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首页> 外文期刊>Heat Transfer Engineering >Perfluoropolyethers Coatings Design for Fouling Reduction on Heat Transfer Stainless-Steel Surfaces
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Perfluoropolyethers Coatings Design for Fouling Reduction on Heat Transfer Stainless-Steel Surfaces

机译：用于减少传热不锈钢表面结垢的全氟聚醚涂料设计

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摘要

The scope of this research is to obtain a film coating on stainless-steel surfaces in order to reduce the interaction between the metal surface and the precipitates, so as to mitigate fouling in heat exchangers. Perfuoropolyethers were used to obtain nano-range fluorinated layers in order to make hydrophobic the stainless-steel surfaces. A pilot plant with two identical heat exchangers was built to investigate the ability of the hydwphobic coating of preventing fouling. The heat exchangers, installed in parallel, operated at the same temperature and pressure conditions, namely, laminar flow regime and inlet flow temperatures of 291-293 K for cold streams and 313-333 K for hot streams. We compared the heat transfer performance of the two heat exchangers. After a 5-month operation, the decrease in the heat transferred was 56% for the coated heat exchanger and 62% for the uncoated heat exchanger. Moreover, the increase of heat transfer resistance due to scale on the uncoated heat exchanger, with respect to the coated one, was three times higher.
机译：该研究的范围是在不锈钢表面上获得薄膜涂层，以减少金属表面与沉淀物之间的相互作用，从而减轻热交换器中的结垢。为了使不锈钢表面具有疏水性，使用了全氟聚醚来获得纳米范围的氟化层。建立了具有两个相同热交换器的中试工厂，以研究疏水涂层防止结垢的能力。并联安装的热交换器在相同的温度和压力条件下运行，即冷流的层流状态和入口流温度为291-293 K，热流为313-333K。我们比较了两个热交换器的传热性能。在运行5个月后，对于涂层热交换器，传热减少为56％，对于未涂层热交换器为62％。而且，由于未涂覆的热交换器上的水垢引起的传热阻力的增加是涂覆的热交换器的三倍。

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  • 来源
    《Heat Transfer Engineering》 |2016年第4期|210-219|共10页
  • 作者

    VALERIA OLDANI; CLAUDIA L. BIANCHI; SERENA BIELLA; CARLO PIROLA; GIUSEPPE CATTANEO;

  • 作者单位

    Dipartimento di Chimica, Universita degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy;

    Dipartimento di Chimica, Universita degli Studi di Milano, Milano, Italy;

    Dipartimento di Chimica, Materiali e Ingegneria Chimica 'Giulio Natta,' Politecnico di Milano, Milano, Italy;

    Dipartimento di Chimica, Universita degli Studi di Milano, Milano, Italy;

    ST Special Tanks s.r.l., Annone di Brianza (LC), Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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