Composite paraboloid solar collector

Abstract

The invention relates to a composite paraboloid solar collector. The solar collector comprises a Fresnel reflection collecting mirror array and a solar collector body. The Fresnel reflection collecting mirror array is arranged under the solar collector body. A collector part of the solar collector body is a collector pipe, the outer wall face of the collector pipe is coated with an absorption coating, and the upper wall face of the collector pipe is a composite paraboloid composed of a heat-isolation protective layer and a secondary reflection mirror. The lower wall face of the solar collector body is composed of two layers of glass faces. The upper wall face and the lower wall face of the solar collector body define a closed cavity to form a layer of air wall. The two-layer glass design is adopted, and advantages of a composite paraboloid solar collector without heat-isolation measures and advantages of a composite paraboloid solar collector with a vacuum glass pipe are combined; under the situation that heat losses are not reduced, integration complexity of a system is effectively reduced, the structure is simple, manufacturing and operation cost is low, and safety and stability of the solar collector are improved.

Description

technical field [0001] The invention relates to a reflective heat collector device, especially a reflective heat collector device based on linear Fresnel, which is used to improve the efficiency of the heat collector and realize solar energy by reducing heat dissipation between the heat collector and the external environment. Efficient use, improve energy utilization efficiency. Background technique [0002] The global environmental degradation and energy crisis have attracted more and more attention from all mankind. At present, as far as the whole country is concerned, there is an urgent need to develop low-cost, easy-to-use renewable energy utilization technologies. Solar energy will not pollute the environment. It is one of the cleanest energy sources. This is extremely valuable in today's increasingly serious environmental pollution . [0003] China has a vast territory and abundant solar energy resources, so we should vigorously promote the use of solar energy in our...

AI Technical Summary

Problems solved by technology

Most of the receiving devices used in the current linear concentrating solar energy devices are straight-through vacuum tube type CPC reflective concentrating receiving devices. Since the outer layer of the metal receiving tube is wrapped with a layer or double-layer vacuum glass sleeve, it has small heat loss and collects light. The advantage of high thermal efficiency, but its initial cost is high, the failure rate of the vacuum tube is high, and it is easy to cause vacuum leakage

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