The invention discloses an adjustable peak energy storage system based on supercritical carbon dioxide circulation and a control method thereof. The system comprises a low-pressure supercritical carbon dioxide storage tank, a first compressor, a first heat exchanger, a first cooler, a high-pressure supercritical carbon dioxide storage tank, a low-temperature brine storage tank and a high-temperature brine storage tank; a first outlet of the low-pressure supercritical carbon dioxide storage tank is connected with an inlet of the first compressor through a first control valve, an exhaust port ofthe first compressor is connected with a first inlet of a first heat exchanger, and a first outlet of the first heat exchanger is connected with an inlet of the high-pressure supercritical carbon dioxide storage tank through the first cooler and a second control valve; and a second outlet of the first heat exchanger is connected with an inlet of the high-temperature brine storage tank, and an outlet of the low-temperature brine storage tank is connected with a second inlet of the first heat exchanger through a fourth control valve. By the adoption of the system, peak shifting and valley filling can be effectively realized, the power cost of a user can be well reduced, and the capability of the user to accept an intermittent energy source can be improved.

Adjustable peak energy storage system based on supercritical carbon dioxide circulation and control method thereof

The invention discloses a supercritical carbon dioxide solar power generation and energy storing integrating system The whole system is applicable to the fields of renewable energy sources and intelligent power grids The system comprises the following main devices: a solar heat collector, a heat exchanger, a heat transferring oil pump, a pipeline, a fuse salt storing tank, a valve, a main compressor, a recompression device, a high-temperature heat regenerator, a low-temperature heat regenerator, a turbine, an engine/ power generation machine, a condenser, a clutch, a control system, etc Thesystem is applicable to solar heat power generation and is capable of acquiring energy from power grids to assist peak load regulation of the power grids; in addition, the redundancy for the devicesis reduced, and thus the system reliability is improved

Supercritical carbon dioxide solar power generation and energy storing integrating system

The invention provides a solid tandem heat pump type circulating energy storage method and a solid tandem heat pump type circulating energy storage device. The solid tandem heat pump type circulatingenergy storage method comprises an energy storage mode, a power generation mode and a heat energy comprehensive utilization mode. When the energy storage mode is adopted, a normal-temperature workingmedium is subjected to adiabatic compression through a compressor, is subjected to isobaric heat release by a solid heat storage system, enters a turbine to perform adiabatic expansion to do externalwork and is subjected to isobaric heat absorption by a solid cold storage system; the normal-temperature working medium returns to the compressor and the above process is repeated; a flow control valve, the compressor, the solid heat storage system, the turbine and the solid cold storage system are arranged on the solid tandem heat pump type circulating energy storage device sequentially along thewalking direction of the working medium and form a loop. The power generation mode and the heat energy comprehensive utilization mode are opposite to the energy storage mode. Through the efficient solid tandem heat pump type circulating energy storage method and device, the problem of wind abandoning and light abandoning in photovoltaic power generation and wind power generation as well as the problem of peak shaving of power grid peak valley electricity is solved, electricity and heat are supplied efficiently, or heat energy comprehensive application of heating, cooling and the like is provided while power is supplied.

Solid tandem heat pump type circulating energy storage method and device

The invention relates to a carbon dioxide energy storage and organic Rankine cycle combined power generation system based on LNG cold energy utilization. The system comprises a carbon dioxide energy storage and energy release unit, an organic Rankine cycle power generation unit, and an LNG supply unit. The system uses optimal utilization of cold energy of LNG as the purpose, and combines the energy storing and releasing process, with carbon dioxide as working mediums, with the organic Rankine cycle to realize gradient utilization of the LNG cold energy to finish conversion of the LNG cold energy to electric energy.

Carbon dioxide energy storage and organic Rankine cycle combined power generation system

The invention discloses a compressed air energy-storage heat regenerative system and method. The compressed air energy-storage heat regenerative system comprises an air compressor, an air storage chamber, a turbo expander, a two-way heat exchanger, a one-way heat exchanger, and a high-temperature liquid storage tank and a low-temperature liquid storage tank; during heat storage of energy storage,air is sucked into the air compressor, compressed to be high temperature and high pressure, and stored in the air storage chamber after being cooled by the two-way heat exchanger, meanwhile, heat is stored in the high-temperature liquid storage tank through the two-way heat exchanger; and during heat regenerating of release energy, the high-pressure air released by the air storage chamber enters the turbo expander after being heated by the two-way heat exchanger and the one-way heat exchanger, meanwhile, heat is fed back to the high-pressure air through the two-way heat exchanger and the one-way heat exchanger. According to the compressed air energy-storage heat regenerative system, through the reasonable design of the heat exchange area and power of the two-way heat exchanger and the one-way heat exchanger, the basic functions of the heat storage and the heat regeneration can be ensured, meanwhile, the utilization rate of equipment is effectively improved, the equipment investment costs are reduced, and the site area is reduced.

Compressed air energy-storage heat regenerative system and method

The invention discloses a compressed supercritical carbon dioxide energy and heat storage system and a working method thereof, and belongs to the field of energy storage. The system comprises a motor, a compressor, a low pressure supercritical carbon dioxide storage tank, a cooler, a heat accumulator, a high temperature oil tank, a high pressure supercritical carbon dioxide storage tank, a low temperature oil pump, a low temperature oil tank, a high temperature oil tank, a preheater, a heat regenerator, a heater, a turbine and a power generator. In a trough period of a load of a power grid, electric energy is used for compressing supercritical carbon dioxide; and in a peak period of the load of the power grid, the compressed supercritical carbon dioxide is released to push the turbine to do work to generate power. The system can simultaneously store energy and heat to realize conventional 'peak-load shifting'; compared with conventional compressed air, the compressed supercritical carbon dioxide can reduce the volume of a storage tank and save compression power; and by the adding of heat conduction for circulation, the heat efficiency of the whole system can be improved.

