Overland culturing apparatus and independence power supply device

Abstract

To provide an overland culturing apparatus capable of contributing to supply of whole power supplied to overland culturing with a renewable energy power generation device.SOLUTION: An overland culturing apparatus comprises: a rearing water tank that stores rearing water and is used for breeding an aquatic product; a filtration tank that is used for clarifying water quality of the rearing water tank; a circulation pump that circulates the rearing water between the filtration tank and the rearing water tank; a power generation device; a power storage battery that stores power generated in the power generation device; a power conversion device in which the power generation device is connected to the power storage battery to supply power to each part containing the circulation pump; and a control device that controls power supply to each part of a power conversion device. The control device estimates generation of a power generation suppression state, and supplies difference power of a power generation amount of the power generation device and a full-charging amount of the power storage battery to any part out of all parts at timing of the generation of the power generation suppression state. In the case where it is not at the timing of the generation of the power generation suppression state, control for reducing power consumption of any part is performed.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a land-based aquaculture device and an independent power supply device that can be used for closed circulation land-based aquaculture and the like. [Background technology]

[0002] In recent years, land-based aquaculture, such as fully closed circulation land-based aquaculture, partially fully closed circulation land-based aquaculture, and semi-closed circulation land-based aquaculture, has been attracting attention. In land-based aquaculture, marine resources and marine products (hereinafter referred to as fish and shellfish or simply marine products) are cultivated. However, if natural water from natural water sources such as the sea, rivers, and lakes is used for aquaculture, as in normal marine aquaculture, there is a risk of exposure to viruses, bacteria, parasites, etc., and the water quality must also be taken into consideration, and the location of the aquaculture facility is limited. Therefore, land-based aquaculture is isolated from external environments such as the sea, does not use natural water, or uses only natural water that has been purified or sterilized, etc., so that aquaculture facilities can be established even in places far from natural water sources, which is particularly advantageous in inland areas, is less susceptible to the effects of the external environment, makes water quality management easier, and allows for a stable supply of marine products.

[0003] An example of such a conventional technology related to land-based aquaculture is Patent Document 1 (closed circulation land-based aquaculture system). In this conventional technology, a breeding tank that holds breeding water and grows aquatic products, a filtration tank that purifies the water quality of the breeding tank, a circulation pump that delivers breeding water from the filtration tank to the breeding tank, a solar water heater that stores solar heat in a heat medium and transfers the heat of the heat medium to the breeding water, and electricity from renewable energy sources such as solar power generation and wind power generation or system power are used, and the breeding tank and the filtration tank are arranged side by side, and the circulation pump is installed below the water level of the lower of either the breeding tank or the filtration tank. In addition, this conventional technology further includes a water quality sensor that measures the water quality of the breeding water, and the operation of the circulation pump is started and stopped depending on the water quality level. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2023 / 062845 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned conventional technology, since the closed circulation land-based aquaculture system consumes a large amount of energy and therefore has a high environmental impact in terms of carbon dioxide emissions, the problem is to improve the energy consumption, and power consumption is reduced by arranging the breeding tank and the filtration tank side by side and installing the circulation pump below the water level of the lower of either the breeding tank or the filtration tank, and by starting and stopping the operation of the circulation pump depending on the water quality level. However, although this conventional technology is a closed circulation land-based aquaculture system that uses renewable energy, no measures are disclosed or suggested for increasing the proportion of renewable energy power generation in the power supplied in land-based aquaculture, or for supplying all of the power supplied in land-based aquaculture from a renewable energy power generation device.

