JPS58140486A - Device for utilizing wind energy - Google Patents

Abstract

PURPOSE:To utilize the wind energy efficiently in the whole of the device by a method wherein the device is equipped with a heat exchanger, increasing the temperature of a medium in accordance with the revolution of a windmill, and a generator, generating an electric power in accordance with the revolution of the windmill. CONSTITUTION:The revolution of the windmill 1 drives an induction generator 3 through a revolving force transmitting means 2 to supply electricity while a part of the electricity is stored in an electricity storing unit 5. On the other hand, the revolution of the windmill drives the heat exchanger 6 utilizing Joule's heat to heat water and supply it into a hot-water supplying line through a heat accumulating unit 7. A control unit 8 is monitoring the revolving number of shafts 23, 24 and the output of electric power from the induction generator 3, to set a clutch 21 on and the clutch 29 off when the revolving number of the windmill 1 is lower than the synchronous speed of the induction generator 3 while the clutch 28 is cut off and the clutch 29 is set on when the revolving number is exceeding the synchronous speed. Further, both of the clutches are set on when the generating power of the generator 3 has arrived at the maximum generating power.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wind energy utilization device, and particularly to a wind energy utilization device that converts wind energy into electrical energy and thermal energy.

In the past, many devices that utilize wind energy have been proposed, and devices used for single purposes such as power generation or heat conversion devices have already been implemented, but generally electric energy and thermal energy are generated at the same time. This is often necessary, and if you try to obtain both at the same time using wind power, you will need to install multiple single-purpose devices.

However, since wind energy is subject to great temporal and seasonal fluctuations, it is more appropriate to use it as a backup for the main energy or for energy saving purposes than as the main energy. Installing several wind energy utilization devices has the disadvantage that it is extremely uneconomical.

Therefore, an object of the present invention is to provide a wind energy utilization device that can economically obtain electrical and thermal energy from wind energy. This method converts wind energy into rotational energy of a windmill, and uses the rotational energy of the windmill as thermal energy converted by a thermal converter and electrical energy converted by a generator. When the amount exceeds a certain amount, this surplus energy is absorbed by the heat converter. Embodiments will be described in detail below with reference to drawings showing embodiments.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 1 is a windmill, 2 is a rotational force transmission means for transmitting the rotational force of the windmill, and shafts 21°, 23, 24, 25,
0 and 3 are induction generators, which are composed of gears 26, 27 and clutches 28, 29.
The output is supplied to a power storage unit 5 composed of a rectifier and batteries, and is also supplied to a power transmission line (not shown). t+, S
is a heat converter, and this heat converter 6 is supplied with a medium such as water from the outside, stirs the water using the rotational force of a windmill, generates Joule heat, converts it into hot water, and then transfers this hot water to a heat storage section 7.
The hot water is supplied to a hot water supply line (not shown) through the hot water supply line. Furthermore, 8t
li control unit, which monitors the rotation speed of the shaft 2 and the output power from the induction generator 3, and performs this control for the first time, that is, when the rotation speed of the wind turbine 1 is less than the synchronous speed of the induction generator 3. Part 8 operates so that clutch 2I is on and clutch 29 is off, and when the rotational speed of shaft 21 exceeds the synchronous speed of induction generator 3, clutch 28 is off and clutch 2g is on. When the rotational speed of the shaft 210 further increases and the induction generator 3 reaches its maximum generating power, the clutches 28 and 29 are both turned on.

The operation of the device configured in this way is as follows. In a weak wind region, the wind turbine 1 is below the synchronous speed of the induction generator 3
The control unit $ controls the clutches 28 and 29 so that the clutch 28 is on and the clutch 2s is off, so the wind turbine 1
The rotational force of is converted into O thermal energy to turn the water in the heat exchanger 6 into hot water, and the heated hot water is sent to the hot water supply twin (not shown) via the heat storage section 1, and the excess hot water is sent to the heat storage section 7. It can be seen stored in.

When the wind speed increases and the wind turbine 1 rotates at a speed higher than the synchronous speed of the induction generator 3, the clutches 28 and 21 are turned so that the control section 8 beam 28 is turned off and the clutch 29 is turned on.
Since 't-control is performed, the rotational force of the wind turbine 10 is converted into electrical energy by the induction generator 3, power is sent to a power transmission line (not shown), and surplus power is stored in the power storage unit 5.

When the wind speed further increases and the wind energy reaches a strong wind region above the maximum power generating capacity of the induction generator 3, the control #41 section 8F
The clutches 28 and 29 are controlled so that both the i-clutches 28 and 29 are turned on. Therefore, the rotational force of the wind turbine 1 is
an energy and heat converter 6 in which an induction generator 3 generates electrical power;
is used both for energy and to generate heat. Therefore, out of the wind energy, wind energy other than the amount necessary to generate the maximum generated power of the induction generator 3 is absorbed by the thermal converter 6.

