A certain renewable source of energy produces 50,000 kWduring June. We would like to use it to

Question:

A certain renewable source of energy produces 50,000 kWduring June. We would like to use it to produce hydrogen. Hydrogen has to be compressed up to 30 bar and the oxygen is sold at 100 bar. Assuming perfect water splitting, pure hydrogen and oxygen streams from cathode and anode, respectively, a polytropic (k51.4) efficiency of 85% for the compressors, and the fact that the electrolysis takes place at 80C and consumes 175.000 kJ/kgH2:

a. Compute the flow rate of hydrogen produced.

b. Select the technology.

c. Determine the cost of wind energy so that it becomes competitive, assuming a carbon tax of 40h/t of CO2 and the fact that the ground required costs 25h/m2 (Table P4.11).

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