Solar spotlighting and heat collection device with equal reception and escape half angles

Abstract

The invention discloses a solar spotlighting and heat collection device with equal reception and escape half angles. The device comprises a Fresnel lens, a transparent cover plate, a reflection component, a heat collection tube, a heat collection tube support component and a base, wherein the reflection component comprises a north composite plane reflector and a south composite plane reflector; the north composite plane reflector is designed according to a north CPC; the south composite plane reflector is designed according to a south CPC; and the north composite plane reflector and the southcomposite plane reflector are asymmetrically arranged. Under the condition of ensuring lighting performance to realize efficient spotlighting, the device is not only capable of reducing the parabolicreflection column surface machining difficulty and production cost of CPC, but also capable of getting rid of dip angle limitation of traditional CPC systems so as to realize flatwise placing on the ground, thereby improving the system operation stability. The device is suitable for vacuum solar heat collection tubes of circular absorbers to output medium and low-temperature heat energy, and can form large-scale medium and low-temperature solar heat collection arrays through a serial / parallel connection manner.

Description

technical field [0001] The invention relates to a solar heat collecting device, in particular to a solar energy concentrating heat collecting device with equal reception and escape half-angle, and belongs to the technical field of solar heat utilization. Background technique [0002] Solar thermal utilization is the most common way in daily life. Although the total energy of solar radiation is large, the solar flux density is very low. In order to use solar energy to generate high-temperature heat, it is often necessary to concentrate sunlight. At present, there are trough concentrating systems, dish concentrating systems, tower concentrating systems, and Fresnel concentrating systems with relatively mature technologies. These concentrators have complex structures, must continuously track sunlight, and are extremely difficult to install and disassemble. Convenience, high system cost, difficult to be accepted by ordinary industrial enterprises. However, in the 1970s, the co...

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Problems solved by technology

However, due to the difficulty in processing the parabolic reflective cylinder of CPC, the manufacturing process is complicated and the precision is low, which virtually increases the cost

[0003] At present, in most of the solar concentrators used, only one concentrator is used to operate independently, and the advantages of various concentrators cannot be combined to achieve the best receiving effect.

In addition, even if a symmetrical CPC does not need a continuous light tracking device, it needs to adjust the inclination angle between the concentrator and the ground intermittently or seasonally to obtain more solar energy, and the inclination angle changes with the latitude of the geographical location. This reduces system stability and increases the amount of consumables, thereby increasing costs

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