
ISBN (Print)ISSN 1103-3034
Publication statusPublished - 1996 Mar 1
Publication categoryResearch

Total downloads

No data available