Stainless steel straight-through type medium-temperature heat collector

Abstract

The invention relates to the field of medium-temperature solar heat collectors, in particular to a stainless steel straight-through type medium-temperature heat collector. The advantage of light gathering of a composite paraboloid CPC reflector plate and the advantage of heat collecting of a medium-temperature pipe are integrated, and the temperature can reach 200 DEG C. In addition, through the design of stainless steel pipes, flow resistance is reduced, compared with a U-shaped pipe type medium-temperature pipe heat collector, the stainless steel straight-through type medium-temperature heatcollector is more suitable for the large-area solar project, and probability of freezing blockage and overheating is reduced. The stainless steel straight-through type medium-temperature heat collector can be widely applied to the solar medium-temperature industry and agriculture projects.

Description

Technical field [0001] The invention relates to the field of medium-temperature solar heat collectors, in particular to a stainless steel straight-through medium-temperature heat collector. Background technique [0002] my country's solar thermal application product production capacity and application scale rank first in the world. In recent years, with the steady progress of the government's energy conservation and emission reduction work, the market demand for solar medium-temperature thermal energy in industrial and heating fields has shown a continuous growth trend . At present, medium-temperature collectors are divided into two categories, one is small trough collectors, and the other is CPC medium-temperature collectors. Small trough collectors are relatively large in weight and volume, mainly composed of trough reflectors, vacuum tubes, tracking devices and brackets. They follow light tracking and have poor accuracy and stability; the other type is U-tube non-tracking type...

AI Technical Summary

Problems solved by technology

The small trough collector has a relatively large weight and volume, and is mainly composed of a trough reflector, a vacuum tube, a tracking device and a bracket. It tracks with the light, and the accuracy and stability are relatively poor; the other type is the U-tube non-tracking type The medium-temperature solar collector is composed of a header, a vacuum tube, a U-shaped flow channel, and a small reflector. The inside of the vacuum tube is a U-shaped copper tube wrapped with aluminum fins. Secondary heat exchange is required between the copper and aluminum, and the copper tube Smaller tube diameter is prone to oxidation, and has disadvantages such as low concentration ratio, low flow rate, and insufficient temperature output.

At present, the two types of medium-temperature collectors cannot fully meet the needs of medium-temperature commercial and industrial and agricultural applications.

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