Consider the Possibility of Extracting Energy from 1 M3 of Water

question 20

Essay

Consider the possibility of extracting energy from 1 m3 of water. One
approach would be lift the water to some elevation and then to generate electricity hydroelectrically (i.e., pumped hydroelectric storage). The second approach would be to produce hydrogen from the water by electrolysis and then generate electricity from the hydrogen in a proton exchange membrane fuel cell. Using typical efficiencies as given in Chapters 18 and 20, how high would the cubic meter of water have to be lifted to provide the same total electrical energy output as the fuel cell?

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Definitions:

Estimated Salvage

The projected value of an asset at the end of its useful life.

Simple Rate of Return

A method to calculate the return on investment by dividing the annual incremental net operating income by the initial investment's cost.

Discount Rate

The discount rate that adjusts future cash flows to their current worth, accounting for the time value of money.

Investment Required

The total amount of capital needed to start or expand a business or project, encompassing all necessary expenses.