JP2024022769A - Circulating hydraulic power generation system - Google Patents

Abstract

To provide a circulating hydraulic power generation system with high versatility and extendability as a facility alternative to a power plant.SOLUTION: A circulating hydraulic power generation system (100) according to the invention comprises a pit (1) for storing water, and a plurality of power generating units (10A, B, ..., P) arranged around the pit and each generating power by using a water drop. Each of the power generating units comprises: a first engine (11) driven with a biofuel; a first pump (12) driven by the first engine to suck water in the pit and discharge it; a first lifting pipe (21) to direct upward the water discharged from the first pump; a downcast pipe (24) causing water directed upward by the first lifting pipe to fall downward; a water turbine (30) rotating by the flow of water falling from the downcast pipe; and a power generator (32) to generate power by the rotation of the water turbine.SELECTED DRAWING: Figure 1

Description

The present invention relates to a circulating hydroelectric power generation system that generates power using the head of water.

As background technology in this technical field, for example, Patent Document 1 describes a plurality of circulation pumps that suck in and discharge water in a storage tank, a plurality of pumping pipes that guide the water discharged from the circulation pumps upward, and a plurality of multiple curved pipes that curve to guide the water from the lift pipes downward; a downcomer pipe that collects the water from the multiple curved pipes and drops it downward; A circulating micro-hydroelectric power generation system is described that includes a throttle tube having a plurality of stages of throttle sections, and a power generation device that generates electricity by the flow of water from the throttle tube.

According to the hydroelectric power generation system described in Patent Document 1, by adding the compression energy of falling water to the falling energy of falling water, it is said that the power generation efficiency can be increased and the amount of power generated can be increased. ing.

JP2016-075256A

Incidentally, in recent years, efforts have been made to contribute to Goal 7 of the Sustainable Development Goals (SDGs) led by the United Nations, "Ensure access to affordable, reliable, sustainable, and modern energy for all." is required. In this regard, the hydroelectric power generation system described in Patent Document 1 is not sufficient as a technology to replace currently operating power plants, and there is room for improvement from the perspective of SDGs.

The present invention has been made in view of these circumstances, and its purpose is to provide a circulating hydroelectric power generation system with high versatility and expandability as an alternative to power plants.

In order to achieve the above object, one aspect of the present invention includes a pit that stores water, and a plurality of power generation devices arranged around the pit, each of which generates power using the head of the water. , each of the plurality of power generation devices includes a first engine driven by biofuel, a first pump driven by the first engine that sucks and discharges water from the pit, and a first pump that sucks water from the pit and discharges water from the first pump. a first pumping pipe that guides the water upwardly, a downcomer pipe that causes the water guided upwardly by the first pumping pipe to drop downward; a water wheel that is rotated by the flow of water falling from the downhill pipe; This is a circulating hydroelectric power generation system characterized by comprising a generator that generates electricity by rotating a water wheel.

Further, in order to achieve the above object, another aspect of the present invention includes a pit that stores water, and a plurality of power generation devices arranged around the pit, each of which generates power using the head of the water. , a solar panel that generates electricity using sunlight, and each of the plurality of power generating devices includes a motor driven by electric power supplied from the solar panel, and a motor that is driven by the motor and sucks water from the pit. a first pump that discharges the water, a first pump that guides the water discharged from the first pump upward, and a downcomer pipe that causes the water guided upward by the first pump to fall downward; This is a circulating hydroelectric power generation system characterized by comprising a water wheel that is rotated by the flow of water falling from the downcomer pipe, and a generator that generates electricity by the rotation of the water wheel.

According to the present invention, it is possible to provide a circulating hydroelectric power generation system with high versatility and expandability as an alternative to a power plant. Note that problems, configurations, and effects other than those described above will be made clear by the description of the embodiments below.

FIG. 1 is an overall configuration diagram of a circulating hydroelectric power generation system according to a first embodiment. FIG. 1 is a plan view schematically showing the first floor portion of the circulating hydroelectric power generation system according to the first embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view schematically showing a circulating hydroelectric power generation system according to a first embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view schematically showing a circulating hydroelectric power generation system according to a first embodiment. FIG. 1 is a plan view schematically showing a rooftop portion of the circulating hydroelectric power generation system according to the first embodiment. FIG. 2 is an overall configuration diagram of a circulating hydroelectric power generation system according to Modification 1. FIG. FIG. 2 is an overall configuration diagram of a circulating hydroelectric power generation system according to a second embodiment.

Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is an overall configuration diagram of a circulating hydropower generation system 100 according to the first embodiment, FIG. 2 is a plan view schematically showing the first floor of the circulation hydropower generation system 100, and FIG. 3 is a diagram of the circulation hydropower generation system 100. 4 is a front view schematically showing the circulating hydroelectric power generation system 100, and FIG. 5 is a plan view schematically showing the rooftop portion of the circulating hydroelectric power generation system 100. In FIG. 1, dotted lines indicate electrical wiring. Furthermore, for convenience of explanation, the X-axis, Y-axis, and Z-axis are defined as shown in FIGS. 2 to 5, respectively. Note that the X-axis direction, Y-axis direction, and Z-axis direction correspond to the longitudinal direction, lateral direction, and height direction of the circulating hydroelectric power generation system 100, respectively. Note that FIGS. 2 to 5 schematically show the main components of the circulating hydroelectric power generation system 100, and show detailed components (for example, steel frames, piping supports, maintenance steps and handrails, etc.). (elevators, etc.) are omitted.

As shown in FIGS. 1 to 5, the circulating hydroelectric power generation system 100 includes a pit 1 and a large number of power generation devices 10 (10A, B, . . . , P). In the circulating hydroelectric power generation system 100, for example, 8 x 2 = 16 power generation devices 10 are installed in a building 6 with a size of about 80 m in the X-axis direction, 15 m in the Y-axis direction, and 40 m in the Z-axis direction. This is an indoor power generation facility. That is, the circulating hydroelectric power generation system 100 is a completely indoor power generation facility whose ceiling and all sides are covered by the building 6. Note that the output of each power generation device 10 is 940 kw/h.

The pit 1 is a hole for storing water, and is dug from the floor surface 2 of the first floor, for example. The floor surface 2 is formed on both sides of the pit 1 in the Y-axis direction and extends in the X-axis direction. In other words, the floor surface 2 is provided so as to surround the pit 1 in the longitudinal direction. A plurality of (for example, 8 x 2 = 16) power generation devices 10 are arranged on this floor surface 2 . Specifically, eight power generators 10 are arranged on the floor 2, facing each other with the pit 1 in between, and aligned in the X-axis direction of the pit 1. Each power generation device 10 includes the same components. Hereinafter, when each power generation device 10 is to be explained separately, it will be referred to as power generation device 10A, 10B, etc., and each configuration of each power generation device 10 will also be given A and B at the end of the reference numeral. On the other hand, when there is no need to distinguish each power generation device 10, the power generation device 10 will be simply referred to as the power generation device 10, and the suffixes A and B of the reference numerals of each component of the power generation device 10 will also be omitted in the description.

The power generation device 10 includes a first engine 11, a first pump 12, a first pumping pipe 21, a second engine 15, a second pump 16, a second pumping pipe 22, a curved pipe 23, and a downcomer pipe. 24, a water turbine 30, a speed increaser 31, and a generator 32.

The first engine 11 is a biodiesel engine powered by biofuel. The second engine 15 is also a biodiesel engine. The water turbine 30 is, for example, a cross-flow water turbine, but other types of water turbines may also be used. The water turbine 30 is connected to a generator 32 via a speed increaser 31, and the rotation of the water turbine 30 causes the generator 32 to generate electricity. Further, the first pump 12 is driven by the first engine 11, rotates at, for example, 3600 rpm, and discharges a flow rate of 3 cubic meters per second. The second pump 16 also has the same configuration as the first pump 12 and is driven by the second engine 15.

A suction pipe 13 is attached to the suction port of the first pump 12 . Further, the suction pipe 13 is provided with a filter 14 . This filter 14 prevents foreign matter from being sucked into the first pump 12.

