Naslov
New high profitable wind turbines

Autori
Franković, Bernard ; Vrsalović Ivan

Izvornik
Renewable energy (0960-1481) 24 (2001), 3-4; 491-499

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Electric energy from wind; wind turbine; nozzle shell; wind turbine efficiency; economic analysis

Sažetak
To generate more quantities of electric energy from wind it is necessary to use a new type of wind turbine built in regulable mantle’s nozzle. This wind turbine type replaces the free air stream from wind by a programmed, i.e. regulated, and partially concentrated stream of air. The nozzle shell is designed as aerodynamically shaped ring with wings with its lower pressure side pointed towards the center so that the lift force on each part of the wing is directed radial towards the center. This induces centrifugal reaction force in the airflow that causes the stream field to expand strongly downstream of the rotor and includes a greater number of streamlines in the active stream in front of the rotor (upstream). Thus the nozzle forces a higher mass flow rate of air through the turbine. The higher mass flow and higher velocity reduction behind the rotor result in a higher energy output from the wind turbine in the nozzle. In this way the wind turbine efficiency is multiplied. New turbines induce more power from weaker and medium winds and their lasting time, because of the relation (i.e. the power corresponds to wind velocity raised to third power). Wind turbine nozzle produces three times more energy than conventional wind turbine. Short economic analysis for conditions of the island of Lastovo indicates that profit gained by new turbines is up to five times higher than by conventional turbines. The new wind turbine nozzle should generate interest and demand on an international market, even for regions with weaker winds.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA