Thermoelectric materials hold great promise for future clean energy production.
ID: 1998072 • Letter: T
Question
Thermoelectric materials hold great promise for future clean energy production. Operating between high and low temperature reservoirs, they convert the natural heat flow into useful electricity.
A cruise ship line is planning to install thermoelectric generators on all their ships to make them more energy efficient. They will operated between the high temperature of the internal combustion engines (400oC) and the cool ocean water (15oC).
If these thermoelectric generators absorb 120,000 Joules of heat each second (120 kiloWatts), how much electrical energy will they produce when operating at ideal efficiencies?
69 kiloWatts
52 kiloWatts
116 kiloWatts
210 kiloWatts
none of these since it is impossible to convert heat into electricity
69 kiloWatts
52 kiloWatts
116 kiloWatts
210 kiloWatts
none of these since it is impossible to convert heat into electricity
Explanation / Answer
Efficiency= 1-T(cold)/T(hot)=1-288/673=.572
Electricity production = .572x120 kilowatts = 68.62 KWatts
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