A kind of manufacturing method of linear Fresnel solar concentrating heat collector

Abstract

The invention discloses a linear Fresnel solar collector which comprise a lower bracket, a vacuum collector pipe, a copper collector pipe, an upper bracket and Fresnel lens. The vacuum collector pipe is fixedly erected to the upper end of the lower bracket; the Fresnel lens are fixedly mounted to the upper bracket; the vacuum collector pipe is covered by the upper bracket which can oscillate; the copper collector pipe is mounted inside the vacuum collector pipe; the vacuum collector pipe is a one-way transparent structure with an opening, and focus of the Fresnel lens is located on the copper collector pipe; the copper collector pipe is a U-type structure, with the U surface set vertically. The invention further provides a manufacturing method, 1, establishing a two-dimensional x-y rectangular coordinate system; 2, installing the vacuum collector pipe to the focal line of the linear Fresnel lens; 3, installing a parabolic reflector inside the vacuum collector pipe; 4, setting a copper collector pipe vertically at the central axis of the vacuum collector pipe; the invention has the advantages of a rational structure, high use rate of solar energy, and high safety and reliability.

Description

technical field [0001] The invention belongs to the technical field of solar heat utilization, and relates to a manufacturing method of a solar concentrating heat collector, in particular to a manufacturing method of a linear Fresnel solar concentrating heat collector. Background technique [0002] Linear Fresnel solar concentrating collectors use linear Fresnel lenses to focus solar energy into lines, and use heat transfer fluids such as heat transfer oil, water or water vapor in vacuum heat collecting tubes to absorb the heat of solar energy to collect and utilize solar energy . The existing solar concentrators are mainly divided into two types according to the structure: one is tracking-free type, and the other is tracking type. The Fresnel linear Fresnel lens of the tracking-free linear Fresnel solar collector does not automatically adjust the angle with the change of the sunlight irradiation angle, and can only concentrate light for a certain period of time. The absor...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the unreasonable structural layout of the heat-collecting copper tubes of the existing trackable linear Fresnel solar concentrating heat collectors, and the uneven solar flux density on the wall surface of the heat-collecting copper tubes, which makes the temperature gradient of the wall surface relatively small. The problem of low heat collection efficiency and poor safety of vacuum heat collection tubes is caused by large vacuum heat collection tubes, and a method for manufacturing linear Fresnel solar concentrators with reasonable structure, high solar energy efficiency, safety and reliability is provided

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