CN105226993A - Wind power generation plant - Google Patents
Wind power generation plant Download PDFInfo
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- CN105226993A CN105226993A CN201410287364.2A CN201410287364A CN105226993A CN 105226993 A CN105226993 A CN 105226993A CN 201410287364 A CN201410287364 A CN 201410287364A CN 105226993 A CN105226993 A CN 105226993A
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- oviduct
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Abstract
The present invention discloses a kind of wind power generation plant, comprises oviduct, at least one support frame and multiple piezoelectric element.Oviduct has relative first end and the second end, and oviduct is convergent from the sectional area of sectional area to the second end of first end.Each support frame is built in a wherein cross section of oviduct and comprises many cantilevers.These piezoelectric elements are configured at these cantilevers.
Description
Technical field
The present invention relates to a kind of Blast Furnace Top Gas Recovery Turbine Unit (TRT), and particularly relate to a kind of wind power generation plant.
Background technology
Traditional electricity-generating method has hydroelectric power generation, thermal power generation, nuclear electric power generation etc., but these have such as because of the problem such as corollary failure, exhaust emission, radiant energy that dam causes.Therefore, advanced country or short petroleum resources country, there's no one who doesn't or isn't greatly develop alternative energy source, to replace traditional electricity-generating method.Accordingly, various natural resources also successively develop corresponding generation mode.
For example, wind energy is a kind of available energy produced because of air current flow, and it has abundant, renewable, widely distributed, not produce pollution advantage.Wherein the mode of wind power generation is, by rotors such as blade, screw or impellers, Wind resource change is become a mechanical energy, then through gear train raising speed, makes mechanical energy be electric energy.
Summary of the invention
The object of the present invention is to provide a kind of wind power generation plant, it provides the mode of another kind of wind power generation.
In order to reach above-mentioned purpose, a kind of wind power generation plant of the present invention, comprises oviduct, at least one support frame and multiple piezoelectric element.Oviduct has relative first end and the second end, and oviduct is convergent from the sectional area of sectional area to the second end of first end.Each support frame is built in a wherein cross section of oviduct and comprises many cantilevers.These piezoelectric elements are configured at these cantilevers.
In one embodiment of this invention, wind power generation plant also comprises the first ring frame, the inner surface of contact oviduct, and one end of these at least part of cantilevers is connected to the first ring frame.
In one embodiment of this invention, wind power generation plant also comprises the second ring frame, and with the concyclic heart of the first ring frame, and one end of these at least part of cantilevers is connected to the second ring frame.
In one embodiment of this invention, the quantity of above-mentioned support frame is multiple, and these support frames are configured at the different cross section of oviduct along the axis direction of oviduct.
In one embodiment of this invention, above-mentioned these cantilevers on any two these support frames towards oviduct arbitrary cross section projection in the plane not overlapping.
In one embodiment of this invention, between 0.04 times to 0.06 times that the distance (centimetre) between above-mentioned wantonly two adjacent these support frames is about the air flow rate (cubic meter/per minute) flowing through oviduct.
In one embodiment of this invention, the above-mentioned support frame near first end arbitrary cross section of oviduct projected area be in the plane not more than 35% to 50% of area of section.
In one embodiment of this invention, in above-mentioned two adjacent these support frames in office, near first end support frame arbitrary cross section of oviduct projected area ratio in the plane near the second end support frame cross section projected area many 15% in the plane.
In one embodiment of this invention, the quantity of above-mentioned support frame is four.
Based on above-mentioned, in wind power generation plant of the present invention, oviduct is convergent from the sectional area of sectional area to the second end of first end, therefore, according to the principle of aerodynamics and the conservation of mass, when air-flow is flowing into from first end and can be accelerated, to promote flow velocity and the kinetic energy of air-flow from the process of the second end outflow oviduct.In addition, the support frame with cantilever is built in oviduct, and cantilever is configured with multiple piezoelectric element, can cantilever be shaken during airflow passes oviduct at a high speed, and then make piezoelectric element shake and generate electricity.In addition, wind power generation plant of the present invention these cantilevers on any two support frames towards oviduct arbitrary cross section projection in the plane not overlapping.Thus, can guarantee that the cantilever being positioned at rear can not be stopped by the cantilever in front, and these piezoelectric elements all suitably can be collided with air-flow, crushing in oviduct also can be avoided excessive, cause back pressure and affect the situation of airduct airflow exits.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and the accompanying drawing appended by coordinating is described in detail below.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of wind power generation plant of one embodiment of the invention;
Fig. 2 is the support frame of the wind power generation plant of Fig. 1 and the schematic diagram of piezoelectric element.