[0006] An object of the present invention is to provide a land-based aquaculture device and an independent power supply device that can contribute to supplying all of the electricity supplied to land-based aquaculture using renewable energy power generation devices, in order to solve the problems of the conventional technology described above. [Means for solving the problem]

[0007] In order to achieve the above object, the land-based aquaculture device according to the present invention comprises: a breeding tank in which breeding water is stored and used for growing aquatic products; A filtration tank used to purify the water quality of the breeding aquarium; a circulation pump that circulates the breeding water between the filtration tank and the breeding aquarium; A power generation device; A storage battery that stores the power generated by the power generation device; a power conversion device connected to the power generation device and the storage battery and configured to supply power to each unit including the circulation pump; A control device that controls the supply of power to each of the components of the power conversion device; A land-based aquaculture device comprising: The control device estimates the occurrence of a power generation suppression state in which the storage battery becomes fully charged or there is a possibility that the storage battery will become fully charged while the power generation device is generating electricity, and when the time comes for the power generation suppression state to occur, supplies the differential power between the amount of power generated by the power generation device and the fully charged amount of the storage battery to one of the parts, and when the time comes for the power generation suppression state to occur, performs control to reduce the power consumption of one of the parts.

[0008] In order to achieve the above object, the independent power supply device according to the present invention comprises: An independent power supply device comprising: a power generation device that generates power using at least one of solar power generation and wind power generation; a storage battery that stores the power generated by the power generation device; a power conversion device that supplies power to land-based aquaculture that grows marine products on land and is connected to the power generation device and the storage battery; and a control device that controls the supply of power to the power conversion device, The control device estimates the occurrence of a power generation suppression state in which the storage battery becomes fully charged or there is a possibility that the storage battery will become fully charged while the power generation device is generating electricity, and when the time comes for the power generation suppression state to occur, supplies the differential power between the amount of power generated by the power generation device and the fully charged amount of the storage battery to one of the various parts, and when the time has not come for the power generation suppression state to occur, performs control to reduce the power consumption of one of the various parts. This independent power supply device is a device that can be used to supply power to the land-based aquaculture device. Here, the "parts" that supply the differential power are synonymous with the "parts including the circulation pump (in the land-based aquaculture device, etc.)" in the invention of the land-based aquaculture device.

[0009] The power generation device is typically a renewable energy power generation device, and may be at least one of a solar power generation device and a wind power generation device. The power conversion device is a power conditioner or the like incorporating the control device. Note that the above description merely describes what kind of control is performed in each case when the power generation suppression state occurs and when the power generation suppression state does not occur, that is, the above controls are not limited to each case. Therefore, for example, the control to reduce the power consumption of any of the above parts is not limited to only when the power generation suppression state does not occur, and may naturally be performed when the power generation suppression state occurs. On the other hand, the control to supply the differential power to any of the above parts is difficult to adopt in cases other than when the power generation suppression state occurs, since the differential power does not occur unless the power generation suppression state occurs. Here, the differential power corresponds to, for example, the power consumed by each of the above parts after the storage battery is fully charged when the generator continues to generate power when the storage battery is fully charged (including a case where it is estimated to be fully charged), that is, when power generation is not suppressed. For example, if the generator continues to generate power when the storage battery is fully charged, and each of the above-mentioned units continues to consume power, the difference in power is automatically consumed. In addition, the timing of the occurrence of the power generation suppression state and the timing of the occurrence of the power generation suppression state include, for example, after the control device estimates the occurrence of the power generation suppression state (after calculation) and before the estimation (before calculation, before estimation is completed), respectively.

[0010] Conventionally, for example, in the power generation suppression state, since the storage battery is fully charged, the power generation of the generator is suppressed so that the generator does not generate surplus power, that is, to balance the power supply amount and the demand amount of each part. Taking a solar power generation device or a wind power generation device as an example, even if a power generation output close to the maximum value is possible during the daytime when there is a lot of solar radiation or strong wind, when surplus power occurs, the power generation of the solar power generation device or the wind power generation device is suppressed. Therefore, when surplus power occurs while sufficient power should be obtained for land-based aquaculture, such power generation must be suppressed. Therefore, in order to avoid such surplus power generation, if the battery capacity (storage capacity) of the battery (storage battery) is selected according to the case when the generator generates the most power throughout the year (larger battery capacity), the possibility of surplus power not being generated increases, and the need for power generation suppression decreases.

