JP2007154759A - Hybrid type wind power generating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hybrid type wind power generating device capable of efficiently recovering both of remaining energy of exhaust gas or discharged air and energy of natural wind with a relatively compact device. <P>SOLUTION: The hybrid type wind power generating device has outlet parts 31, 32 of an exhaust duct and a vertical wind turbine blower impeller part 1 provided closely each other, and generate electric power by rotating the blower impeller part 1 by natural wind and exhaust gas wind discharged from the outlet parts 31, 32 of the exhaust duct. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a hybrid wind power generator that generates power by using both residual energy contained in exhaust gas discharged from a factory and natural wind energy.

  The factory is equipped with various types of industrial heating furnaces such as blast furnaces, heat treatment furnaces and boilers. In order to heat air or the like introduced into this type of industrial heating furnace, it is common to inject petroleum-based fuel into the furnace and combust it because the equipment cost can be reduced most. Due to soaring fuel costs in recent years, the air introduced into the industrial heating furnace is indirectly heated with the exhaust gas from the industrial heating furnace and preheated, or the generator with an exhaust turbine is used with the high-temperature and high-pressure exhaust gas discharged from the blast furnace. Energy-saving technology that generates electricity is known.

The following Patent Document 1 proposes an exhaust air power generation apparatus that generates and recovers residual energy of building exhaust air that is mainly velocity energy.
JP-A-64-87878

  In the power generation device using the building exhaust air described in Patent Document 1, it is difficult to increase the static pressure of the exhaust air, and thus power generation is performed mainly using the velocity energy. It was necessary to flow a large amount of high-speed exhaust air into the impeller, and power generation had to be stopped when the exhaust air flow rate was low or when the exhaust was stopped.

  As another exhaust gas energy recovery technique, a generator with an exhaust turbine that generates power by adiabatically expanding the exhaust gas in a turbine is known as the top power generation of a blast furnace. However, since the pressure of exhaust gas in a general industrial heating furnace is almost atmospheric pressure, the adiabatic expansion effect cannot be used as described above, and even if the residual energy of the exhaust gas is recovered, the exhaust rate is almost the same. Only the energy can be recovered, and furthermore, when the industrial heating furnace is shut down, this power generation facility cannot be operated, and the operation time reflected in the total cost is shortened.

  The present invention has been made in view of the above problems, and provides a hybrid wind power generator capable of efficiently recovering both residual energy of exhaust gas and exhaust air and natural wind energy with a relatively compact device. That is the purpose.

  The hybrid wind power generator of the present invention that solves the above-described problems has an exhaust duct that guides exhaust air or exhaust gas to the outside of a building, an impeller part, and a generator part connected to the impeller part. A wind power generator that is arranged at a predetermined interval at an outlet portion of the exhaust duct and that is driven by the exhaust gas discharged from the outlet portion to the outside air to generate electric power. It is arranged in a drivable position and is characterized in that it generates power by both natural wind and exhaust gas wind.

  That is, the hybrid wind power generator of the present invention is driven by the exhaust air from the building and the exhaust gas from the heating furnace discharged at a high speed to the impeller portion of the wind power generator, and the impeller portion of the wind power generator. By directly introducing natural wind, the impeller is driven directly by natural wind, so the wind power generator can be driven by both exhaust gas (including exhaust air) energy and natural wind energy. The output can be increased with one device.

  In addition, since natural wind is directly introduced into the wind power generator, it does not require a natural wind guide duct structure that introduces natural wind that changes the direction of various winds and always introduces it into the wind turbine section of the wind power generator. There is also an advantage that the space can be reduced.

  In a preferred aspect, the impeller portion of the wind power generator is a vertical windmill. A vertical wind turbine can introduce natural wind from all directions in a horizontal plane without requiring a special natural wind guide mechanism. Furthermore, since the outlet part of the exhaust duct that introduces exhaust gas wind from a predetermined direction to the impeller part of the vertical wind turbine is unlikely to obstruct the introduction of natural wind to this impeller part, wind power generation by natural wind The effect is improved compared to the propeller type windmill.

  That is, in the hybrid wind power generator of the present invention, the flow direction of the natural wind changes variously although the flow direction of the exhaust gas is normally fixed to the impeller portion of the wind power generator. For this reason, in the propeller type windmill, in order to make the impeller portion face the natural wind direction without a horizontal plane, it is necessary to horizontally rotate it, and as a result, the horizontal rotation axis of the propeller type windmill is There arises a problem that the direction is not preferable with respect to the outlet portion of the exhaust duct. Further, in the propeller type windmill, there is a problem that introduction of the natural wind into the propeller type windmill is hindered by providing the outlet portion of the exhaust duct on the upstream side. On the other hand, various known vertical wind turbines do not have a horizontal rotating shaft that rotates like a propeller type wind turbine, and can be driven by natural wind from all directions. It is possible to generate electric power more easily by using both exhaust gas wind and natural wind.

