Solid wood impregnated with a bio-based phase change material for low temperature energy storage in building application

Abstract Wood impregnated with a multicomponent mixture of fatty acids as bio-based phase change material (BPCM) to improve its thermal characteristics was studied. The studied wood/BPCM composites can be used internal elements in buildings for energy storage. Scots pine and beech sapwood were linoleic acid coconut oil at ratio 20:80. Leakage test conducted revealed that the maximum leakage 9 8%, respectively. Light microscopy employed demonstrate distribution BPCM wood structure. Rays both served pathways impregnation partly fill tracheid lumens (pine) vessels (beech). Thermal characterization samples T-history DSC methods, concluding had significant mass, ability store excessive terms latent heat keep temperature constant long time. specific capacity 4–5 J g ?1 K i.e., higher than untreated control ca. 2 . conductivity before after measured using flow meter method results showed compared parameter improved when cell filled BPCM. 80% mass percentage gain (MPG) demonstrated an increment 33% while 43 38% MPG increase 8 11%,