NUMERICAL ANALYSIS ON THERMAL PERFORMANCE OF TRAILER HOUSE COMPOSITE ENVELOPE USING VACUUM INSULATION PANELS

摘要

Due to distinguished thermal performance of vacuum insulation panels (VIPs), i.e. the thermal conductivityrnis approximately 5-10 times lower than that of traditional thermal insulation material, it has been widelyrnapplied for energy conservation purpose, especially as building envelope. To research the thermalrncharacteristic of VIPs composite envelope for trailer house, the VIPs are employed, based on the climaterncharacteristics of the cold zone, and three typical models, namely, the interior adiabatic, sandwich andrnexterior adiabatic models are constructed. The physical and mathematic models are developed and thernnumerical comparative analysis of the thermal performance is made under the lager temperature differencerncondition. Compared among those constructions with the same continuous temperature waves, the dampingrnfactor, the delay time, the temperature vibration of interior wall surface, heat transfer flux and the thermalrnbridge are theoretically analyzed. The results of the simulation imply that, interior adiabatic model of thernVIPs composite envelope is the best for the energy conservation, especially in thermal bridge region,rnreduction the range of the interior temperature fluctuation, radiation thermal cool sensation and improvementrnthermal comfort index.rnThe research work provides the theoretical foundation for the VIPs development and application in buildingrncontracture.