[0011] However, in a power generation environment other than the case where the generator generates the most electricity, the battery capacity becomes surplus, and increasing the capacity of the battery may be a wasteful specification in terms of the cost increase and the weight of the battery. For this reason, the battery is not increased in capacity but is set to, for example, an average capacity. However, in this case, when the generator generates a large amount of electricity, even if electricity can be generated, it is not possible to store it, and surplus electricity is generated, so that it is necessary to limit the power generation. On the other hand, at night or when there is no wind, power generation devices such as solar power generation devices and wind power generation devices do not generate electricity, and the power stored in the battery is consumed to supply power to the above-mentioned various parts of the land-based aquaculture device. For this reason, if the power generation is not limited during the day, for example, and surplus electricity can be derived and this surplus electricity can be effectively utilized during the day, the consumption of the power stored in the battery at night, etc. as described above can be reduced, the battery capacity can be minimized, and a waste-free device can be realized. In other words, it also leads to the realization of supplying all the electricity supplied to land-based aquaculture by renewable energy power generation devices.

[0012] As described above, according to the above configuration, in the land-based aquaculture device of the present invention, the control device estimates the occurrence of the power generation suppression state, and when the power generation suppression state occurs, the control device supplies the differential power between the amount of power generated by the power generation device and the full charge amount of the storage battery to any of the above parts, and when the power generation suppression state does not occur, the control device controls to reduce the power consumption of any of the above parts. Therefore, in the land-based aquaculture device of the present invention, when the power generation suppression state occurs, the control device supplies the differential power, which is, for example, surplus power, to any of the above parts, and if the differential power is stored in another form, for example, by converting the differential power into heat and storing it in each part as described below, the differential power can be effectively used in land-based aquaculture. In addition, when heat is stored in this way, when it would normally be necessary to discharge the storage battery and heat it at a later time, such heating can be eliminated, and power consumption can be reduced. On the other hand, in the land-based aquaculture device of the present invention, when the power generation suppression state does not occur, the control device reduces the power consumption of any of the above parts (energy saving (also simply called energy saving) effect). As described above, the land-based aquaculture device according to the present invention can effectively utilize the differential power, which can be called surplus power, without suppressing power generation, and can also save energy, thereby contributing to supplying all power to land-based aquaculture from renewable energy power generation devices. The independent power supply device according to the present invention naturally achieves the same actions and effects as the land-based aquaculture device.

[0013] The land-based aquaculture device may be equipped with at least a temperature regulator that adjusts the water temperature of the breeding tank, and the temperature of the temperature regulator may be set above a reference value (exceeding the reference value) when the power generation suppression state occurs. In this case, if it is not time for the power generation suppression state to occur, the temperature of the temperature regulator may be set to a value lower than a reference value. According to the above configuration, when the temperature regulator is typically a heater, the water temperature of the rearing water is raised, and the surplus power (differential power) is converted into heat and stored (heat storage), and the surplus power (differential power) can be effectively used in land-based aquaculture. This can contribute to supplying all of the power supplied to land-based aquaculture from a renewable energy power generation device. Furthermore, at a later time that is not the timing of the occurrence of the power generation suppression state, the water temperature is higher than when the heat storage is not performed, so there is little adverse effect even if the temperature of the temperature regulator is set to less than the reference value. In other words, when the storage battery should be discharged and heating is required, such heating can be eliminated. This can contribute to supplying all of the power supplied to land-based aquaculture from a renewable energy power generation device. When the temperature regulator is a cooler, the words "exceeding the reference value" and "below the reference value" can be read interchangeably. Note that this configuration is more effective, for example, in the case of cultivating fish and shellfish that are resistant to temperature changes. The levels of "exceeding the standard value" and "below the standard value" are each set at appropriate values, taking into full consideration the tolerance of fish and shellfish, for example, based on the knowledge, experiments, observations, etc. of fisheries scientists.

