| 摘要 |
The air used is heated in a solar heat absorption unit fitted beneath an e.g. corrugated, light-permeable sheet and placed on the roof or wall of the corresp. building. Air is allowed to flow in channels between the sheet and absorption unit, and passes it because of vacuum in the channel system (5). This vacuum is produced by a fan unit (4) positioned in the channel, and which passes on the heated air via the channel to the exposed sawdust. |
