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.
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
Brad nailers and finish nailers can be compared based on the size of nails they use and the type of woodworking projects for which they are appropriate. Brad nailers use brads made of 18 gauge wire, which is thinner than the 15 and 16 gauge wire used in finish nailers. Carpenters often use a brad nailer to attach small moldings and trim to keep them from splitting.Full Answer >
What two things are compared, the positive attributes and similarities between them are judged in relation to each other. It may also be decided if one item has superior qualities to the other.Full Answer >
Most garbage disposal systems require a 1/4-inch Allen wrench to free up the impeller. Most garbage disposal systems come with the appropriate Allen wrench to do this; however, these can easily be lost, especially if the garbage disposal system was already installed in the house.Full Answer >
The price of a cord of wood varies greatly depending on the type of wood, availability, the geographical location and the location of the purchaser in relation to the seller. Prices can range from $50 to $100 a cord for mixed hardwood.Full Answer >