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Multifunctional Nano Surface Treatments for In-Situ Improvement of Heat Exchanger Performance

Multifunctional Nano Surface Treatments for In-Situ Improvement of Heat Exchanger Performance
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Strategies to improve the heat transfer rate and efficiency of a power plant must carefully balance a trinity of factors: the overall capital expense associated with the technology, the ongoing savings during normal plant operations, and the downtime and labor required for installation and implementation. These economic concerns have slowed the adoption of protective and/or functional surface treatments in power plant operations; traditional epoxies used to prevent biofouling and scale deposition can only be applied to brand new equipment, and the coating will limit heat transfer due to its insulating nature and applied thickness. 

Product Number: 51219-225-SG
Author: Vinod Veedu
Publication Date: 2019
Industry: Coatings
$0.00
$20.00
$20.00

Strategies to improve the heat transfer rate and efficiency of a power plant must carefully balance a trinity of factors: the overall capital expense associated with the technology, the ongoing savings during normal plant operations, and the downtime and labor required for installation and implementation. These economic concerns have slowed the adoption of protective and/or functional surface treatments in power plant operations; traditional epoxies used to prevent biofouling and scale deposition can only be applied to brand new equipment, and the coating will limit heat transfer due to its insulating nature and applied thickness. Highly ordered, nanomaterial based superhydrophobic surface patterning can theoretically improve heat transfer rates significantly, but lacks the durability for field implementation. Oceanit’s presentation will highlight the potential of a novel surface treatment that blends the repellent behavior of nanomaterial thin surface treatments that have the durability of thicker epoxy resins. Three key advantages of nanocomposite surface treatments (NSTs) have been identified which separate it from existing coating systems: it is nominally applied at a thickness of less than 50µm, allowing it to have a minimal effect on thermal heat transfer as compared to typical antifouling coat. It is sufficiently hydrophobic such that it promotes highly efficient dropwise condensation but retains superior abrasion resistance and adhesion. Finally, NSTs are non-toxic, contains negligible amounts of VOCs, and is extremely easy to handle and apply, allowing for inplace, on-site application with minimal downtime required. These factors have allowed Oceanit NSTs to demonstrate significant improvements in a shell-and-tube exchanger field deployment.

Strategies to improve the heat transfer rate and efficiency of a power plant must carefully balance a trinity of factors: the overall capital expense associated with the technology, the ongoing savings during normal plant operations, and the downtime and labor required for installation and implementation. These economic concerns have slowed the adoption of protective and/or functional surface treatments in power plant operations; traditional epoxies used to prevent biofouling and scale deposition can only be applied to brand new equipment, and the coating will limit heat transfer due to its insulating nature and applied thickness. Highly ordered, nanomaterial based superhydrophobic surface patterning can theoretically improve heat transfer rates significantly, but lacks the durability for field implementation. Oceanit’s presentation will highlight the potential of a novel surface treatment that blends the repellent behavior of nanomaterial thin surface treatments that have the durability of thicker epoxy resins. Three key advantages of nanocomposite surface treatments (NSTs) have been identified which separate it from existing coating systems: it is nominally applied at a thickness of less than 50µm, allowing it to have a minimal effect on thermal heat transfer as compared to typical antifouling coat. It is sufficiently hydrophobic such that it promotes highly efficient dropwise condensation but retains superior abrasion resistance and adhesion. Finally, NSTs are non-toxic, contains negligible amounts of VOCs, and is extremely easy to handle and apply, allowing for inplace, on-site application with minimal downtime required. These factors have allowed Oceanit NSTs to demonstrate significant improvements in a shell-and-tube exchanger field deployment.

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