Carbon black-carbon nanotube solar absorbing agent applied to solar water heater

Abstract

The invention discloses a carbon black-carbon nanotube solar absorbing agent applied to a solar water heater. The carbon black-carbon nanotube solar absorbing agent is prepared by medium water, a pH conditioning agent, nanopowder and a dispersing agent; the solar water heater includes a transparent vacuum glass box for holding the prepared solar absorbing agent, a heat conducting water pipe and a feed port; slurry of the prepared solar absorbing agent is added in the glass box body; sunlight penetrates through the vacuum glass box to irradiate the slurry; and nanoparticles dispersed in water use the surface effect for efficiently absorbing the sunlight to quickly increase the water temperature. The carbon black-carbon nanotube solar absorbing agent solves ineffective wave absorbing gap position between vacuum tubes in the prior art; and selective wave absorbing materials are evaporated on the surfaces of inner tubes of the vacuum tubes to cause the problems of low solar absorbing rate, low utilization rate, complex evaporation process, high cost, quick heat dissipation and weak heat insulation effect. The carbon black-carbon nanotube solar absorbing agent realizes efficient absorption and utilization of solar energy (85-95%), realizes simple process, and is lower in cost.

Description

technical field [0001] The invention belongs to the field of heat collection systems of solar water heaters, and in particular relates to a carbon black-carbon nanotube 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 wo...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of carbon black-carbon nanotube solar absorber that is applied to solar water heater, aims to solve the solar energy (light) absorption efficiency low in the prior art, utilization rate is low, process is complicated, the problem that cost is high

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