| Title |
Influence of Spring on The Absorption Performance of a Vertical Absorber Tube |
| Keywords |
Spring ; 스프링 ; Vertical falling film absorber ; 수직형 유하액막 흡수기 ; LiBr-H2O solution ; 리튬브로마이드 수용액 |
| Abstract |
The present study investigated the enhancement of the absorption performance by the spring wrapped around the outer surface of the vertical falling film absorber tube. Heat and mass transfer enhancements were experimentally investigated, and flow visualization was performed to observe the wettability and flow pattern of the solution. The key experimental parameters were spring diameter(0.5,1.0mm) and spring pitch(1,3,10mm), film Reynolds number(50～150), and concentration of LiBr-H2O solution(55, 60, 65wt%). As the spring diameter was increased, the absorption mass flux, Sherwood number, Nusselt number, heat flux, and heat transfer coefficient were increased The Nusselt and Sherwood numbers showed the maximum at the spring pitch of 3mm, and the ratio of pitch to diameter of approximately 3 and 6 for the spring diamter of 0.5mm, respectively. |