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Failure behavior of pressure compensating emitter under different operation pressures in drip irrigation systems

文献类型： 外文期刊

作者： Hou, Peng 1 ; Ma, Changjian 3 ; Wang, Jia 6 ; Li, Yan 3 ; Zhang, Kai 2 ; Hou, Shance 2 ; Li, Jingzhi 2 ; Sun, Zeqiang 2 ; Xiao, Yang 2 ; Li, Yunkai 2 ;

作者机构： 1.Zhengzhou Univ, Coll Water Conservancy & Transportat, Zhengzhou 450001, Peoples R China

2.China Agr Univ, Coll Water Resources & Civil Engn, Beijing 100083, Peoples R China

3.Shandong Acad Agr Sci, Inst Agr Resources & Environm, State Key Lab Nutrient Use & Management, Jinan 250100, Peoples R China

4.Shandong Acad Agr Sci, Inst Modern Agr Yellow River Delta, Natl Ctr Technol Innovat Comprehens Utilizat Salin, Dongying 257091, Peoples R China

5.Minist Educ, Engn Res Ctr Agr Water Saving & Water Resources, Beijing 100083, Peoples R China

6.Beijing Enterprises Water Grp Ltd, Beijing 100102, Peoples R China

关键词： Emitter clogging; Flow channel; Diaphragm performance; Relative average discharge; Hydraulic performance

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：6.7； 五年影响因子：6.6 ）

ISSN： 0378-3774

年卷期： 2024 年 297 卷

页码：

收录情况： SCI

摘要： Pressure compensating emitters (PCE) can maintain a consistent irrigation flow rate under varying pressures through its internal compensation diaphragm and effectively improve the irrigation uniformity of drip irrigation systems. However, the PCE function is prone to failure, particularly when using marginal water, which can cause various technical and economic problems. To date, little is known about the failure behavior of PCE. This study investigated the effects of three pressures (0.1Mpa, 0.2Mpa, and 0.3Mpa) on the failure behavior of PCE. Then the dynamic changes in clogging substances and diaphragm performances in PCE channel were monitored. The results showed that as the system operation increased, the performance of PCE gradually decreased. The CU >80% running time was 172.8 - 634.9 h, and the flow index >0.2 running time was 120.1 - 768.1 h. The failure of PCE is primarily caused by two factors: clogging of the PCE flow channel and deterioration of the diaphragm mechanical performances. The flow rate of PCE increased by 22.6% on average at 0.3Mpa compared to 0.1Mpa, and clogging substances in the PCE flow channel decreased by 19.8%. Meanwhile, increasing the operating pressure improved the mechanical performance of the diaphragm. Under the operating pressure of 0.3Mpa, the diaphragm ' s elasticity and hardness increased by 14.6% and 12.8%, respectively. Therefore, this study is of significance in popularizing PCE drip irrigation technology and marginal water utilization.

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