| Title |
Condensing Characteristics of Pin-finned Surfaces on Pool Boiling in FC-72 |
| Authors |
강상우(Sarng Woo Karng) ; 김서영(Seo Young Kim) |
| Keywords |
사각기둥핀 표면 ; 젖음 특성 ; 과열온도 ; 열적 충격 ; 배열간격 ; 이력현상 ; 이력 폭 Pin-finned surface ; Wetting characteristics ; Superheat ; Thermal shock ; Array spacing ; Hysteresis phenomena ; Hysteresis width |
| Abstract |
As the electronic industry rapidly develops, the heat flux from state-of-the-art electronics increases up to 10?W/㎡. For this reason, the development of a new cooling technology for high heat flux applications is strongly required. Recently, some cooling technologies using boiling and condensation of working fluid are being adopted to overcome such a technical barrier. In the present study, a smooth boiling surface (14×14 ㎟) was immersed in FC-72 and its vapor was condensed by four different types of condensation surfaces (30×30 ㎟ base). The condensing surfaces were composed of a smooth surface and 1×1 ㎟ pin-finned surfaces of 2 mm height with 0.3, 0.5 and 1 mm array spacing. Boiling and condensing characteristics were investigated in detail on their combinations of boiling and condensing surfaces. For a smooth boiling surface the results obtained showed that the pin-finned condensing surface with 1 mm array spacing yielded the best performance and the smooth condensation surface did the worst. Furthermore hysteresis phenomena could be reduced by using enhanced condensing surfaces. |