A novel ribbed cathode polar plate design in piezoelectric proton exchange membrane fuel cells

Ma, Hwong‐Wen; Huang, Shih‐Han; Kuo, Yi-Ching

doi:10.1016/j.jpowsour.2008.07.019

Cited by 30 publications

(17 citation statements)

References 24 publications

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“…The inflow and outflow periods in the chamber were determined by the sine function. Thus, using Reynolds transport theorem and the continuity equation , , the airflow rate can be written as Eq. :

Q_{c} = 1 / R \frac{\partial}{\partial t} \int_{C \forall} \frac{P}{T} d \forall + ρ {\overset{V}{true}}_{P Z T} A_{P Z T}

…”

Section: Working Principle Of the Pzt‐pemfcmentioning

confidence: 99%

“…The PZT‐PEMFC is a natural intake type (air‐breathing) PEMFC with a piezoelectric micro‐pump with a nozzle and diffuser replacing the traditionally aspirated fan or air pump. Ma et al , developed a novel cathode channel design that utilized the piezoelectric effect in air‐breathing‐PEMFC systems, known as the PZT‐PEMFC. The PZT‐PEMFC can feed air into the cathode channel through a gas pump with a piezoelectric device structure.…”

Section: Introductionmentioning

confidence: 99%

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Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

Hsu

Luo

2017

Fuel Cells

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Previous studies demonstrated a piezoelectric proton exchange membrane fuel cell (PZT‐PEMFC) stack design composed of three bi‐cells in series and a single bi‐cell, with a maximum net power density of 0.1608 W cm−2. The present study developed a modified bi‐cell design with lower volume and weight by using gold‐plated aluminum 6061. A groove‐designed PZT actuator enclosed with poly‐di‐methyl‐siloxane (PDMS) curing for 30 min can reduce uneven air feeding. Such an actuator can also improve the performance of both sides of a bi‐cell, with only a 0.7% difference in the open circuit voltage (OCV). The experimental results showed that the net power density of the new version of the single bi‐cell PZT‐PEMFC module was 0.1658 W cm−2.

show abstract

Q_{c} = 1 / R \frac{\partial}{\partial t} \int_{C \forall} \frac{P}{T} d \forall + ρ {\overset{V}{true}}_{P Z T} A_{P Z T}

…”

Section: Working Principle Of the Pzt‐pemfcmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

Hsu

Luo

2017

Fuel Cells

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show abstract

“…Zhang and Wang [19] proposed a valveless micro pump for fuel delivery in DMFC devices and suggested that the large driving frequency may decrease the power consumption of the micropump. Previous studies showed that the air-breathing piezoelectric proton exchange membrane fuel cell (PZT-PEMFCs) can feed air into the cathode channel through a gas pump with a piezoelectric actuation structure [20][21][22][23][24]. This design could solve the water flooding problem and increase cell efficiency.…”

Section: Introductionmentioning

confidence: 99%

Study of a Fuel Supply Pump with a Piezoelectric Effect for Microdirect Alcohol Fuel Cells

Wang

Cheng

et al. 2011

International Journal of Electrochemistry

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A novel design for an ethanol injection system has been proposed, which consists of one pump chamber, two valves, and one central-vibrating piezoelectric device. The system uses a microdiaphragm pump with a piezoelectric device for microdirect alcohol fuel cells. The diameters of the pump chamber are 31 mm and 23 mm, and the depths of the chamber are 1 mm and 2 mm. When the piezoelectric device actuates for changing pump chamber volume, the valves will be opened/closed, and the ethanol will be delivered into DAFC system due to the pressure variation. The chamber dimensions, vibrating frequencies of the piezoelectric device, and valve thickness are used as important parameters for the performance of the novel ethanol injection system. The experimental results show that the ethanol flow rate can reach 170 mL/min at a vibrating frequency of 75 Hz. In addition, the ethanol flow rate is higher than the water flow rate.

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“…Concerning the energy conservation and acoustic problems, piezoelectric actuators, such as the disk type, the cantilever type, and the stack type, are commercialized and widely applied in microfluid, micropump, fuel cells and microelectro-mechanical systems (MEMS) [1][2][3][4][5]. The piezoelectric fan [6][7][8][9][10][11][12], shown in Figure 1(b), generates forced convection by blade swinging.…”

Section: Introductionmentioning

confidence: 99%

Study of an LED device with vibrating piezoelectric fins

Chen

Lan

et al. 2009

2009 25th Annual IEEE Semiconductor Thermal Measurement and Management Symposium

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This study examines an innovative design of a proposed vibrating fin for thermal management of an LED device. The vibrating fin, coated with thin copper and composed of piezoelectric material, can vibrate and conduct heat from the finned base using the piezoelectric effect. This innovative heat-dissipation device can easily break the thermal boundary layer to enhance heat-transfer rate by changing the convective heat-transfer coefficient. In this study, three-dimensional transitional models for the vibrating fins are successfully built to investigate the major heat dissipation phenomena. Simulated results show that the performance of the vibrating fins is strongly affected by dimensions, vibrating frequency, pitch, and amplitude of fins. In addition, the thermal performance of fins can be further increased by the proper phase difference between the fins and the direction of gravity. The phase angles of the vibrations affect not only the flow field, but also the temperature distribution around the fins.

show abstract

A novel ribbed cathode polar plate design in piezoelectric proton exchange membrane fuel cells

Cited by 30 publications

References 24 publications

Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

Development of a Bi‐cell Proton Exchange Membrane Fuel Cell with Optimized Groove‐designed Piezoelectric Actuator

Study of a Fuel Supply Pump with a Piezoelectric Effect for Microdirect Alcohol Fuel Cells

Study of an LED device with vibrating piezoelectric fins

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