How many of you have found your self in the exact same position as described at the beginning of this article? There is no way to “casually” explain why wind is bad.
In a casual conversation, I was asked why wind energy is a bad idea. Once again, I realized that a one or two-word answer could not convey a readily understandable and accurate picture of wind energy.
This article will try to provide such an answer in a few hundred words, where one or two won’t suffice.
There are essentially four reasons why wind energy is a bad idea.
- It is unreliable
- It is very, very expensive
- It produces electricity when it isn’t needed
- It has environmental issues
Wind can only produce electricity when the wind is blowing at between 6 mph and 55 mph. Above 6 mph, it gradually increases its output until it reaches a maximum output at around 35 mph. Above 55 mph, the wind turbine is shut down to prevent damage to the turbine.
The wind can stop blowing abruptly, so backup power generation must be immediately available to replace the wind generated electricity, or the grid could collapse causing blackouts.
Typically, gas turbine generators are kept running 24/7 so they are available to be rapidly brought online.
A sufficient number of gas turbine generators must kept running at all times to be ready for when the wind stops blowing. This varies by region and on the reliability of day-ahead weather forecasts.
The electricity generated by wind has an intrinsic cost, based on leveled cost of electricity (LCOE) of around 11 cents per kWh. This compares with around 5 cents per kWh for natural gas combined cycle (NGCC) power plants and around 6 cents for coal-fired power plants.
But there are other costs for wind energy that are seldom taken into consideration, and not included in LCOE calculations.
Continue reading here : Power for USA, Aug 12 2014,