DE202012002706U1 - Power generating device and power generation arrangement - Google Patents

Abstract

Electricity generating device (1) for introduction into a sewer pipe (2) comprising: - a weir plate (5) which can be moved along a first direction (W), - a rotor (7) which can be moved along a second direction (R) and which is connected to a generator (9 ) is connected, the rotor (7) along the sewage flow direction F - that is downstream - of the weir plate (5) in the sewer pipe (3) is arranged in such a way, and wherein the rotor (7) and the weir plate (5) to reach a Operating position can be moved relative to one another in such a way that the rotor (7) in the operating position can be driven by sewage which flows in the operating position over or under the weir plate (5) and electrical current can be generated by means of the generator (9).

Description

The invention relates to a power generation device for sewage pipelines, as well as a power generation arrangement.

The power generation from wastewater by a power generation device located in a sewage pipeline is known in the art. For example, the document discloses DE 10 2008 004 583 A1 To arrange a turbine wheel in the sewage pipeline to drive a generator. However, with this arrangement, it is necessary to protect the turbine wheel from the cargo entrained in the sewage to prevent the turbine wheel from becoming blocked. For this purpose, for example, as disclosed in the document DE 10 2008 004 583 A1, screens may be provided, which sift the cargo out of the wastewater in front of the turbine wheel and added via a bypass line downstream of the turbine wheel as the wastewater. In this case, the formation of the bypass line causes considerable additional costs, especially since the existing sewage pipeline must be supplemented by the bypass line.

It is therefore an object of the present invention to provide a power generation apparatus which is easy to manufacture and which requires a reduced installation cost and a corresponding method for generating electric power. This object is solved by the subject matters of the independent claims. Preferred embodiments are subject of the dependent claims.

power generating device

• – eine entlang einer ersten Richtung W verfahrbaren Wehrplatte,
• – einen entlang einer zweiten Richtung R verfahrbaren Rotor, welcher mit einem Generator verbunden ist,

wobei der Rotor entlang der Abwasserfließrichtung F – also stromabwärts – von der Wehrplatte in der Abwasserrohrleitung angeordnet derart ist, und
wobei der Rotor und die Wehrplatte zum Erreichen einer Betriebsposition relativ zueinander derart verfahrbar sind, daß der Rotor in der Betriebsposition durch Abwasser, welches in der Betriebsposition über oder unter die Wehrplatte fließt, antreibbar ist und mittels des Generators elektrischer Strom erzeugbar ist.One aspect of the present invention relates to a power generation device for introduction into a sewage pipeline comprising:

• A weir plate movable along a first direction W,
• A rotor movable along a second direction R, which is connected to a generator,

wherein the rotor along the waste water flow direction F - ie downstream - of the weir plate in the sewage pipeline is arranged such, and
wherein the rotor and the weir plate for reaching an operating position relative to each other are movable such that the rotor in the operating position by waste water, which flows in the operating position above or below the weir plate, is drivable and can be generated by the generator electrical power.

Advantageously, the kinetic energy contained in the flowing wastewater can be used to generate electricity. Further advantageously, the effluent amount flowing through the power generating device can be controlled by the weir plate. Further advantageously, the movable weir plate and the movable rotor can be arranged in a compact form within the sewage pipeline, the rotor further advantageously by a surge flushing, which is rammed by a damming of wastewater by means of the weir plate and a sudden release of the dammed sewage and thereby of attached dirt can be exempted. The rotor is further preferably movable out of the effluent in the sewage pipeline wastewater so that sewage can pass through the rotor without contacting the rotor or without driving the rotor. As a result, wastewater with a cargo of solids that might catch on the rotor can pass through the rotor unhindered, for example, when solids sedimented upstream of the weir plate continue to be transported along the sewage flow direction by means of a rinse.

The term wastewater includes in particular rainwater, dirty water and mixed water. Under the sewage pipeline all volumes are understood that hold the wastewater, including in particular the actual sewer pipe, but also the hydraulically associated wastewater engineering structures, such as weirs, chokes, catch basins, screening, lifts, secondary piping, etc. include.

The sewage flows along the sewage flow direction F within the sewage piping, the sewage flow direction F usually following the slope of the sewage piping. In exceptional cases, the wastewater is pumped by means of a pumping system or at least one weir against gravity and against the gradient of the sewage pipeline, so that the waste water flow direction F and thus the direction "downstream" is determined by the conveying direction of the pumping system.

