Single-voltage-operation pseudomorphic HEMT with low current dissipation for portable power applications

1997 ◽  
Vol 33 (22) ◽  
pp. 1909 ◽  
Author(s):  
Jong-Lam Lee ◽  
Hyung Mo Yoo ◽  
Gi Young Lee
Keyword(s):  
Portable Power ◽  
Current Dissipation ◽  
Portable Power Applications

Fuel Cell Research and Development in Taiwan

2005 ◽  
Author(s):  
S. H. Chan ◽  
G. B. Jung ◽  
F. B. Weng ◽  
A. Su
Keyword(s):  
Fuel Cells ◽  
Fuel Cell ◽  
Strategic Alliance ◽  
Social Economic ◽  
Active Role ◽  
Portable Power ◽  
Efficient Alternative ◽  
Fuel Technology ◽  
Portable Power Applications

Fuel cells provide a clean and efficient alternative fuel technology for transportation, residential and portable power applications. From political, social, economic, energy, environmental and technological considerations, the emerging fuel cell technology is undoubtedly well worthy of long-term investment in Taiwan. In view of the success and manufacture capability of electronics and IT industries, Taiwan may play an active role in fuel cell manufacturing and is thus conducive for international strategic alliance, both in R&D and manufacturing activities. This article provides an overview of Taiwan’s technological activities and accomplishments in fuel cells, and makes recommendations for the country’s future development and commercialization of fuel cell applications.

Temperature and Concentration Simulations in the Methanol Steam Reformer

2008 ◽  
Author(s):  
Yen-Cho Chen ◽  
Rei-Yu Chein ◽  
Li-Chun Chen
Keyword(s):  
Steam Reforming ◽  
Heat Supply ◽  
Methanol Conversion ◽  
Methanol Steam Reforming ◽  
Gas Temperature ◽  
Steam Reformer ◽  
Portable Power ◽  
Supply Channel ◽  
Hydrogen Supply ◽  
Portable Power Applications

The methanol steam reforming plays an important role for hydrogen supply to the proton membrane exchange fuel cell in the portable power applications. The catalyst coating on the walls of channels is often used in the fabrication of the reactors in the reformer to minimize the pressure loss. In this study, the temperature and concentration fields in the reactors for the methanol steam reforming were investigated numerically. The methanol conversion is usually used to evaluate the performance of the reformer. The effects of the inlet gas temperature in the heat supply channel and inlet velocity in the reforming channel on the performance of the methanol steam reforming are presented.

Advanced Membrane Materials for Fuel Cell Applications

2010 ◽  
Vol 657 ◽  
pp. 88-115 ◽  
Author(s):  
S. M. Javaid Zaidi
Keyword(s):  
Fuel Cell ◽  
Temperature Stability ◽  
Polymer Electrolyte Membranes ◽  
Polymeric Membranes ◽  
Solid Polymer ◽  
Membrane Materials ◽  
Portable Power ◽  
Ionomer Membranes ◽  
Electrolyte Membranes ◽  
Portable Power Applications

Fuels are being considered an as environmental friendly technology and are making headlines across the globe as clean and reliable alternate energy source for transportation, stationary and portable power applications. The rapid developments taking place in all the leading research laboratories in the world are making fuel cell closer to the realization. The progress of PEM fuel cell is closely related to the development of solid polymer electrolyte membranes as it defines the properties needed for other components of the fuel cell. So far perfluorosulfonated membranes such as Nafion have been found useful in these fuel cells and are the only material of choice available commercially. But these membranes are very expensive and have other drawbacks, which acts as an impediment for the commercialization of this technology. As a result alternative cheaper membrane materials have been developed. For the development of new or novel membranes mainly three strategies have been used: (1) modifying the currently used ionomer membranes (2) synthesizing new polymeric membranes and (3) develop new polymer composites by blending the two polymers or composting with an inorganic material. The composite membrane approach (3) has been widely used to tackle the problem of methanol crossover and temperature stability.

scholarly journals Ammonia Borane Based Nanocomposites as Solid-State Hydrogen Stores for Portable Power Applications

2018 ◽  
Vol 6 (3) ◽  
pp. 583-594 ◽  
Author(s):  
Laura Bravo Diaz ◽  
James M. Hanlon ◽  
Marek Bielewski ◽  
Aleksandra Milewska ◽  
Duncan H. Gregory
Keyword(s):  
Solid State ◽  
Ammonia Borane ◽  
Portable Power ◽  
Portable Power Applications

The U.S. Department of Energy Efforts in Fuel Cells for Portable Power Applications

2019 ◽  
Vol 30 (1) ◽  
pp. 337-343 ◽  
Author(s):  
Donna Ho ◽  
John P. Kopasz ◽  
Thomas G. Benjamin ◽  
Walt Podolski
Keyword(s):  
Fuel Cells ◽  
Department Of Energy ◽  
Portable Power ◽  
Portable Power Applications ◽  
The U.S
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