Before anyone runs out to purchase any used wind turbine parts from a junk yard there are a few facts
that one should know. The ESI 54S's are very reliable machines. They are being removed from their present locations to make room for newer and larger machines. These large machines are virtually useless for a stand alone application. They require connection to the three phase grid for their overspeed protection. The grid provides a rather tremendous load upon these machines matching the turbines rated power output exactly due to the physics involved. In essence one would be required to match the output capabilities of the turbine constantly for safe operation. I can't think of anyone I know who requires a constant 85,000 watts for domestic use. These machines also require the grid to excite the stator windings before power generation can take place.
Imagine a turbine with a 54 ft. rotor diameter flying apart from an overspeed condition. It is not a pretty nor safe event. Anything coming from a junk yard is just that, junk, especially when you don't know what your doing or what to look for. When these machines are torn down they go through very brutal treatment. The most important sub-assemblies "the Hub and Blades" are usually the first to go, the hub for smelting as it is made from cast steel, and the blades for recycled plastics. The demand for these materials is astounding due to the energy savings involved in reprocessing. Smaller turbines such as the Carter 25 might be used for stand alone applications with some modifications. For anyone interested in used wind turbine blades for modification consider Customizing Tips and Reconditioned wind turbines. I would hate to see anyone go to the expense of purchasing one of these used turbines and then have to sell it back for scrap at about $0.21 on the dollar.
Even if one is offered a very attractive price, there are a lot of logistics involved in the consideration of their usage. It is conceivable that six machines could be used to power a small village or enclave, but you would require very favorable wind conditions and placement for proper operations. If each machine would come with one complete set of replacement blades it would be a dream come true. You might contact the sales department and ask if they include the maintenance and overhaul record of each machine (serial no. contactor hours for each sub assy. etc.). If these records are unavailable, then count on the fact that something is rotten. Most states would require that the owner of such machines have a minimum of $1,000,000.00 in liability insurance per machine and no wind turbine with a rotor diameter larger than 30 ft. be installed closer than 500 ft. to a dwelling. There are just so many logistics involved; check out the laws in your area before considering such an endeavor.
Offered by Jay.