Conditions of use of small wind turbines

A small wind turbine use in wind resources should generally be richer regions. The annual average wind speed at 3m / s or more, the annual 3-20m / s wind speed and effective than the cumulative number of hours 3000h; annual 3-20m / s average wind power generator density lOOW/m2 more effective. In the choice of using wind turbines, we should be aware of to avoid blindness, so as to fully utilize the local wind resource, to maximize the efficiency of wind turbines, achieve a higher economic efficiency.

It should be noted that in the wind resource-rich regions, the best choice for fans rated the best design design wind speed and wind speed coincides with the local wind generator. If can do this either from the choice of wind turbine generator , or the use of wind resources in the economic sense has an important significance. Wind tunnel tests proved that convert the wind power and wind wheel is proportional to the cube, ie, wind speed, the greatest impact on power. For example, the best in local design wind speed is 6m / s in the area, the installation of a nominal design wind speed is 8m / s small wind turbines , the results of its rated output power is only reached in the original design output power of 42%, that is, wind turbine rated power output lower than the design value of 58%. If the use of china wind generators design wind speed rated higher then its rated power output of the results will be even more unsatisfactory. But it must be pointed out that the design of home wind turbine rated wind speed is low, the wind wheel diameter, the motor relative to increased cost of the corresponding machine also increased. Products from the manufacturing and economic sense to consider are does not pay.

Second, the use of small wind power executive general requirements

Currently, small wind turbines are used battery energy storage, electric household appliances provided by the battery. Therefore, the general principle when electricity is discharged battery can give additional time by the wind turbine. In other words, battery charging and use of electricity into the electrical power consumption required to be approximately equal (usually on a daily basis). Here s an example of this problem: use an area of a wind generator, wind speed rated output power IOOW, assumptions, the equivalent of one day in the region rated wind speed, wind Chuigua hours continuously for 4h, then the fan on the output and stored to the battery in the energy 400Wh. Taking into account the conversion efficiency of lead-acid batteries, 70%, the user can use with the actual electrical energy 280Wh.