Compound parabolic condenser combining inside condensation and outside condensation

Abstract

The invention relates to the technical field of solar condensation, and provides a compound parabolic condenser combining inside condensation and outside condensation. The condenser comprises a glass tube (2), a receiving tube (1) positioned in the glass tube (2), an inside compound parabolic condenser plate (3), an outside compound parabolic condenser plate (4), a heat preservation layer (5), support feet (6) and a support beam (7), wherein the receiving tube (1) and the glass tube (2) are respectively provided with a circle centre of the receiving tube and the circle centre of the glass tube; the circle centre of the receiving tube (1) is overlapped with the circle centre of the glass tube (2); vacuum is formed between the receiving tube (1) and the glass tube (2); the inside compound parabolic condenser plate (3) is arranged and fixed in the vacuum and is contacted with the glass tube (2); and a gap is formed between the inside compound parabolic condenser plate (3) and the receiving tube (1). The condenser has the characteristics of good condensation effect and simple installation.

Description

technical field [0001] The invention relates to a solar energy utilization concentrator, in particular to a static non-imaging concentrator, which belongs to the technical field of solar energy concentration. Background technique [0002] As a clean, non-polluting renewable energy source, solar energy is considered an important part of the world's energy strategy for its development and utilization. [0003] Compound parabolic concentrator (CPC for short) is a non-imaging concentrator designed according to the principle of edge optics. In theory, the incident light within the acceptance angle range will reach the receiver directly or after reflection. For a given acceptance angle range, it can achieve the maximum concentration ratio, so it is applied in solar thermal and photovoltaic systems. In non-tracking, tracking (secondary reflector) systems. [0004] The establishment and development of the CPC model began in the late 1970s, and a large number of scholars have done ...

AI Technical Summary

Problems solved by technology

For tubular CPC, in the world, its research and utilization mainly focus on the external concentrating heat collector with the concentrating plate outside the glass tube. For this type of concentrator, there are differences due to the distance between the glass tube and the receiving tube. The gap between the concentrating plate and the receiving tube is too large, the concentrating plate is difficult to maintain, the concentrating effect is poor, and the structure is not compact.

In 1977, U.Ortabasi of Corning Glass Research and Development Laboratory proposed the method of placing the concentrating plate inside the glass tube when proposing the inner concentrating heat pipe vacuum collector, which solved the problem of external concentrating. The shortcomings of the optical method, but there are also shortcomings and limitations: due to the limitation of the diameter of the glass tube and the receiving tube, the concentration ratio is small, and the center of the receiving tube does not coincide with the center of the glass tube, resulting in difficulties in production and installation, etc.

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