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首页> 外文会议>ASME international design engineering technical conferences and computers and information in engineering conference 2014 >DESIGN AND TESTING OF A LOW-COST AND LOW-MAINTENANCE DRIP IRRIGATION FILTRATION SYSTEM FOR MICRO-IRRIGATION IN DEVELOPING COUNTRIES
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DESIGN AND TESTING OF A LOW-COST AND LOW-MAINTENANCE DRIP IRRIGATION FILTRATION SYSTEM FOR MICRO-IRRIGATION IN DEVELOPING COUNTRIES

机译：发展中国家微灌低成本低维护滴灌过滤系统的设计与测试

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摘要

The cylindrical filters presently used in ＜1000 m~2 drip irrigation systems are frequently clogged, increasing pressure loss and lowering the flow rate through the filters. This work investigates the mechanisms for this clogging and proposes an alternative filtration design that would enable both more reliable and lower maintenance filtering. This proposed system is compatible with existing drip irrigation systems and could be made inexpensively with plastic bottle manufacturing equipment. To compare the proposed design to off-the-shelf options, a drip irrigation test setup was built to measure the pressure loss across different filters as particles accumulated. These experiments confirmed that pleated cartridge filters, with high effective surface area, incurred lower pressure losses than cylindrical filters. These tests revealed that the greatest reason for clogged performance was that filtered particles (not the cartridge filter itself) eventually restricted the flow of water through the system. This inspired the redesign of the filter housing such that the housing extended far below the filter, providing a catch basin away from the filter for the particles to settle. Fixing the filter independently of the bottom casing significantly improved the overall performance of the filtration system, reduced the maintenance requirement necessary from the user, and would enable inexpensive manufacturing via blow molding. This paper experimentally demonstrates that the cartridge filter inside the redesigned housing can filter out over 2 kg of sand while maintaining less than a . 03 bar pressure drop across the filter at a flow rate of 25 l/s.
机译：目前在＜1000 m〜2滴灌系统中使用的圆柱形过滤器经常被堵塞，从而增加了压力损失并降低了通过过滤器的流量。这项工作研究了这种堵塞的机理，并提出了一种替代性的过滤设计，该设计将使过滤更加可靠，维护成本更低。该提议的系统与现有的滴灌系统兼容，并且可以用塑料瓶制造设备廉价地制造。为了将建议的设计与现成的选项进行比较，建立了滴灌测试装置，以测量随着颗粒积累而在不同过滤器上的压力损失。这些实验证实，具有高有效表面积的折叠式筒式过滤器比圆柱形过滤器产生更低的压力损失。这些测试表明，造成性能堵塞的最大原因是过滤后的颗粒（而不是筒式过滤器本身）最终限制了水通过系统的流量。这启发了对过滤器外壳的重新设计，以使外壳延伸到过滤器下方很远的位置，从而提供了一个远离过滤器的集水盆，以使颗粒沉降。独立于底部壳体固定过滤器可显着改善过滤系统的整体性能，减少用户的维护需求，并通过吹塑实现廉价的制造。本文通过实验证明，重新设计的机壳内的筒式过滤器可以过滤掉2公斤以上的沙，同时保持小于1公斤的沙。以25 l / s的流速通过过滤器的03 bar压降。

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  • 会议地点 Buffalo NY(US)
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    Alison Greenlee; Timothy Murray; Victor Lesniewski; Mark Jeunnette; Amos G. Winter V;

  • 作者单位

    Photovoltaic Manufacturing Laboratory Department of Material Science and Engineering Massachusetts Institute of Technology Cambridge, Massachusetts;

    Sloan Automotive Lab Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge, Massachusetts;

    Comprehensive Initiative for Technology Evaluation Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge, Massachusetts;

    Hatsopoulos Microfuilidics Laboratory Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge, Massachusetts;

    Global Engineering and Research Laboratory Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge, Massachusetts;

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