| 摘要 |
A kiln (10) for drying a charge of lumber (12) using air heated by solar radiation (14) includes a housing (16) having a longitudinal wall (18) extending between end walls (20) and providing opposite sides (24, 26) and a roof (28) to define an enclosed drying chamber (30) within which the charge (12) is able to de dried. The wall (18) is formed by spaced apart first, second and intermediate layers (38, 40, 42), the first layer (38) located inwardly of the second layer (42), and the intermediate layer (40) located between the first and second layers (38, 42). Air is able to be heated between the first and intermediate layers (38, 40) by solar radiation (14) passing through the intermediate and second layers (40, 42) and then fed back into the drying chamber (30), while air in the space between the intermediate and second layers (40, 42) acts to thermally insulate the air between the first and intermediate layers (38, 40). |
