年間 8 号発行
ISSN 印刷: 1065-5131
ISSN オンライン: 1563-5074
Indexed in
Effects of Surface Coating on the Critical Heat Flux for Pool Boiling from a Downward Facing Surface
要約
As part of a joint U.S.−Korean International Nuclear Engineering Research Initiative investigating methods to enhance external reactor vessel cooling (ERVC) under severe accident conditions, it was proposed that surface coating be used to enhance the critical heat flux (CHF) for downward facing boiling. Toward this end, metallic microporous coatings were selected, and different compositions of the coating material were evaluated, in order to obtain a mixture with desirable qualities. Durability and adhesion tests were also done to study the performance of each of the resulting coatings. Quenching of the candidate coatings was then conducted under downward facing boiling conditions, using hemispherical test vessels to obtain the local boiling curves. Compared to a plain vessel surface under identical experimental conditions, considerable enhancement was observed in the critical heat flux for vessels with surface coatings. Optical and SEM (Scanning Electron Microscope) photos showed that the candidate coating possessed the desired porous microstructure with interconnecting channels and pores, leading to appreciable increases in the local CHF limits.
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Yu Hongxing, Zhang Yapei, Su Guanghui, Qiu Suizheng, Tian Wenxi, A theoretical CHF model for downward facing surfaces and gaps under saturated boiling, International Journal of Multiphase Flow, 45, 2012. Crossref
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Liu Chien-Fu, Yang Chien-Yuh, Effect of space distance for boiling heat transfer on micro porous coated surface in confined space, Experimental Thermal and Fluid Science, 50, 2013. Crossref
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Yang Chien-Yuh, Liu Chien-Fu, Effect of coating layer thickness for boiling heat transfer on micro porous coated surface in confined and unconfined spaces, Experimental Thermal and Fluid Science, 47, 2013. Crossref
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Jun Seongchul, Kim Jinsub, Son Donggun, Kim Hwan Yeol, You Seung M., Enhancement of Pool Boiling Heat Transfer in Water Using Sintered Copper Microporous Coatings, Nuclear Engineering and Technology, 48, 4, 2016. Crossref
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Jun Seongchul, Kim Jinsub, You Seung M., Kim Hwan Yeol, Effect of heater orientation on pool boiling heat transfer from sintered copper microporous coating in saturated water, International Journal of Heat and Mass Transfer, 103, 2016. Crossref
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Lee Min Ho, Heo Hyo, Bang In Cheol, Effect of thermal activity on critical heat flux enhancement in downward-hemispherical surface using graphene oxide coating, International Journal of Heat and Mass Transfer, 127, 2018. Crossref
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Saha Sujoy Kumar, Ranjan Hrishiraj, Emani Madhu Sruthi, Bharti Anand Kumar, Pool Boiling Enhancement Techniques, in Two-Phase Heat Transfer Enhancement, 2020. Crossref
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Amidu Muritala Alade, Olatubosun Samuel Abiodun, Ayodeji Abiodun, Addad Yacine, Severe accident in high-power light water reactors: Mitigating strategies, assessment methods and research opportunities, Progress in Nuclear Energy, 143, 2022. Crossref
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