SET Proceedings 2978-4387 Caravel Press 10.65582/set.2008.095 2008.095 Bubble Pump used in Passive Solar Water Heater System LiXuesong lixuesong19840624@yahoo.com.cn ChungHanShik hschung@gnu.ac.kr JeongHyoMin hymjeong@gnu.ac.kr Department of Mechanical and Precision Engineering, Gyeongsang National University, Tongyeong, Korea School of Mechanical and Aerospace Engineering, Gyeongsang National University, Tongyeong, Korea 24082008 7 1 978-1-995850-08-5 738 744 24 August 2008 © 2008 Copyright WSSET 2008

The problem was derived from a simple process in solar water heating system. In a new designed electric less split system we involved a kind of bubble pump. The main structure of bubble pump was design depend on the character of two phase flow. Beside experiment analysis, numerical simulation of this pumping action in the core tube of bubble pump is very important. In this paper we investigated the motion of bubbles in vertical tube in two dimensions. The testing experiment has been taken on the existed vacuum tube on the efficiency, temperature, pressure and circulates power. The heat and mass transfer was simulated. The result of numerical simulation gave worthful help of optimize design of bubble pump. The optimal dimension design of core tube inside of bubble pump is presented.

 bubble simulation solar water heater two phases flow 24 to 27 August 2008 7th International Conference on Sustainable Energy Technologies SET2008 7 Seoul, Korea Wallis G. B, 1969, “One Dimensional Two-Phase Flow”, McGraw Hill, New York. Chisholm D., 1983, “Two-phase Flow in Pipelines and Heat Exchangers ” , George Godwin, London and New York. Bahomed TO, 1995, "Thermal Modeling of The Bubble Pumped Solar Domestic Hot Water System" Master’s thesis, Dept. of Mechanical Engineering, Queen’s University, Canada. Cataford RJ, Harrison SJ, 1988, "Performance Monitoring of a Bubble Pumped SDHW System", Proceeding of the Solar ‘'88 conference, June 1988, MIT, Cambridge, Mass., pp. 485-490. DeBeni G, Friesen R, 1985, "Passive Downward Heat Transport: Experimental Results of a Technical Unit. Solar Energy", Vol. 34, No. 2, pp. 127-134. Hoffman EW, 1985, "The Bubble Action Pump Solar Heating System", Montreal, Canada. Sorensen W, 1987, "The Bubble Pumped D.H.W. System", ISES Solar World Congress, Hamburg, F.R.G. Zhang, J.P., Grace, J.R., Epstein, N., Lim, K.S., 1997. Flow regime identification in gas−liquid flow and three-phase fluidized beds. Chemical Engineering Science, 52, 3979−3992. T. Funada, D.D. Joseph, T. Maehara, S. Yamashita, Ellipsoidal model of the rise of a Taylor bubble in a round tube. In J Multiphase flow, Shizuoka, Japan