Concave mirror reflective-concentrating sun-locking heat-absorption type solar heat energy collecting method and device

Abstract

The invention discloses a solar energy collecting method and a device. The solar rays which are reflected and focused by a concave mirror are led into the inner part of a hollow cavity through a small hole on the hollow cavity which is made of high-temperature resistant material such as cast iron, carbon fibers and the like and is opaque and is in a pipe shape or a spherical shape, the solar ray is reflected and absorbed by the inner wall of the hollow cavity for multiple times to realize the conversion of solar energy to heat energy, and transparent glass or plastic shell in a spherical shape, an inclination rooftop shape, a round rooftop shape, a hemispherical rooftop shape and the like is made as a wind resistant body of the concave mirror reflective and focusing solar heat energy collecting device. The solar energy collecting device is low in production cost, is simple in process, is long in service life and is convenient to maintain.

Description

technical field [0001] This design proposal involves a device that reflects sunlight through a concave mirror, focuses the sunlight, converts light energy into heat energy, and collects heat energy. Background technique [0002] Existing concave mirrors are disc or trough-shaped. Devices that use solar energy by reflecting and focusing sunlight through the concave mirror to convert sunlight to heat and utilize solar energy require a mechanical rotating device that rotates with the movement of the sun to drive the concave surface. The mirror is rotated so that the sunlight is irradiated vertically to the concave mirror. The concave mirror focuses the sunlight on the focus or focal line of the concave mirror. The solar vacuum tube uses black light-absorbing material to absorb sunlight energy, convert sunlight energy into heat energy, and collect sunlight energy in the form of heat energy. [0003] On a cloudless sunny day, the energy density of the sun's rays is extremely hig...

AI Technical Summary

Problems solved by technology

The existing black light-absorbing composite materials are extremely expensive, have insufficient high temperature resistance, insufficient adaptability to repeated changes in high and low temperatures, have a very limited lifespan, and are extremely expensive

The production technology of high temperature heat absorbing device is difficult and the process is complicated

[0004] Most of the similar devices use relatively heavy and sturdy mechanical rotation systems, and are equipped with extremely high-strength and heavy concave mirrors to resist strong winds. The cost is extremely high and maintenance is inconvenient

Especially in places with strong wind and sand, the mechanical rotation system is extremely easy to wear, shorten the service life, or break down due to wind and sand, and the maintenance cost is extremely high

In places with a lot of rain, the mechanical rotation system is also very easy to rust, which increases maintenance costs

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