Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 13 Jul 2017 My Price 8.00

portable electronic device

This problem has several parts:

(a) If a portable electronic device draws 1 A current at a voltage of 2.5 V, what is the power requirement for the device?

(b) You have designed a fuel cell that delivers 1 A at 0.5 V. How many of your fuel cells are required to

supply the above portable electronic device with its necessary voltage and current requirements?

(c) You would like the portable electronic device to have an operating lifetime of 100 h. Assuming 100% fuel utilization, what is the minimum amount of H2 fuel (in grams) required?

(d) If this H2 fuel is stored as a compressed gas at 500 atm, what volume would it occupy (assume ideal gas, room temperature)? If it is stored as a metal hydride at 5 wt % hydrogen, what volume would it occupy? (Assume the metal hydride has a density of 10 g/cm3.)

(e) If the fuel cell used methanol (CH3OH) fuel instead of H2, what would be the minimum amount (in grams) of methanol required for 100 h of life again assuming 100% fuel utilization? Methanol has a molecular mass of 32 g/mol. What would be the corresponding volume of liquid methanol fuel (the density of liquid methanol is 0.79 g/cm3)?

Answers

Maurice Tutor
(5)
Status NEW Posted 13 Jul 2017 07:07 PM My Price 8.00

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