The first pump 12 and the water turbine 30 are connected by piping routed in the space above them. For example, to explain the piping of the power generation device 10A mainly with reference to FIG. 4, the first pump 12A and the second pump 16A are connected by the first pumping pipe 21A, and the second pump 16A and the water turbine 30A are connected. They are connected by a second pumping pipe 22A, a curved pipe 23A, and a downcomer pipe 24A. As shown in FIG. 4, the first water pump 21A and the second water pump 22A extend obliquely upward, but the direction in which they extend (the direction in which they incline) is opposite. Specifically, the first water pump 21A extends upward in the positive direction of the X-axis, while the second water pipe 22A extends upward in the negative direction of the X-axis. Further, the downcomer pipe 24 is connected to the second pumping pipe 22A via a curved pipe 23A, and extends vertically along the Z-axis direction.

Next, the piping of the power generation device 10C adjacent to the power generation device 10 will be explained mainly with reference to FIG. 4. The first pump 12C and the second pump 16C are connected by the first pump pipe 21C, The two pumps 16C and the water turbine 30C are connected by a second pumping pipe 22C, a curved pipe 23C, and a downpipe 24C. As shown in FIG. 4, the first water pump 21C and the second water pump 22C extend obliquely upward, but the direction in which they extend (the direction in which they incline) is opposite. Specifically, the first water pump 21C extends upward in the negative direction of the X-axis, while the second water pipe 22C extends upward in the positive direction of the X-axis. Further, the downcomer pipe 24C is connected to the second pumping pipe 22C via a curved pipe 23C, and extends vertically along the Z-axis direction.

In the adjacent pair of power generators 10A and 10C, the extending directions (inclination directions) of the first pumping pipe 21A and the first pumping pipe 21C are opposite to each other, and, There is a three-dimensional intersection (see Figure 3). Similarly, the extending directions (inclination directions) of the second pumping pipe 22A of the power generating device 10A and the second pumping pipe 22C of the power generating device 10C are opposite to each other, and they intersect with each other. ing. The first pumping pipes 21 (for example, 21B and 21D) and the second pumping pipes 22 (for example, 22B and 22D) in other adjacent sets of power generation devices (for example, 10B and 10D) are also inclined. The directions are opposite to each other, and they intersect with each other (see Fig. 3).

Further, as shown in FIG. 5, a large number of solar panels 40 are installed on the rooftop 5 of the building 6. Although not shown, a large number of solar panels 40 are also installed on the south side of the building 6. Electric power generated by the solar panel 40 is stored in a power storage device 42 also installed on the rooftop 5. Note that the power storage device 42 may be installed inside the building 6.

(how to use)
Next, a method of using the circulating hydroelectric power generation system 100 will be explained. When the operator turns on the power of the circulating hydroelectric power generation system 100, the electric power stored in the power storage device 42 turns the cell motors (starters) of the first engine 11 and the second engine 15, and biofuel is supplied to the first engine 11. and the second engine 15 is driven. Then, the first pump 12 and the second pump 16 are driven to suck water from the pit 1. Then, the sucked water flows in the order of the first water pump 21 , the second water pump 22 , the curved pipe 23 , and the downcomer pipe 24 and falls toward the water turbine 30 . The water wheel 30 is rotated by the water that has fallen, and the water that has rotated the water wheel 30 is returned to the pit 1. The rotational speed of the water turbine 30 is increased by a speed increaser 31 and transmitted to a generator 32. In this way, the generator 32 is driven and power generation is performed. In this way, power generation is performed by circulating the water in the pit 1. The electric power generated by the generator 32 is then supplied to the consumer 70 as appropriate.

As explained above, according to the circulating hydroelectric power generation system 100 according to the first embodiment, the following effects can be achieved.

Water can be stored in the pit 1 and circulated to generate electricity. Moreover, since the first engine 11 and the second engine 15 are biodiesel engines driven by biofuel, the circulation type hydroelectric power generation system 100 can be operated without emitting CO2. Therefore, electricity can be supplied in a clean environment without using fossil fuels unlike thermal power plants. Furthermore, it can provide access to cheap, reliable, sustainable, and modern energy as an alternative to thermal power plants. In addition, since the electric power generated by the solar panel 40 can be stored in the power storage device 42 and the cell motors of the first engine 11 and the second engine 15 can be turned by the electric power, even when the circulating hydroelectric power generation system 100 is in operation. , CO2 emissions can be eliminated. In other words, the circulating hydroelectric power generation system 100 can generate electricity without emitting any CO2.

