Nano-fluid direct absorption type solar heat collector
A solar heat collector and nanofluid technology, applied in the field of solar heat collectors, can solve the problems of low heat collection efficiency and large heat loss of heat collectors, and achieve high heat collection efficiency, small heat loss, and reduced heat loss Effect
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specific Embodiment approach 1
[0009] Specific implementation mode one: the following combination figure 1 This embodiment will be specifically described. Nanofluid direct absorption solar heat collector, which includes N vacuum tubes 1, N reflectors 2, first insulation communication tube 3 and second insulation communication tube 4, N vacuum tubes 1 are arranged in a row, and the two vacuum tubes 1 Both ends are open ends, one open end of each vacuum tube 1 communicates with the first heat preservation communication pipe 3 through the rotating interface respectively, and the other opening end of each vacuum tube 1 communicates with the second heat preservation communication pipe 4 through the rotating interface respectively, the second A connecting pipe 3 communicates with the water outlet, and the second heat preservation communicating pipe 4 communicates with the water inlet. A reflector 2 is arranged under each vacuum tube 1, and the working medium in each vacuum tube 1 includes a fluid matrix. Nanopar...
specific Embodiment approach 2
[0012] Embodiment 2: The difference between this embodiment and the nanofluid direct absorption solar collector described in Embodiment 1 is that: the vacuum tube 1 is a transparent glass vacuum tube with an elliptical axial cross-sectional shape.
[0013] In this embodiment, the cross-sectional shape of the vacuum tube 1 is elliptical, the major axis of the ellipse is 40-60 mm, and the short axis is 30-50 mm. Compared with the traditional vacuum tube with a circular cross-sectional shape, In the vacuum tube 1 described in this embodiment, the long axis of the ellipse faces the sun, which can increase the heat absorption area, reduce the thickness of the liquid layer of the working medium in the vacuum tube, and improve the heat collection efficiency of the solar collector.
specific Embodiment approach 3
[0014] Specific embodiment three: the difference between this embodiment and the nanofluid direct absorption solar collector described in specific embodiments one and two is that: the mirror axial projection of the reflector 2 is a parabola, and the vacuum tube 1 The center is at the focal point of the mirror 2 .
[0015] The reflective surface of the reflector 2 described in this embodiment is a parabolic curved surface, which can reflect and converge the sunlight incident on the reflective surface to the center of the vacuum tube 1. The concave reflector is arranged below the vacuum tube 1, so that the vacuum tube The back side of 1 receives the radiation of sunlight at the same time, which improves the heat collection efficiency of the solar heat collector described in this embodiment.
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