A secondary concentrating reflective-transmissive parabolic trough solar collector
A solar collector and secondary concentrating technology, applied in the direction of solar collectors, solar collectors using working fluid, solar thermal energy, etc., can solve problems such as the decline in heat collection performance of trough collectors, and achieve Convenient processing, easy modification, and the effect of improving heat collection efficiency
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0026] Such as figure 2 As shown, the transmission-reflection type parabolic trough solar collector provided by the present invention includes a line-focusing Fresnel lens 1, a collimating Fresnel lens 2, a vacuum heat collecting tube 3 and a parabolic trough surface reflector 4, and sunlight Sequentially pass through the line-focusing Fresnel lens 1 and collimating Fresnel lens 2 to irradiate the parabolic trough reflector 4, be reflected by the parabolic trough reflector 4 and converge to the wall of the vacuum heat collecting tube 3, thereby improving the trough heat collection. collector efficiency.
[0027] The real focal point of the line focusing Fresnel lens 1 coincides with the virtual focal point of the collim...
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