Visit the Energy Systems Laboratory Homepage.
Modeling of Residential Attics with Radiant Barriers
Abstract
This paper gives a summary of the efforts at
ORNL in modeling residential attics with radiant
barriers. Analytical models based on a system of
macroscopic heat balances have been developed.
Separate models have been developed for horizontal
radiant barriers laid on top of the insulation, and
for radiant barriers attached to the bottom of the
top chords of the attic trusses. The models include
features such as a radiation interchange analysis
within the attic space, convective coupling with the
ventilation air, and sorption/desorption of moisture
at surfaces facing the attic enclosure. The paper
gives details of the models and the engineering
assumptions that were made in their development.
The paper also reports on the status of efforts that
are underway to verify the models by comparing their
predictions with the results of laboratory and field
tests on residential attics and test cells, both
with and without radiant barriers. Comparisons are
given for a number of selected sets of experimental
data. Suggestions are given for needed model
refinements and additional experimental data. Plans
for utilization of the models for extrapolation to
seasonal and annual performance in a variety of
climatic conditions are also described.
Citation
Wilkes, K. E. (1988). Modeling of Residential Attics with Radiant Barriers. Energy Systems Laboratory (http://esl.tamu.edu); Texas A&M University (http://www.tamu.edu). Available electronically from https : / /hdl .handle .net /1969 .1 /6529.