Economics are pushing the size of wind turbines upwards. Having fewer, larger turbines reduces the number of expensive towers, foundations, erection operations and power collection cables that are needed. This is more crucial in the offshore sector, where the largest turbines can therefore be ...
The wind loses some of its kinetic energy (energy of movement) and the turbine gains just as much. As you might expect, the amount of energy that a turbine makes is proportional to the area that its rotor blades sweep out; in other words, the longer the rotor blades, the more energy ...
The most effective way to combat the corrosive effects of humidity and salt inside wind turbine nacelles and towers is with a dry and salt-free environment inside the turbine.
Gas turbine engines are smaller than their reciprocating counterparts of the same power. The main disadvantage of gas turbines is that, compared to a reciprocating engine of the same size, they are expensive. Because they spin at such high speeds and because of the high operating temperatures...
transferring some of its own energy of motion to the blade. This is how a wind turbine captures energy from the wind. The same thing happens with a sail boat. When moving air pushes on the barrier of the sail, it causes the boat to move. The wind has transferred its own energy of ...
What's more, computers let engineers adjust infinite variables of the model and the test section without time-consuming (and expensive) manual labor. Physical tunnels are sometimes used only to retest the results of computer modeling. Construction engineers use computer modeling for wind engineering ...
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The less expensive models generally only have a single panel and, as a result, less overall capacity. One company has even introduced a more robust version in the form of an over-the-shoulder bag that can generate a whopping 15 watts of energy -- enough juice to charge your laptop. That...
“Yes, there’s a lot from the offshore industry that technically speaking could have been used, but the problem was to make the whole thing pay off based on the price of electricity alone. You can forget all about expensive solutions, you have to make it simple.” ...
New technologies are also expensive; almost every plasma application requires a custom built facility. Until facility production can be standardized, costs will be high for plasma plants. Aside from the cost of custom building the plant, other costs are a major factor. Until very recently, land ...