Abstract
Cross-laminated timber (CLT) is a structural timber developed for low-grade timber utilization. This study analyzed the thermal properties of Ply-lam CLT using Korean plywood as a core material of CLT and analyzed the cooling and heating energy demands of wooden house with Ply-lam CLT. The thermal conductivity of Ply-lam CLT was measured by TCi thermal conductivity measurement equipment. The overall thermal conductivity of the five-layer Ply-lam CLT was calculated using KS M ISO 6946. The cooling and heating energy demands of the wooden houses with Ply-lam CLT were analyzed using Passive House Planning Package (PHPP), a building energy analysis program based on ISO 13790. The thermal conductivity of Ply-lam CLT was lower than that of existing CLT consisting of five-layered larch. In addition, it was confirmed that the heat insulating performance of CLT can be further improved according to the application site and thickness of the plywood board. The CLT applied wall reduces the cooling and heating energy demands because of reduce the thermal bridge and infiltration in the wall. Finally, considering both the amount of cooling and heating energy demand reduction and the wall thickness increase, it is considered that the wall with the passive house level (0.15 W/m2K) applied the Ply-lam CLT board is most suitable among 7 wall cases.
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