The weir plate is movable along the first direction W, wherein the direction W is preferably oriented substantially perpendicular to the waste water flow direction F. However, the first direction W may also be oriented at an angle of from about 30 degrees to about 90 degrees, preferably from about 45 degrees to about 90 degrees, and more preferably from about 60 degrees to about 90 degrees. In this case, the direction R can correspond to an extension direction of the weir plate, that is to say a height, width or longitudinal extension direction.

The rotor is movable along a second direction R. The second direction R may be identical to or different from the first direction W. Preferably close the first direction W and the second direction R is an angle less than about 45 degrees. More preferably, this angle is less than about 30 degrees, and more preferably less than about 15 degrees.

The rotor is connected to a generator for generating electrical energy, so that the generator is operated when the rotor rotates through the effluent flowing through it. For this purpose, the rotor along the Abwasserfließrichtung F - ie downstream - arranged by the weir plate in the sewage pipeline. So that the waste water is guided over the rotor so that the rotor is the maximum achievable by the predetermined amount of waste water speed and / or the maximum torque is generated, the rotor and the weir plate are movable relative to each other. By the process of the rotor or the weir plate, the amount of sewage driving the rotor or the drop height of the waste water can be determined on the rotor. As a result, the rotational speed of the rotor can be controlled or regulated and thus the amount of electrical energy generated by means of the generator. To drive the rotor rotor blades of the rotor are flown by the wastewater. Preferably, the flow against the rotor blades is tangential, that is substantially perpendicular to the direction of extension of each rotor blade at the time or at the location of the impact of the wastewater on the corresponding rotor blade. In other words, the impact direction of the wastewater on the rotor or each rotor blade are perpendicular to the axis of rotation of the rotor. Advantageously, the tangential flow causes that entrained in the wastewater cargo can not catch on the rotor or on the axis of the rotor, so that thereby the reliability is increased. Additional screening devices, which remove the cargo from the wastewater and entail an increased cleaning effort, are therefore advantageously not necessary.

Preferably, the rotor and the weir plate to achieve a Aufstauposition be moved relative to each other such that wastewater in the Aufstauposition upstream of the weir plate is stowable and the rotor () is not driven by wastewater. In other words, the weir plate can be positioned so that substantially no wastewater passes from upstream of the weir plate to the downstream rotor. The weir plate can thus essentially block the sewage flow through the sewage pipeline. As a result, the wastewater accumulated in an area upstream of the weir plate and is thus advantageously available at a later time for the production of electric power. In particular, the position of the weir plate may be controlled such that the weir plate inhibits the flow of sewage through the sewage pipeline when an electrical consumer connected to the generator does not require electrical power from the generator. The sewage pipeline can therefore serve as a reservoir for waste water, which is used at a later time for generating electrical energy when the consumer connected to the generator requires electrical energy. For example, the power generating device described above may be installed in an urban sewage piping network. Then the weir plate can be moved to the stowage position and the waste water collected overnight if the local power consumption and the amount of wastewater is minimal. In the morning, as local power consumption in the urban area increases, the weir plate and rotor can be moved to the operating position, and the wastewater collected can be used to generate electricity to at least partially meet local electricity needs. At the same time in the morning, the accumulating wastewater volume, so that more electricity can be generated.

The power generating device preferably comprises a control unit, wherein the control unit is designed to move the rotor and the weir plate between the stowing position and the operating position in dependence on the amount of water accumulated by the weir plate and / or depending on the required electrical power.

Preferably, the generator is designed as a hub generator. It is understood, however, that any arbitrarily designed generator may be mechanically connected in a suitable manner to the rotor in order to transmit the rotational movement of the rotor to the generator.

power generation arrangement

• – eine erste erfindungsgemäße Stromerzeugungsvorrichtung,
• – eine zweite erfindungsgemäße Stromerzeugungsvorrichtung,

wobei die zweite Stromerzeugungsvorrichtung entlang der Abwasserfließrichtung F – also stromabwärts – in der Abwasserrohrleitung angeordnet und von der ersten Stromerzeugungsvorrichtung beabstandet ist.One aspect relates to a power generation arrangement for introduction into a sewage pipeline comprising:

• A first power generation device according to the invention,
• A second power generation device according to the invention,

wherein the second power generating device along the Abwasserfließrichtung F - ie downstream - disposed in the sewage pipeline and is spaced from the first power generating device.

