Fresnel polar-shaft type fixed-focus light-gathering device and guide-rod design method thereof

Abstract

The invention discloses a Fresnel polar-shaft type fixed-focus light-gathering device and a guide-rod design method thereof. The Fresnel polar-shaft type fixed-focus light-gathering device comprises a Fresnel lens, a first seasonal manual-adjustment guide rod, a second seasonal manual-adjustment guide rod, a third seasonal manual-adjustment guide rod, supporting rods, a transverse shaft, a polar shaft, a polar-shaft tracking rotating control system and a base support. The polar-shaft tracking rotating control system is arranged on the base support, the polar shaft is rotationally arranged on the base support, one end of the polar shaft is connected with a rotating shaft of the polar-shaft tracking rotating control system, and the other end of the polar shaft is perpendicularly fixed to the midpoint of the transverse shaft. One ends of the three supporting rods are fixed to the two ends and the midpoint of the transverse shaft respectively, and the other ends of the three supporting rods are fixedly connected with the first seasonal manual-adjustment guide rod, the second seasonal manual-adjustment guide rod and the third seasonal manual-adjustment guide rod respectively. A frame of the Fresnel lens is provided with three clips, wherein the three clips can slide and be clamped to the first seasonal manual-adjustment guide rod, the second seasonal manual-adjustment guide rod and the third seasonal manual-adjustment guide rod in a positioned mode respectively. The Fresnel polar-shaft type fixed-focus light-gathering device and the guide-rod design method of the Fresnel polar-shaft type fixed-focus light-gathering device solve technical problems of fixed-focus light gathering of the Fresnel lens.

Description

technical field [0001] The invention belongs to the technical field of solar energy development and utilization, and relates to a solar concentrating device and a guide rod shape design method thereof, in particular to a Fresnel lens concentrating device which adopts polar axis tracking and can realize fixed focus concentrating and its A geometrical drawing design method for the shape and position of guide rods. Background technique [0002] Due to the low energy density of solar energy radiated to the earth's surface, the key to economical and efficient utilization of solar energy lies in the pros and cons of solar concentration and tracking. The use of concentrators can increase the energy density per unit area irradiated by the sun, thereby overcoming the shortcomings of solar energy dispersion. Generally speaking, there are mainly two types of concentrators that can be used to improve solar energy utilization: reflective and refracting, and the tracking methods of conce...

AI Technical Summary

Problems solved by technology

[0003] At present, there is a Fresnel lens focusing method based on the principle of refraction and transmission in solar energy concentration utilization. This method has a high energy conversion rate for solar energy utilization and can concentrate light downwards, but there are also shortcomings. , must follow the sun in all directions, so the tracking structure is very complicated and the cost is high, which is difficult to be accepted by users

Chinese Patent No. 200410020974.2, titled "Plastic Transmissive Solar Concentrator", discloses a spherical Fresnel lens solar concentrator spliced ​​by plastic curved concentrating panels made by mirror block division method, which can realize Concentrating large-area Fresnel lenses, but using dual-axis tracking control of latitude and longitude, the tracking control is more complicated, and the focus point is not fixed, the focus point must move together with the condenser, which requires a relatively large installation at the focus point The solar concentrating system of complex and connected equipment is limited, and these equipment are also a heavy burden on the tracking system, which increases the power and energy consumption of the tracking power

Chinese Patent Application No. 201010240479.8, titled "A Fixed-Focus Dish Solar Concentration Device" discloses a fixed-focus dish-type solar concentrator, which can achieve fixed-focus concentrating through manual adjustment and polar axis step-rotation control. Light, but the focusing mirror it uses is based on the dish-shaped arc-shaped concave surface of reflection and concentrating, which concentrates light upwards, and the larger heat-using equipment just blocks the central part of the incident beam, thus affecting its concentrating effect

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