  If a factory building or the like is present near the wind power generator, introduction of natural wind to the wind power generator may be hindered on the leeward side unless a special natural wind guide air path is formed. For this reason, although it is suitable to arrange | position the exit part of a vertical windmill and an exhaust duct in the roof top of a factory building, you may arrange | position at a predetermined distance, for example to the side of a factory building.

  In a preferred aspect, the outlet portion of the exhaust duct is set at a position where the exhaust gas wind is introduced in the same direction as the turning direction of the vertical windmill. As a result, the vertical wind turbine can simultaneously recover the energy of both the exhaust gas wind and the natural wind.

  In a preferred aspect, the outlet portion of the exhaust duct introduces the exhaust gas wind into the outer peripheral portion of the impeller portion of the vertical wind turbine. In this way, the velocity energy of the exhaust gas wind can be efficiently recovered even if the cross-sectional area perpendicular to the flow path at the outlet of the exhaust duct is small. In addition, when the static pressure of an exhaust duct is positive, it is suitable to arrange | position a nozzle structure in the exit part of an exhaust duct, and to increase the velocity energy of the exhaust duct discharged | emitted from the exit part of an exhaust duct.

  In a preferred aspect, a plurality of outlet portions of the exhaust duct are arranged at substantially rotational positions around the rotation axis of the vertical windmill, and the outlet portions are arranged in the direction of rotation of the vertical windmill. Blow out. In this way, the torque balance of the vertical wind turbine can be improved, the durability of the vertical wind turbine can be improved, and the output can be improved.

  In a preferred aspect, at least two outlet portions of the exhaust duct are arranged at substantially line symmetrical positions around the rotation axis of the vertical windmill, and one of the two outlet portions is a rotation direction of the vertical windmill. The exhaust gas is blown out, and the other of the two outlets blows out the exhaust gas in the direction opposite to the rotational direction of the vertical wind turbine. In this way, the torque balance of the vertical wind turbine can be improved.

  In a preferred aspect, the outlet portion of the exhaust duct blows out the exhaust gas wind to a central portion in the radial direction of the impeller portion of the vertical wind turbine more concentrated than the outer peripheral portion of the impeller portion. In this way, exhaust gas wind can be effectively flowed even if the flow rate is limited because exhaust gas wind can flow intensively to the part that generates the largest torque among the respective parts of the impeller part of the vertical wind turbine. Can be used.

  In addition, a duct outlet turning mechanism for turning the outlet part of the exhaust duct to the leeward side of the natural wind when viewed from the impeller part about the rotation axis of the impeller part may be provided. Since the impeller part of the vertical wind turbine originally has a part that is not driven by natural wind, by introducing exhaust gas wind into this part, the vertical wind turbine drive by natural wind is not hindered by the exhaust gas wind. A vertical windmill can be driven. More specifically, in the vertical wind turbine, in the swirl region of the impeller, the swirl direction of the impeller portion rotated by natural wind is approximately the same as the natural wind direction (hereinafter referred to as the same direction impeller swivel region). ) Mainly generates torque for turning the impeller. This means that in the swirl region of the vertical wind turbine, the swirl direction of the impeller rotated by natural wind is approximately half the direction of the natural wind (reverse impeller swirl region). If the exhaust gas wind is introduced in the direction opposite to the wind direction, the direction of the exhaust gas wind and the direction of rotation of the impeller coincide with each other, which means that the exhaust gas wind and the natural wind can be used with high efficiency.

  Further, a guide duct may be provided for guiding the exhaust gas discharged from the impeller portion to the windward side of the natural wind to the leeward side of the natural wind. If it does in this way, the ejector effect of the natural wind which acts on the exit side of this guide duct can also be utilized. That is, in order to prevent the exhaust gas wind that has flowed out from the impeller portion to the upstream side of the natural wind from being compressed in the opposite direction by the natural wind, An exhaust gas wind guide mechanism that changes the direction by 90 degrees and exhausts it toward the natural wind may be provided.

  Preferred embodiments of the present invention will be specifically described below with reference to the drawings. However, the present invention is not limited to this embodiment, and it goes without saying that the present invention may be implemented using other known components.

(Embodiment 1)
A hybrid wind power generator according to Embodiment 1 will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic side view thereof, and FIG. 2 is a schematic plan view of the apparatus.

  Reference numeral 1 denotes an impeller part of a vertical wind turbine type wind power generator, 2 denotes a factory building, and 3 denotes an outlet part of an exhaust duct of an industrial heating furnace (not shown) provided on the roof of the factory building 2.

