Diaphragm air–liquid micro pump applicable to the direct methanol fuel cell

Lee, Shi‐Min; Kuan, Yean‐Der; Sung, Min-Feng

doi:10.1016/j.jpowsour.2013.03.098

Cited by 13 publications

(4 citation statements)

References 10 publications

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“…An AC (Alternating Current) liquid pump and DC (Direct Current) air pump were used to constantly supply methanol fluid and air. However, to fabricate a portable module, a diaphragm air-liquid micropump [16], which supplies both liquid and air without requiring a substantial amount of power, can be installed. The polarization curves of the current collectors using different thermal evaporation conditions were measured.…”

Section: Performance Measurements Of the Three-cell Disc-type Dmfc Momentioning

confidence: 99%

Development of a Direct Methanol Fuel Cell with Lightweight Disc Type Current Collectors

2014

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Abstract:The direct methanol fuel cell (DMFC) adopts methanol solution as a fuel suitable for low power portable applications. A miniature, lightweight, passive air-breathing design is therefore desired. This paper presents a novel planar disc-type DMFC with multiple cells containing a novel developed lightweight current collector at both the anode and cathode sides. The present lightweight current collector adopts FR4 Glass/Epoxy as the substrate with the current collecting areas located at the corresponding membrane electrolyte assembly (MEA) areas. The current collecting areas are fabricated by sequentially coating a corrosion resistant layer and electrical conduction layer via the thermal evaporation technique. The anode current collector has carved flow channels for fuel transport and production. The cathode current collector has drilled holes for passive air breathing. In order to ensure feasibility in the present concept a 3-cell prototype DMFC module with lightweight disc type current collectors is designed and constructed. Experiments were conducted to measure the cell performance. The results show that the highest cell power output is 54.88 mW·cmand successfully demonstrate the feasibility of this novel design. OPEN ACCESSEnergies 2014, 7 3137

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Section: Performance Measurements Of the Three-cell Disc-type Dmfc Momentioning

confidence: 99%

Development of a Direct Methanol Fuel Cell with Lightweight Disc Type Current Collectors

2014

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“…Piezoelectric pumps have been widely studied in recent years due to their attractive advantages of compact structure, good reliability, low power consumption, high efficiency, precise control ability, fast response, and no electromagnetic influence [1,2]. They have shown extensive application prospects in biomedical treatment, fuel delivery systems, micro-electronic devices, and robots [1,[3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Improving Output Performance of a Resonant Piezoelectric Pump by Adding Proof Masses to a U-Shaped Piezoelectric Resonator

et al. 2021

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This study proposes the improvement of the output performance of a resonant piezoelectric pump by adding proof masses to the free ends of the prongs of a U-shaped piezoelectric resonator. Simulation analyses show that the out-of-phase resonant frequency of the developed resonator can be tuned more efficiently within a more compact structure to the optimal operating frequency of the check valves by adjusting the thickness of the proof masses, which ensures that both the resonator and the check valves can operate at the best condition in a piezoelectric pump. A separable prototype piezoelectric pump composed of the proposed resonator and two diaphragm pumps was designed and fabricated with outline dimensions of 30 mm × 37 mm × 54 mm. Experimental results demonstrate remarkable improvements in the output performance and working efficiency of the piezoelectric pump. With the working fluid of liquid water and under a sinusoidal driving voltage of 298.5 Vpp, the miniature pump can achieve the maximum flow rate of 2258.9 mL/min with the highest volume efficiency of 77.1% and power consumption of 2.12 W under zero backpressure at 311/312 Hz, and the highest backpressure of 157.3 kPa under zero flow rate at 383 Hz.

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“…The diaphragm pump has the check valve and feeds the solution by moving the diaphragm installed on the pump chamber up and down using a piezoelectric actuator or a solenoid coil. (16,17) Although this pump is small and can provide a large output, it generates pulsations. The syringe pump is composed of an outer cylinder and an inner cylinder and feeds solution by gradually pushing the solution into the inner cylinder.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetically Driven Micropump with Magnetic-fluid-sealed Thrust Bearing Contributing to Miniaturization of Medical Analytical Sensor Systems

Kato¹,

Oshida²,

Sato³

et al. 2019

Sensors and Materials

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In this study, we developed an electromagnetically driven micropump with a magnetic fluid seal, which greatly contributes to the miniaturization of medical analytical sensor systems. The magnetic fluid seal applied to this micropump prevented the solution from entering the inside of the thrust bearing attached to the gap between the liquid feed rotor and the stator, and the abrasion powder generated from the bearing was prevented from being mixed into the solution. Furthermore, because the liquid feed rotor was rotated in a noncontact manner by the electromagnetic force from the coil attached to the external pump, continuous feeding of liquid with reduced pulsation was possible. When the rotational speed of the liquid feed rotor was 500 rotations per minute, the feed rate of pure water was 2 ml/min. At this rotational speed, there was no pure water intrusion into the thrust bearing nor separation of the magnetic fluid from the neodymium magnet. This result indicates that the magnetic fluid seal for the thrust bearing is effective. The micropump developed is a device that can be integrated with a biosensor chip, thereby contributing to the realization of a compact medical analysis sensor system that can be easily operated beside a patient.

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Diaphragm air–liquid micro pump applicable to the direct methanol fuel cell

Cited by 13 publications

References 10 publications

Development of a Direct Methanol Fuel Cell with Lightweight Disc Type Current Collectors

Development of a Direct Methanol Fuel Cell with Lightweight Disc Type Current Collectors

Improving Output Performance of a Resonant Piezoelectric Pump by Adding Proof Masses to a U-Shaped Piezoelectric Resonator

Electromagnetically Driven Micropump with Magnetic-fluid-sealed Thrust Bearing Contributing to Miniaturization of Medical Analytical Sensor Systems

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