4results about How to "Extended operating range" patented technology

The application provides a compressed air energy storage system and method, and relates to the technical field of energy storage.The compressed air energy storage system comprises a compression device, a multistage gas storage device and a multistage expansion device.The multistage gas storage device comprises a main gas storage device and a plurality of sub gas storage devices.The gas inlet of the main gas storage device is communicated with the gas outlet of the compression device.The first gas outlet of the main gas storage device is respectively communicated with the gas inlets of the sub gas storage devices.The multistage expansion device comprises a plurality of sub expansion machines connected in series.The gas inlet of the multistage expansion device is communicated with the second gas outlet of the main gas storage device.The gas inlet of each sub expansion machine is communicated with the gas outlet of the corresponding sub gas storage device.The compressed air energy storage system has a wide adjustable operation range when releasing energy, and the operation boundary of the system is expanded.

This invention relates to the field of centrifugal compressor technology, specifically disclosing a supercritical carbon dioxide centrifugal compressor and its aerodynamic design method. The centrifugal compressor includes a centrifugal impeller; on the circumferential direction of the impeller disk, multiple main blades and multiple branch blades are arranged in an alternating structure, and the inlet portion of each branch blade is recessed and offset from the inlet portion of each main blade along the axial direction of the impeller disk. This invention, through optimized design of the centrifugal impeller, effectively avoids condensation at the inlet of the centrifugal compressor under near-critical conditions for S-CO2, which is beneficial for improving compressor efficiency, widening the operating range, and allowing for the selection of inlet parameters that are closer to the critical point. This, in turn, effectively improves the cycle efficiency of the S-CO2 power generation system, possessing significant engineering importance and broad application prospects.

The invention relates to a variable-frequency refrigerating system, air conditioning equipment and a control method. The variable-frequency refrigerating system comprises a cold supply tail end, a pipeline assembly, a plurality of variable-frequency refrigerating modules arranged in parallel and a plurality of variable-frequency water pumps arranged in parallel, and the variable-frequency refrigerating modules and the variable-frequency water pumps are connected with the cold supply tail end through the pipeline assembly; the frequency conversion refrigeration module comprises a compressor, a fan assembly and a heat exchanger assembly. The variable-frequency refrigeration module and the variable-frequency water pump of the variable-frequency refrigeration system can achieve variable-frequency control, the water pump and the refrigeration module can be matched in operation state under different working conditions, the operation range of the variable-frequency refrigeration system and the air conditioning equipment is expanded through the dual-variable-frequency design, and the system efficiency can be improved. Due to the fact that the variable-frequency refrigerating modules connected in parallel and the variable-frequency water pumps connected in parallel are arranged in the variable-frequency refrigerating system, redundant design of the refrigerating modules and the water pumps can be achieved, failure of the system due to damage of part of components is avoided, and the reliability and stability of the variable-frequency refrigerating system are improved.

This application provides a method and product for optimizing a nuclear power plant operation diagram. The method includes: obtaining the operating parameters corresponding to each boundary in the nuclear power plant operation diagram; for each boundary, determining the minimum margin of each core parameter of the nuclear power plant core at the boundary based on the corresponding operating parameters; adjusting the boundary position along the target direction when the difference between the target margin and the margin threshold exceeds a preset range, and there is room for adjustment at the endpoint position of the boundary in the target direction; the target margin is the minimum value of the minimum margin of each core parameter; updating the endpoint position of each boundary according to the position change of each boundary; updating the nuclear power plant operation diagram based on the endpoint position of each boundary. The above steps are repeated until the difference between the target margin and the margin threshold corresponding to each boundary is within a preset range, resulting in the final nuclear power plant operation diagram. The operation diagram obtained by this application can provide the maximum operating range for the core while ensuring the safe operation of the core.