Carbon black-graphene nanometer solar absorber applied to solar water heater

A technology of solar energy absorption and graphene, applied in solar thermal energy, solar collectors, solar collectors using working fluids, etc., can solve complex film or coating process, high cost, small effective absorption area of ​​sunlight, etc. problems, to achieve good heat preservation effect, reduce heat loss, and reduce heat absorption efficiency

Inactive Publication Date: 2017-03-22
XIDIAN UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a carbon black-graphene nano-solar absorber applied to solar water heaters. Under the current conditions, the utilization rate of vacuum tube solar water heaters for sunlight absorption is only about 60%; the outer

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  • Carbon black-graphene nanometer solar absorber applied to solar water heater
  • Carbon black-graphene nanometer solar absorber applied to solar water heater

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Embodiment Construction

[0028] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] The carbon black-graphene nano-solar absorber provided by the embodiments of the present invention is composed of nano-powder, dispersant, dispersion medium, and pH regulator;

[0031] According to the mass ratio of nano powder: dispersant: dispersion medium: pH regulator=1~2:5:100:3;

[0032] The nano powder is black nano carbon black-graphene particles; the dispersant is polyethylene glycol PEG4000, and the dispersion medium is deionized water; the pH regulator is composed of...

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Abstract

The invention discloses a carbon black-graphene nanometer solar absorber applied to a solar water heater. The carbon black-graphene nanometer solar absorber is prepared from medium water, a pH regulating agent, nanometer powder and a dispersing agent. The solar water heater comprises a transparent vacuum glass box, heat conduction water pipes and a feed inlet, wherein the transparent vacuum glass box is used for containing the prepared solar absorber. Slurry of the prepared solar absorber is added into the body of the glass box, sunlight irradiates the slurry by penetrating through the vacuum glass box, nanometer particles dispersed in water efficiently absorb sunlight by means of the surface effect, and the water temperature is rapidly increased. The problems that in the prior, an invalid wave absorption gap device is arranged between vacuum pipes, selective wave absorption materials are evaporated on the inner surfaces of the vacuum pipes, the solar absorption rate is low, the utilization rate is low, the evaporation technology is complex, the cost is high, heat dissipation is fast, and the heat insulation effect is poor are solved. Efficient absorption and utilization (reaching 85%-95%) of solar energy are achieved, the realization 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 carbon black-graphene nano 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 worl...

Claims

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Application Information

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IPC IPC(8): F24J2/05C09D5/32C09D1/00C09D7/12F24S10/40
CPCC09D1/00C09D5/32C09D7/65F24S10/45Y02E10/44
Inventor 张显桂文华卫云鸽唐前林贾巧英
Owner XIDIAN UNIV
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