Accession Number : ADA618149


Title :   Prediction of Long Term Degradation of Insulating Materials


Descriptive Note : Final rept.


Corporate Author : ENGINEER RESEARCH AND DEVELOPMENT CENTER CHAMPAIGN IL CONSTRUCTION ENGINEERING RESEARCH LAB


Personal Author(s) : Stephenson, L D ; Heffron, Andrew ; Mehnert, Brenda B ; Alvey, Jedediah B ; Boddu, Veera ; Gao, Elizabeth J ; Lawrence, Deborah J ; Kumar, Ashok


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a618149.pdf


Report Date : May 2015


Pagination or Media Count : 68


Abstract : Advanced insulation materials provide resistance to heat flow. Properly insulating shelters can reduce heating and cooling costs, as well as im-proves comfort. However, the long-term performance of insulation materials is relatively unknown. This research investigated the long-term performance of five commercially available insulation materials including nonwoven insulation liner, aerogel blankets, closed cell spray polyurethane foam (ccSPF), extruded polysterene (XPS), and fiberglass batt. Accelerated aging simulation experiments were conducted in an environmental chamber. All materials were subjected to 5 weeks in the chamber and exposed to various temperature and humidity conditions. Thermal conductivity using a heat flow meter apparatus (HFMA) and corresponding R-values of each material were calculated. The results indicate that moisture absorption was a major contributor to changes in the thermal properties of the materials. Additional degradation in R-values in ccSPF was caused by loss of blowing agent over time. The results of this research are expected to help formulate an accelerated aging methodology that allows reliable prediction of long-term advanced in-sulation materials performance.


Descriptors :   *INSULATION , ACCELERATED TESTING , AGING(MATERIALS) , COOLING , COSTS , HEAT TRANSFER , HEATING , HUMIDITY , THERMAL CONDUCTIVITY


Subject Categories : Mfg & Industrial Eng & Control of Product Sys


Distribution Statement : APPROVED FOR PUBLIC RELEASE