Further, since the pit 1 and the power generation device 10 can be installed inside the building 6, there is no fear of contaminating the external environment. Furthermore, if it is desired to increase the amount of power supplied, this can be done by simply increasing the number of power generation devices 10, so it is highly versatile and expandable as an alternative to a power plant.

Further, for example, in a pair of adjacent power generation devices 10A and 10C, the first pumping pipe 21A and the first pumping pipe 21C are inclined in opposite directions, and are arranged to intersect with each other. Effective use of space is achieved, and compact piping can be routed. In particular, when the first lift pipe 21A and the first lift pipe 21C are intersected three-dimensionally as shown in FIGS. 3 and 4, the dimension in the X-axis direction can be made compact. By intersecting the first pumping pipes 21, 21 and the second pumping pipes 22, 22 for each adjacent set of power generation devices 10, 10 as described above, the dimension of the entire building 6 in the X-axis direction can be reduced. Can be made compact.

Further, in this embodiment, the downcomer pipe 24 is arranged vertically along the Z-axis, and after the water falls vertically, the flow direction of the water is changed to the horizontal direction and the water is introduced into the water turbine 30. Therefore, the water turbine 30 can be rotated efficiently. Therefore, it is possible to provide equipment with high power generation efficiency.

In this way, the circulating hydroelectric power generation system 100 according to the present embodiment is an excellent system that can contribute to the development goals of SDGs, and is very effective as an alternative to existing thermal power plants that use fossil fuels. In addition, as long as you have the necessary number of power generators 10 and water, you can supply electricity anywhere, including urban areas, rural areas, coastal areas, inland areas, etc., so it is easy to use even in areas without electric power facilities or in the event of an emergency disaster. Applicable to

(Modification 1)
Next, a modification of the circulating hydroelectric power generation system 100 according to the first embodiment will be described. FIG. 6 is an overall configuration diagram of a circulating hydroelectric power generation system according to Modification 1. In the first modified example, a bypass channel 25 is provided to flow water directly from the first pumping pipe 21 to the downpipe 24, bypassing the second pumping pipe and the curved pipe 23, and this bypass channel 25 is provided with an electromagnetic opening/closing device. The feature is that a valve 35 is provided.

According to this configuration, for example, when the electric power demand is low and it is desired to operate the circulating hydroelectric power generation system 100 at 50% load, a command to open the electromagnetic on-off valve 35 is output from a control room (not shown), and the second engine 15 to stop. Then, the water sucked in and discharged from the pit 1 by the first pump 12 flows through the first pumping pipe 21, flows through the bypass channel 25, and falls from the downcomer pipe 24, thereby rotating the water wheel 30. As a result, the rotational speed of the water turbine 30 can be reduced compared to normal operation, so that operation can be performed with a reduced amount of power generation. That is, in the first modification, efficient operation can be performed in accordance with the demands of the customer 70.

(Second embodiment)
Next, a circulating hydroelectric power generation system 200 according to a second embodiment of the present invention will be described. FIG. 7 is an overall configuration diagram of a circulating hydroelectric power generation system 200 according to the second embodiment. As shown in FIG. 7, the circulation type hydroelectric power generation system 200 according to the second embodiment replaces the first engine 11 and the second engine 15 in each configuration of the circulation type hydroelectric power generation system 100 according to the first embodiment. It is characterized in that it uses a first motor 51 and a second motor 52, and that it is equipped with a water merging device 60 that pumps up water from the pit 1 and merges it into the curved pipe 23. Hereinafter, these features will be mainly explained, and explanations that overlap with those of the first embodiment will be omitted.

The water merging device 60 includes a mixed flow pump 54 , a biodiesel engine (hereinafter referred to as engine) 53 that drives the mixed flow pump 54 , a pumping pipe 61 , a header 62 , and a branch pipe 63 . A suction pipe 64 is provided at the suction port of the mixed flow pump 54 . In this embodiment, two sets of water converging devices 60 are provided, one set at each end in the longitudinal direction of the circulating hydroelectric power generation system 200, but the number of sets is not limited to two.