  The generator part of the wind power generator is stored under the roof surface 4 of the factory building 2 and is not shown in FIG. As shown in FIG. 2, the outlet portion 3 of the exhaust duct is arranged to blow exhaust gas wind on the outer peripheral portion of the vertical impeller portion 1, whereby the impeller portion 1 has its rotating shaft 5. Rotates as the center. Natural wind also rotates the vertical windmill. What is important is that, even though the outlet 3 of the exhaust duct is disposed close to the impeller 1, the natural wind can rotate the impeller 1 even if the wind direction of the natural wind changes. is there.

  For example, consider a case where the natural wind has a wind direction A. Natural wind accelerated by the outlet 3 of the exhaust duct is introduced into the forward impeller swirl region 7 occupying half of the circular impeller swirl region 6 of the impeller unit 1 as viewed from above. become. That is, the outlet portion 3 of the exhaust duct introduces this accelerated wind mainly only in the forward impeller turning region 7 together with the effect of increasing the natural wind introduced into the impeller portion 1 and reverses this accelerated wind. This has the effect of not being introduced into the direction impeller turning region 8. In the natural wind direction B, the above-described effect is more remarkable. The natural wind is prevented from flowing into the reverse impeller turning region 8 and the normal impeller natural wind is guided to the turning region 7. In the natural wind directions C and D, the outlet 3 of the exhaust duct is not located on the upstream side of the impeller 1, so the above effect can hardly be expected, but the outlet 3 of the exhaust duct is a natural wind impeller. It does not inhibit the introduction to 1.

(Embodiment 2)
The hybrid type wind power generator of Embodiment 2 is demonstrated with reference to FIG. 3, FIG. FIG. 3 is a schematic side view thereof, and FIG. 4 is a schematic plan view of the device.

  In this embodiment, in the embodiment shown in FIG. 1, the outlet portion 3 of the exhaust duct protrudes upward from the roof surface 4 of the factory building 2, and the exhaust gas wind rises in the exhaust duct, The direction is changed in the horizontal direction by the guide vanes 9 for changing the wind direction provided in the outlet portion 3 of the exhaust duct and introduced into the outer peripheral portion of the impeller portion 1 of the vertical wind turbine. In this embodiment, the front end of the outlet portion 3 of the exhaust duct is curved along the outer peripheral surface of the impeller portion 1, whereby the gap between the outlet portion 3 of the exhaust duct and the impeller portion 1 is curved. The distance is reduced to suppress the speed reduction of the exhaust gas wind.

(Embodiment 3)
A hybrid wind power generator according to Embodiment 3 will be described with reference to FIGS. 5 and 6. FIG. 5 is a schematic side view thereof, and FIG. 6 is a schematic plan view of the device.

  In this embodiment, in the embodiment shown in FIG. 1, a pair of outlet portions 31 and 32 of the exhaust duct are provided at rotationally symmetric positions (180-degree rotationally symmetric positions) around the rotation shaft 5 of the impeller 1. The outlet portions 3 of the two exhaust ducts discharge the exhaust gas wind toward the impeller portion 1, respectively. If it does in this way, the rotational torque balance which arises in the impeller part 1 can be improved, and durability of the lubrication part of the impeller part 1 can be improved. Furthermore, it will be understood that the natural wind acceleration effect by the outlet 3 of the exhaust duct described above can be further improved. In addition, it is also possible to arrange a large number of outlet portions, and in this case as well, it is preferable to arrange them in a rotationally symmetrical manner.

(Embodiment 4)
A hybrid wind power generator according to Embodiment 4 will be described with reference to FIGS. FIG. 7 is a schematic side view thereof, and FIG. 8 is a schematic plan view of the device.

  This embodiment is different from the embodiment shown in FIGS. 5 and 6 in that the outlet portions 31 and 32 of the exhaust duct are provided at a rotationally symmetric position (180 degree rotationally symmetric position) around the rotational axis 5 of the impeller 1. In addition, these outlet portions 31 and 32 are arranged in a line-symmetrical position with the rotation axis 5 as the center line, and exhaust gas wind is blown out in the same direction. However, the exhaust gas wind is blown into the outer peripheral portion of the impeller portion 1. In this way, the rotational torque balance can be improved. In addition, illustration of the exit part 31 is abbreviate | omitted in FIG.

