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首页> 外文会议>Annual International Meeting of the American Society of Agricultural and Biological Engineers >Model to Increase the Lateral Line Length of DripIrrigation Systems
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Model to Increase the Lateral Line Length of DripIrrigation Systems

机译：模型增加滴定系统的横向线长度

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Non-pressure compensating drip hose is widely used for irrigation of vegetables and orchards. One limitation is that the lateral line length must be short to maintain uniformity due to head loss and slope. Any procedure to increase the length is appropriate because it represents low initial cost of the irrigation system.The hypothesis of this research is that it is possible to increase the lateral line length combining two points: using a larger spacing between emitters at the beginning of the lateral line and a smaller one after a certain distance; and allowing a higher pressure variation along the lateral line under an acceptable value of distribution uniformity. To evaluate this hypothesis, a nonlinear programming model (NLP) was developed. The input data are: diameter, roughness coefficient, pressure variation, emitter operational pressure, relationship between emitter discharge and pressure. The output data are: line length, discharge and length of the each section with different spacing between drippers, total discharge in the lateral line, multiple outlet adjustment coefficient, head losses, localized head loss, pressure variation, number of emitters, spacing between emitters, discharge in each emitter, and discharge per linear meter.The mathematical model developed was compared with the lateral line length obtained with the algebraic solution generated by the Darcy-Weisbach equation. The NLP model showed the bestresults since it generated the greater gain in the lateral line length, maintaining the uniformity and the flow variation under acceptable standards. It had also the lower flow variation, so its adoption is feasible and recommended.
机译：非压力补偿滴水软管广泛用于蔬菜和果园的灌溉。一个限制的是，由于头部损耗和斜坡，横向线长度必须短路以保持均匀性。增加长度的程序是合适的，因为它代表了灌溉系统的初始成本。该研究的假设是可以增加两个点的横向线长度：在开始时使用更大的发射器之间的间隔一定距离后横向线和较小的线;并在可接受的分布均匀性值下允许沿着横向线更高的压力变化。为了评估该假设，开发了非线性规划模型（NLP）。输入数据是：直径，粗糙度系数，压力变化，发射极操作压力，发射极排出和压力之间的关系。输出数据是：滴管之间具有不同间距的线宽，放电和长度，横向线的总放电，多个出口调整系数，头部损耗，局部头部损耗，压力变化，发射器的数量，发射器之间的间距，在每个发射器中放电，并每线性仪表放电。与由Darcy-Weisbach方程产生的代数溶液一起获得的横向线长度进行了比较的数学模型。 NLP模型显示出BestResults，因为它在横向线长度中产生了更大的增益，维持在可接受的标准下的均匀性和流动变化。它还具有较低的流动变化，因此其采用是可行的，推荐。

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