Search for: [Authors = "Hoang, Manh"]

Search results

Number of results: 2

items per page: 25 50 75

Sort by:

of 1

Less Commonly Used Membrane Desalination Technologies

Brian Bolto Manh Hoang Thuy Tran

Archives of Environmental Protection | 2008 | vol. 34 | No 3 | 5-16

Keywords Membrane distillation forward osmosis desalination draw solutions solar energy

Download PDF Download RIS Download Bibtex

Abstract

The literature on membrane distillation and forward osmosis for treating natural and recovered wastewaters is reviewed. There is renewed interest in these membrane technologies as alternatives to pressure driven processes such as reverse osmosis, which are expensive in both capital and energy, and generally require pre-treatment of the feed water. Membrane distillation with hydrophobic microfiltration membranes can make use of low-grade heat energy, and give higher yields of product water from concentrated feed waters. Forward osmosis uses hydrophilic membranes akin to reveres osmosis, and needs a draw solution that is appropriate in the product water. or must be recovered and reused in large-scale operation. Although they show great promise as simple low energy systems, no large-scale installation of either process exists as yet. Membrane distillation has considerable potential for desalination to produce drinking water, whereas FO is currently confined to small-scale systems, especially as a source of energy drinks in emergency situations.

Go to article

Authors and Affiliations

Brian Bolto

Manh Hoang

Thuy Tran

Design and performance analysis of a mechanically coupled spring compliant to out-of-plane oscillation

Duong Van Nguyen Chien Quoc Nguyen Hieu Van Dang Hoang Manh Chu

Archive of Mechanical Engineering | 2022 | vol. 69 | No 4 | 629-643 | DOI: 10.24425/ame.2022.141520

Keywords coupled spring mode coupling serpentine spring Sigitta spring theory finite element method

Download PDF Download RIS Download Bibtex

Abstract

In this paper, a spring system symmetrically arranged around a circular plate compliant to out-of-plane oscillation is proposed. The spring system consists of single serpentine springs mutually coupled in a plane. Three theoretical mechanical models for evaluating the stiffness of the spring system are built, which are based on the flexural beam, Sigitta, and serpentine spring theories and equivalent mechanical spring structure models. The theoretically calculated results are in good agreement with numerical solutions using the finite element method, with errors less than 10% in the appropriate dimension ranges of the spring. Compared to similar spring structures without mechanical coupling, the proposed mechanically coupled spring shows advantage in suppressing the mode coupling.

