Optimization of a circular piezoelectric bimorph for a micropump driver

Morris, Christopher J.; Forster, Fred K.

doi:10.1088/0960-1317/10/3/323

Cited by 116 publications

(64 citation statements)

References 12 publications

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“…A linearized dynamic system model was established to help improve the original design and dramatic improvements were obtained [34]. They also utilized the finite element method to find the optimal geometric and material parameters for the circular piezoelectric micropump actuator [35].…”

Section: O Mhmentioning

confidence: 99%

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06/00145 Valveless piezoelectric micropump for fueldelivery in direct methanol fuel cell (DMFC) devices

2006

Fuel and Energy Abstracts

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Presented in this dissertation is the study of a novel fuel delivery system combined with miniaturized direct methanol fuel cell (DMFC). The core component of this system is a valveless micropump driven by ring-type piezoelectric bending actuator. By applying an alternating electrical field across the actuator, the resultant reciprocating movement of the pump diaphragm can be converted into pumping effect. Nozzle/diffuser elements are used to direct the flow. To make the power system applicable for portable electronic devices, the micropump needs to meet some specific requirements: low power consumption but sufficient fuel flow rate. In this study, both theoretical and experimental methods have been used to investigate the effects of materials properties, actuator dimensions, driving voltage, driving frequency, nozzle/diffuser dimension, and other factors on the performance of the whole system. As a result, a viable design of micropump system for fuel delivery in DMFC devices has been achieved and some further improvements are suggested.In the beginning of this dissertation, the history, working principle, types, and current research status of both fuel cell and micropump are reviewed. Following this comprehensive introduction, the research objective to develop a novel portable power system that combines fuel cell technology and micropump technology is presented. To help design such a system, a series of analytical models are established to estimate the deflection, volume change, flow rate, and power iv consumption of the micropump. Both finite element method (FEM) and experimental method are applied to verify the models. Based on the analytical analysis, material properties and dimensions of the micropump actuator are optimized to obtain maximum flow rate and minimum power consumption. Later a separated micropump prototype has been fabricated and tested. It is observed that the performance of a DMFC device is improved by using this micropump to supply fuel. In addition, the electrochemical impedance analysis of this fuel cell device is conducted to try to understand the reasons for the performance improvement. Finally, the accomplishments of this study are summarized and future perspective is provided.v

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Section: O Mhmentioning

confidence: 99%

“…The experimental data can be found available in [35]. The same dimensions and material properties listed in Table 4 are used for all the calculations here.…”

Section: Verification By Numerical Simulation and Experimental Measurmentioning

confidence: 99%

06/00145 Valveless piezoelectric micropump for fueldelivery in direct methanol fuel cell (DMFC) devices

2006

Fuel and Energy Abstracts

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“…Such HSJA layouts are similar to those of valve-less pumps. They consist of a fluidic diode, an exit nozzle, and a displacement chamber with a moving piston or diaphragm [15][16][17][18][19][20]. Unlike the valveless pump, the jet flow from the nozzle of the HSJA issues into the ambient space where the HSJ is generated.…”

Section: Introductionmentioning

confidence: 99%

A new method for fluid input into a hybrid synthetic jet actuator

Kordík

Trávníček

Tesař

2014

EPJ Web of Conferences

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Abstract.A new principle of flow rectification for hybrid synthetic jet actuators is introduced in this paper.As is well known, the flow rectification can be best accomplished by means of fluidic diodes. Novelty of the present study are fluidic diodes with two mutually opposed nozzles. Interaction between the periodic jet flows from the nozzles causes a difference between the blowing and suction strokes, resulting in a particularly efficient rectification effect. The distance between the nozzle exits as well as the oscillation frequency were the parameters, which were varied during hot-wire measurements. The combination of those parameters achieving the highest volumetric efficiency was identified.

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“…The procedure for designing ultrasonic probe element for piezoceramic transducer for the measurement of electrical impedance and loss has been studied in detail by Fattah [21]. The Finite-element method to optimize the deflection of a single piezoelectric circular bimorph actuator was studied by Morris [22].…”

Section: Introductionmentioning

confidence: 99%

Design and Modeling of MEMS Based Nano Displacement PZT Sensing Element

Manoharan¹,

Nedumaran²

2012

IJCA

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Piezoelectric principles are widely used to harvest energy in the process of vibrating piezoelectric mass. Different design configurations were studied in the research papers listed. A novel dynamic method of Lead Zirconate Titanate Sensor (PZT) to obtain d 33 suitable for the MEMS applications is designed, simulated and analysed results were compared with the fabricated sensor. The Lead Zirconate Titanate Square Plate (PZTSP) fixed at the bottom, which is acted upon by the application of pressure to validate direct piezoelectric effect. This model develops piezoelectric voltage in dynamic mode by suitably opening and closing the pressure inlet optimized time constant for one second. A prototype model is validated, which can be used for the pressure sensing and indicating applications. General TermsMicroelectromechanical Systems

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Optimization of a circular piezoelectric bimorph for a micropump driver

Cited by 116 publications

References 12 publications

06/00145 Valveless piezoelectric micropump for fueldelivery in direct methanol fuel cell (DMFC) devices

06/00145 Valveless piezoelectric micropump for fueldelivery in direct methanol fuel cell (DMFC) devices

A new method for fluid input into a hybrid synthetic jet actuator

Design and Modeling of MEMS Based Nano Displacement PZT Sensing Element

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