Passive dew collection could be a viable option as a source of irrigation water in arid areas. The plastic foil acting as a condensing surface plays a key role in the passive dew collection regime. A laboratory method for comparing various plastic foils for dew collection was prepared and tested. The focus was on creating a method for measuring the attributes affecting dew condensation and the flow of dew droplets on the measured surface. A low-density polyethylene foil designed for dew collection, white polyethylene plastic, black polyethylene plastic, and white polyvinyl chloride plastic were used as the test plastics. The laboratory dew yields were compared with model calculations. In addition, field trials were conducted in arid conditions in Maktau, Kenya, to compare with the laboratory measurement. Results from the hardware model tests were not reflected in the results obtained from the field conditions. The laboratory tests showed that the dew-harvesting quality of plastic foils is difficult to evaluate using the laboratory test rig. A more comprehensive evaluation regime requires tests performed in field conditions or further development of the test rig used here.

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比较用于收集露水的塑料箔：肯尼亚的实验室规模准备方法和现场试验

被动露水收集作为干旱地区灌溉水的来源可能是一个可行的选择。作为冷凝表面的塑料箔在被动露水收集机制中起着关键作用。准备并测试了一种用于比较各种塑料箔收集露水的实验室方法。重点是创建一种方法来测量影响露水凝结和被测表面上露滴流动的属性。测试塑料采用低密度聚乙烯薄膜收集露水、白色聚乙烯塑料、黑色聚乙烯塑料和白色聚氯乙烯塑料。将实验室露水产量与模型计算进行比较。此外，还在肯尼亚马克套的干旱条件下进行了田间试验，以与实验室测量结果进行比较。硬件模型测试的结果没有反映在从现场条件获得的结果中。实验室测试表明，使用实验室测试台很难评估塑料箔的集露质量。更全面的评估制度需要在现场条件下进行测试或进一步开发此处使用的测试台。