3results about How to "Efficient heat storage" patented technology

This invention discloses a high-temperature solid particle interseasonal thermal storage system, comprising a vertical silo body, a closed gas circulation loop, and a heating device. The vertical silo body is filled with a solid particle thermal storage medium, which is surface-modified and coated with a nano-alumina coating. It also includes a multi-component composite insulation structure covering the silo wall, consisting of, from the inside out, a high-alumina refractory brick layer, a ceramic fiber blanket buffer layer, a nano-aerogel felt layer, and a microporous calcium silicate board layer. A sloped temperature layer control module is used to calculate the position and thickness of the sloped temperature layer in real time based on an effective thermal diffusivity model, maintaining the sloped temperature layer thickness within a set range. A multi-scale simulation prediction control unit is used to predict the sloped temperature layer trajectory in advance and calibrate and update the effective thermal diffusivity model. This invention enables large-scale, long-term (half-year) interseasonal thermal storage at the GWh level, while ensuring stable heat release temperature and minimal heat loss.

The invention relates to the technical field of heat storage materials, in particular to a desert sand-based low-cost composite heat storage material and a preparation method and application thereof.The desert sand, fly ash, magnesium oxide, an adhesive and a modifier serve as raw materials to be subjected to dry grinding to obtain mixed powder, the mixed powder is subjected to tabletting forming to obtain a blank sample, and the blank sample is dried to obtain the desert sand-based low-cost composite heat storage material. And sintering to obtain the desert sand-based low-cost composite heat storage material. The preparation method is simple in operation and low in raw material price, and the obtained composite heat storage material has the advantages of being large in heat storage density, good in heat stability, high in mechanical strength, low in cost and the like, can be used in the fields of solar thermal power generation, industrial waste heat recovery, building energy conservation and the like, and has wide application prospects. Meanwhile, a new way is provided for high-value resource utilization of solid wastes such as desert sand and fly ash.

This invention discloses a low-corrosion high-temperature energy storage molten salt and its method. The molten salt composition includes 20%~30% potassium chloride, 20%~30% sodium chloride, 1%~5% aluminum powder, 1%~5% magnesium powder, 1%~5% zinc powder, and the remainder is magnesium chloride. This invention discloses a low-corrosion high-temperature energy storage molten salt with high stability, low corrosivity, a simple preparation process, and ease of large-scale production. It can achieve excellent thermal storage performance at 600℃~800℃ with low corrosivity, has a large latent heat of phase change, high energy utilization rate, and low requirements for the material grade of metal load-bearing components such as tanks and pipelines, which can significantly reduce the cost of solar thermal engine composite materials.