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Older reverse osmosis plants use about 5 kwh 1kwh 36 x 106

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Reference no: EM13584884

Older reverse osmosis plants use about 5 kWh (1kWh = 3.6 x 106 J) to make 1 m3 of freshwater from seawater.

1) find the amount of energy in quads (1.05 x 1018 J) to supply the entire annual freshwater withdrawn by North America from seawater by the reverse osmosis process.

2) Newer more efficient plants use less than 2 kWh to make a cubic meter of water. Find the energy needed to supple all of Asia's freshwater using this process.

3) Comment on your results. How do these amounts of energy compare to other energy needs?

Agricultutal use

(%)

Industrial use (%)

Domestic use (%)

Percentage withdrawn of renewable resource

Per capita withdrawn

(m3/person/yr)

Total freshwater withdrawal

(km3/ yr)

Renewable water resource

(km3/ yr)

Regions

76

8

15

14.9

797

2,294.84

15,436.2

Asia

23

36

40

8.2

260

622.48

7,620.8

North America

Reference no: EM13584884

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