Symbol description
W: air-flow
100: wind power generation plant
110: oviduct
112: first end
114: the second ends
120: support frame
122: cantilever
124: the first ring frames
126: the second ring frames
128: linking arm
130: piezoelectric element
Embodiment
Wind power generation plant of the present invention is configurable in the environment (being such as be configured on the airflow exits runner of scrubbing tower or air-conditioning box etc.) with steady air flow, with by Wind resource change for electric energy.Fig. 1 is the schematic diagram of a kind of wind power generation plant according to one embodiment of the invention.Fig. 2 is the support frame of the wind power generation plant of Fig. 1 and the schematic diagram of piezoelectric element.Refer to Fig. 1 and Fig. 2, the wind power generation plant 100 of the present embodiment comprises oviduct 110, at least one support frame 120 and multiple piezoelectric element 130.Oviduct 110 has relative first end 112 and the second end 114, and oviduct 110 is convergent from the sectional area of sectional area to the second end 114 of first end 112.
According to the theory of aerodynamics and the conservation of mass, oviduct 110, from the change of shape of first end 112 to the second end 114, can make to be accelerated by the air-flow W of oviduct 110.It is below mass-conservation equation formula (1).
Wherein,
for the mass flowrate of air-flow W, ρ is the density of air-flow W, and V is the flow velocity of air-flow W by sectional area A.That is, be definite value in the mass flowrate of air-flow W, and oviduct 110 is convergent from the sectional area of first end 112 to the second end 114, air-flow W can in continuing acceleration mode in the process flowing through oviduct 110.In other words, in the present embodiment, wind power generation plant 100 utilizes the change of shape of oviduct 110 to promote the flow velocity of air-flow W, further promotes the kinetic energy of air-flow W.
Table one shows the flow speed value of the air-flow W of oviduct on different cross section and the value of wind energy momentum.As shown in Table 1, the sectional area of wind speed and oviduct is inversely proportional to, and wind energy momentum P is directly proportional to wind speed.It is below the computing formula (2) of wind energy momentum P.
P＝M*V1(2)
Wherein, M is the flow quality of unit area, and V1 is air-flow velocity.It can thus be appreciated that the less place of the sectional area of oviduct (namely getting over the position of rear end), air-flow velocity is larger, and wind energy momentum is also larger.
Table one
Each support frame 120 is built in a wherein cross section of oviduct 110 and comprises many cantilevers 122.As shown in Figure 2, these piezoelectric elements 130 are configured at these cantilevers 122.Therefore, when air-flow W flows through oviduct 110, air-flow W at a high speed can strike the support frame 120 being positioned at oviduct 110, and presses to piezoelectric element 130 and the cantilever 122 of support frame 120 is shaken.Wind resource change can be just electric energy because of piezoelectric effect by piezoelectric element 130.
Specifically, piezoelectric effect is the phenomenon that in dielectric substance, a kind of mechanical energy and electric energy exchange.Because the atom of piezoelectric element 130 presents specific arrangement mode in lattice, it is made to there is the effect of stress field and field coupled.When exerting pressure to piezoelectric element 130, the electric dipole moment in piezoelectric element 130 can shorten because of compression, and now piezoelectric element 130 is that this change of opposing can produce equivalent positive and negative charge to maintain the original state on the surface that material is relative, and generating electric energy.
Therefore, in the present embodiment, wind power generation plant 100 is by the profile design of oviduct 110, make the air-flow raising speed flowed through, and piezoelectric element 130 is configured on cantilever 122, be subject to air-flow W to make piezoelectric element 130 and exert pressure and can shake along with cantilever 122 and and then shake, and output electric energy.
The present embodiment provides a kind of structure of support frame 120, piezoelectric element can be made to receive larger external force, and obtain larger power benefit.As shown in Figure 2, the support frame 120 of the present embodiment also comprises the first ring frame 124 and the second ring frame 126 of the concyclic heart, first ring frame 124 contacts the inner surface of oviduct 110, the second ring frame 126 be positioned at the first ring frame 124 and with the first ring frame 124 copline.Cantilever 122 radially extends from the first ring frame 124 or the second ring frame 126, namely presents radial arrangement mode as illustrated in fig. 2.
As shown in Figure 1, in the present embodiment, because air-flow W is greater than near peripheral speed when flowing through oviduct 110 near the speed in axle center, larger power benefit can be obtained to make wind power generation plant 100, cantilever 122 between the first ring frame 124 and the second ring frame 126 is specially connected to the first ring frame 124 by the wind power generation plant 100 of the present embodiment, and and between the second ring frame 126, there is a distance, and, 122, the cantilever be positioned within the second ring frame 126 is connected to the second ring frame 126, the other end near axle center is then unsettled.Thus, comparatively bearing is closer to shaft core position at the unsettled place of these cantilevers 122, and the air-flow W that can be subject to higher speed shakes, and makes the piezoelectric element 130 be positioned on cantilever 122 can produce more electric energy.In addition, in the present embodiment, be connected by several linking arm 128 between the first ring frame 124 with the second ring frame 126, with fixing relative position between the two.
