Trough type solar all-day heat supply system using dust particles as energy storage material

Abstract

The invention relates to a trough type solar all-day heat supply system using dust particles as an energy storage material. According to the technical scheme, a plurality of sets of heat conduction metal are longitudinally arranged in an energy storage tank, a heating heat exchange pipe makes contact with the heat conduction metal, a heat release heat exchange pipe makes contact with the heat conduction metal, and an inner cavity of a dust particle energy storage tank is filled with dust particles; a groove type solar heat collection field heats heat conduction oil and is connected with the dust particle energy storage tank through a heat conduction oil pipe, and the dust particles are heated through the heating heat exchange pipe; and the outer end of the heat release heat exchange pipe is connected with a heat exchanger through the heat conduction oil pipe, heat is released to the heat release heat exchange pipe through the dust particles, and oil well external liquid conveying of the heat exchanger is heated. The trough type solar all-day heat supply system using the dust particles as the energy storage material has the beneficial effects that the dust particles are used as theenergy storage material, the cost of the energy storage material is greatly reduced, the problem of high manufacturing cost of a worldwide heat energy storage system is solved, and the comprehensive manufacturing cost of the energy storage system is 1 / 3-1 / 4 of the manufacturing cost of molten salt energy storage, so that full-time heating application of liquid conveying outside an oil field and anoil well can be achieved.

Description

technical field [0001] The invention relates to sensible heat energy storage and trough solar energy technology, in particular to a trough solar all-day heating system using dust particles as energy storage materials. Background technique [0002] Solar energy is an inexhaustible clean energy. At present, the utilization of solar heating mainly includes two aspects: one is the utilization of solar heat, and the solar water heaters based on all-glass vacuum tube collectors and flat panel collectors have leapt to the first place in the world's total output in my country; Using reflected and focused sunlight to heat up and generate hot steam to drive turbines to generate electricity is a project with broad development prospects in current solar power generation projects. [0003] In addition, with the continuous improvement of the country's requirements for energy conservation and environmental protection, trough solar energy, the most energy-saving, environmentally friendly, a...

AI Technical Summary

Problems solved by technology

At present, it is a trend to study phase change materials in the field of energy storage, but phase change materials have four significant shortcomings that cannot be overcome for the time being: 1. The heat capacity of a piece of phase change material is fixed and cannot be changed, and can only be used for fixed needs use

2. The temperature condition for a phase change material to trigger a phase change is certain, and it can only be used correspondingly, not universally

3. The price of the material itself is high; 4. The equipment cost of the operating system is high, which also causes the cost of the entire energy storage system to be extremely high

[0007] Each has advantages and disadvantages according to its material characteristics: 1. The advantages of water are high specific heat capacity and low cost. The disadvantage is that the boiling point is low, only 100°C, and can only be used below this temperature. It is not suitable for energy storage under target conditions such as high temperature and large capacity. ;2. The advantage of heat transfer oil is that it can be configured as the high temperature grade 300℃-500℃ heat transfer oil you need, and the heat transfer effect is good. The disadvantage is that the cost is too high, and the high-quality high-temperature heat transfer oil is close to 10,000 yuan per ton. Tons, large-scale use is not economical

3. The cost of molten salt energy storage is half lower than that of heat transfer oil energy storage, but its operation and maintenance costs are high, the temperature cannot be lower than the solidification temperature of molten salt, and the minimum must be above 100°C, and professional molten salt pumps are required , the cost of molten salt storage equipment is also very expensive

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