JP2012163030A - Wind power generating device using continuity equation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wind power generating device which has no adverse effects on aerodynamic performance of moving bodies such as a motor vehicle, an electric train, and the like, is not affected by external contributing factors such as a flying object, rain water, and the like, and is able to control a flow rate of an air current with respect to the power generating device due to speed change of a moving object.SOLUTION: The device applies a continuity equation held for flow rates of a relative air current produced at traveling of a moving body and an air current sucked from a flowout part of the device, and guides an air current for performing wind power electricity generation into the device to generate electricity. As a structure is employed where an external air current is not directly introduced but is sucked, the air dynamic performance of a moving object is not adversely affected, and the structure is unsusceptible to external contributing factors such as a flying object, rain water, and the like. Further, flow speed at an electricity generating part can be controlled by a cross section area of the flowout part and the cross section area of the electricity generating part, and thus by providing a structure capable of controlling the cross section area of the flowout part, an arbitrary flow speed can be obtained correspondingly to the speed of the moving body, and one kind of generator can accommodate a wide range of speeds of the moving object.

Description

The present invention relates to a wind turbine generator that is installed in an automobile / train and uses a flow of airflow generated by a continuous equation for an airflow generated by the movement of the automobile / train.

(B) A wind turbine generator that uses a propeller as a vehicle-mounted generator.
(B) A wind power generator that drives the power generator by taking air current from the front of the car / train, although the power generator is installed in the car.
Etc.

Patent Publication 2003-74456 Patent Publication 2010-31739 Patent Publication 2003-299207

In the conventional technology (A), the area that receives the wind of the part attached to the outside of the vehicle body is large, and the power generation device is exposed to the outside, so the aerodynamic characteristics are completely ignored, and against flying objects etc. The response is bad and the response to rainwater is also bad.
In the prior art (b), since the gas flow from the front of the car / train in the traveling direction is taken into the driving part of the power generation device, the aerodynamic characteristics are greatly affected. Also, if the air inlet is made small or low to improve the aerodynamic characteristics, the inflow amount is limited, and if it is made large, the aerodynamic characteristics are deteriorated, and the flow rate at high speed operation may become too large. Like (I), the response to flying objects etc. is bad.

As shown in FIG. 3, the present apparatus includes an airflow inflow portion, a power generation portion, a cavity portion, and an airflow outflow portion. Among these, the airflow inflow portion is not a structure that takes in a direct airflow from the outside, but may have any structure as long as the airflow generated in the apparatus can be sufficiently supplied. The power generation unit includes a generator and a propeller portion that rotates the generator. A cavity part is a cavity which connects an electric power generation part and an airflow outflow part. The airflow outflow portion is a portion through which the airflow in the apparatus flows out to the outside, and can have a structure capable of controlling the cross-sectional area of the outflow portion.
In FIG. 2, when the relative airflow Q generated when the automobile / train is traveling at the speed V is used, the airflow Qb sucked out from the airflow outflow portion of the present apparatus is generated by the continuous equation. Since this Qb can generate an air flow Qa around the propeller of the power generation unit and rotate the propeller, power generation can be performed.
As mentioned above, the airflow inflow section is not structured to take in direct airflow from the outside, so it does not adversely affect the aerodynamic performance of automobiles and trains, and is not easily affected by external factors such as flying objects and rainwater Can be.
Further, from the equation of continuity, the airflow Qb sucked out from the airflow outflow portion of the present apparatus has the same flow rate as the relative airflow Q generated when the automobile / train is running if the airflow Qa of the power generation unit is sufficient. . The flow velocity Va of the power generation section can be controlled by the airflow Qb (= Q) of the airflow outflow section, the cross-sectional area of the airflow outflow section, and the cross-sectional area of the propeller portion of the power generation section. In other words, Qb (= Q) is determined by the speed V when the car / train is running, and assuming that the cross-sectional area of the propeller part of the power generation unit is constant, if the vehicle has a structure that can control the cross-sectional area of the airflow outflow part, -Arbitrary Va can be obtained by the speed of the train and the cross-sectional area of the controlled airflow outlet.
As a result, it is possible to obtain a larger Qb than the relative air flow Q generated when the car / train is traveling at low speeds, and a smaller Qb than Q when the car / train is driven at a high speed. It shows that it can be obtained. In addition, by providing a mechanism that controls the area of the airflow outflow part, even a train with a large speed range, such as the Shinkansen, can be used with a generator with a relatively narrow range, and automobiles that often run at low speeds Etc., it is possible to have a mechanism for generating electricity with a flow rate larger than the relative airflow obtained by the speed.
Air is a compressible fluid, but if the wind speed is up to about 100 meters / second (360 kilometers / hour), the dynamic pressure is low and can be ignored, and can be treated as an incompressible fluid. Therefore, it is possible to apply a continuous equation.

