A solar built-in reflector and its design method

Abstract

The invention provides a solar built-in reflection plate and a design method thereof, and solves the problems that the existing light reflection plate is low in condensation rate, difficult to process and low in precision, heat absorption components are easy to damage and the like. The section of a heat absorption pipe of the solar built-in reflection plate is circular; the circle is provided with a vertical center line and a horizontal center line; the sectional shape of the reflection plate is in symmetric distribution along the vertical center line; the half symmetric structure of the sectional shape of the reflection plate is an arc-shaped curved segment; the arc-shaped curved segment comprises a plurality of arc lines which are connected with one another; the two eudipleural semi-arc-shaped curved segments are connected through a connection section; the start point at the outer end of each arc-shaped curved segment is higher than the position of the horizontal center line; a clearance is reserved between the connection section and the circular section of the heat absorption pipe. The design method of the solar built-in reflection plate comprises the steps: making a first arc; making a second arc; mirroring along the vertical center line; connecting the arc-shaped curved segments on two sides through the connection section. According to the solar built-in reflection plate, the materials are saved, the condensation rate and the reflection rate are increased, the plate intensity is enhanced, the processing precision is improved, the processing difficulty is reduced, and a heat absorption component is protected.

Description

technical field [0001] The invention belongs to the technical field of solar energy utilization, and relates to a device for concentrating and reflecting sunlight, in particular to a built-in solar reflector and a design method thereof. Background technique [0002] At present, China's solar energy heat production is developing very fast, especially its core solar vacuum heat collection tube production technology is very mature, and has reached an annual production scale of over 100 million tubes, and the annual heat collection area has reached more than 10 million square meters. The stock of vacuum heat collecting tubes has reached nearly 300 million square meters. [0003] At present, the core heat collecting components used in solar thermal are basically coaxial all-glass solar vacuum heat collecting tubes. This kind of heat-collecting element is connected by two coaxially distributed glass tubes inside and outside. The inner tube has a unique heat-absorbing film outside...

AI Technical Summary

Problems solved by technology

However, it does not take into account that in practical applications, the sharp angle at the intersection of the arcs is too high, and it is in direct contact with the heat collector. A large amount of heat generated by the heat collection is transferred to the reflector, which not only causes heat loss, but also causes the temperature of the reflector to rise. , and then it is easy to warp and deform, especially the twisting during the assembly process, which is very easy to scratch and damage the film layer of the heat absorbing body, reducing the practical effect

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