In this case, if an attempt is made to absorb wind energy up to a strong wind region using only the induction generator 3, a large-capacity induction generator 3 will be required, which will be uneconomical due to poor efficiency in the wind speed region that occurs most frequently. If we try to improve the economy by setting the capacity of the generator 3 appropriately, the wind energy will increase in strong wind areas, and the rotational force of the wind turbine 10 will increase9, which is greater than the amount required to generate the maximum power of the induction generator 3. Therefore, before protecting the induction generator 3, it is necessary to change the pitch of the blades of the wind turbine 1 to prevent the rotational force of the wind turbine 10 from increasing. However, rather than using the induction generator St alone, when combined with the heat converter 6, the entire range of wind energy from the weak wind region to the strong wind region can be used, so the range of use of wind energy can be widened. .

FIG. 2 is a block diagram 69 showing another embodiment of the present invention.
The same symbols are used for the same parts and corresponding parts as in FIG. 1. In the figure, 2 is a rotational force transmission means, in which shafts 21 to 23 are arranged on the same central axis, the rotation of the shaft 21 is always transmitted to the heat converter 6 and the shaft 22, and the clutch 2s is turned on. The rotation of the shaft 22 is transmitted to the shaft 23 only when 09 is a pump that supplies a medium such as water to the heat converter 6, and 1o is a control valve that adjusts the flow rate of hot water output from the heat converter 6. , 11 is a pump that supplies the output nine hot water to a hot water supply line (not shown). 12 is a control unit that controls the rotation speed of the wind turbine 1 from the synchronous generator 3.
Below the synchronous speed of 0, the clutch 28 is turned off and the wind turbine 1
The nine o'clock line clutch 28 is turned on when the rotational speed of the wind turbine becomes equal to or higher than the synchronous speed of the synchronous power generator &30, and the control valve 10 is controlled so that the windmill 10 rotational speed is maintained at the synchronous speed to adjust the amount of hot water.

The operation of the device thus constructed is as follows. In a weak wind region where the rotation of the wind turbine 1 is lower than the synchronous speed of the synchronous generator 30, the control section 12 acts to turn off the clutch 28, so that wind energy is absorbed only by the heat converter 6 and is not converted into heat. The water in the vessel 6 is stirred by the rotation of the wind *1 and becomes hot water, which is sent to a hot water supply line (not shown) via the heat storage section T and the pump 11, and excess hot water is sent to the heat storage section 7.
It can be seen stored in.

When the wind speed increases and the rotation of the wind turbine 1 exceeds the synchronous speed of the synchronous generator 30, the control unit 12 acts to turn on the clutch 28, so the rotation of the wind turbine 1 is transmitted to the synchronous generator 30, and the rotation of the wind turbine 1 is synchronous. Generator 30f1 starts generating electricity. In this case, wind energy is absorbed by both the heat converter 6 and the synchronous generator 30, so by increasing or decreasing the amount of wind energy absorbed by the heat converter 6, the synchronous generator 30
The rotation speed changes. The absorption of wind energy in the heat converter 6 can be controlled by the amount of water passing through the heat converter 6. Therefore, if the control valve 10 is controlled by the control unit 12 according to the rotation speed of the wind turbine 1, the amount of water passing through the heat converter 6 can be controlled, and the rotation speed of the wind turbine 1 can be kept constant. Generator 30 is capable of generating power at a constant frequency. The power generated by the synchronous generator 30 is supplied to a power transmission line (not shown), and the surplus power is stored in the power storage ssK.

That is, when the rotation of the wind turbine 1 is equal to or higher than the synchronous speed of the synchronous generator 30, the heat converter 6 acts as a kind of brake to keep the rotation of the wind turbine 10 constant by controlling the control valve 10. Regarding heat conversion, efficiency can be further improved by combining it with a solar heat collector and raising the temperature of hot water from the solar heat collector.

In the above embodiments, the induction generator and the synchronous generator have been described as the generator, but the invention is not limited thereto, and other generators may be used.

As explained above, since the wind energy utilization device according to the present invention absorbs wind energy using a generator and a heat converter, it is necessary to use an excessively large capacity generator to absorb wind energy in a strong wind area. There is no need to use
In addition, since wind energy can be utilized without waste from a weak wind region to a strong wind region, it has an excellent effect of being able to economically obtain electricity and thermal energy from wind energy.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the first embodiment of the present invention, and FIG.
The figure is a block diagram showing another embodiment. ---Control valve, 12@-
-Control unit, 30...Synchronous generator. Patent applicant Mitsui Engineering & Shipbuilding Co., Ltd. Agent Masaki Yamakawa (and 1 other person)

Claims (2)

[Claims] (1) A windmill, a rotational force transmission means that transmits the rotational force of the windmill, a heat exchanger that increases the temperature of a medium according to the rotational force of the windmill, and generates electric power according to the rotational force of the windmill. 1. A wind energy utilization device comprising: a power generator; (2) A windmill, a rotational force transmission means for transmitting the rotational force of the windmill, a heat exchanger for increasing the temperature of a medium in accordance with the rotational force of the windmill, and a mechanism for maintaining a constant rotational speed of the windmill. A wind energy utilization device comprising: a control unit that controls the flow rate of a medium supplied to the heat converter; and a synchronous generator that generates electric power according to the rotational force of the wind turbine.