High efficiency fuel cell based uninterruptible power supply for digital equipment

James Gonzales, Govindasamy Tamizhmani

    Research output: Contribution to journalArticle

    16 Citations (Scopus)

    Abstract

    Eliminating the ac-dc converter (such as a computer's power supply), in a dc system when using a fuel cell based uninterruptible power supply (UPS), serves several primary functions. Firstly, it eliminates the need for a dc-ac inverter, and secondly, it eliminates a usually highly inefficient component - the power supply. Multiple conversions result in multiple inefficiencies. By replacing the computer's ac power supply with a high efficiency dc power supply capable of operating directly from a fuel cell - and thereby eliminating the inverter - the overall efficiency of the UPS can be increased by 50% or more. This is essential considering that the primary function of a fuel cell based UPS is long-term operation of the system, and poor efficiency equates to higher fuel consumption. Furthermore, inefficient systems have greater power demands, and therefore a larger fuel cell stack is needed to power them. At the present cost of fuel cell systems, this is a considerable problem. The easiest way to accomplish a direct dc UPS is to replace the computer's ac-dc power supply with a dc-dc power supply.

    Original languageEnglish (US)
    Pages (from-to)151-156
    Number of pages6
    JournalJournal of Power Sources
    Volume153
    Issue number1
    DOIs
    StatePublished - Jan 23 2006

    Fingerprint

    Uninterruptible power systems
    power supplies
    fuel cells
    Fuel cells
    Fuel consumption
    fuel consumption
    converters
    Costs
    costs

    Keywords

    • Cell
    • Computer
    • Fuel
    • Power
    • Supply
    • Uninterruptible

    ASJC Scopus subject areas

    • Electrochemistry
    • Fuel Technology
    • Materials Chemistry
    • Energy (miscellaneous)

    Cite this

    High efficiency fuel cell based uninterruptible power supply for digital equipment. / Gonzales, James; Tamizhmani, Govindasamy.

    In: Journal of Power Sources, Vol. 153, No. 1, 23.01.2006, p. 151-156.

    Research output: Contribution to journalArticle

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