The first power generation device is spaced from the second power generation device in the sewage pipeline. The waste water flows along the waste water flow direction F from the first power generation apparatus to the second power generation apparatus, and the waste water flow direction F is usually the same Gradient of the sewage pipeline follows. In other words, the second power generation device is located lower in relation to the sea level than the first power generation device, and the second power generation device is located downstream of the first power generation device. In exceptional cases, the wastewater is required by means of a pumping system or at least one weir against gravity and against the gradient of the sewage pipeline, so that the waste water flow direction F and thus the direction "downstream" is determined by the conveying direction of the pumping system.

Advantageously, such a power generation arrangement can be used both for wastewater management within the sewage pipeline and for power generation.

• – eine zweite Abwasserrohrleitung, welche mit der Abwasserrohrleitung hydraulisch verbindbar ist,
• – zumindest eine dritte erfindungsgemäße Stromerzeugungsvorrichtung, wobei die Abwasserfließmenge durch die Abwasserrohrleitung und die zweite Abwasserrohrleitung steuerbar oder regelbar ist.

Preferably, the power generation arrangement further comprises:

• A second sewage pipeline, which is hydraulically connectable to the sewage pipeline,
• - At least a third power generating device according to the invention, wherein the wastewater flow rate through the sewage pipeline and the second sewage pipeline is controllable or regulated.

Advantageously, the weir plates of the power generation devices can be used to control the wastewater flow rate in the first and second sewer pipelines. Therefore, the wastewater flow rate can be adapted to the accumulated amount of waste water and / or to the demand of waste water for power generation, for example, after rain events.

It should be understood that the power generating arrangement may also include a third sewage pipeline having a fourth power generation device, a fourth sewage pipeline having a fifth power generation device, etc., the third and fourth sewage piping being hydraulically connectable to the sewage piping, respectively. Thus, advantageously, a plurality of power generation devices according to the invention can be treated with waste water to generate electrical energy.

That the second sewage pipeline with the sewage pipeline is hydraulically connected, means that the hydraulic connection can be interrupted at least temporarily, if necessary, however, can be produced. In particular, the hydraulic connection between the sewage pipeline and the second sewage pipeline may be dependent on the amount of sewage present in the sewage pipelines.

• – zumindest eine Sperrvorrichtung, welche aus Richtung der ersten Stromerzeugungsvorrichtung kommendes Abwasser zu vorbestimmbaren Anteilen zu der zweiten Stromerzeugungsvorrichtung und zu der dritten Stromerzeugungsvorrichtung fließen lassen kann.

Preferably, the power generation arrangement further comprises:

• - At least one blocking device which can flow from the direction of the first power generating device waste water to predeterminable proportions to the second power generating device and to the third power generating device.

Advantageously, by the barrier device, such as a weir plate, the wastewater flow amount flowing to the individual power generation devices can be controlled to determine the amount of generated or generated electrical energy.

In other words, the at least one blocking device can control the hydraulic connection between the sewage pipeline and the second sewage pipeline. In this case, the at least one blocking device may be formed in or on the sewage pipeline or be formed in or on the second sewage pipeline. In particular, the at least one blocking device may comprise a weir or a slide which is designed to control the amount of sewage flowing through the sewage pipeline in the direction of the second power generation device. The hydraulic connection between the sewage pipeline and the second sewage pipeline may be arranged upstream of the at least one barrier device, so that wastewater from the sewage pipeline flows into the second sewage pipeline when the at least one barrier device in the sewage pipeline is closed. In particular, the closing of the at least one blocking device in the sewage pipeline may cause the sewage from the sewage pipeline to rise in the direction opposite to the gradient in the second sewage pipeline in the direction of the third power-generating device. Preferably, the first power generating device is disposed higher in the sewage piping than the third power generating device in the second sewage piping so that the sewage flows from the first power generating device along the sewage flowing direction F through the sewage piping to the at least one blocking device and then counter to the fall in the second Sewer pipe to the third power generating device flows. If the weir plate of the third power generating device is open, the wastewater can continue to flow into the wastewater pipeline lying behind the weir plate. The rotor of the third power generating device can contact the waste water and thereby rotate or the rotor is moved such that it does not contact the wastewater. Is a predetermined amount of waste water in the Wastewater pipeline, so the weir plate of the third power generating device can be closed to stow the waste water in the sewage pipeline or to save it, regardless of the state of the locking device. At a later time, the third power generating device can be transferred to the operating position to generate electrical energy with the help of the dammed up wastewater.

