Micro/Nanoscale surface modifications to combat heat exchanger fouling

Goswami, A.; Pillai, Suresh C.; McGranaghan, Gerard

doi:10.1016/j.ceja.2023.100519

Cited by 11 publications

(2 citation statements)

References 224 publications

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“…These nanoparticles facilitate substantial improvement in heat transfer efficiency due to an increased total surface area and enhanced thermal conductivity. The extent of heat transfer improvements varies depending on the shape and size of these nanoparticles [106]. Additionally for geothermal applications, nanofluids contribute to the cooling of pipes that transport heat from the Earth's crust.…”

Section: Coating Materials and Performancementioning

confidence: 99%

A Review on Geothermal Heat Exchangers: Challenges, Coating Methods, and Coating Materials

Bhuvanendran Nair Jayakumari,

Malik,

Mittal

et al. 2023

Coatings

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Geothermal energy is likely to be a significant contributor in achieving sustainable energy goals and net-zero emissions targets. Within geothermal power plants, heat exchangers play a critical role in harnessing this renewable energy source. However, these heat exchangers encounter significant challenges when exposed to geothermal fluids, including erosion, corrosion, and scaling, which adversely affects their performance and longevity. The current review focuses on surface engineering techniques, particularly coatings, as a highly effective and economically viable solution to address these challenges in geothermal heat exchangers. The review begins by providing an overview of geothermal energy, its significance in the context of sustainability and the important role played by heat exchangers in geothermal power generation, followed by the challenges and their impact on heat exchangers. The subsequent section focuses on surface engineering by coatings and its types employed to enhance the performance of heat exchangers. In the final part, the reader is presented with an overview of the challenges associated with the application of coatings in geothermal heat exchangers and potential future directions in this field. This review offers a detailed understanding of the critical role coatings play in improving the efficiency and service life of heat exchangers in geothermal power plants.

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Section: Coating Materials and Performancementioning

confidence: 99%

A Review on Geothermal Heat Exchangers: Challenges, Coating Methods, and Coating Materials

Bhuvanendran Nair Jayakumari,

Malik,

Mittal

et al. 2023

Coatings

View full text Add to dashboard Cite

show abstract

“…Due to their high thermal conductivity and higher convective heat transfer coefficients, nanofluids can improve heat transmission [182,183]. The flow behavior and heat transfer properties inside the micro/nano heat exchanger can also be affected by surface modifications with hydrophilic or hydrophobic coatings [184,185].…”

Section: Micro/nano Heat Exchangermentioning

confidence: 99%

A Review of Nano and Microscale Heat Transfer: An Experimental and Molecular Dynamics Perspective

Chatterjee,

Paras,

et al. 2023

Processes

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Significant progress in the development of micro and nanoscale devices has been observed for the past three decades. The thermal transportation in these small-length scales varies significantly, and it is difficult to explain the underlying physics using the pre-existing theoretical formulations. When the bulk dimension of a system is comparable to or smaller than the mean free path (MFP) of the thermal carriers, classical theories, such as Fourier’s Law of heat conduction, are unable to accurately explain the system energy dynamics. The phenomena of energy transit and conversion at the micro to nanoscale is an interesting topic of research due to the substantial changes in behavior that are documented when compared to those at the macro size. This review article is broadly divided into two parts. Initially, the recent development in the field of molecular dynamic (MD) simulations is emphasized. Classical MD simulation is such a powerful tool that provides insight into the length scales where the conventional continuum approaches cease to be valid. Several examples of recent developments in the applicability of MD simulations for micro and nanoscale thermal transportation are reviewed. However, there are certain limitations of the MD simulations where the results deviate from experimental validation due to the lack of knowledge of the appropriate force fields. Hence the experimental development of micro and nanoscale thermal transportation processes is briefly reviewed and discussed in the other section of this review article.

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Nanoengineering Scalephobic Surfaces for Liquid Cooling Enhancement

Schmid,

Armstrong,

Denz

et al. 2024

Adv Materials Inter

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Crystallization fouling, a process where mineral scales form on surfaces, is of broad importance in nature and technology, negatively impacting water treatment and electricity production. However, a rational methodology for designing materials with intrinsic resistance to scaling and scale adhesion remains elusive. Here, guided by nucleation physics, this work investigates the effect of coating composition and surface structure on the nucleation and growth mechanism of scale on metallic heat transfer surfaces nanoengineered by large‐area techniques. This work observes that on hydrophilic nanostructured copper, despite its significantly enlarged surface area compared to smooth surfaces, scale formation is substantially suppressed leading to sustained, efficient cooling performance. This work reveals the mechanism through thermofluidic modeling coupled with in situ optical characterization and show that surface bubble formation through degassing is responsible for generating local hot spots enhancing supersaturation. This work then demonstrates a scalephobic nanostructured surface which reduces the accumulated surface scale mass 3.5× and maintains an 82% higher heat transfer coefficient compared to superhydrophobic surfaces with corresponding energy conversion savings. This work not only advances the understanding of fouling mechanisms but also holds promise for practical applications in industries reliant on efficient heat transfer processes.

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Micro/Nanoscale surface modifications to combat heat exchanger fouling

Cited by 11 publications

References 224 publications

A Review on Geothermal Heat Exchangers: Challenges, Coating Methods, and Coating Materials

A Review on Geothermal Heat Exchangers: Challenges, Coating Methods, and Coating Materials

A Review of Nano and Microscale Heat Transfer: An Experimental and Molecular Dynamics Perspective

Nanoengineering Scalephobic Surfaces for Liquid Cooling Enhancement

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