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Amorphous silica nanosprings: a candidate for improving condensation heat transfer performance.

Number: pap. n. 1772

Author(s) : SCHMIESING N. C., SOMMERS A. D., CORTI G.

Summary

In this work, heat transfer data are presented for water vapor condensing on the outside of aluminum tubes in a purpose-built environmental chamber. Testing was performed both before and after coating the tube with an amorphous silica nanospring coating of prescribed thickness. Silica nanosprings offer several advantages over other one-dimensional nanostructures including high surface area (350 m2 g-1), mild growth conditions (350°C and atmospheric pressure), thermal stability <1000°C in air, innate
hydrophilicity, and photolithography compatibility. Depending on the functionalization that is performed, either hydrophilic or super-hydrophobic conditions can be achieved. Special focus is given to baseline testing, benchmarking the experimental setup, and the performance of the silica nanospring coating. Data are interpreted in terms of coating thickness, wettability, and other environmental factors with the overall aim of improving condensation heat transfer performance.

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Pages: 8

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Details

  • Original title: Amorphous silica nanosprings: a candidate for improving condensation heat transfer performance.
  • Record ID : 30026768
  • Languages: English
  • Source: Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Publication date: 2019/08/24
  • DOI: http://dx.doi.org/10.18462/iir.icr.2019.1772
  • Notes:

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