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Dynamic insulation : Analysis and field measurements

Wallentén, Petter LU (1996)
Abstract (Swedish)
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
alternative title
Dynamic insulation : Analysis and field measurements
publishing date
type
Book/Report
publication status
published
subject
keywords
HEAT TRANSFER, Building energy performance, dynamic insulation, field measurements
pages
88 pages
publisher
Department of Building Science, Lund Institute of Technology
ISBN
ISSN 1103-3034
language
English
LU publication?
yes
id
09db31b9-eef3-4b77-b72d-5496ba175feb
date added to LUP
2017-06-13 14:00:50
date last changed
2017-06-16 07:51:51
@techreport{09db31b9-eef3-4b77-b72d-5496ba175feb,
  abstract     = {A nonlinear least squares method for continuous measurement of<br/>the air flow in a 'dynamic insulation' was presented. The method<br/>is called the gradient method to indicate that the temperature gradients<br/>in the insulation are used. The method includes one dimensional<br/>transient and steady state calculations ofthe heat transfer in<br/>the insulation. The model was verified by analytical and numerical<br/>simulations. With the use of this method the air flow through an<br/>insulation was continually measured in a single storey one family<br/>house with a living area of 116 m2 during one year (1993). The house<br/>was built at Dalby, Sweden which has a yearly average temperature<br/>of 7.8 C. The exhaust ventilation was about 53 l/s. The air flow<br/>through the dynamic insulation as measured by the gradient method<br/>was 21 l/s or 4O % of t]ne total inlet air. The measurements showed a<br/>slightly higher air flow during the spring that during the autumn.<br/>This result corresponds well with laboratory measurements performed<br/>by Roots (1994) where 50 % of the inlet air passed through<br/>the insulation.},
  author       = {Wallentén, Petter},
  institution  = {Department of Building Science, Lund Institute of Technology},
  isbn         = {ISSN 1103-3034},
  keyword      = {HEAT TRANSFER,Building energy performance,dynamic insulation,field measurements},
  language     = {eng},
  month        = {03},
  pages        = {88},
  title        = {Dynamic insulation : Analysis and field measurements},
  year         = {1996},
}