Terminology

What is the difference between power and energy?

Speed & Distance

Speed(KM/Hr)

Hours(Hr)

Distance(KM)

12 KM/Hr 1 12 KM12 KM/Hr 2 24 KM

Power & Energy

Power(MW)

Hours(Hr)

Energy(MWh)

200MW 1 200MWh200MW 2 400MWh

Speed & Distance

KM/hr Hr KM

Power & Energy

MWh/Hr Hr MWh

=MW

Terminology

Shively, p32.

•Very Low

•Nuclear •Coal •Gas •Oil •Shortage

•Exceptionally high

•Very high•Moderate•Low

•0

•20

•30

•50

•Load curve

•00

•05

•07

•10

•13

•15

•18

•24

•Very Low

•Low

•Moderate

•Very high

•Exceptionally high

•Hours

•4

•P

•Nuclear •Coal •Gas •Oil •Shortage

•Exceptionally high

•Very high•Moderate•Low

•Load curve

•00

•05

•07

•10

•13

•15

•18

•24

•Very Low

•Low

•Moderate

•Very high

•Exceptionally high

•Very Low

•P

•0

•20

•30

•50

•P=0

•P=20

•P=30

•P=50 •P=CAP

•Hours

•5

Speed & Distance

Speed(KM/Hr)

Hours(Hr)

Distance(KM)

12 KM/Hr 1 12 KM12 KM/Hr 2 24 KM

Power & Energy

Power(MW)

Hours(Hr)

Energy(MWh)

200MW 1 200MWh200MW 2 400MWh

Speed & Distance

KM/hr Hr KM

Power & Energy

MWh/Hr Hr MWh

=MW

Terminology

0

100,000

200,000

300,000

400,000

500,000

600,000

700,000G

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Rom

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Gre

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Por

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Annual consumption in 2011 in GWh

•5 €cent/KWh= 0.05€/ KWh= 50€/ MWh

• I have a nuclear with a capacity of 500MW (power).• How much energy can this power plant produce in

a year?

• How many hours are in a year?• 24*365= 8760

– (Q&D, +/- 10.000 minus 12%)

– ≈500MW * 10.000 hours– ≈ 5.000.000MWh– ≈ 5.000GWh– ≈ 5 TWh– =4.4 TWh

• In the EU in 2012 there was a capacity of 120GW (power) in solar. This produced 100TWh in 2012.

• What is approximately the capacity factor of EU solar?

• How many hours are in a year?– 10.000 minus 12%

• If it ran at full capacity (100% c.p.) it would have produced about 120 * 10.000GW– ≈1.200.000 GW– ≈1.200 TW– ≈1.000 TW (minus the 12%)

• But it produced 10 times less…• Thus c.p. is ≈ 10%