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Alternative energy

Which of the following technologies might best even out daily demand peaks for electricity due to cooling demand?
A. Small-scale hydro power
B. Biogas
C. Ice Storage
D. Fuel Cells
E. Wind Turbines
F. Geothermal
AnswerC. Ice Storage - by chilling a tank of ice ball storage at times of lower energy rates (at night) the stored temperature can be released during the day (highest cooling demand) reducing energy cost and flattening peak demand.

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