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Water condensation and droplet shedding behavior on silica nanospring coated tubes.

Number: 2355

Author(s) : CHAMBERLIN J. P., CORTI G., SOMMERS A. D.

Summary

In this work, an amorphous silica nanospring (SN) coating is considered as a method to induce hydrophobicity and dropwise condensation on aluminum tubes for both water and methanol. Silica nanosprings offer several advantages over other one-dimensional nanostructures including high surface area (350 m2 g-1), mild growth conditions (350°C, atmospheric pressure), and thermal stability (< 1000°C in air). Special focus in this work will be given to baseline
testing and the performance of functionalized SN tubes. Testing to investigate the performance of SN-coated tubes and compare against the performance of uncoated tubing will be conducted in a purpose-built environmental chamber. In order to increase the amount of heat transfer possible within this chamber, 3D-printed fluid-carrying manifolds were designed to significantly increase the amount of available tube surface area. Two different methods of calculating condensation heat transfer coefficients from collected data are compared. Additionally, the existence of an ideal SN coating thickness for maximizing heat transfer and condensation rate is investigated. Future work will focus on using the printed and optimized manifolds to collect data from both a set of uncoated and sets of SN-coated tubes.

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Pages: 10

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Details

  • Original title: Water condensation and droplet shedding behavior on silica nanospring coated tubes.
  • Record ID : 30028468
  • Languages: English
  • Subject: Technology
  • Source: 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2021/05
  • Document available for consultation in the library of the IIR headquarters only.

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