![]() The results show that after placing carbon nanotubes (CNTs) on DL-wood, the efficiency of steam production is higher than that of natural wood coated with CNTs by 20% under ambient sunlight conditions. This research demonstrates that delignified wood (DL-wood) can further improve the efficiency of steam generation via increasing both the water transportation and water evaporation. Although tremendous efforts have been made to improve wood-based solar steam generation devices, they mainly have focused on the optimization of photothermal materials to optimize light absorbability and thermal management to enhance efficiency of steam generation. Wood-based solar steam generation holds great promise in alleviating fresh water crises due to its advantages: light absorbability, thermal management, water transpiration, and water evaporation. More uniform plasticization results in less breakage of the wood. ![]() Vacuum steam technology offers a promising method that utilizes pressure differentials to accelerate the addition of steam to wood due to water vapor bulk flow and subsequently an accelerated temperature rise. Applications using conventional atmospheric steaming can be time consuming, non-uniform, and can result in failures. Steaming at atmospheric pressure is common, wherein diffusion prevails as the predominant mechanism governing moisture movement. Steamed wood is less rigid, since adding moisture and heat to wood results in plasticization. Fishing hooks, barrel staves, and planks turned into boat hulls are examples. Bending drier wood with the help of heat and water is centuries old. ![]() When wood has been separated from the tree and dried it is more rigid, difficult to bend, and breakable. Fresh growth willow twigs are readily bent into practically any shape. Bending wood dates back to antiquity in the form of baskets from willow branches. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |