Energy
Animation: How Wind Turbines Work
The windmill, which converts wind into rotational energy to mill grain or pump water, has been around since antiquity. It’s even been claimed that Ancient Babylonians planned to harness wind as early as almost 4,000 years ago, as part of a scheme for one of Hammurabi’s ambitious irrigation projects.
By the end of the 19th century, wind energy took on a whole new meaning as engineers in Scotland, Denmark, and the United States invented the first wind turbines that generated electricity. Many technological improvements have been made since, and now modern wind farms dot the landscapes of countries around the world.
Related Topic: What it Would Take to Power New York City
Today, wind power is an important element of the green energy mix, and its estimated that 432 GW of wind farms are installed globally. In the United States, nearly 5% of all power is now generated by wind.
How Wind Turbines Work
How do these massive propellers get into motion? Once they are turning, what do they do?
As shown in the animation, it’s all about the lift and drag forces created by the shape of the blades. Lift acts perpendicular to the direction of wind flow and drag acts parallel to the direction of wind flow.
The blades are designed so that when wind passes, a low-pressure pocket of air is created by faster moving wind on the curved side of the blade. This sucks the blade in the downwind direction, creating lift. The blades are then connected to a series of shafts that spin an electromagnetic induction generator, and this creates electricity.
There are some other bells and whistles that help to maximize efficiency in a modern wind turbine as well.
The anemometer measures wind speed, while the controller starts and stops the turbines to operate only at desirable wind speeds (between 8 and 55 kmph). The wind vane measures the wind’s direction and communicates this information to the yaw drive, which helps make adjustments to the turbine’s orientation. Lastly, there is also a braking system installed which can be used for emergency stops when wind speeds get too extreme.
Original graphic by: SaveOnEnergy
Energy
Ranked: Electric Vehicle Sales by Model in 2023
Today, electric vehicle sales make up 18% of global vehicle sales. Here are the leading models by sales as of August 2023.

Ranked: Electric Vehicle Sales by Model in 2023
Electric vehicle (EV) sales are gaining momentum, reaching 18% of global vehicle sales in 2023.
As new competitors bring more affordable options and new performance features, the market continues to mature as customers increasingly look to electric options.
This graphic ranks the top-selling EVs worldwide as of August 2023, based on data from CleanTechnica.
The Best Selling EVs in 2023 (Through August)
Below, we show the world’s best selling fully electric vehicles from January to August 2023:
Model | Country | Vehicles Sold (Jan-Aug 2023) |
---|---|---|
Tesla Model Y | 🇺🇸 U.S. | 772,364 |
Tesla Model 3 | 🇺🇸 U.S. | 364,403 |
BYD Atto 3 / Yuan Plus | 🇨🇳 China | 265,688 |
BYD Dolphin | 🇨🇳 China | 222,825 |
GAC Aion S | 🇨🇳 China | 160,693 |
Wuling HongGuang Mini EV | 🇨🇳 China | 153,399 |
GAC Aion Y | 🇨🇳 China | 136,619 |
VW ID.4 | 🇩🇪 Germany | 120,154 |
BYD Seagull | 🇨🇳 China | 95,202 |
As we can see, Tesla‘s Model Y still holds a comfortable lead over the competition with 772,364 units sold. That’s more than double the sales of the #2 top selling vehicle, Tesla’s Model 3 (364,403)
But it’s hard to ignore the rising prevalence of Chinese EVs. The next five best selling EV vehicles are Chinese, including three from BYD. The automaker’s Atto 3 (or Yuan Plus, depending on market), is being sold in various countries including Germany, the UK, Japan, and India.
Meanwhile, Chinese automaker GAC Group also had two models of its Aion EV brand make the rankings, with the Aion S selling 160,693 units so far.
Regional market strength is also clear. For Volkswagen’s ID.4 model (120,154 units sold), Europe and China account for the majority of sales.
Given growing cost efficiencies and changing consumer behavior, global EV sales are projected to make up half of new car sales globally by 2035, according to forecasts from Goldman Sachs.
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