Little known things about wind energy

Wind is abundant, green and clean energy for the environment. For centuries, people have known how to take advantage of the wind to produce and generate electricity.

However, there are some interesting things that we may not know about this type of energy.

1. Wind is one of the oldest forms of energy

From 5,000 BC, the effects of wind have been known in sailing. Sailors were the first to find an easier way to navigate the sea, laying the groundwork for human understanding of important concepts like dynamics and lift. Starting with the winged mill, these principles became the key to the next innovation, opening the revolution to automating time-consuming activities in agriculture.

Practical applications of wind were also found in the ninth century in Iran (as described by Abu Ishaq al-Istakhri). It is also a large form of pinwheels with propellers with a cloth-covered structure and a transmission system with ropes, pulleys used to move large stones in construction or to transfer water from lower to higher. Rough engines in pinwheel formations in India and Iran have vertical rotating shafts, and horizontal rotating discs.

2. MW of wind energy reduces 2,600 tons of CO2

According to information from the US Renewable Energy Laboratory (NREL), wind power is of interest because 1MW of wind power produced will help reduce about 2,600 tons of CO2 emissions into the environment. The fact that the less fossil fuel is consumed, the less CO2 it emits and the lower its CO2 emissions, which is now the standard for monitoring the progress of adopting alternative forms of energy.

A typical example is in Massachusetts (USA), in 2004, on average each citizen of this state emitted 4.5 tons of CO2 from using electricity. Meanwhile, only 1 MW of wind power can supply about 400 houses without emitting any CO2. Besides reducing CO2 emissions, wind power also brings more benefits than hydroelectricity, 1MW of wind power will save about 1,293 million liters of water.

3. Actual wind energy is solar

The source of this endless green energy is from the sun. Sunlight warms our planet, but because the Earth is constantly moving, the surface of the Earth is not even, making the temperature different from place to place.

The difference in temperature causes abnormalities in atmospheric pressure; gas molecules will move from the high pressure area to the low pressure area, forming the wind. The intensity, blowing time and wind direction are influenced by a number of factors such as weather, vegetation, water surface and topography.

All of these volatile factors make the wind unpredictable and become one of the reasons for the concern that wind is never stable enough to provide for human energy needs. The most predictable winds blow around the coast, increasing the cost of building wind farms.

4. Wind power does not pose a threat to birds

One of the main concerns of the opposition to wind power is the danger of wind turbines to wildlife, especially birds. However, despite its enormous size and dangerous speed, the wind turbines do not affect the wildlife, or flight paths of birds. Research by the National Academy of Sciences in the United States confirmed that the number of birds killed by wind farms accounts for only a negligible proportion of the total number of birds killed by humans.

5. World wind power output increased 4 times from 2000 to 2006

Wind power output increased rapidly from 2000 to 2006. Even in the year of global economic downturn in 2009, the wind power industry still developed strongly. This year alone, world wind power production has increased to 158,000 MW. Wind power is now able to meet the electricity needs of 250 million people and more than 70 countries already have wind farms.

According to a UN report, switching from fossil fuels to renewable energy (not just wind) requires more than $ 12 trillion. This commitment is not easy to implement in the next two decades, especially when traditional materials are still relatively cheap. Therefore, to maintain growth from 2000 to 2006, governments need more incentives to encourage wind power development.