Solar water heater gathering light and collecting heat based on Fresnel lines

Abstract

The invention discloses a solar water heater gathering light and collecting heat based on Fresnel lines. The solar water heater comprises a Fresnel lens, a concave lens, a solar vacuum heat-collectingpipe, reflectors, a pulsating heat pipe, a phase-change energy storage material, a heat exchange box, a balancing water tank, a water pump, a water storage tank and a bracket. Through the solar waterheater, the solar vacuum heat-collecting pipe is heated more uniformly, sunlight can be fully utilized, and meanwhile, the phenomenon that water scale is generated inside the solar vacuum heat-collecting pipe, and consequently, the heat collecting property is affected can be avoided; the heat transmission speed can be further increased, and even through the sun radiation intensity is insufficient, normal work can also be achieved; in addition, a double-axis tracking mechanism is further arranged, and thus the operation trajectory of the sun can be tracked completely in theory so as to achievethe zero incident angle; and the solar water heater integrates various advantages, is reliable in property, simple in manufacturing technology, low in cost, free of scaling, low in heat loss and thelike, and is the future development direction of solar water heaters.

Description

technical field [0001] The invention relates to the technical field of solar thermal utilization, and more particularly, relates to a solar water heater based on Fresnel line concentration and heat collection. Background technique [0002] Sunlight can obtain quite high temperature after being focused. It is non-polluting and has high heating efficiency. It is an ideal high-temperature heat source. Therefore, it has broad application prospects in industrial production and domestic heating processes. my country is a country rich in solar energy resources. The total amount of solar radiation received by the country's land area is equivalent to 2.4 trillion tons of standard coal every year, and the annual average radiation is about 5900 MJ / square meter. [0003] There are many ways to use solar energy. In daily life, the more common one is solar water heaters that convert sunlight energy into heat energy. According to different structural forms, solar water heaters can be divi...

AI Technical Summary

Problems solved by technology

Vacuum tube solar water heaters are commonly used as all-glass vacuum tubes, which have the advantages of good heat collection performance, simple processing and manufacturing, and low price, and occupy a relatively high market share; but their volume is relatively large, which causes inconvenience in installation; and the vacuum tube is fragile. If one of the vacuum tubes is broken, the whole system cannot work normally, causing the system to be paralyzed; water directly enters the vacuum tube to absorb heat, which will easily cause scale inside the vacuum tube, which will affect the heat collection performance and increase the maintenance cost in the later stage; the all-glass vacuum tube heat collection The device cannot be used in places with high pressure and temperature requirements, because it cannot operate under pressure, and the temperature of the heating water is limited

[0004] Due to the limitations of the above reasons, the application of vacuum tube solar water heaters has been limited to a certain extent. In order to improve the application range and application rate of vacuum tube solar water heaters, it is necessary to improve the above shortcomings of vacuum tube solar water heaters.

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