Certainly, in other embodiments, the shape of support frame 120 is not as limit, support frame 120 only can have the first ring frame 124, support frame 120 also can have two eccentric ring frames, or support frame 120 also can have more than three the concyclic hearts or the ring frame of bias, as long as can be used for cantilever 122 to fix.In addition, cantilever 122 may not be and extends along the first ring frame 124 or the radial direction of the second ring frame 126, and cantilever 122 is fixed on the first ring frame 124 or one end of the second ring frame 126 and the unsettled other end also can not on the same cross section of oviduct 110.Or, in other embodiments, unsettled one end of cantilever 122 also can be closer periphery place (namely comparatively away from axle center place), although air-flow is slower near peripheral speed, but still cantilever 122 can be made to shake, and allowing piezoelectric element 130 generate electricity, the conditions such as the orientation of cantilever 122 and bearing of trend are not with the above-mentioned system that is limited.
As shown in Figure 1, these support frames 120 are configured at the different cross section of oviduct 110 along an axis direction of oviduct 110, and interval one specific range between wantonly two adjacent these support frames 120.Flow with air-flow W can decide by the spacing distance between support frame 120, and mainly large with the flow of air-flow W, the spacing distance between support frame 120 is principle more greatly.Spacing distance between support frame 120 is relevant with power meter formula and fluid boundary effect layer.Due to the product that power is resistance and distance, the spacing distance between support frame 120 is larger, and resistance power is higher.Spacing distance between support frame 120 is less, when fluid passes through support frame 120, boundary layer has not yet been developed, region before support frame 120 square is after arrival produced air flow vacuum effect, empirically be worth, between 0.04 times to 0.06 times that the distance (centimetre) between wantonly two adjacent these support frames 120 can be the air flow rate (cubic meter/per minute) flowing through oviduct 110.
More particularly, the oviduct 110 of 50 centimetres is about with air quantity 300 (cubic meter/per minute) of originating, length, and there is the wind power generation plant 100 of four support frames 120, the spacing between wantonly two adjacent these support frames 120 can be 12 centimetres.Certainly, the spacing between support frame 120 can be different from the quantity of the size of oviduct 110 and support frame 120, not with the above-mentioned system that is limited.In addition, the spacing between two adjacent support frames 120 also can not be definite value, such as, configures a fairly large number of support frame 120 in the first half section of oviduct 110, the support frame 120 of second half section preparation negligible amounts, or on the contrary.
It is noted that these cantilevers 122 on any two these support frames 120 towards oviduct 110 arbitrary cross section projection in the plane not overlapping.In other words, flow into the process of the second end 114 outflow at air-flow from the first end 112 of oviduct 110, the cantilever 122 being positioned at rear can not be stopped by the cantilever 122 in front, can guarantee that the piezoelectric element 130 on cantilever can receive air-flow, also can avoid occurring projection because of support frame 120 overlapping and cause crushing in oviduct 110 excessive, cause back pressure and affect the situation of airflow exits.
Table two is that the support frame 120 of Cover treatment area is configured in sectional area in oviduct 110 is on the cross section of 1 square metre in explanation, the Resistance Value of air-flow by obtaining during support frame 120.It is below the computing formula (3) of resistance Fd.
Fd＝0.5*ρ*V2^2*Cd*A2(3)
Wherein, ρ is density, and V2 is air-flow Negotiation speed, and Cd is resistance coefficient, and A2 is the area of support frame 120.In the present embodiment, density value is 0.18, and resistance coefficient value is 0.25.As shown in Table 2, the area A 2 of the support frame 120 that the cross section being 1 square metre along with sectional area in oviduct 110 configures is less, and air-flow is less by the Resistance Value obtained during support frame 120.
Table two
In order to make air-flow by time, piezoelectric element 130 can obtain more energy, and the numerical value of wind energy momentum P is larger, and the numerical value of resistance is less is good.It is noted that due to the area of support frame 120 too little, the quantity of configuration piezoelectric element 130 thereon also can be restricted, and therefore, support frame 120 also needs certain area is occupied in the cross section in oviduct 110.In the present embodiment, it is the most profitable interval that these piezoelectric elements 130 on each support frame 120 about occupy area ratio on the cross section, place of support frame 120 between 35% to 50%.Further, the area occupied of piezoelectric element 130 on the cross section, place of support frame 120 for the upper limit, otherwise goes out wind condition by what cause back-pressure to affect oviduct 110 with 50%.
