Wind generators, or small wind electric systems, can be compared according to how much energy the system generates, the cost of the system in relation to the cost of conventional electricity, the size of the wind turbine and the height of the tower. Other factors include the level of noise the turbine makes and the materials with which the system is made.Know More
To power residences, wind turbines range from 400 watts to 100 kilowatts. Smaller turbines can be used for such jobs as pumping water and charging batteries. Costs are generally based on the amount of kilowatts generated. Some systems are hooked up to the utility grid, so that when the wind generator does not meet electricity requirements, the conventional utility can make up the difference. Other systems, called hybrids, go completely off-grid. These can provide power for homes and farms that are far from utility lines. The wind generator provides the primary power, but when wind is low, either batteries or an engine generator run on a fuel such as diesel, supplies the power.
Taller towers usually generate more power, as wind speeds increase with height. Towers can be either free-standing or guyed, with guyed towers needing more space. Tilt-down towers, though more expensive, offer the option of lowering the tower for maintenance or during dangerous weather. The U.S. Department of Energy suggests not purchasing aluminum towers, which tend to crack.Learn more about Tools
A typical wind power generator produces approximately 30 percent of the theoretical maximum power it could produce on average, as reported by the European Wind Power Administration and Global Wind Energy Council. Losses of efficiency due to the mechanical action of the generator are already included in the theoretical maximum.Full Answer >
A gas-powered Kubota Zero Turn Mower offers the operator the convenience of having more places to purchase fuel, while the diesel variety uses less fuel and pours fewer emissions into the atmosphere. The choice of fuel does not affect how the machine operates.Full Answer >
As of 2015, restored Farmall tractors generally sell in the range of a few thousand dollars. However, since they have been discontinued for almost 50 years, there is no consensus or suggested retail price for the tractors.Full Answer >
A double pulley system, also known as a block and tackle, provides a mechanical advantage that allows for increased lifting force to be applied when pulling a rope or cable. By dividing weight between multiple pulleys, heavier objects may be lifted with less overall effort.Full Answer >