Micro-Fuel Cells

Hebling, Christopher; Rochlitz, L.; Aicher, T.

doi:10.1016/b978-044452190-3.00051-3

Cited by 4 publications

(2 citation statements)

References 53 publications

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“…FCs have the advantage of high energy density (similar to that of LI batteries), can be carbon-neutral (by-product of cell is water and heat [64]) [69], its capacity does not deplete during "discharge" (it supplies a constant capacity throughout) and "recharging" is as quick as a refuel (around 3 min) [70]. Most FCs use some or other form of hydrogen as fuel as hydrogen is abundant, but its acquisition requires either electrolysis or reformation [63]herein lies the method of storing renewable energy, i.e., generate and store hydrogen.…”

Section: Battery Technologymentioning

confidence: 99%

A Comparative Review of Lead-Acid, Lithium-Ion and Ultra-Capacitor Technologies and Their Degradation Mechanisms

Townsend

Gouws

2022

Energies

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As renewable energy sources, such as solar systems, are becoming more popular, the focus is moving into more effective utilization of these energy sources and harvesting more energy for intermittency reduction in this renewable source. This is opening up a market for methods of energy storage and increasing interest in batteries, as they are, as it stands, the foremost energy storage device available to suit a wide range of requirements. This interest has brought to light the downfalls of batteries and resultantly made room for the investigation of ultra-capacitors as a solution to these downfalls. One of these downfalls is related to the decrease in capacity, and temperamentality thereof, of a battery when not used precisely as stated by the supplier. The usable capacity is reliant on the complete discharge/charge cycles the battery can undergo before a 20% degradation in its specified capacity is observed. This article aims to investigate what causes this degradation, what aggravates it and how the degradation affects the usage of the battery. This investigation will lead to the identification of a gap in which this degradation can be decreased, prolonging the usage and increasing the feasibility of the energy storage devices.

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Section: Battery Technologymentioning

confidence: 99%

A Comparative Review of Lead-Acid, Lithium-Ion and Ultra-Capacitor Technologies and Their Degradation Mechanisms

Townsend

Gouws

2022

Energies

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“…The demand for micro-power sources with light-weight and long-life is increasing with the miniaturization of electromechanical devices. It results in two kinds of power sources: micro fuel cell system [1] and combustion-based micro-power generators [2]. Micro heat engine [3] was proposed in 1997.…”

Section: Introductionmentioning

confidence: 99%

Micro combustion in sub-millimeter channels for novel modular thermophotovoltaic power generators

Pan

Yang

Tang

et al. 2010

J. Micromech. Microeng.

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The performance of micro combustion-driven power systems is strongly influenced by the combustor structure. A novel modular thermophotovoltaic (TPV) power generator is presented, which is based on the sub-millimeter parallel plate combustor. It has the potential to achieve a high power density because of the high radiation energy per unit volume due to the high surface-to-volume ratio of the micro-combustor. The work experimentally investigated the ignition limitation for two micro-combustors. It also studied the effects of three major parameters on a sub-millimeter combustor, namely hydrogen to oxygen mixing ratio, hydrogen volumetric flow rate and nozzle geometry. The results show that the combustion efficiency decreases with the increase of the hydrogen flow rate, which is caused by reduced residence time. The average wall temperature with the rectangular nozzle is 25 K higher than that with the circle nozzle. The output electrical power and power density of the modular TPV power generator are projected to be 0.175 W and 0.0722 W cm −3 respectively. We experimentally achieve 0.166 W of electrical power, which is in good agreement with the model prediction.

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Design and working performance study of a novel micro parallel plate combustor with two nozzles for micro thermophotovotaic system

et al. 2015

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Micro-combustors are a key component in combustion-driven micro power generators, and their performance is significantly affected by their structure. For the application of micro-thermophotovoltaic (MTPV) system, a high and uniform temperature distribution along the walls of the micro combustor is desired. In this paper, a three-dimensional numerical simulation has been conducted on a new-designed parallel plate micro combustor with two nozzles. The flow field and the combustion process in the micro combustor, and the temperature distribution on the wall as well as the combustion efficiency were obtained. The effects of various parameters such as the inlet angle and the fuel volumetric flow rate on the performance of the micro combustor were studied. It was observed that a swirl formed in the center of the combustor and the radius of the swirl increased with the increase of the inlet rate, and the best working condition was achieved at the inlet angle ?=20?. The results indicated that the two-nozzle combustion chamber had a higher and more uniform mean temperature than the conventional combustor under the same condition.

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Micro-Fuel Cells

Cited by 4 publications

References 53 publications

A Comparative Review of Lead-Acid, Lithium-Ion and Ultra-Capacitor Technologies and Their Degradation Mechanisms

A Comparative Review of Lead-Acid, Lithium-Ion and Ultra-Capacitor Technologies and Their Degradation Mechanisms

Micro combustion in sub-millimeter channels for novel modular thermophotovoltaic power generators

Design and working performance study of a novel micro parallel plate combustor with two nozzles for micro thermophotovotaic system

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