| Cite this article: | 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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| 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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