Thermally Anisotropic Composites for Improving the Energy Efficiency of Building Envelopes

Biswas, Kaushik; Shrestha, Som; Hun, Diana; Atchley, Jerald

doi:10.3390/en12193783

Thermally Anisotropic Composites for Improving the Energy Efficiency of Building Envelopes

Journal Article · Sat Oct 05 00:00:00 EDT 2019 · Energies

DOI:https://doi.org/10.3390/en12193783· OSTI ID:2376253

; ; Hun, Diana; Atchley, Jerald

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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2376253

Alternate ID(s):: OSTI ID: 1570116

Journal Information:: Energies, Journal Name: Energies Journal Issue: 19 Vol. 12; ISSN 1996-1073; ISSN ENERGA

Publisher:: MDPI AGCopyright Statement

Country of Publication:: Switzerland

Language:: English

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