• – eine erste Meßvorrichtung, welche den Pegel H₁ an der Wehrplatte der ersten Stromerzeugungsvorrichtung und/oder
• – eine zweite Meßvorrichtung, welche den Pegel H₂ an der Wehrplatte der zweiten Stromerzeugungsvorrichtung und/oder
• – eine dritte Meßvorrichtung, welche den Pegel H₃ an der Wehrplatte der dritten Stromerzeugungsvorrichtung erfaßt.

Preferably, the power generation arrangement comprises

• A first measuring device, which has the level H ₁ at the weir plate of the first power generating device and / or
• A second measuring device, which has the level H ₂ at the weir plate of the second power generating device and / or
• - A third measuring device which detects the level H ₃ at the weir plate of the third power generating device.

The detection of the levels H ₁ , H ₂ , H ₃ may in particular comprise the measurement of the corresponding level or wastewater level in the sewage pipeline by means of ultrasound or by means of water pressure measurement. Further preferably, the first measuring device, the second measuring device and / or the third measuring device are connected to a control device, so that the wastewater flow rate over the respective weir plates of the first, second and / or third power generating device based on the controlled by the data or can be regulated. Advantageously, the level (s) on the weir plate (s) may be used as the basis for controlling the flow of sewage through the individual sections of sewage piping. In particular, the level (s) at the weir plate (s) may be utilized to maintain one or more of these levels substantially constant.

power generation process

• – Bereitstellen einer erfindungsgemäßen Stromerzeugungsvorrichtung;
• – Verfahren der Wehrplatte der Stromerzeugungsvorrichtung und
• – Verfahren des Rotors der Stromerzeugungsvorrichtung,

wobei die Stromerzeugungsvorrichtung in die Betriebsposition überführt wird, wobei der Rotor in der Betriebsposition durch Abwasser, welches in der Betriebsposition über oder unter die Wehrplatte fließt, angetrieben wird und mittels des Generators elektrischer Strom erzeugt wird.An exemplary method of generating electrical current includes the following steps:

• - Providing a power generating device according to the invention;
• - Procedure of the weir plate of the power generating device and
• Method of the rotor of the power generating device,

wherein the power generating device is transferred to the operating position, wherein the rotor is driven in the operating position by waste water, which flows in the operating position above or below the weir plate, and is generated by means of the generator electrical current.

figure description

Hereinafter, a preferred embodiment of the present invention will be described by way of example with reference to the accompanying drawings. It shows:

1 a perspective view of an embodiment of the power generating device;

2 : a top view of the in 1 embodiment shown;

3 : a first sectional view of the in 1 embodiment shown;

4 : a second sectional view of the in 1 shown embodiment.

The 1 to 4 show a preferred embodiment of a power generating device 1 in a sewage pipeline 3 , It shows the 1 a perspective view and 2 a plan view of the embodiment. The Indian 2 marked section AA 'along the waste water flow direction F is in 3 shown. The Indian 2 marked section BB 'transverse to the waste water flow direction F is in 4 shown. The sewage pipeline 3 comprises in the embodiment shown a wastewater engineering structure, which includes the necessary components of the power generating device 1 receives.

The power generation device 1 includes a weir plate 5 which is movable along a first direction W. The first direction W can therefore also be referred to as a weir plate movement direction. further comprises the power generating device 1 a rotor 7 which is movable along a second direction R. The second direction R can therefore also be referred to as the rotor travel direction. The rotor 7 is with a generator 9 connected so that by turning the rotor 7 the generator is powered and generates electricity.

