| Title |
A Study on Influence of Flow Boiling Heat Transfer on Fouling Phenomenon in Nanofluids |
| Authors |
Woojoong Kim ; Yongwoo Yang ; Younghun Kim ; Sungseek Park ; Namjin Kim |
| DOI |
http://dx.doi.org/10.6110/KJACR.2016.28.3.095 |
| Keywords |
탄소나노튜브 ; 나노유체 ; 유동 비등 열전달 ; 임계 열유속 ; 열전달 계수 Carbon nanotube ; Nanofluid ; Flow boiling heat transfer ; Critical heat flux ; Heat transfer coefficient |
| Abstract |
A boiling heat transfer is used in various industry such as power generation systems, heat exchangers, air-conditioning and refrigerations. In the boiling heat transfer system, the critical heat flux (CHF) is the important factor, and it indicated safety of the system. It has kept up studies on the CHF enhancement. Recently, it is reported the CHF enhancement, when working fluid used the nanofluid with high thermal properties. But it could be occurred nanoflouling phenomenon from nanoparticle deposition, when nanofluid applied the heat transfer system. And, it is reported that the safety and thermal efficiency of heat transfer system could decrease. Therefore, it is compared and analyzed to the CHF and the boiling heat transfer coefficient on effect of artificial nanofouling (coating) in oxidized multi-wall carbon nanotube nanofluids. As the result, the CHF of oxidized multi-wall carbon nanofluids and the CHF of artificial nanofouling in the nanofluids increased to maximum 99.2%, 120.88%, respectively. A boiling heat transfer coefficient in nanofluid increased to maximum 24.29% higher than purewater, but artificial nanofouling decreased to maximum -7.96%. |