| 摘要 |
A solar collector 10, for heating fluid with electromagnetic radiation, comprises a fluid conveying means for conveying fluid, where the fluid conveying means comprises at least one tube 20, and a reflector 12 arranged to reflect light onto a focal point 30. The fluid conveying means is arranged in association with the reflector such that the focal point lies inside the fluid conveying means, but the fluid conveying means is asymmetrical about the focal point. In a further aspect, a solar collector comprises a reflector arranged to reflect light onto a fluid conveying means, where the fluid conveying means is elongate in cross-section and is arranged in association with the reflector such that the direction of elongation in cross-section extends in a direction away from the reflector. Preferably, the reflector is a Fresnel reflector or a parabolic reflector. The fluid conveying means may comprise a flattened tube arranged in a serpentine layout or a plurality of tubes (40, fig.6) arranged in a stack. Preferably, the reflector includes a protruding ridge 18, formed at the deepest part of the concave cross-section of the reflector, to ensure that solar radiation cannot pass underneath the fluid conveying means without being absorbed. |
