For large-scale electric storage for the grid, a capacity in the order of 1 GWh or greater is desirable. Consider the possibility of creating a SMES system that is $0.5 \mathrm {~km}$ in diameter, consisting of a $2 \mathrm {~m}$ high coil with 20,000 turns of wire. What current is needed to store $1 \mathrm { GWh }$ of energy?

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The Answer of For large-scale electric storage for the grid, a capacity in the order of 1 GWh or greater is desirable. Consider the possibility of creating a SMES system that is $0.5 \mathrm {~km}$ in diameter, consisting of a $2 \mathrm {~m}$ high coil with 20,000 turns of wire. What current is needed to store $1 \mathrm { GWh }$ of energy?

For Large-Scale Electric Storage for the Grid, a Capacity in the Order