14. The worldwide installed wind power in 2012 was 102 GW. Assume that the total electricity generation worldwide is 20200 TWh per year, and a capacity factor 307 for wind power of. What percentage of the total electricity generation worldwide was covered by wind energy in 2012? 15. What are the different aspects that intervene in the cost of a wind turbines installations?

14. To calculate the percentage of total electricity generation worldwide covered by wind energy in 2012, we need to first understand the capacity factor. The capacity factor is the ratio of the actual output of a power plant over a period of time and its output if it had operated at full capacity the entire time.

Here are the steps:

• First, calculate the annual energy production from wind power. The capacity factor is given as 307, but capacity factors are usually expressed as a decimal or a percentage, not a whole number. Assuming the capacity factor is 0.307 (or 30.7%), the annual energy production from wind power is 102 GW * 0.307 * 24 hours/day * 365 days/year = 276.5 TWh/year.

• Next, calculate the percentage of total electricity generation worldwide covered by wind energy. The total electricity generation worldwide is given as 20200 TWh/year. So, the percentage is (276.5 TWh/year / 20200 TWh/year) * 100% = 1.37%.

15. The cost of wind turbine installations can be influenced by several factors:

• The cost of the wind turbine itself, which includes the tower, rotor, generator, and other components.
• The cost of site preparation and installation, which can vary depending on the location and the size of the wind farm.
• The cost of connecting the wind farm to the power grid.
• Ongoing operation and maintenance costs.
• Financing costs, which can vary depending on the financial arrangements used to fund the project.
• Policy and regulatory factors, which can affect the cost and availability of financing, as well as the revenue from selling the electricity generated by the wind farm.