In addition, known according to table two, configure multiple support frame 120 in oviduct 110 time, it is larger the closer to the area of the support frame 120 of first end 112 that projected area between these support frames 120 is closed, for example, in two adjacent these support frames 120 in office, near first end 112 support frame 120 arbitrary cross section of oviduct 110 projected area ratio in the plane near the second end 114 support frame 120 cross section projected area many 15% in the plane.That is, from near first end 112 in the support frame 120 of these sequential near the second end 114, support frame 120 arbitrary cross section of oviduct 110 projected area in the plane successively decrease with 15%, to make air-flow when the support frame 120 by these layers, because resistance loss is within acceptable scope, and the energy trasfer of overall wind energy to the piezoelectric element 130 on support frame 120 is enable to reach optimization.Certainly, the amplitude that the percentage value that area reduces may narrow at different section according to oviduct 110 and different, not with above-mentioned value for restriction.
In the present embodiment, the quantity of support frame 120 is for four, but the quantity of support frame 120 is not as restriction, the quantity of designer's visual demand increase and decrease support frame 120.But it is noted that be inversely proportional to because the kinetic energy of air-flow W increases with distance, if the area of the support frame 120 of each layer is with 15% successively decrease, total if the number of plies of support frame 120 will cause resistance significantly to rise more than four layers, and make wind energy increase limited.Therefore, the support frame 120 crossing multilayer may be only increase cost on foot, and energy output may not have obvious increase.
In addition, in the present embodiment, near first end 112 support frame 120 arbitrary cross section of oviduct 110 projected area in the plane equal in fact 50% sectional area in cross section.But near the relation between the projected area of the support frame 120 of first end 112 and the sectional area of the second end 114 not as restriction.
In sum, in wind power generation plant of the present invention, oviduct is convergent from the sectional area of sectional area to the second end of first end, therefore, according to the principle of aerodynamics and the conservation of mass, when air-flow is flowing into from first end and understanding by lasting acceleration, to promote flow velocity and the kinetic energy of air-flow from the process of the second end outflow oviduct.In addition, the support frame with cantilever is built in oviduct, and cantilever is configured with multiple piezoelectric element, can cantilever be shaken during airflow passes oviduct at a high speed, and then make piezoelectric element shake and generate electricity.In addition, wind power generation plant of the present invention these cantilevers on any two support frames towards oviduct arbitrary cross section projection in the plane not overlapping.Thus, can guarantee that the cantilever being positioned at rear can not be stopped by the cantilever in front, and make these piezoelectric elements all can receive air-flow, crushing in oviduct also can be avoided excessive, cause back pressure and affect the situation of airduct airflow exits.
Although disclose the present invention in conjunction with above embodiment; but itself and be not used to limit the present invention; have in any art and usually know the knowledgeable; without departing from the spirit and scope of the present invention; a little change and retouching can be done, therefore being as the criterion of should defining with the claim of enclosing of protection scope of the present invention.
Claims (10)
1. a wind power generation plant, its characteristic, at what, comprising:
Oviduct, has relative first end and the second end, wherein this oviduct from the sectional area of this first end to the sectional area of this second end be convergent;
At least one support frame, respectively this support frame is built in a wherein cross section of this oviduct and comprises many cantilevers; And
Multiple piezoelectric element, is configured at those cantilevers.
2. wind power generation plant as claimed in claim 1, its characteristic is at what, and wherein respectively this support frame also comprises the first ring frame, contacts the inner surface of this oviduct, and one end of those at least part of cantilevers is connected to this first ring frame.
3. wind power generation plant as claimed in claim 2, its characteristic is at what, and wherein respectively this support frame also comprises the second ring frame, and with the concyclic heart of this first ring frame, and one end of those at least part of cantilevers is connected to this second ring frame.
4. wind power generation plant as claimed in claim 1, its characteristic is at what, and wherein the quantity of this at least one support frame is multiple, and those support frames are configured at the different cross section of this oviduct along the axis direction of this oviduct.
5. wind power generation plant as claimed in claim 4, its characteristic at what, those cantilevers wherein on any two those support frames towards this oviduct arbitrary cross section projection in the plane not overlapping.
6. wind power generation plant as claimed in claim 4, its characteristic at what, between 0.04 times to 0.06 times that the distance wherein between wantonly two adjacent those support frames is about the air flow rate flowing through this oviduct.
7. wind power generation plant as claimed in claim 4, its characteristic at what, wherein near this first end this support frame arbitrary cross section of this oviduct projected area in the plane equal in fact the sectional area of this second end.
8. wind power generation plant as claimed in claim 4, its characteristic is at what, wherein in two adjacent those support frames in office, near this first end this support frame arbitrary cross section of this oviduct projected area ratio in the plane near this second end this support frame this cross section projected area many 15% in the plane.
9. wind power generation plant as claimed in claim 4, its characteristic is at what, and wherein the quantity of this support frame is four.
10. wind power generation plant as claimed in claim 1, its characteristic is at what, and those piezoelectric elements wherein respectively on this support frame about occupy the area of 35% to 50% on the cross section, place of this support frame.
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