Affiliation:
1. Indonesia National Nuclear Energy Agency (BATAN)
2. University of Indonesia
Abstract
The Effect of gap size to counter current flow limitation (CCFL) in vertical rectangular channel was studied in this paper. Experiment was conducted by using two vertical plate with 1 mm, 2 mm, and 3 mm narrow gap. The initial temperature of plate was decided at 600oC. Flow rate and temperature of cooling water were controlled about 0.09 L/s and 90oC respectively. Non-dimensional superficial velocity for water is 0.05-0.09 and non-dimensional superficial velocity for vapor is 3.20-3.2. The result shows that the existence of CCFL in the vertical rectangular narrow channels. A new correlation for CCFL base on Wallis has been proposed.
Publisher
Trans Tech Publications, Ltd.
Reference12 articles.
1. E. Ishibashi and K. Nishikawa, Saturated boiling heat transfer in narrow spaces. Int. J. Heat and Mass Transfer. 12(8), (1969) 867-893.
2. Wallis, G.B., Karlin, A.S., Clark III, C.R., Bharathan, D., Hagi, Y., Richter, H.J., 1981. Countercurrent gas-liquid flow in parallel vertical tubes. International Journal of Multiphase Flow, Volume 7, pp.1-19.
3. Y. Chang and S.C. Yao, Critical heat flux of narrow vertical annuli with closed bottoms. Transactions of the ASME. 105 (1983) 192-195.
4. K. Mishima and H. Nishihara, Flooding velocities for counter current air-water flow in thin rectangular channels. Annual Report of the Reactor Research Institute, Kyoto University. 17 ( 1984) 1-14.
5. K. Mishima and H. Nishihara, The effect of flow direction and magnitude on CHF for low-pressure water in thin rectangular channels, Nuclear Engineering and Design. 86 (1985) 165-181.