Compressed supercritical carbon dioxide energy and heat storage system and working method thereof

The invention discloses a direct-contact heat exchange tower type solar thermal generating station system and a working method thereof, and belongs to the field of solar thermal utilization. The system comprises a heliostat field, a heat absorber, a molten salt heat storage and release subsystem, a turbine, an electric generator, a preheater, a cooler and a compressor. Sunlight is reflected into the heat absorber through the heliostat field, after air is compressed, high-temperature and high-pressure air is generated through the heat absorber to push the turbine to apply work for power generation, and the working method is adjusted by combining with the molten salt heat storage and release subsystem according to differences of solar energy intensity. According to the direct-contact heat exchange tower type solar thermal generating station system and the working method thereof, by means of the characteristics that molten salt is low in vapor pressure and wide in using temperature range, an air and molten salt direct-contact heat exchange mode is adopted for replacing traditional wall-type heat exchange, the heat exchanger efficiency can be improved, and a heat exchange temperature difference can be reduced; meanwhile, the air serves as a working medium, the phenomena of large-range flow-induced corrosion and frozen blocking of the molten salt in a pipeline are avoided. Meanwhile, continuous and stable operation under different solar energy intensity conditions can be achieved, and stable high-quality electric energy can be provided.

Direct-contact heat exchange tower type solar thermal generating station system and working method thereof

The invention discloses a temporary refrigeration storage box for semiconductor refrigerating sheets and a working method of a temporary refrigeration storage box and belongs to the field of refrigeration. The device comprises a box body. A small partitioning box body needing refrigeration is arranged in the box body. A box door is arranged on the box body. The device further comprises a fan, cold guiding sheets, a refrigerating sheet array, radiating sheets, a temperature sensor, an infrared sensor and a solar distributed power supply. The temporary refrigeration storage box can be used for storing vegetables, melons, fruits and the like in batches in a classified mode and applied to various occasions. At present, various temporary boxes capable of storing objects are arranged at doorways of supermarkets, but no refrigeration storage box which can be used for storing raw foods is arranged, and the temporary refrigeration storage box is used for storing the raw foods. According to the temporary refrigeration storage box for the semiconductor refrigerating sheets, the defects of large noise, large size, complex structure and high cost which are caused by using a compressor in a traditional refrigeration box are changed.

Temporary refrigeration storage box for semiconductor refrigerating sheets and working method of temporary refrigeration storage box

The invention discloses a trepanning electrolytic machining clamp for diffusers with insoluble blade trailing edges and a method thereof, and belongs to the field of electrolytic machining. The clampcomprises a left part and a right part, a cathode and an insulating block are located between a left clamp body and a right clamp body, a controllable liquid outlet gap is formed between the clamp bodies on two sides and the outer contour of the cathode, a liquid outlet corner type is used as the flowing way of electrolyte, the electrolyte flows in from the upper ends of blades and flows out fromthe liquid outlet gap, and a closed flow field is formed by the gap among an insulating sleeve, the cathode and the clamp. The insulating block is attached to the non-machining face of the cathode, sothat three-face machining of the leading edges, the concave surfaces and the convex surfaces of the blades is achieved. Concentric arc surfaces of leading and trailing edge supporting blocks are usedfor clamping annular workpieces. In the machining process, the adjacent machined blades are always sleeved with machined blade protecting sleeves, so that stray corrosion of the machined blades is effectively avoided. Through the trepanning electrolytic machining clamp and the method thereof, the problems of overlarge clamp pressure and electrolyte leakage easiness during diffuser trepanning electrolytic machining are solved, the stability of the flow field is improved easily, and machining quality is improved.

Trepanning electrolytic machining clamp for diffusers with insoluble blade trailing edges and method thereof

The invention discloses a dedusting device using a multi-stage direct current cyclone separator combined array and a method thereof, and belongs to the dedusting field. The device includes a multi-stage direct current cyclone separator array, a gas intake port, a gas discharging port, a dust discharging port, a dust discharging fan and the like. The device is characterized in that the direct current cyclone separator array is used for treating dust-containing gas flow; the dust-containing gas flow enters the device from the gas intake port, is treated by the multi-stage direct current cycloneseparator array and then is divided into two strands of gas with a large flow quantity and a small flow quantity respectively; clean gas flow having relatively large flow quantity is discharged from the gas discharging port; the dust-containing gas flow having relatively small flow quantity and carrying a large amount of dust is discharged from the dust discharging port under the action of the dust discharging fan, and the dust-containing gas flow is separated. Compared with a conventional gas separation and purification device, the device has the advantages that the pressure dropping caused by separation is greatly reduced, and the device can work continuously with mass flow for a long time without replacement of any parts under a condition of maintaining relatively high separation efficiency.

Li Han

Papers

Compressed supercritical carbon dioxide energy and heat storage system and working method thereof

Direct-contact heat exchange tower type solar thermal generating station system and working method thereof

Temporary refrigeration storage box for semiconductor refrigerating sheets and working method of temporary refrigeration storage box

Trepanning electrolytic machining clamp for diffusers with insoluble blade trailing edges and method thereof

Dedusting device using multi-stage direct current cyclone separator combined array and method thereof