2results about How to "Increase net efficiency" patented technology

The application provides a supercritical carbon dioxide heat exchange system and a waste heat recovery method, and belongs to the technical field of energy and thermal equipment. The system adopts a differential flow channel design combining a large-pitch channel on the flue gas side and a micro-channel on the carbon dioxide side, and integrates an online pulse soot blowing device taking preheated compressed air as a medium. Meanwhile, the heat exchange core adopts a nickel-based alloy material with smooth surface treatment to inhibit ash adhesion. The heat exchanger can be integrated in a supercritical CO2 Brayton cycle power generation system, soot blowing is triggered by intelligently monitoring pressure drop or temperature difference, and soot blowing is realized without stopping. The application fundamentally solves the problems of blockage and ash deposition of high-efficiency heat exchangers under the working condition of ash-containing flue gas, ensures that the waste heat recovery system can operate long-term, stably and efficiently, and significantly improves the energy utilization efficiency and system economy.

The invention discloses an all-vanadium redox flow battery and a net-shaped vein flow field structure thereof, the all-vanadium redox flow battery comprises a collecting channel, a main flow channel and branch flow channels, the collecting channel is annularly arranged at the periphery of a flow field, one end of the main flow channel is provided with a flow channel inlet, the other end of the main flow channel is provided with a flow channel outlet, the branch flow channels are symmetrically arranged at two sides of the main flow channel in the same direction, one end of each branch flow channel is communicated with the main flow channel, and the other end of each branch flow channel is communicated with the flow field. And thin flow channels are arranged between the branch flow channels and the main flow channel. Therefore, the targets of'flow channel optimization 'for reducing pump work and'distribution optimization' for improving uniformity are simultaneously achieved in the off-basis three-outlet meshy vein fractal structure, a large number of parallel short paths are provided through the fractal structure, fluid is rapidly distributed to the whole active area, the overall flow resistance is greatly reduced, the pumping power consumption is reduced, and the pumping efficiency is improved. The net efficiency of the system is improved, so that the development of an all-vanadium redox flow battery system with high power density and long service life is facilitated.