Composite parabolic concentrating radiator with daytime heat collection and nighttime radiative cooling

Abstract

The invention belongs to the technical field of energy utilization and particularly relates to a compound parabolic condensation type heat collection and dissipation device with the heat collection function at daytime and the radiation refrigeration function at night. The compound parabolic condensation type heat collection and dissipation device comprises a box body with the top surface opened, a compound parabolic condenser, a glass pipe and a support. The interior of the box body is of a compound parabolic shape. The support is arranged around the box body, the compound parabolic condenser is arranged in the box body, and the glass pipe is arranged in the center of the bottom of the compound parabolic condenser. A water inlet and a water outlet are formed in the two ends of the glass pipe respectively and communicated with the outer surface of the box body. The outer surface of the glass pipe is plated with a solar heat collection and radiation refrigeration composite coating. The compound parabolic condensation type heat collection and dissipation device can collect heat at daytime and carry out radiation refrigeration at night, and therefore the problem that traditional compound parabolic condensation type vacuum pipe heat collectors and radiation refrigeration devices are single in function is effectively solved.

Description

technical field [0001] The invention belongs to the technical field of energy utilization, and in particular relates to a compound parabolic light concentrating radiator with functions of heat collection during the day and radiation cooling at night. Background technique [0002] At present, scholars at home and abroad focus more on solar heat collection technology. In recent years, the compound parabolic concentrator vacuum tube collector has received more and more attention and research. Compared with the flat plate collector, it not only improves the heat collection temperature and heat collection efficiency, but also increases with the increase of the radiation intensity. The increase in the collector temperature is even greater. [0003] Compound parabolic concentrator (CPC) is a non-imaging low-focus concentrator, which is different from common parabolic reflectors in practical applications. The incident light is collected on the receiver according to the ideal conce...

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Problems solved by technology

[0005] Although the compound parabolic concentrating vacuum tube heat collection technology is relatively mature, due to the influence of day and night, the heat collector is idle at night, which reduces its use efficiency; Insufficient size leads to high cost of the device, and it is difficult for radiant refrigeration devices to achieve cooling effects during the day, etc.

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