(A) Since there is no structure such as a wind inlet in the forward direction, the influence on the aerodynamic performance of automobiles and trains can be minimized.
(B) Since there is no structure such as a wind intake in front of the traveling direction, the influence of external factors such as flying objects and rainwater can be minimized.
(C) By changing the size of the airflow suction port, the flow rate of the drive part of the power generation device can be controlled, so that it is possible to generate power with maximum efficiency against changes in the speed of automobiles and trains.
(2) Even a train with a large speed range such as the Shinkansen can be used with a generator with a relatively narrow range.
(E) Since the airflow generated around the vehicle body by driving a car or train is used, it is possible to secure a power generation amount that is not affected by the weather. In particular, in the case of trains, the planned power generation can be secured according to the operation diagram.

In the continuity equation, the flow rates at points a and b are the same. If the flow velocity at point a is Va and the flow velocity at point b is Vb, the relationship between Va and Vb is inversely proportional to the area ratio of point a and the area of point b. Therefore, when the flow rate at point b is constant, the flow velocity at point a can be controlled by the area at point b. When the fluid is considered to be air, as described above, air is a compressible fluid, but it can be handled as an incompressible fluid below a certain flow rate, and therefore the present invention is applied to trains, automobiles, etc. Things are possible. Assuming that the flow rate of the relative air flow generated when the train or car is running is Q, if there is a sufficient flow rate Qa on the inlet side of the power generator installed at the point A, the flow rate Qb at the outlet B point is external. It becomes the same as the flow rate Q. Therefore, the flow rate Qa for driving the power generator installed at the point A can be calculated and controlled by the area ratio with respect to the external flow rate Q based on the area of the outlet at the point B and the cross-sectional area of the power generator installed at the point A. I can do things. In this device, it is necessary to secure the flow rate Qa at point A, but it does not adversely affect the aerodynamic performance of trains and cars, and is not affected by external factors such as flying objects and rainwater. It is necessary to make it a simple shape. In FIG. 2, the cross-sectional area of the power generator installed at the point A is constant, and the area of the outlet at the point B may be controlled in order to control the Qa. As an actual application example, a power generation device is installed in the C section, and a device such as a propeller for driving the power generation apparatus is installed in the D section. For example, a flapper function or the like is installed in the E portion serving as the outflow port so that the area can be controlled. In a train, a plurality of power generators shown in FIG. 3 are arranged in a vertical / horizontal direction so as not to be affected by the airflow from the respective outlets. Is also possible. However, on a train, it is necessary to consider the arrangement for traveling in both directions. In an automobile, it is possible to install several power generators shown in FIG. 3 in one vehicle by arranging a plurality of power generators parallel to the traveling direction. In the case of a bus or a transport vehicle, it can be arranged as in the case of the above-mentioned train, and it is not necessary to consider the direction of travel, so that a large amount of energy can be obtained. When adapting to electric vehicles, etc., there is a margin compared to the engine part compared to conventional cars, so placing this device in the front part does not change the vehicle height and does not compress the indoor space It is possible to install.

(B) Installed outdoors on trains for planned power generation and used as electric energy for driving / air conditioning, etc. (b) Installed in electric vehicles / hybrid vehicles and used as electric energy (c) Cold storage Installed in a car and used as electric energy for cold storage (2) Stored in a battery, etc., when sold (from a gas station or home)

None

Currently, the development of small generators for wind power generation is also progressing, and it is a technology that can be used immediately in trains, large cars / buses, and the like. In addition, this technology can be used sufficiently even in small / medium-sized automobiles by devising the arrangement method of this apparatus and developing a further small generator. In the automobile / bus, even when it is necessary to store the generated energy when it is not electric power itself, the battery technology is improved at present when the electric vehicle is put into practical use, and there is no problem in dealing with it. Devices that sell the stored electricity to an electric power company at home or the like should have no problem if a technique such as solar power generation on the roof of the house is applied.

FIG. 1 a: Arbitrary sectional position a
Fig. 1 Va: Flow velocity at an arbitrary cross-sectional position a 1 b: Arbitrary cross-sectional position b
Fig. 1 Vb: Flow velocity at an arbitrary cross-sectional position b 2 Q: Flow rate of relative airflow generated around a train or automobile traveling 2 A: Location where a power generator is installed 2 Qa: Point A Fig. 2 Flow rate near the power generator installed in Fig. 2 B: Outlet from the power generator Fig. 2 Qb: Flow rate at point B 2 V: Traveling speed of trains and cars 3C: Power generator Fig. 3 D: Drive the power generator Fig. 3 E: Outlet

Claims (2)

A wind turbine generator that uses airflow generated according to a continuous equation when running on an automobile or train 2. The wind turbine generator according to claim 1, further comprising a device for controlling the airflow speed of the power generator by controlling the area of the suction port.

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