Go to article

Bibliography

[1] X. Liu, K. Kim, and Y. Sun. A MEMS stage for 3-axis nanopositioning. Journal of Micromechanics and Microengineering, 17(9):1796–1802, 2007. doi: 10.1088/0960-1317/17/9/007.
[2] R. Legtenberg, A.W. Groeneveld, and M. Elwenspoek. Comb-drive actuators for large displacements. Journal of Micromechanics and Microengineering, 6(3):320–329, 1996. doi: 10.1088/0960-1317/6/3/004.
[3] S. Abe, M.H. Chu, T. Sasaki, and K. Hane. Time response of a microelectromechanical silicon photonic waveguide coupler switch. IEEE Photonics Technology Letters, 26(15):1553–1556, 2014. doi: 10.1109/lpt.2014.2329033.
[4] T.Q. Trinh, L.Q. Nguyen, D.V. Dao, H.M. Chu, and H.N. Vu, Design and analysis of a z-axis tuning fork gyroscope with guided-mechanical coupling. Microsystem Technologies, 20(2):281–289, 2014. doi: 10.1007/s00542-013-1947-0.
[5] Y.J. Huang, T.L. Chang, and H.P. Chou. Novel concept design for complementary metal oxide semiconductor capacitive z-direction accelerometer. Japanese Journal of Applied Physics, 48(7):076508, 2009. doi: 10.1143/jjap.48.076508.
[6] A. Sharaf and S. Sedky. Design and simulation of a high-performance Z-axis SOI-MEMS accelerometer. Microsystem Technologies, 19(8):1153–1163, 2013. doi: 10.1007/s00542-012-1714-7.
[7] Y. Matsumoto, M. Nishimura, M. Matsuura, and M. Ishida. Three-axis SOI capacitive accelerometer with PLL C–V converter. Sensors and Actuators A: Physical, 75(1):77–85, 1999. doi: 10.1016/s0924-4247(98)00295-7.
[8] D. Peroulis, S.P. Pacheco, K. Sarabandi, and L.P.B. Katehi. Electromechanical considerations in developing low-voltage RF MEMS switches. IEEE Transactions on Microwave Theory and Techniques, 51:259–270, 2003. doi: 10.1109/TMTT.2002.806514.
[9] Y. Liu. Stiffness Calculation of the microstructure with crab-leg flexural suspension. Advanced Materials Research, 317-319:1123–1126, 2011. doi: 10.4028/www.scientific.net/AMR.317-319.1123.
[10] H.M. Chou, M.J. Lin, and R. Chen. Investigation of mechanics properties of an awl-shaped serpentine microspring for in-plane displacement with low spring constant-to-layout area. Journal of Micro/Nanolithography MEMS and MOEMS, 15(3):035003, 2016. doi: 10.1117/1.JMM.15.3.035003.
[11] D.V. Hieu, L.V. Tam, N.V. Duong, N.D. Vy, and C.M. Hoang. Design and simulation analysis of a z axis microactuator with low mode cross-talk. Journal of Mechanics, 36(6):881–888, 2020. doi: 10.1017/jmech.2020.48.
[12] D.V. Hieu, L.V. Tam, K. Hane, and M.H. Chu. Design and simulation analysis of an integrated XYZ micro-stage for controlling displacement of scanning probe. Journal of Theoretical and Applied Mechanics, 59(1):143–156, 2021. doi: 10.15632/jtam-pl/130549.
[13] F. Hu, W. Wang, and J. Yao. An electrostatic MEMS spring actuator with large stroke and out-of-plane actuation. Micromechanics and Microengineering, 21(11):115029, 2011. doi: 10.1088/0960-1317/21/11/115029.
[14] W. Wai-Chi, A.A. Azid, and B.Y. Majlis. Formulation of stiffness constant and effective mass for a folded beam. Archives of Mechanics, 62(5):405–418, 2010.
[15] Y. Cao and Z. Xi. A review of MEMS inertial switches. Microsystem Technologies, 25(12):4405–4425, 2019. doi: 10.1007/s00542-019-04393-4.
[16] K.R. Sudha, K. Uttara, P.C. Roshan, and G.K. Vikas. Design and analysis of serpentine based MEMS accelerometer. AIP Conference Proceedings, 1966:020026, 2018. doi: 10.1063/1.5038705.
[17] H.M. Chou, M.J. Lin, and R. Chen. Fabrication and analysis of awlshaped serpentine microsprings for large out-of-plane displacement. Journal of Micromechanics and Microengineering, 25:095018, 2015. doi: 10.1088/0960-1317/25/9/095018.
[18] C.M. Hoang, and K. Hane. Design fabrication and vacuum operation characteristics of two-dimensional comb-drive micro-scanner. Sensors and Actuators A: Physical, 165(2): 422–430, 2011. doi: 10.1016/j.sna.2010.11.004.
[19] G. Barillaro, A. Molfese, A. Nannini, and F. Pieri. Analysis simulation and relative performances of two kinds of serpentine springs. Journal of Micromechanics and Microengineering, 15(4):736–746, 2005. doi: 10.1088/0960-1317/15/4/010.
[20] P.B. Chu, I. Brener, C. Pu, S.S. Lee, J.I. Dadap, S. Park, K.Bergman et al. Design and nonlinear servo control of MEMS mirrors and their performance in a large port-count optical switch. Journal of Microelectromechanical Systems, 14(2):261–273, 2005. doi: 10.1109/JMEMS.2004.839827.
[21] G.D.J. Su, S.H. Hung, D. Jia, and F. Jiang. Serpentine Spring corner designs for micro-electro-mechanical systems optical switches with large mirror mass. Optical Review, 12(4):339–344, 2005. doi: 10.1007/s10043-005-0339-9.
[22] A. Khlifi, A. Ahmed, S. Pandit, B. Mezghani, R. Patkar, P. Dixit, and M.S. Baghini. Experimental and theoretical dynamic investigation of MEMS Polymer mass-spring systems. IEEE Sensors Journal, 20(19):11191–11203, 2020. doi: 10.1109/JSEN.2020.2996802.
[23] J. Wu, T. Liu, K. Wang, and K. Sørby. A measuring method for micro force based on MEMS planar torsional spring. Measurement Science and Technology, 32(3):035002, 2020. doi: 10.1088/1361-6501/ab9acd.
[24] Z. Rahimi, J. Yazdani, H. Hatami, W. Sumelka, D. Baleanu, and S. Najafi. Determination of hazardous metal ions in the water with resonant MEMS biosensor frequency shift – concept and preliminary theoretical analysis. Bulletin of the Polish Academy of Sciences: Technical Sciences, 68(3): 529–537, 2020. doi: 10.24425/bpasts.2020.133381.
[25] K.G. Sravani, D. Prathyusha, C. Gopichand, S.M. Maturi, A. Elsinawi, K. Guha, and K. S. Rao. Design, simulation and analysis of RF MEMS capacitive shunt switches with high isolation and low pull-in-voltage. Microsystem Technologies, 28:913–928, 2022. doi: 10.1007/s00542-020-05021-2.
[26] N. Lobontiu and E. Garcia. Mechanics of Microelectromechanical Systems. Kluwer Academic Publishers, 2005. doi: 10.1007/b100026.
[27] H.A. Rouabah, C.O. Gollasch, and M. Kraft. Design optimisation of an electrostatic MEMS actuator with low spring constant for an “Atom Chip”. In Technical Proceedings of the 2005 NSTI Nanotechnology Conference and Trade Show, volume 3, pages 489–492, 2002.
[28] R. Raymond and J. Raymond. Roark's Formulas for Stress and Strain. McGraw-Hill, 1989.
[29] M.S. Weinberg and A. Kourepenis. Error sources in in-plane silicon tuning-fork MEMS gyroscopes. Journal of Microelectromechanical Systems, 15(3):479–491, 2006. doi: 10.1109/jmems.2006.876779.

Go to article

Authors and Affiliations

Duong Van Nguyen

1 2

e-mail:

ORCID:

Chien Quoc Nguyen

e-mail:

ORCID:

Hieu Van Dang

e-mail:

ORCID:

Hoang Manh Chu

e-mail:

ORCID:

International Training Institute for Materials Science, Hanoi University of Science and Technology, Vietnam
FPT University, Hanoi, Vietnam

Search results

Filters

Search results

Less Commonly Used Membrane Desalination Technologies

Abstract

Authors and Affiliations

Design and performance analysis of a mechanically coupled spring compliant to out-of-plane oscillation

Abstract

Bibliography

Authors and Affiliations