Rotary kinetic fluid motors or pumps – With means for controlling casing or flow guiding means in...
Patent
1996-07-08
1999-04-20
Kwon, John T.
Rotary kinetic fluid motors or pumps
With means for controlling casing or flow guiding means in...
415 44, 415907, F03D 700
Patent
active
058952012
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to an aeroturbine comprising a body, guide walls formed therein for guiding the wind, a rotor chamber adapted above said body, said rotor chamber housing a rotor therein, and control and gate flaps which are adapted close to said rotor chamber so as to be suited for controlling the air flow.
Aeroturbines are used to harness wind energy. Conventional aeroturbine designs are not suited for efficient utilization of light winds and winds with varying direction. A further complication often arises from the awkward control of the prior-art aeroturbines.
It is an object of the present invention to provide an aeroturbine whose rotation starts at wind speeds lower than those utilizable in the prior art and has enhanced efficiency for operation in winds with varying direction, and further offers improved controllability.
The goal of the invention is achieved by an aeroturbine construction characterized by what is stated in the appended claims.
In an aeroturbine according to the invention, below the rotor is arranged an air chamber having its bottom formed by control and gate flaps, and the cover of the air chamber separating the air chamber from the rotor chamber has adjustable nozzle channels. With the help of wind speed sensors included in the aeroturbine assembly, the gate vanes on the windward side can be controlledly opened thus permitting effective operation of the aeroturbine. The advantageous construction of the aeroturbine provides the aeroturbine with a maximum area of the air inlet which is suited for harnessing both horizontal and vertical wind streams.
In an advantageous embodiment of the invention, the exhaust chamber above the rotor forms an upward flaring conical space, the conical space houses a lens-shaped element formed by surfaces of rotation of opposed arc segments, and said space and said element of rotation of arc segments are enclosed in a cylindrical shell which is conically tapered at its upper end. The element of rotation formed by the opposed spherical surfaces, together with the cylindrical shell enclosing them, induces a swirling air flow, whose effect is to cause a negative pressure that increases the exit velocity of the air flow from the aeroturbine rotor.
In a second embodiment of the invention, the body is conically shaped and a tapering flow channel is formed by the body inner walls together with auger-curved guide walls. In a sideways wind and by virtue of the induced negative pressure, this construction achieves a minimally obstructed entry of air streams into the tapering flow channel delineated by the auger-curved guide walls of the conical body of the aeroturbine. Thus, air flow will be induced already by a light wild in the air flow channel.
The aeroturbine construction according to the invention offers a wide inlet area of air streams relative to the total area of the nozzle channels, whereby even the smallest winds can be harnessed for economically important energy production. Moreover, the control possibilities of the aeroturbine are essentially improved and the operating limitations caused by varying wind directions and weather conditions are relaxed.
The invention is next examined with reference to attached drawings, in which:
FIG. 1 is a side view of an embodiment of the aeroturbine according to the invention;
FIG. 2 is a sectional top view of the aeroturbine illustrated in FIG. 1; and
FIG. 3 is a cross-sectional view of the aeroturbine illustrated in FIG. 1 sectioned along the plane 3-3.
With reference to the embodiment shown in the drawings, the aeroturbine comprises a conical body 1 housing placed therein four guide walls 2, 3 of an auger-curved shape, an upper cone 4 attached to the conical body, wind speed sensors 5 adapted to the conical body, and control and gate flaps 6 forming the bottom of the hollow cylindrical air chamber 7, a cover 13 of the air chamber with adjustable nozzle channel 8 adapted to the cover, and a rotor 9 situated above the air chamber and placed in the lower part of the exhaust chamber formed by an upward flar
REFERENCES:
patent: 4154556 (1979-05-01), Webster
patent: 4421452 (1983-12-01), Rougemont
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