7results about How to "Efficient heat storage" patented technology

The invention discloses a dynamic adaptation and multi-level feedback control solid heat storage system and method.The system comprises a heat storage unit, a feedback control system, a self-adaptation control module and a dynamic flow adjusting device, the heat storage unit is connected with the feedback control system and the self-adaptation control module, the self-adaptation control module is connected with the feedback control system, and the dynamic flow adjusting device is connected with the feedback control system. The dynamic flow adjusting device is arranged on the heat storage unit and connected with the feedback control system and the self-adaptive control module. The heat storage unit comprises a plurality of subareas, and a plurality of heat storage modules which are connected in series and in parallel are arranged in each subarea; the feedback control system comprises a multi-point sensor and is used for monitoring temperature and flow data of each subarea; the self-adaptive control module is used for dynamically adjusting the flow and the temperature of each partition in the heat storage unit by utilizing a multi-level feedback algorithm based on real-time data of the feedback control system; the dynamic flow adjusting device is used for adjusting flow distribution of all the subareas in the heat storage unit according to the load requirement.

The present invention discloses a device for improving the heat transfer efficiency of a soil heat storage body by utilizing the condensation phenomenon, including an air intake component, wherein the air intake component passes through the insulation layer soil from the ground surface, a heat storage channel for heat storage is arranged under the insulation layer soil, the lower end of the air intake component is connected to the heat storage channel, and the other end of the heat storage channel is connected to the exhaust component, and the exhaust component passes through the insulation layer soil from bottom to top. The soil source heat pump of the present invention avoids the problem of reduced heat storage efficiency caused by condensed water due to the condensation phenomenon, and can efficiently store heat in the summer when the air temperature and air moisture content are the highest. The soil source heat pump utilizes permeable bricks to absorb condensed water when the condensation phenomenon occurs, forming heat and mass transfer to store part of the latent heat in the air into the soil. In the present invention, after the permeable bricks absorb a certain amount of water during condensation, they change from dry bricks to wet bricks, which improves the heat exchange efficiency. At the same time, the permeable bricks are honeycomb-shaped, and the heat transfer coefficient will continue to increase at high wind speeds, ensuring the heat transfer efficiency.

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 discloses a heating system and an operation method thereof, and relates to the technical field of heat energy storage. The heating system comprises an air source heat pump, a packed bed phase change heat storage device and a radiator. The air source heat pump and the packed bed phase change heat storage device are connected in series to form a heat storage circulation loop; the packed bed phase change heat storage device and the radiator are connected in series to form a heat release circulation loop; a branch pipeline is further arranged in the heat release circulation loop; and the branch pipeline is connected with the packed bed phase change heat storage device in parallel. According to the operation method, by optimizing a flow curve and adopting a circulating water flow curve with linear growth and parabolic growth, the purpose of prolonging the effective heat release time of the packed bed phase change heat storage device is finally achieved, efficient heat storage can be achieved, and the effective heat release time is greatly prolonged; and a preferable scheme with wider adaptability is provided for efficient utilization and heat energy storage of the air source heat pump.

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.

The invention discloses a large-size flat-plate solar collector, and belongs to the technical field of solar collectors. Comprising an outer shell, and a glass cover plate is fixed to the front side of the outer shell; a heat absorption unit is arranged on the inner side of the outer shell, and a heat collection pipe set connected with the heat absorption unit is arranged on the outer shell. The heat collecting pipe group is connected to the heat storage unit; the heat absorption unit comprises a heat absorption plate, a first flow channel unit, a second flow channel unit, an aluminum foil air bag unit and a supporting heat preservation unit, and a plurality of heat exchange grooves are pressed in the heat absorption plate at intervals; the first flow channel unit comprises flow channel branch pipes which are pressed and welded in the heat exchange grooves, and the two ends of each flow channel branch pipe are connected to the upper collecting pipe and the lower collecting pipe through transition parts correspondingly; according to the large-size flat-plate solar collector, heat can be continuously collected in a low-temperature state, heat energy of heat collection can be fully utilized, and more energy is saved in use.