Composite multi-curved trough-type solar concentrating collector with automatic defrosting function

Abstract

The invention belongs to the technical field of solar concentration and heat utilization, and particularly relates to a composite multi-curved trough-type solar concentrating collector. According to the composite multi-curved trough-type solar concentrating collector with the automatic defrosting function, when a solar altitude is low, sunlight through a glass light inlet is reflected to a black light absorbing panel with a light trap by a half-paraboloid and a vertical reflection surface to heat air in an air heating cavity; one part of heated hot air is used for heating a glass cover plate and the other part of light enters the inner surface of a linear Fresnel condenser to ascend to the inner surface of the glass cover plate, thereby achieving the defrosting function. When the solar altitude is high, the sunlight through the glass cover plate enters the half-paraboloid and a parabolic reflector, and is converged to a fin in a glass vacuum tube receiver after being reflected to be absorbed by a heat exchange medium in a liquid channel, the sunlight through the linear Fresnel condenser is directly converged on a receiving body and two parts of converged sunlight provide the heat exchange medium with heat energy.

Description

technical field [0001] The invention belongs to the technical field of solar energy concentration and heat utilization, and in particular relates to a composite multi-curved trough type solar energy concentration heat collector. Background technique [0002] At present, most of the trough solar concentrating collectors that are popularized and used are mainly parabolic concentrating heat collectors. Its advantage is that the temperature of concentrating heat is high, but its disadvantage is that the rotation center of the concentrating collector does not coincide with the center of gravity of the whole device. It belongs to the form of "external concentrating light"; the glass vacuum tube receiver is located on the upper part of the parabolic concentrating heat collector, which is easy to form shadows on the reflective surface, which affects the concentrating efficiency of the concentrator, and the parabolic reflector is easy to fall dust, which affects the reflection effect ...

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Problems solved by technology

[0002] At present, most of the trough solar concentrating collectors that are popularized and used are mainly parabolic concentrating heat collectors. Its advantage is that the temperature of concentrating heat is high, but its disadvantage is that the rotation center of the concentrating collector does not coincide with the center of gravity of the whole device. It belongs to the form of "external concentrating light"; the glass vacuum tube receiver is located on the upper part of the parabolic concentrating heat collector, which is easy to form shadows on the reflective surface, which affects the concentrating efficiency of the concentrator, and the parabolic reflector is easy to fall dust, which affects the reflection effect ;For winter use in high latitude areas, the frost on the parabolic reflector needs to be exposed to the sun for a period of time before it can be eliminated, resulting in a shortened uptime of the concentrating collector

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