An Airfoil Linear Fresnel Focusing System

Abstract

The invention belongs to the related technical field of solar concentrating technology, and more specifically relates to an airfoil linear Fresnel concentrating system. The system includes a reflector, four Fresnel lenses and a heat collecting tube, the four Fresnel lenses are arranged above the heat collecting tube, the angle between the first Fresnel lens and the second Fresnel lens is an obtuse angle, The second Fresnel lens is placed horizontally, the third Fresnel lens and the fourth Fresnel lens are mirror-symmetrical to the first Fresnel lens and the second Fresnel lens with respect to the vertical center line of the heat collecting tube, four pieces The Fresnel lens is used to focus the incident light onto the heat collecting tube, and the two reflectors are symmetrically arranged under the heat collecting tube with respect to the vertical centerline of the heat collecting tube, which is used to refract the light through the Fresnel lens but not focus on the heat collecting tube. The light on the heat pipe is reflected on the heat collecting tube. Through the present invention, the reflectivity at the edge of the Fresnel lens is reduced, the uniformity of light collection is improved, and the risk of efficiency and safety problems caused by uneven heat collection is reduced.

Description

technical field [0001] The invention belongs to the related technical field of solar concentrating technology, and more specifically relates to an airfoil linear Fresnel concentrating system. Background technique [0002] The solar thermal power generation system gathers the scattered solar radiation to the surface of the heat collecting device through the concentrator, heats the heat transfer working fluid in the heat collecting device, and then uses the heat of the working fluid to drive the steam turbine to generate electricity. Solar thermal power generation has the advantages of stable power generation and low operating costs, and has a good application prospect. As an important part of the solar thermal power generation system, linear Fresnel thermal power generation uses Fresnel lenses or reflectors to gather sunlight. It has a simple structure, easy installation and disassembly, small footprint, and low initial investment. It is the future trough solar energy An eff...

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Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides an airfoil linear Fresnel concentrating system, through the design of the focus of the Fresnel lens prism and the position setting of the reflector, the light can be completely focused to the concentrator On the heat pipe, and uniformly focused on the heat collector tube, it not only reduces the reflectivity at the edge of the Fresnel lens, but also does not cause a substantial increase in lens cost; compared with other Fresnel lens concentrator design methods, Improves the uniformity of light concentration of the concentrator, reducing the risk of efficiency problems and safety problems caused by uneven heat collection

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