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Title: Thermally Anisotropic Composites for Improving the Energy Efficiency of Building Envelopes

Abstract

This article describes a novel application of thermal anisotropy for improving the energy efficiency of building envelopes. The current work was inspired by existing research on improved heat dissipation in electronics using thermal anisotropy. Past work has shown that thermally anisotropic composites (TACs) can be created by the alternate layering of two dissimilar, isotropic materials. Here, a TAC consisting of alternate layers of rigid foam insulation and thin, high-conductivity aluminum foil was investigated. The TAC was coupled with copper tubes with circulating water that acted as a heat sink and source. The TAC system was applied to a conventional wood-framed wall assembly, and the energy benefits were investigated experimentally and numerically. For experimental testing, large scale test wall specimens were built with and without the TAC system and tested in an environmental chamber under simulated diurnal hot and cold weather conditions. Component-level and whole building numerical simulations were performed to investigate the energy benefits of applying the TAC system to the external walls of a typical, single-family residential building.

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1570116
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Energies (Basel)
Additional Journal Information:
Journal Name: Energies (Basel); Journal Volume: 12; Journal Issue: 19; Journal ID: ISSN 1996-1073
Publisher:
MDPI AG
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; thermal anisotropy; building envelope; thermal management; energy efficiency; peak load reduction

Citation Formats

Biswas, Kaushik, Shrestha, Som S., Hun, Diana E., and Atchley, Jerald. Thermally Anisotropic Composites for Improving the Energy Efficiency of Building Envelopes. United States: N. p., 2019. Web. doi:10.3390/en12193783.
Biswas, Kaushik, Shrestha, Som S., Hun, Diana E., & Atchley, Jerald. Thermally Anisotropic Composites for Improving the Energy Efficiency of Building Envelopes. United States. doi:10.3390/en12193783.
Biswas, Kaushik, Shrestha, Som S., Hun, Diana E., and Atchley, Jerald. Sat . "Thermally Anisotropic Composites for Improving the Energy Efficiency of Building Envelopes". United States. doi:10.3390/en12193783. https://www.osti.gov/servlets/purl/1570116.
@article{osti_1570116,
title = {Thermally Anisotropic Composites for Improving the Energy Efficiency of Building Envelopes},
author = {Biswas, Kaushik and Shrestha, Som S. and Hun, Diana E. and Atchley, Jerald},
abstractNote = {This article describes a novel application of thermal anisotropy for improving the energy efficiency of building envelopes. The current work was inspired by existing research on improved heat dissipation in electronics using thermal anisotropy. Past work has shown that thermally anisotropic composites (TACs) can be created by the alternate layering of two dissimilar, isotropic materials. Here, a TAC consisting of alternate layers of rigid foam insulation and thin, high-conductivity aluminum foil was investigated. The TAC was coupled with copper tubes with circulating water that acted as a heat sink and source. The TAC system was applied to a conventional wood-framed wall assembly, and the energy benefits were investigated experimentally and numerically. For experimental testing, large scale test wall specimens were built with and without the TAC system and tested in an environmental chamber under simulated diurnal hot and cold weather conditions. Component-level and whole building numerical simulations were performed to investigate the energy benefits of applying the TAC system to the external walls of a typical, single-family residential building.},
doi = {10.3390/en12193783},
journal = {Energies (Basel)},
number = 19,
volume = 12,
place = {United States},
year = {2019},
month = {10}
}

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