Solar heat storing and collecting device

Abstract

The invention relates to a solar heat storing and collecting device based on the combination of vacuum pipes and a casing pipe in the technical field of solar energy utilization. The device comprises a plurality of glass vacuum pipes, a heat transfer casing pipe, a heat conductance material, an elastic corrugated ribbed plate, a heat-insulating plug and a condensing plate, wherein the heat conductance material comprises the following components in percentage by volume: 50 percent of solid-solid phase-change heat storage material, 20 percent of graphite powder and 30 percent of heat conducting oil; and the solid-solid phase-change heat storage material refers to cross-linked high-density polyethylene, laminated perovskite or polyalcohol. The solar heat storing and collecting device has the advantages of simple structure, safe and reliable operation, high and stable heat efficiency of a system, and capability of greatly saving cost and space due to integrated design; and the device has a regulating function of storing heat on sunny days and releasing the heat on cloudy days, so the temperature of an air or steam working medium at an outlet can be stabilized in a certain specific temperature range of between 120 and 190 DEG C.

Description

technical field [0001] The invention relates to a device in the technical field of solar energy utilization, in particular to a solar heat storage collector based on a vacuum tube-sleeve combination. Background technique [0002] In recent years, due to the limitations of traditional energy sources and the increasingly serious environmental pollution, many countries in the world have strengthened the development of new energy and renewable energy technologies. Among them, solar energy is an environmentally friendly, efficient and inexhaustible energy source. . At present, in the utilization of solar energy, the technology of solar water heaters is relatively mature, but most of these water heaters can only provide hot water with a temperature of about tens of degrees for daily life, and cannot provide the water temperature required by industry to reach more than 100 degrees. high temperature air or water vapor. At the same time, due to the influence of clouds in the sky, t...

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Problems solved by technology

However, since there is no heat storage material to store heat, the temperature of the output working medium will change with the intensity of sunlight, so the output at a constant temperature cannot be guaranteed.

[0004] Further search found that Chinese patent document number: CN1432768, records a phase change solar collector, which is characterized in that a medium-low temperature liquid-vapor phase-change material is injected into the phase-change chamber of a flat-plate solar collector, and absorbed by liquid vaporization. The heat is then conducted to the working medium, similar to the working principle of a heat pipe, the disadvantage is that the phase transition temperature is low, the heat capacity is small, the absorbed heat must be conducted in time, and there is no heat storage function

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