![]() ![]() The current operation of various large axial flow pump stations for reverse power generation 12 has shown that it is technically feasible to use the reverse operation of a large axial flow pump system to generate power. Therefore, some attempts at reverse power generation using axial flow pump stations have been used in actual operations. Some large-scale axial flow pump station system administrators in China have found that reverse power generation using upstream inflow water can generate a large amount of clean energy while providing considerable economic benefits. In recent years, pump reversal has become an increasingly popular method for replacing turbine operations in engineering 1, 2, 3, 4, 5, 6, and many micro- and small hydropower plants in remote areas have started to use axial flow pump reversal to replace turbine operations 7, 8, 9, 10, 11. The research results can aid in better understanding the energy dissipation mechanism of large axial flow pump systems in reverse power generation operations. Finally, components with large mechanical energy dissipations are selected, and the changes and causes of the energy dissipation distribution of the components are thoroughly analysed under different flow conditions. Then, the type of entropy production of each component is accurately determined under different flow conditions, revealing the changes in the proportions of the different types of entropy production of each component. Then, the proportion of each component in the total entropy production is compared to illustrate how each component contributes to the total entropy production of the system and how this contribution changes as operating conditions vary. The reliability of the entropy generation numerical calculation is verified both experimentally and theoretically. First, the energy characteristics and pressure fluctuations in the pump of the large axial flow pump station system are experimentally tested under reverse power generation conditions. In this paper, entropy generation theory is applied to a large-scale axial flow pump station system in reverse power generation operations, and the entropy generation method is used to investigate the accurate size and distribution of the mechanical energy dissipation of each component under different flow conditions. ![]() At present, some large axial flow pump stations have begun to perform reverse power generation operations however, related research has not yet started. The use of existing large pumping station equipment for upstream residual water reverse power generation is an unrealized yet valuable renewable energy project. ![]()
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