Share This Article:

Mechanism Analysis on Stress Accumulation in Cylindrical Vertical-Placed Metal Hydride Reactor

Abstract Full-Text HTML Download Download as PDF (Size:635KB) PP. 490-498
DOI: 10.4236/epe.2011.34059    4,070 Downloads   6,713 Views   Citations


It’s known that the pulverization-densification mechanism of metal hydride may cause the stress accumulation in metal hydrides reactors. In this paper, this idea is proved based on granulometry and a new idea of cycling compression effect is presented, which is caused by the friction between wall and metal hydrides. Through theoretical analysis, the cycling compression effects is shown to increase the localized packing rate from top to down in vertical-placed reactors and thus lead to the maximum deformation in the bottom of reactors, proving that it is the interaction of pulverization-densification effect and cycling compression effect resulting in the stress problems of vertical-placed reactors. Further study points that the effective methods relieving the cycling compress effect are to decrease hydrogen absorption/desorption cycle number, slenderness ratio of reactor, wall friction factor and initial packing rate, or to lower the thermal conductivity and the volume expansion coefficient of metal hydrides.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

X. Hu, Z. Qi, F. Qin and J. Chen, "Mechanism Analysis on Stress Accumulation in Cylindrical Vertical-Placed Metal Hydride Reactor," Energy and Power Engineering, Vol. 3 No. 4, 2011, pp. 490-498. doi: 10.4236/epe.2011.34059.


[1] Y. Nakamura, K. Sato, S. Fujitani, K. Nishio, K. Oguro, I. Uehara, “Lattice expanding behavior and degradation of LaNi5-based alloys,” Journal of Alloys and Compounds, Vol. 267, 1998, pp. 205-210.
[2] B. Y. Ao, S. X. Chen, G. Q. Jiang, “A study on wall stresses induced by LaNi5 alloy hydrogen absorption–desorption cycles,” Journal of Alloys and Compounds, Vol. 390, 2005, pp. 122-126
[3] K. Nasako, Y. Ito, N. Hiro, M. Osumi, “Stress on a reaction vessel by the swelling of a hydrogen absorbing alloy,” Journal of Alloys and Compounds, Vol. 264, 1998, pp. 271-276.
[4] QD Wang, J Wu, CP Chen, ZP Li, “An investigation of the mechanical behavior of hydrogen storage metal beds on hydriding and dehydriding and several methods of preventing the damage of hydride containers caused by the expansion of hydrogen storage metals,” Journal of the Less-Common Metals, Vol. 131, 1987, pp. 399-407.
[5] T. Saito, K. Suwa, T. Kawamura, “Influence of expansion of metal hydride during hydriding–dehydriding cycles,” Journal of Alloys and Compounds, Vol. 253-254, 1997, pp. 682-685.
[6] K. Nasakao, Y. Ito, N. Hirot, M. Osumit, “Relaxation of internal stress generated in hydrogen absorbing alloy vessels,” International Journal of Hydrogen Energy, Vol. 23, 1998, pp. 921-929.
[7] F. T. Block, A. Dey, H. Kappes, K. Reith, “Hydrogen purification with metal hydrides in a new kind of reactor,” Journal of the Less-Common Metals, Vol. 131, 1987, pp. 329-335.
[8] O. Bernauer, C. Halene, “Properties of metal hydrides for use in industrial applications,” Journal of the Less- Common Metals, Vol. 131, 1987, pp. 213-224.
[9] MSC. Software Corporation, “MSC.Marc Volume A: Theory and User Information,” Santa Ana, MSC. Software Corporation, 2004.
[10] Ram Gopal M, Srinivasa Murthy S, “Experiments on a metal hydride cooling system working with ZrMnFe/ MmNi4.5Al0.5pair,” International Journal of Refrigeration, Vol. 22, 1999, pp. 137-149.
[11] F Qin, LH Guo, JP Chen, ZJ Chen, “Pulverization, expansion of La0.6Y0.4Ni4.8Mn0.2 during hydrogen absorption–desorption cycles and their influences in thin-wall reactors,” International Journal of Hydrogen Energy, Vol. 33, 2008, pp. 709-717.

comments powered by Disqus

Copyright © 2020 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.