Compound parabolic condensation type heat collection and dissipation device with heat collection function at daytime and radiation refrigeration function at night
A compound paraboloid, radiative cooling technology, applied in solar collectors, solar collectors using working fluids, solar thermal energy, etc., can solve the problems of single function, reduced use efficiency, insufficient cooling power, etc. Irradiation intensity and heat collection efficiency, the effect of reducing radiant heat loss and reducing radiant cooling loss
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Embodiment 1
[0039] Such as Figures 1 to 3As shown, the compound parabolic concentrator radiator with night radiation cooling function provided by the present invention comprises a cuboid box 1 with an open top surface, the inner shape of the box 1 is a compound paraboloid, and the inside of the box 1 is a compound paraboloid concentrator. The optical device 2, the box body 1 is surrounded by metal brackets; the bottom center of the compound parabolic concentrator 2 is installed with a single-layer glass tube 3 along the length direction of the box body 1, and the outer surface of the glass tube 3 is sequentially coated with solar energy from the inside to the outside. Selective absorption coating 6 and radiation cooling coating 7, wherein the material of solar selective absorption coating 6 is blue titanium coating, and its absorption rate in the solar radiation band of 0.2 μm to 3 μm is greater than 90%, and in the solar radiation band The emissivity of other bands is less than 5%. The...
Embodiment 2
[0046] The difference from Embodiment 1 is that the solar selective absorbing coating 6 is a black chrome coating, and the rest are the same as in Embodiment 1, and will not be repeated here.
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