| 摘要 |
A solar energy collector 101 comprises a plurality of transparent tubes 105 connected at their ends to transverse inlet and outlet manifolds 106,107. In use, the manifolds are connected to a circulation system 111 for heat transfer liquid to be heated by the solar energy collector. The heat transfer liquid has carbon black mixed in with it, in a weight percentage of 1 %. The carbon black acts to absorb energy in incident solar radiation and transfer it to the heat transfer liquid, heating it. The heat transfer liquid is preferably one with an elevated boiling point liquid, such as glycerol. The manifolds are mounted, suitably insulated, in a case which has a window through which light can pass, the manifolds supporting the plurality of transparent tubes. Behind the tubes each has a concave channel or generally U-shaped reflector 108 with a cusp 109 centrally in the bottom of its U. The shape of the reflector is such that sunlight incident on the reflector is reflected onto the tube, without being able to pass under the tube. |
