| 摘要 |
<p>An energy conversion device is disclosed. The energy conversion device includes roofing material having a covered channel through which fluid can flow. The covered channel may be formed within the roofing material, formed within a panel that is bonded to the roofing material, or formed by a panel having an open channel bonded to the roofing material. The channel is configured such that the cross sectional area of the channel divided by the length of a perimeter of the cross section of the channel is less than 8 mm.</p> |