Next, a method of using the circulating hydroelectric power generation system 200 will be explained. When the power of the circulating hydroelectric power generation system 200 is turned on, first, the first motor 51 and the second motor 52 are driven by the electric power stored in the power storage device 42, and each power generation device 10 generates power. A portion of the electric power generated by the power generation device 10 is also stored in the power storage device 42. In this way, the operation of the circulating hydroelectric power generation system 200 is started using the electric power generated by the solar panel 40 and the electric power generated by the power generation device 10.

When a predetermined amount of power can be supplied, the first motor 51 and the second motor 52 of the power generation device 10 are stopped, and the water merging device 60 is driven. That is, the engine 53 is started and the mixed flow pump 54 is driven. Water in the pit 1 is then pumped up by the mixed flow pump 54 and sent to the header 62 via the pumping pipe 61. Then, water is branched from the branch pipe 63 to each curved pipe 23, and the water is allowed to fall through each downcomer pipe 24, and each water turbine 30 is rotated to generate electricity. Even with such a configuration, the same effects as in the first embodiment can be achieved. Moreover, according to the second embodiment, since the first pump 12 and the second pump 16 can be driven by the electric first motor 51 and second electric motor 52, there is an advantage that the consumption of biofuel can be suppressed.

Note that the present invention is not limited to the above-described embodiments, and can be modified in various ways without departing from the gist of the present invention, and all technical matters included in the technical idea described in the claims are included in the present invention. Subject to invention. Although the embodiments described above are preferred examples, those skilled in the art can realize various alternatives, modifications, variations, or improvements based on the content disclosed in this specification. These are within the scope of the appended claims.

For example, depending on the amount of water (the flow rate of the first pump 12 and/or the second pump 16), the capacity of the water turbine 30, etc., the building 6 can be made into two stories, or conversely, the building 6 can be made into four stories or more. You can also. In any case, it is only necessary to design the building 6 and install a suitable power generation device 10 according to the required power demand and equipment scale, so the circulating hydroelectric power generation system according to the present invention has versatility and expandability. Highly sexual.

Although the water discharged from the first pump 12 flows through the first pumping pipe 21 and is directly sucked into the second pump 16, there is a gap between the first pumping pipe 21 and the second pump 16. A configuration may also be adopted in which a storage section such as a tray is provided and the second pump 16 sucks the water accumulated in the storage section.

Furthermore, instead of providing the pit 1, a configuration may be adopted in which a large number of storage tanks are provided. Furthermore, as shown in FIG. 3, a sub-pit 80 capable of storing water in the pit 1 may be provided. Specifically, the pit 1 and the sub-pit 80 may be connected by a pipe 81, and a gate valve 82 may be attached to the pipe 81. In this configuration, the gate valve 82 is closed during normal operation, but during maintenance of the circulating hydroelectric power generation system 100, the water in the pit 1 is temporarily stored in the sub-pit 80 by opening the gate valve 82. can be done. According to this configuration, the water in the pit 1 can be effectively used without being thrown away, so running costs can be further reduced.

Further, in the circulation hydroelectric power generation system 100 according to the first embodiment, a motor can be used instead of the first engine 11 and the second engine 15 that are driven by biofuel. In this case, power to the motor may be supplied from the power storage device 42. According to this configuration, a cost reduction effect can be expected because biofuel is not required. Similarly, in the circulating hydroelectric power generation system 200 according to the second embodiment, a motor may be used instead of the engine 53 driven by biofuel.

Further, it is preferable to provide a pipe for introducing rainwater collected on the rooftop 5 into the pit 1, since the rainwater can be effectively utilized.

Further, the configuration of the bypass flow path 25 and the electromagnetic on-off valve 35 according to the first modification may be applied to the circulating hydroelectric power generation system 200 according to the second embodiment.

1 Pit 2 Floor (1st floor)
3 Floor (2nd floor)
4 Floor (3rd floor)
5 Rooftop 6 Building 10 Power generation device 11 First engine 12 First pump 13 Suction pipe 14 Filter 15 Second engine 16 Second pump 21 First lift pipe 22 Second lift pipe 23 Bend pipe 24 Downpipe 25 Bypass flow path 30 Water turbine 31 Speed increaser 32 Generator 40 Solar panel 42 Power storage device 51 First motor 52 Second motor 53 Engine 54 Mixed flow pump 60 Water merging device 61 Lifting pipe 62 Header 63 Branch pipe 64 Suction pipe 70 Demand destination 80 Sub pit 81 Piping 82 Gate valve 100,200 Circulating hydroelectric power generation system.

