新能源水循环复氧设备工况优化模拟OA

Renewable-energy water circulation and reoxygenation devices represent an emerging technology for in situ lake water restoration.Because their operation is constrained by limited renewable-energy supply,optimization of the power-system operating conditions is required to achieve long-term sustainable operation.To address the insufficient characterization of load response behavior,this study applied computational fluid dynamics(CFD)to evaluate the performance of a renewable-energy water circulation and reoxygenation device.The hydrodynamic response process,which traditionally relies on full-scale physical simulation,was quantitatively characterized through numerical simulation.This allowed the performance characteristics and variation patterns of the device under different operating conditions to be evaluated and summarized,and the optimal operating conditions under different operational objectives to be identified.The results showed that the device efficiency varied in a highly nonlinear manner with operating conditions,suggesting that optimization of the integrated system should be conducted from a system-level perspective.The highest system efficiency,66.12%,was achieved with a 20° propeller at a rotational speed of 110 r·min−1.Compared with conventional physical simulation and experimental measurement,the proposed CFD-based approach can substantially reduce labor,time,and equipment costs and may provide a reference for the optimization of similar renewable-energy-powered water circulation and reoxygenation devices.