Abstract




 
   

IJE TRANSACTIONS A: Basics Vol. 15, No. 4 (November 2002) 373-382   

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  A NUMERICAL MODELING OF A VARIABLE CONDUCTANCE THERMOSYPHON BY USE OF A BINARY MIXTURE
 
H. Shokohmand

Department of Mechanical Engineering, Tehran University
Tehran, Iran, hshokoh@me.ut.ac.ir
 
A. Hassani

Branch of Science and Research, Islamic Azad University
Tehran, Iran, ab.hassani@parsonline.net
 
( Received: November 19, 2001 – Accepted in Revised Form: October 10, 2002 )
 
 

Abstract    In this paper the steady state performance of a variable conductance heat pipe, which its working fluid consists of two components (R11+ R113) is modeled. The role of the liquid film momentum and axial normal stresses are considered by use of the mean property of mixture and the governing equations are solved by conventional numerical methods. The results of the present model have been compared with other numerical models and experimental works done by other investigators. The model presented could be used for optimization studies and design of variable conductance thermosyphons.

 

Keywords    Thermosyphon, Variable Conductance, Binary Mixture

 

References   

 
1. Katzoff, S., “Heat Pipes and Vapor Chambers for Thermal Control of Spacecraft: Thermophyics of Spacecraft and Planetary Bodies”, (Edited by G. B.Heller), Academic Pub., New York, (1947), 225-234.

2. Edwards, D. K. and Marcus, B. D., “Heat and Mass Transfer in the Vicinity of the Vapor-Gas Front in a Gas Loaded Heat Pipe”, Journal of Heat Transfer, Vol. 94,Ser. C, No. 2, (1972), 155-162.

3. Hijikata, K., Chen, S. J. and Tien, C. L., “Non-Condensable Gas Effect on Condensation in a Two-Phase Closed Thermosyphon”, International Journal of Heat and Mass Transfer, Vol. 27, No. 8, (1984), 1319-1325.

4. Bobco, R. P., “Variable Conductance Heat Pipes: a FirstOrder Model”, Journal of Thermophysics and Heat Transfer, Vol. 1., No. 1, (1987), 35-42.

5. Peterson, P. F. and Tien, C. L. “Numerical and Analytical Solutions for Two Dimensional Gas Distribution in Gas-Loaded Heat Pipes”, Journal of Heat Transfer, Vol. 111, (1989), 598-604.

6. Hijikata, K., Hasegawa, H. and Nagasaki, T., “A Studyon a Variable- Conductance Heat Pipe Using a binaryMixture”, Proceeding of the XXth. International Symposium of the International Center for Heat and Mass Transfer, Hemisphere, New York, (1988).

7. Tien, C. L., Rohani, A. R., “Theory of Two ComponentHeat Pipes”, Journal of Heat Transfer, Vol. 94, Ser. C,No. 4, (1972), 479-484.

8. Zuo, Z. J. and Gunnerson, F. S., ”Numerical Modeling of the Steady State Two- Phase Closed Thermosyphone”, Int. J. of Heat and Mass Transfer, Vol. 37, No. 17,(1994), 2715- 2722.

9. McCabe, L. and Smith, C., “Unit Operations of Chemical Engineering”, Third Edition, New York,(1983).

10. Takao, Nagasaki and Hijikata, K., ”A Numerical Study on a Variable Conductance Heat Pipe Using a BinaryMixture”, ASME/JSME Thermal Engineering Conference, ASME, Vol. 2, (1995), 423-430.





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