A Country with strong Wind power–Denmark

Grade level: 4th – 5th grades

Skills: multiplication and division

Related environmental issues: Energy 

Denmark is blessed with an abundance of wind and became a pioneer and a leader in wind power technology in the world.  It was reported that 43.6% of electricity was generated by wind power in Denmark in 2017.   The wind turbines in Denmark generated as much as 14,700 GWh (giga-watt-hour) of electricity in a year.

V90-3MW_Robin_Rigg.jpg

Photo) Offshore wind farm in Denmark

 

  1. How much wind power in GWh did Denmark generate in one month during 2017?
  2. How much wind power in GWh did Denmark generate in one day during 2017? (Use 1 month = 30 days) Round to the nearest one.
  3. With 1 GWh of electricity,  about 33,400 households* in the United States can use electricity for a day.  There are about 1,360,000 households in Connecticut.  Is the wind power in Denmerk big enough to supply electricity to the entire household in Connecticut or not? Explain.

 

Sources: 1) Renewables Now 2) Statista, Number of households in the United States in 2016, by state (in millions)

Photo: The official website of Denmark

* According to U.S. EIA, the average annual electricity consumption for a U.S. residential utility customer was 897 kWh per month in 2016 (EIA, 2017)

 

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Answer keys

1. 14,700 ÷ 12 = 1,225 (GWh)

2. 1,225 ÷ 4 = 40.83… ⇨41 (GWh)

3. Yes. 33,4000 x 41 = 1,369,400

1,369,400 > 1,360,000

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