The rotor 7 is along a Abwasserfließrichtung F, that is, downstream, from the weir plate 5 in the sewage pipeline 3 arranged such that the rotor 7 in an operating position by wastewater 11 that over a top edge 5a the weir plate 5 flows, is driven, causing the rotor 7 and thus the generator 9 are driven and electrical power is generated. The through the generator 9 generated electrical power can by means of the rotor 7 flowing wastewater to be controlled. The amount of wastewater 11 , Which over the rotor 7 flows depends on the height of the wastewater level 11a and the top edge 5a the weir plate.

In other words, the weir plate 5 be shifted so that the distance between the sewage level 11a and the top edge 5a the weir plate 5 is controlled or regulated at a predetermined, in particular constant value. Further, the rotor can be displaced along or against the first direction R, so that during operation of the generator 9 the top edge 5a the weir plate 5 a substantially constant distance along the first direction R to the axis 7a the rotor 7 having. In other words, the distance varies in the operating position or during the operation of the generator 9 preferably less than about 10 cm, more preferably less than about 5 cm, and most preferably less than about 1 cm.

It is understood that the generator 9 via at least two electrical connections 9a . 9b has the electricity generated by a consumer inside or outside the sewage pipeline 3 to provide. In particular, the generated electric current for operation of the weir plate 5 be used. Since weir plates, among other things, to regulate the water balance in the sewage pipeline 3 be used, for example, to perform surge water flushing or for protection against backwater, can by means of the power generation device 1 a self-sufficient device for regulating the flow of sewage is provided in a simple manner, which is not dependent on an external power supply, since the necessary for the operation of the weir plate current through the power generating device 1 itself is generated. It is understood that by means of the generated stream and more weir plates can be operated.

To reach the in the 1 to 4 shown operating position are the rotor 7 and the weir plate 5 movable relative to each other. This can be the weir plate 5 along or against the first direction W and / or the rotor 7 along or against the second direction R are moved. The process of the weir plate 5 or the rotor 7 can by means of suitable drives 13 . 15 respectively. For example, the weir plate 5 by means of a weir plate drive 13 be moved or moved, which can be designed as a spindle drive, as a hydraulic drive, as a linear motor and / or as a pneumatic drive. In this case, the weir plate can be transferred by the method or the displacement along the first direction W from an open position to a closed position. In the open position, the weir plate 5 at least partially in one to the sewer pipe 3 adjacent recess 17 be arranged.

Preference is given to the weir plate 5 in associated guides or guide grooves 19a . 19b guided, wherein the guides in particular such in the sewage pipeline 3 are arranged, that the cross section of the sewage pipeline 3 in the area of the weir plate 5 through the guides 19a . 19b not reduced. Particularly preferred, the weir plate 5 completely in the recess 17 be displaced or moved, whereby the cross section in the area of the weir plate is maximum and approximately the cross section of the remaining sewage pipeline 3 equivalent.

The rotor 7 can in a similar manner by means of a rotor drive 15 be moved or moved, which can be designed as a spindle drive, as a hydraulic drive, as a linear motor and / or as a pneumatic drive. Next according to the rotor 7 around an axis 7a rotatable on two brackets 7b . 7c be stored, with the brackets 7b . 7c relocatable in associated guides 21a . 21b are arranged. The displacement is preferably carried out hydraulically or pneumatically, wherein in each case a hydraulic cylinder 15a or a pneumatic cylinder 15a with one of the brackets 7b . 7c is connected so that the brackets 7b . 7c by means of the actuation of the cylinders 15a are displaced, in particular linearly displaceable or displaceable. As in 4 the axis can be shown 7a be designed as two stub axles. Alternatively, the axis 7a be formed continuously. This can be the storage of the axle 7a in the holders 7b . 7c rotatable or rigid. In the in 4 As shown embodiment, a rigid connection of the axis 7a with the brackets 7b . 7c , where storage is via two generators 9 he follows. The rotor 7 is then in each case by means of a bearing, for example a rolling bearing or ball bearing 9c connected to the stub axle. Connected generators. By a rotation of the rotor 7 becomes the assigned generator 9 then at least partially driven.

