Please use this identifier to cite or link to this item: https://rda.sliit.lk/handle/123456789/2278
Title: Performance of piezoelectric actuators in a hydrogen environment: Experimental study and finite element modelling
Authors: Singh, Y
Rajapakse, R. K. N. D
Kjeang, E
Mumford, D
Keywords: Piezoelectricity
Hydrogen
Fuel injector
Actuator stroke
Diffusion in solids
Finite element analysis
Issue Date: 2-Mar-2015
Publisher: Pergamon
Series/Report no.: International Journal of Hydrogen Energy;Vol 40 Issue 8 Pages 3370-3380
Abstract: Significant improvements in fuel efficiency and emissions can be achieved in internal combustion engines (ICE) by electronically controlling the fuel injector opening valves with piezoelectric actuators. Hydrogen is considered an attractive alternative fuel with near-zero emissions at the point of use; however, the current understanding of the performance of piezoelectric actuators in a hydrogen environment is very limited. Variation in the performance of piezoelectric actuators due to their continuous and cyclic exposure to hydrogen at 100 °C and 10 MPa is experimentally investigated in the present work. The actuator's stroke-voltage relationship is evaluated under quasi-static as well as dynamic electric loading conditions within the ambient temperature range of 5–80 °C. A 3-D finite element model is also developed to simulate the behaviour of a single stack of an actuator exposed to hydrogen by using experimentally determined piezoelectric coefficients. The importance of coating technology to protect the actuator material from hydrogen is confirmed by the experimental study and numerical modelling.
URI: http://rda.sliit.lk/handle/123456789/2278
Appears in Collections:Research Papers - SLIIT Staff Publications

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