Effect of Mass Flow Rate of Working Fluid on Performance of Capillary Porous Wick Evaporator with Bayonet Tube for AMTEC

Abstract:

An axial symmetric invariable temperature phase change interface model is established to investigate numerically the effect of mass flow rate of working fluid on performance of capillary porous wick evaporator with bayonet tube for alkali metal thermal-to-electric converter (AMTEC) system. The numerical results reveal that the temperature of working fluid in the wick and liquid channel decreases with increasing the mass flow rate. The suitable structure of bayonet tube is dependent on the mass flow rate of working fluid. The bayonet tube having larger wall thermal resistance is selected for the smaller mass flow rate of working fluid, and vice versa. Also, the flow in the liquid channel is greatly affected by the mass flow rate of working fluid in comparison with the capillary porous wick evaporator without bayonet tube.

• Periodical: Applied Mechanics and Materials (Volumes 190-191)
• Pages: 1302-1305
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.190-191.1302
• Online since: July 2012
• Authors: Shuang Ying Wu, Bao Xi Cao, Lan Xiao, You Rong Li
• Keywords: Alkali Metal Thermal-to-Electric Converter (AMTEC), Capillary Porous Wick, Evaporator, Mass Flow Rate, Numerical Simulation, Working Fluid

References

[1] S.Y. Wu, L. Xiao, Y.D. Cao. A review on advances in alkali metal thermal to electric converters (AMTECs). International Journal of Energy Research, 2009, 33: 868-892.

DOI: 10.1002/er.1584

[2] M.S. El-Genk, J.M. Tournier. Performance comparison of potassium and sodium vapor anode, multi-tube AMTEC converters. Energy Conversion and Management, 2002, 43: 1931-(1951).

DOI: 10.1016/s0196-8904(01)00142-x

[3] M.S. El-Genk, J.C. King. Performance analyses of an Nb-1Zr/C-103 vapor anode multitube alkali-metal thermal-to-electric conversion cell. Energy Conversion and Management, 2001, 42: 721-739.

DOI: 10.1016/s0196-8904(00)00076-5

[4] S.Y. Wu, L. Xiao, Y.D. Cao, y.R. Li. A parabolic dish/AMTEC solar thermal power system and its performance evaluation. Applied Energy, 2010, 87: 452-462.

DOI: 10.1016/j.apenergy.2009.08.041

[5] E. Bazzo, R.R. Riehl. Operation characteristics of a small-scale capillary pumped loop. Applied Thermal Engineering, 2003, 23: 687-705.

DOI: 10.1016/s1359-4311(03)00017-6

[6] S.Y. Wu, B.X. Cao, L. Xiao, Y.R. Li. The role of bayonet tube on heat and mass transfer characteristics of capillary porous wick evaporator based on AMTEC. Advanced Materials Research, 2011, 268-270: 219-224.

DOI: 10.4028/www.scientific.net/amr.268-270.219

[7] W.R. Davis, J.K. Ferrell. Evaporative heat transfer of liquid potassium in porous media. In AIAA/ASME, Thermophysics and Heat transfer conference, Boston, Mass, USA, July15-17, (1974).

DOI: 10.2514/6.1974-719

[8] T. Kaya, J. Goldak. Numerical analysis of heat and mass transfer in the capillary structure of a loop heat pipe. International Journal of Heat and Mass Transfer, 2006, 49: 3211-3220.

DOI: 10.1016/j.ijheatmasstransfer.2006.01.028

[9] J. Li, G.P. Peterson. 3D heat transfer analysis in a loop heat pipe evaporator with a fully saturated wick. International Journal of Heat and Mass Transfer, 2011, 54: 564-574.

DOI: 10.1016/j.ijheatmasstransfer.2010.09.014