TiN nanometer solar absorbent for solar water heater

Abstract

The invention discloses a TiN nanometer solar absorbent for a solar water heater. The TiN nanometer solar absorbent for the solar water heater is prepared from medium water, a pH conditioning agent, nanometer powder and a dispersing agent. The solar water heater comprises a transparent vacuum glass box, a heat conducting water pipe and a feeding opening, wherein the transparent vacuum glass box is used for containing the prepared solar absorbent. The Prepared solar absorbent slurry is fed into the glass box, nanometer particles dispersed in water efficiently absorb sunlight through the surface effect of the nanometer particles in the manner that the sunlight penetrates the vacuum glass box to illuminate the prepared solar absorbent slurry, and then water temperature is rapidly raised. The TiN nanometer solar absorbent for the solar water heater mainly solves the problems that in the prior art, inefficient wave-absorbing interval positions exist between vacuum tubes, the surfaces of inner tubes of the vacuum tubes are provided with a selective wave-absorbing material through vapor evaporation, the solar absorption rate is low, the solar utilization rate is low, the vapor evaporation technology is complicated, the cost is high, heat dissipation is rapid, and the heat insulation effect is poor; and the TiN nanometer solar absorbent for the solar water heater achieves efficient absorption and utilization of solar energy (the solar absorption rate reaches 85%-95%), the implementation process is simplified, and the cost is low.

Description

technical field [0001] The invention belongs to the field of heat collection systems of solar water heaters, and in particular relates to a TiN nanometer solar absorber applied to solar water heaters. Background technique [0002] At present, as the concept of "energy saving and environmental protection" gradually penetrates into people's hearts, clean energy such as solar energy is becoming more and more popular, and the popular solar water heater is a good illustration of this point. A solar water heater is a device that can convert sunlight energy into heat energy and heat water from low temperature to high temperature to meet people's hot water needs in life and production. Common water heaters on the market are divided into structural forms: vacuum tube solar water heaters and flat plate solar water heaters. At present, the most widely used in China is the vacuum tube solar water heater, while the flat plate solar water heater is generally used in the world. The vacuu...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a TiN nano-solar absorbing agent applied to solar water heaters, aiming to solve the problem that vacuum tube solar water heaters in the domestic market have a small effective absorption area of ​​sunlight. The utilization rate of sunlight absorption is only about 60%; the outer surface of the glass inner tube is coated with selective absorption coating, film or coating with excellent long-term stability by high vacuum reaction evaporation, magnetron sputtering and other technologies The process is more complicated and the cost is higher

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