In order to achieve the above object, one aspect of the present invention includes a pit that stores water, and a plurality of power generation devices arranged around the pit, each of which generates power using the head of the water. , each of the plurality of power generation devices includes a first engine driven by biofuel, a first pump driven by the first engine that sucks and discharges water from the pit, and a first pump that sucks water from the pit and discharges water from the first pump. a first pumping pipe that guides the water upwardly, a downcomer pipe that causes the water guided upwardly by the first pumping pipe to drop downward; a water wheel that is rotated by the flow of water falling from the downhill pipe; a generator that generates electricity by rotating a water wheel, and the first pumping pipes of each of the adjacent sets of power generation devices are arranged to intersect with each other. be.

Further, in order to achieve the above object, another aspect of the present invention includes a pit that stores water, and a plurality of power generation devices arranged around the pit, each of which generates power using the head of the water. , a solar panel that generates electricity using sunlight, and each of the plurality of power generating devices includes a motor driven by electric power supplied from the solar panel, and a motor that is driven by the motor and sucks water from the pit. a first pump that discharges the water, a first pump that guides the water discharged from the first pump upward, and a downcomer pipe that causes the water guided upward by the first pump to fall downward; A water wheel that rotates by the flow of water falling from the downcomer pipe, and a generator that generates electricity by the rotation of the water wheel , and the first pumping pipes of each of the adjacent sets of power generation devices intersect with each other. This is a circulating hydroelectric power generation system characterized by being arranged as follows .

Claims (8)

A pit for storing water,
A plurality of power generation devices arranged around the pit, each generating power using the head of water,
Each of the plurality of power generation devices is
a first engine powered by biofuel;
a first pump that is driven by the first engine and that sucks and discharges water from the pit;
a first water pump that guides water discharged from the first pump upward;
a downcomer pipe that causes water guided upward by the first pumping pipe to fall downward;
a water wheel rotated by the flow of water falling from the downcomer pipe;
A circulating hydroelectric power generation system comprising: a generator that generates electricity by rotating the water turbine. The circulating hydroelectric power generation system according to claim 1,
A circulating hydroelectric power generation system, wherein the plurality of power generation devices are arranged opposite to each other with the pit interposed therebetween and arranged side by side along the pit. The circulating hydroelectric power generation system according to claim 1 or 2,
A circulating hydroelectric power generation system, wherein the first pumping pipes of each of the adjacent sets of power generation devices are arranged to intersect with each other. The circulating hydroelectric power generation system according to claim 3,
The downcomer tube extends in a vertical direction. A circulating hydroelectric power generation system. The circulating hydroelectric power generation system according to claim 4,
Each of the plurality of power generation devices further includes:
a second engine powered by the biofuel;
a second pump that is driven by the second engine and that sucks and discharges water guided upward by the first pumping pipe;
a second pumping pipe that guides the water discharged from the second pump upward;
The circulating hydroelectric power generation system is characterized in that the downcomer pipe causes water guided upward by the first pumping pipe and further upwardly guided by the second pumping pipe to fall downward. The circulating hydroelectric power generation system according to claim 5,
A circulation type hydroelectric power generation system, wherein the second pumping pipes of each of the adjacent sets of power generation devices are arranged so as to intersect with each other. The circulating hydroelectric power generation system according to claim 6,
The ring-type hydroelectric power generation system, wherein the first and second lift pipes of each power generation device are inclined in opposite directions. A pit for storing water,
a plurality of power generation devices arranged around the pit, each of which generates power using the head of water;
Equipped with solar panels that generate electricity from sunlight,
Each of the plurality of power generation devices includes:
a motor driven by electric power supplied from the solar panel;
a first pump driven by the motor to suck in and discharge water from the pit;
a first water pump that guides water discharged from the first pump upward;
a downcomer pipe that causes water guided upward by the first pumping pipe to fall downward;
a water wheel rotated by the flow of water falling from the downcomer pipe;
A circulating hydroelectric power generation system comprising: a generator that generates electricity by rotating the water turbine.

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