| 引用本文: | 谈明高,云天平,吴贤芳,等.喷头数量对光伏喷灌系统运行特性的影响[J].灌溉排水学报,0,():-. |
| Tan Minggao,Yun Tianping,Wu Xianfang,et al.喷头数量对光伏喷灌系统运行特性的影响[J].灌溉排水学报,0,():-. |
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| 喷头数量对光伏喷灌系统运行特性的影响 |
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谈明高1, 云天平1, 吴贤芳2, 马皓晨3, 刘厚林1
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1.江苏大学流体机械及工程技术研究中心;2.江苏大学能源与动力工程学院;3.江苏大学机械工程学院
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| 摘要: |
| 为掌握喷头数量对无蓄电池光伏灌溉系统运行特性的影响,搭建光伏灌溉系统开式试验台,试验测量了不同喷头负载数量下的系统性能。试验结果表明：不同负载下的喷头压力均随着光照强度变化而变化,变化幅度随着光照强度区间增大而降低,2负载的饱和光照强度比4负载低了200W/m2；随着系统负载喷头数量增大,喷头饱和工作压力逐渐降低,2负载饱和压力约为450Kpa,4负载饱和压力为435Kpa,喷头达到饱和压力所需光照强度逐渐升高,喷头径向降水量逐渐减少,喷头各段之间降水量差值逐渐减小；2负载的径向水量分布结构为较差的“梯形分布”,4负载的径向水量分布结构为较好的“三角形分布”；随着负载喷头数量增加,泵扬程、转速、流量随光照强度瞬态变化的幅度逐渐减少,泵流量-扬程曲线与管路特性曲线的交点右移,系统在较大流量工况下运行,喷头工作压力降低,喷灌均匀性更好,4喷头最大均匀系数比2喷头大2%。 |
| 关键词: 光伏;负载数量;喷头;泵;喷灌; |
| DOI： |
| 分类号:S214 |
| 基金项目: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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| Influence of nozzle load quantity on the photovoltaic sprinkling irrigation system |
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Tan Minggao1, Yun Tianping1, Wu Xianfang2, Ma Haochen3, Liu Houlin1
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1.Research Center Of Fluid Machinery Engineering and Technology,jiangsu university;2.SchoolOf Energy and Power Engineering,Jiangsu University;3.School of Mechanical Engineering,Jiangsu University
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| Abstract: |
| In order to grasp the influence of nozzle number on the operating characteristics of the non-battery photovoltaic irrigation system, an open test bench for the photovoltaic irrigation system was built. The main instruments of the test included photovoltaic modules, photovoltaic inverters, photovoltaic pumps, and sprinklers. The system performance under different nozzle loads is measured. The test results showed that the pressure of the nozzles under both loads changed with the changed of light intensity, and the change range decreased with the increased of the light intensity interval. The saturation light intensity at load 2 was 200W/m2 lower than that at load 4. As the number of system load nozzles increased, the saturated working pressure of nozzles decreased gradually. The saturation pressure of 2 nozzles was about 450Kpa, and that of 4 nozzles was 435Kpa. The light intensity required for the nozzle to reach the saturation pressure gradually increased, the radial precipitation of the nozzle gradually decreased, and the difference in precipitation between each section of the nozzle gradually decreased. The radial water distribution structure of the 2 loads was the poor "trapezoidal distribution", the radial water distribution structure of the 4 loads was a better "triangular distribution". As the number of load nozzles increased, the amplitude of the transient change of the pump head, speed, and flow rate with the light intensity gradually decreased. The intersection of the pump flow-head curve and the pipeline characteristic curve moved to the right. The system operated at a larger flow rate, the working pressure of the sprinkler was reduced, and the sprinkler irrigation uniformity was better,the maximum uniformity coefficient of 4 sprinklers was 2% higher than that of 2 sprinklers. |
| Key words: Photovoltaic;Number of loads; Sprinklers; Pumps; Sprinkling irrigation; |
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