The rotor 7 has at least one rotor blade 7d , but preferably two, three, four or more rotor blades 7d on. Every rotor blade 7d extends substantially radially to the axis 7a that is, substantially along one of the axis 7a outgoing radius vector. To drive the rotor 7 become the rotor blades 7d from the sewage 11 incident flow. Preferably, the flow of the rotor blades occurs 7d tangential, that is substantially perpendicular to the direction of extension of the rotor blade 7d at the time or place of impact of the wastewater on the corresponding rotor blade 7d ,

The guides 21a . 21b are preferably in the sewage pipeline 3 arranged that the Cross section of the sewage pipeline 3 in the area of the rotor 7 not through the guides 21a . 21b is reduced. Particularly preferred, the rotor can 7 completely in a recess (not shown) to be displaced or moved, whereby the cross section in the region of the rotor 7 is maximum and approximately the cross section of the remaining sewage pipeline 3 equivalent.

The generator 9 can preferably be designed as a hub generator. It is understood, however, that any arbitrarily trained generator in a suitable manner with the rotor 7 may be mechanically connected to the rotational movement of the rotor 7 to transmit to the generator. In the version as a hub generator, the generator 9 having a bobbin which during operation of the generator 9 around the common axis 7a of the rotor 7 and the generator 9 rotates, whereby electric current is generated by induction in the bobbin.

LIST OF REFERENCE NUMBERS

1

power generating device

3

Sewage pipeline

5

weir plate

5a

top edge 5a the weir plate 5

7

rotor

7a

axis

7b, c

brackets

9

generator

9a, b

electrical connections

11

sewage

13

Wehr disk drive

15

rotor drive

15a

Hydraulic cylinder or pneumatic cylinder

17

Recess in the sewage pipeline 3

19a, b

Guide grooves in the sewage pipeline 3

21a, b

guides

F

Wastewater flow direction

R

second direction, rotor travel direction

W

first direction, weir plate travel direction

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102008004583 A1 [0002]

Claims (9)

Power generating device ( 1 ) for introduction into a sewage pipeline ( 2 ) comprising: - a weir plate movable along a first direction (W) ( 5 ), - a rotor movable along a second direction (R) ( 7 ), which with a generator ( 9 ), wherein the rotor ( 7 ) along the waste water flow direction F - ie downstream - from the weir plate ( 5 ) in the sewage pipeline ( 3 ) is arranged such, and wherein the rotor ( 7 ) and the weir plate ( 5 ) are movable relative to each other for reaching an operating position such that the rotor ( 7 ) in the operating position by waste water, which in the operating position above or below the weir plate ( 5 ) flows, is drivable and by means of the generator ( 9 ) Electric power can be generated. Power generating device ( 1 ) according to claim 1, wherein the rotor ( 7 ) and the weir plate ( 5 ) in order to achieve a Aufstauposition relative to each other are moved so that wastewater in the Aufstauposition upstream of the weir plate ( 5 ) is stowable and the rotor ( 7 ) is not driven by wastewater. Power generating device ( 1 ) according to claim 1 or 2, further comprising: - a control unit (*), wherein the control unit (*) is designed, depending on the through the weir plate ( 5 ) accumulated amount of water and / or depending on the required electrical power the rotor ( 7 ) and the weir plate ( 5 ) between the stowing position and the operating position. Power generating device ( 1 ) according to one of the preceding claims, wherein the first direction (W) and the second direction (R) are at an angle of about 0 degrees to about 45 degrees to each other. Power generating device ( 1 ) according to one of the preceding claims, wherein the generator ( 9 ) is designed as a hub generator. Power generating arrangement for introduction into a sewage pipeline comprising: A first power generating device according to one of claims 1 to 5, A second power generating device according to one of claims 1 to 5, wherein the second power generating device along the Abwasserfließrichtung F - ie downstream - disposed in the sewage pipeline and is spaced from the first power generating device. A power generation arrangement according to claim 6, further comprising: A second sewage pipeline, which is hydraulically connectable to the sewage pipeline, At least one third power generating device according to one of claims 1 to 5, wherein the wastewater flow rate through the sewage pipeline and the second sewage pipeline is controllable or regulated. A power generation arrangement according to claim 7, further comprising: - At least one blocking device which can flow from the direction of the first power generating device waste water to predeterminable proportions to the second power generating device and to the third power generating device. Power generating arrangement according to one of Claims 6 to 8, having a first measuring device which has the level H ₁ at the weir plate of the first power generating device and / or with a second measuring device which has the level H ₂ at the weir plate of the second power generating device and / or with a third measuring device, which detects the level H ₃ at the weir plate of the third power generating device.

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