▎ 摘　　要

NOVELTY - Fabrication of wood-based solar thermal devices involves (a) cutting a block of natural or lignin-reduced natural wood to have a surface (S1), surface (S2) opposite the surface (S1) and internal fluidic transport network comprising microstructures of natural wood between the surfaces (S1) and (S2), (b) forming solar absorption layer on at least the surface (S1) of the wood block, and (c) forming artificial holes extending from the surface (S1) to surface (S2). USE - For solar thermal heat collector device with wood-based substrate with fluidic transport. ADVANTAGE - The method has improved absorption of solar radiation by modifying block of natural wood. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the wood-based evaporator in a horizontal cut configuration with a solar absorption layer. Fluid (112) Lumen (302) Wood-based evaporator (400) Top surface (406) Bottom surface (408)