| 摘要 |
<p>Ventilation air for a building is preheated by providing on a south facing wall 10 a sunlight-absorbent corrugated collector panel 16 with the corrugations vertical, thus defining vertical channels 18 between the panel 16 and the wall 10, and vertical grooves 20 on the exterior of the panel. Outside air passing upwardly along the channels 18 is heated by a combination of solar heat from the panel 16 and heat being lost from the interior of the building through the wall 10. Air passing upwardly along the grooves 20 is heated by solar heat from the panel 16. The thus heated air is withdrawn from the channels 18 and grooves 20 and expelled into the interior of the building.</p> |
