以光伏水泵为研究对象,基于试验测试和理论分析建立光伏水泵出水量计算预测方法。采用正交试验设计优化方案,选取泵叶轮结构参数为优化变量,通过数值模拟和试验研究的方法,对该光伏水泵的性能进行优化和试验验证。结果表明：经优化后,光伏水泵系统的最低出水值下降至330 W/m2,水泵每日工作时长提升;光照辐射强度稳态时的泵出口压力脉动相较优化前有小幅提升,光照辐射强度瞬态变化时泵出口压力脉动波动幅度更平稳;优化后的模型泵叶轮进口低压区面积明显减小,叶轮出口压力显著增加,同时叶轮流道内速度分布更为均匀。
Abstract
Taking a photovoltaic pump as the research object,a method for calculating and predicting the photovoltaic pump water output is established based on experimental tests and theoretical analysis. The optimization schemes are designed by orthogonal experiment,and the structural parameters of the pump impeller are selected as the optimization variables. The photovoltaic pump performance is optimized and experimentally verified through numerical simulation and experimental research. The research results show that after optimization,the minimum water output value of the photovoltaic pump system drop to 330 W/m2,and the pump daily working time is increased. Compare with that before optimization,the pump outlet pressure pulsation is slightly improved when the light radiation intensity is steady,and the pump outlet pressure pulsation fluctuation amplitude is more stable when the light radiation intensity is transient. After optimization,the low pressure area in the pump impeller inlet is significantly reduced,the pressure at the impeller outlet is significantly increased, and the velocity distribution in the impeller passage is more even.
关键词
光伏 /
水泵 /
叶轮 /
流量 /
优化设计
Key words
photovoltaic /
pumps /
impellers /
flow rate /
optimal design
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基金
国家重点研发计划（2016YFC0400202）; 江苏省现代农业重点研发计划（BE2017356）
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