| Cite this article: | 刘俊萍,江楠,许继恩,等.固定式太阳能喷灌系统喷洒水滴动能分布的研究[J].灌溉排水学报,0,():-. |
| Liu Junping,jiangnan,Xu Jien,et al.固定式太阳能喷灌系统喷洒水滴动能分布的研究[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Droplet kinetic energy distribution of fixed solar sprinkler irrigation |
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Liu Junping1, jiangnan2, Xu Jien2, Li Jipeng2, Zhang Qing2
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1.Research Center of Fluid Machinery Engineering and Technology,Jiangsu University;2.jiangsu university
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| Abstract: |
| 【Objective】The existing solar sprinkler irrigation system has problems such as unstable hydraulic performance, uneven energy distribution and low conversion efficiency. The light intensity directly affects the spray performance of the sprinkler irrigation system.【Method】In this paper, laser raindrop spectrometer measurement technology was used to test hydraulic performance parameters under different light intensities between 225.7~1145 W/m2. Experimental research revealed the distribution of the droplet kinetic energy, the kinetic energy per unit volume and the kinetic energy intensity. The measurement and calculation methods of system energy conversion efficiency were proposed. 【Result】The results showed that the influence of light intensity on droplet kinetic energy was mainly concentrated in the small droplets with diameter of less than 1 mm at a short distance. As the light intensity increased, the kinetic energy per unit volume increased first, then decreased and tended to be stable. The kinetic energy per unit volume fit well with the fourth-degree polynomial model established in this paper. With the increase of the radial distance, the kinetic energy intensity got larger and reduced to 0 at the end of the range. When the light intensity changed between 300.8~1018.8 W/m2, the fluctuation range of kinetic energy intensity was small. The energy conversion efficiency of the solar sprinkler irrigation system was between 24.59%~37.21%. When the light intensity is 225.7~416 W/m2, the conversion efficiency of the system energy intensity is highest and stable at about 36%.【Conclusion】In general, when the light intensity is 300.8~416 W/m2, the kinetic energy intensity fluctuation range is the smallest, the energy distribution is more uniform, and the energy conversion efficiency is higher. It provides a theoretical basis for improving the spray performance and energy conversion rate of the solar sprinkler irrigation system, and the optimal configuration of operating parameters in different regions. |
| Key words: solar sprinkler irrigation system; light intensity; droplet distribution; kinetic energy intensity; energy conversion |
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