For the purpose of this subchapter, the following definitions shall apply unless the context clearly indicates or requires a different meaning.
AMBIENT. The sound pressure level exceeded 90% of the time or L90.
ANSI. American National Standards Institute.
COMMERCIAL GRADE WIND ENERGY SYSTEMS. A commercial grade wind energy system shall be greater than 25 kw and shall be intended to primarily serve the needs of the customer.
DB(A). The sound pressure level in decibels. Refers to the “a” weighted scale defined by ANSI. A method for weighing the frequency spectrum to mimic the human ear.
DECIBEL. The unit of measure used to express the magnitude of sound pressure and sound intensity.
IEC. International Electrotechnical Commission. The IEC is the leading global organization that prepares and publishes international standards for all electrical, electronic, and related technologies.
ISO. International Organization for Standardization. ISO is a network of the national standards institutes of 156 countries.
ON SITE USE WIND ENERGY SYSTEMS. An on site use wind energy system is intended to primarily serve the needs of the consumer and shall be less than 25 kw.
ROTOR. An element of a commercial grade wind energy system that acts as a multi-bladed airfoil assembly, thereby extracting through rotation, kinetic energy directly from wind.
SCADA TOWER. A freestanding tower containing instruments such as anemometers that is designed to provide present moment wind data for use by the supervisory control and data acquisition (SCADA) system.
SHADOW FLICKER. Alternating changes in light intensity caused by the moving blades of a wind energy system casting shadows on the ground and stationary objects, such as a window at a dwelling.
SOUND PRESSURE. Average rate at which sound energy is transmitted through a unit area in a specified direction. The pressure of the sound measured at a receiver.
SOUND PRESSURE LEVEL. The sound pressure mapped to a logarithmic scale and reported in decibels (Db).
UTILITY GRADE WIND ENERGY SYSTEMS. A utility grade wind energy system is designed and built to provide electricity to the electric utility grid.
WIND ENERGY SYSTEM. A wind energy conversion system which converts wind energy into electricity through the use of a wind turbine generator, and includes the turbine, blades, and tower as well as related electrical equipment. This does not include wiring to connect the wind energy system to the grid.
WIND SITE ASSESSMENT. An assessment to determine the wind speeds at a specific site and the feasibility of using that site for construction of a wind energy system.
(Ord. passed 5-13-2009)