Construction, Evaluation, and Performance of a Water Condensation Test Unit

IF 1 Q3 ENGINEERING, MULTIDISCIPLINARY
Paraskevi Nanou, John Konstantaras, Athanasios Zarkadoulas, Pavlos K. Pandis, Nikolaos Vourdas, Vassilis N. Stathopoulos
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引用次数: 2

Abstract

The study of water condensation phenomena is important in order to evaluate the performance of materials and coatings employed in the fabrication of waste heat recovery units including heat exchangers, heat pipes, condensing economizers and related functional surfaces. Fast evaluation of lab-scale samples is important during research and development of coatings for wetting phenomena under controlled, reproducible, and stable humidity and temperature conditions of both sample and environment. To study these effects, we report on the construction of a lab-scale condensation chamber, along with its evaluation and benchmarking with superhydrophobic coatings on stainless steel using perfluorooctyl silane (PFOTS). A working unit has been successfully fabricated and applied in a highly responsive device capable of recording the condensation performance of flat specimens under controlled conditions. Sample temperature was maintained with 0.10 °C deviation. The humidity response time of the chamber is 17.2 s per degree of RH% while the maximum relative humidity variation is +/- 3.2%RH. The unit successfully delivered valuable data over hydrophillic, hydrophobic and superhydrophobic surfaces. Data useful for studying open research issues such the relationship of contact angle and condensation phenomena.
水凝结试验装置的构造、评估和性能
水冷凝现象的研究对于评价废热回收装置(包括热交换器、热管、冷凝省煤器和相关功能表面)中所用材料和涂层的性能具有重要意义。在涂料的研究和开发过程中,在可控的、可重复的、稳定的湿度和温度条件下,对实验室规模的样品进行快速评估是非常重要的。为了研究这些影响,我们报告了一个实验室规模的冷凝室的建设,以及它的评估和对标不锈钢上使用全氟辛基硅烷(PFOTS)的超疏水涂层。一个工作单元已经成功地制造和应用在一个高响应装置能够记录凝结性能的平面样品在受控条件下。样品温度保持0.10°C偏差。当相对湿度的最大变化为+/- 3.2%RH时,试验室的湿度响应时间为17.2 s /℃。该装置成功地提供了亲水、疏水和超疏水表面的宝贵数据。对研究诸如接触角与凝结现象的关系等开放性研究问题有用的数据。
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来源期刊
Advances in Science and Technology-Research Journal
Advances in Science and Technology-Research Journal ENGINEERING, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
27.30%
发文量
152
审稿时长
8 weeks
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