Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency

Niazi, Soroush and Khalili Sadaghiani, Abdolali and Gharıb, Ghazaleh and Kaya, Veysel Ogulcan and Çelik, Süleyman and Kutlu, Özlem and Koşar, Ali (2021) Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency. Energy, 222 . ISSN 0360-5442 (Print) 1873-6785 (Online)

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Abstract

Due to growing cooling demands as well as emerging global warming and climate change issues, cooling systems should be more efficiently utilized. Boiling is an effective heat transfer mechanism, which has a critical role in many cooling systems. Surface modification is considered as the major approach for boiling heat transfer enhancement. In this study, we developed a microbial bio-coating surface modification technique for phase change cooling applications. Thermoacidophilic Sulfolobus solfataricus coating was implemented using a facile dip coating method on different metallic and non-metallic surfaces. Controlled by drying conditions, the coating exhibited rough and porous morphologies. When tested in a boiling heat transfer setup, bio-coated surfaces offered enhancements up to 76.3% in Critical Heat Flux (CHF). Next, a miniature evaporator was coated and tested for real-world air-conditioning applications, and coefficient of performance (COP) enhancements up to 11% clearly revealed the potential of bio-coated surfaces for energy saving purpose and reduction in greenhouse gasses. Furthermore, coated evaporators reduced the exergy destruction rate up to 8%. This study not only offers a new type of coating morphology, but the applicability of the proposed bio-coating is also proven in a miniature air conditioning system.
Item Type: Article
Uncontrolled Keywords: Bio-coating, Heat transfer enhancement, Environmentally friendly coatings, Electronics cooling, Air conditioning system, Energy and exergy efficiency
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TP Chemical technology
T Technology > T Technology (General) > T174.7 Nanotechnology
Divisions: Center of Excellence on Nano Diagnostics
Faculty of Engineering and Natural Sciences > Academic programs > Mechatronics
Sabancı University Nanotechnology Research and Application Center
Faculty of Engineering and Natural Sciences
Depositing User: Abdolali Khalili Sadaghiani
Date Deposited: 21 Aug 2021 13:08
Last Modified: 21 Aug 2021 13:08
URI: https://research.sabanciuniv.edu/id/eprint/41800

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