| 摘要 |
<p>The collector has an outer transparent tube body (1) traversed by solar rays and an inner absorber tube body (2) having a ray receptor surface transmitting heat by conduction or reflection to the heat carrying fluid (3) which carries the heat gained to a storage reservoir. Receptor winglets (4) are made of material that changes shape at a given temperature to modify the useful collector surface and return to their original shape when the temperature falls to its original value. The material can be a memory type alloy, a bimetallic strip or switch or a double plastics leaf.</p> |