(Embodiment 5)
A hybrid wind power generator according to Embodiment 5 will be described with reference to FIGS. FIG. 9 is a schematic side view thereof, and FIG. 10 is a schematic plan view of the apparatus.
In this embodiment, in the embodiment shown in FIGS. 1 and 2, instead of providing the outlet portion 3 of the exhaust duct so as to blow the exhaust gas wind around the outer peripheral portion of the impeller portion 1, the exhaust gas wind is supplied to the impeller portion 1. The outlet portion 3 is arranged so as to blow out in the vicinity of the rotary shaft 5, that is, in the central portion in the left-right direction in FIG. 10. If it does in this way, as shown in FIG. 11, since an exhaust-gas wind can be flowed along the wing | blade part of the rotation position which can make torque most among each wing | blade part of the impeller part 1, torque is improved. Can do. In FIG. 11, a ring-shaped region surrounded by double concentric circles is a region where the wings of the impeller unit 1 rotate, and inside the inner circle, a support unit that mechanically supports these wings rotates. It is an area. In FIG. 11, F1 and F2 are forces generated in the wing portion 10 of the impeller portion 1, and T1 and T2 are torque components of the forces F1 and F2. It should be noted that the shape of the wing portion 10 in FIG. 11 is an example, and can be changed as appropriate, and naturally the lift force and drag force are changed by changing the airfoil shape.

(Modification)
In addition, in the said embodiment, although the impeller part 1 was arrange | positioned on the factory building 2, you may arrange | position to the side of the factory building 2 if it separates from the outer wall of the factory building 2 by the predetermined distance.

It is a model side view which shows Embodiment 1 of the hybrid type wind power generator of this invention. 1 is a schematic plan view showing Embodiment 1 of a hybrid wind power generator of the present invention. It is a model side view which shows Embodiment 2 of the hybrid type wind power generator of this invention. It is a schematic plan view which shows Embodiment 2 of the hybrid type wind power generator of this invention. It is a model side view which shows Embodiment 3 of the hybrid type wind power generator of this invention. It is a schematic plan view which shows Embodiment 3 of the hybrid type wind power generator of this invention. It is a schematic side view which shows Embodiment 4 of the hybrid type wind power generator of this invention. It is a schematic plan view which shows Embodiment 4 of the hybrid type wind power generator of this invention. It is a model side view which shows Embodiment 5 of the hybrid type wind power generator of this invention. It is a schematic plan view which shows Embodiment 5 of the hybrid type wind power generator of this invention. It is explanatory drawing which shows the torque generation state in the wing | blade part which produces the largest torque among the impeller parts in Embodiment 5. FIG.

Explanation of symbols

1 Vertical windmill-type wind turbine impeller part 2 Factory building 3 Exhaust duct outlet part 4 Factory building roof surface 5 Impeller part rotating shaft 6 Impeller part impeller swirl area 7 Semi-circular forward Impeller swirl region 8 Semi-circular reverse impeller swirl region 9 Wind vane changing guide vanes 31 and 32 Exhaust duct outlet

Claims (7)

An exhaust duct for guiding exhaust air or exhaust gas to the outside of the building;
The exhaust gas having an impeller portion and a generator portion connected to the impeller portion is disposed at a predetermined interval at an outlet portion of the exhaust duct and is exhausted to the outside air from the outlet portion. A wind power generator that is driven to generate electricity;
With
The wind power generator
A hybrid wind power generator, which is arranged at a position where it can be driven by natural wind and generates power by both natural wind and exhaust gas wind. The hybrid wind turbine generator according to claim 1,
The impeller part of the wind power generator is
A hybrid wind power generator characterized by comprising a vertical wind turbine. The hybrid wind power generator according to claim 2,
The outlet of the exhaust duct is
A hybrid type wind power generator, which is set at a position where the exhaust gas wind is introduced in the same direction as the turning direction of the vertical windmill. In the hybrid type wind power generator according to claim 3,
The outlet of the exhaust duct is
The hybrid wind power generator characterized in that the exhaust gas wind is blown out more concentratedly on the outer peripheral portion of the impeller portion of the vertical wind turbine than in the radial center portion of the impeller portion. In the hybrid type wind power generator according to claim 3,
The outlet of the exhaust duct is
A hybrid wind turbine generator, wherein a plurality of the rotary wind turbines are arranged at substantially rotational positions around a rotation axis of the vertical wind turbine, and each of the outlet portions blows out the exhaust gas wind in a rotation direction of the vertical wind turbine. The hybrid wind power generator according to claim 2,
The outlet of the exhaust duct is
At least two of the two vertical outlets are arranged at substantially line symmetrical positions around the rotation axis of the vertical wind turbine, and one of the two outlets blows the exhaust gas wind in the rotational direction of the vertical wind turbine, and the two outlets The hybrid wind power generator is characterized in that the exhaust gas is blown out in the direction opposite to the rotation direction of the vertical wind turbine at the other of the parts. The hybrid wind power generator according to claim 2,
The outlet of the exhaust duct is
The hybrid wind power generator characterized in that the exhaust gas wind is blown out more concentratedly than the outer peripheral portion of the impeller portion toward the radial center of the impeller portion of the vertical windmill.

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