[0014] The land-based aquaculture device may include a water supply / drainage pump that supplies water to or drains water from the filtration tank or the breeding tank, and may operate the water supply / drainage pump when the power generation suppression state occurs. The water supply / drainage pump may be either a water supply pump or a drainage pump, or may be a collective term for both a water supply pump and a drainage pump. Both pumps may be packaged in one housing or may be separate. Depending on the breeding conditions (farming conditions) of fish and shellfish, it may be necessary to supply external water such as seawater, which is natural water that has been purified, sterilized, etc., from the outside, and in this case, a water supply pump is required. Since this water supply / drainage pump also consumes a large amount of power, it is desirable to actively operate the water supply / drainage pump using surplus power when the power generation suppression state occurs, rather than driving the pump at night when it would normally be done at night. This makes it possible to effectively use surplus power (differential power) during the day, and also suppresses discharge from the storage battery at night when discharge would normally be necessary (energy saving), which contributes to supplying all power supplied to land-based aquaculture from a renewable energy power generation device.

[0015] The land-based aquaculture device may have a plurality of filter paths in the filtration tank, and may be able to change from one of the plurality of filter paths to another when it is not the time for the power generation suppression state to occur. When there are a plurality of filter paths, the degree of water pollution is detected and grasped by a water quality sensor or the like depending on, for example, pH, the amount of ammonia, the amount of dissolved oxygen [DO: Dissolved Oxygen], the resistance value of the breeding water, and the like, and the filter path is conventionally changed according to these values. At this time, if the degree of pollution is determined to be high and a path with a strong permeation resistance in the breeding water filter (i.e., a high filtering effect) is selected, the load on the circulation pump increases and power consumption increases. Therefore, the water quality tolerance of the fish and shellfish is also taken into consideration, and when it is not the time for the power generation suppression state to occur, the pump load is reduced by selecting the path with the weak permeation resistance, which can be effective in reducing power consumption. Note that, when the power generation suppression state occurs, the water quality may be improved in advance to a specified level by actively performing a filter process with a high filtering effect in the path with the strong permeation resistance. As a result, even at a later time when the power generation suppression state does not occur, the water quality can be improved compared to a case where the above-mentioned active filtering process is not performed. In other words, even if a route with a weak permeation resistance (i.e., a relatively low filtering effect) is selected when the power generation suppression state does not occur, as described above, the water quality does not necessarily deteriorate.

[0016] The land-based aquaculture device may reduce the flow rate of the circulation pump when the time is not the time for the power generation suppression state to occur. Pumps such as a circulation pump may be driven by a motor, and the power consumption may be close to that of a temperature regulator. The purpose of using the circulation pump is, for example, to circulate water to perform a filtering process and contribute to water purification. For example, depending on the breeding conditions, the breeding water may be highly purified, so the degree of contamination of the breeding water may be detected by the water quality sensor or the like, and if necessary and sufficient, the flow rate of the circulation pump may be adjusted by controlling the rotation speed as in the above configuration, thereby reducing the pump power. Effect of the Invention

[0017] The land-based aquaculture device and independent power supply unit of the present invention can contribute to providing all of the electricity for land-based aquaculture using renewable energy power generation devices. [Brief description of the drawings]

[0018] [Figure 1A] 1 is a schematic external view of a land-based aquaculture device according to one embodiment of the present invention. [Figure 1B] FIG. 2 is a schematic diagram of the internal layout of the land-based aquaculture device. [Diagram 2] FIG. 2 is a functional block diagram showing the configuration of each part of the land-based aquaculture device. [Diagram 3] FIG. 2 is a diagram showing an estimated flow in the land-based aquaculture device. [Figure 4] FIG. 11 is a flow diagram of an example of operation determination in the land-based aquaculture device. [Diagram 5] FIG. 11 is a flow chart of another example of operation determination in the land-based aquaculture device. [Figure 6] FIG. 2 is a configuration diagram of filter path switching in the land-based aquaculture device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] A land-based aquaculture device and an independent power supply device according to an embodiment of the present invention will be described with reference to the drawings. The independent power supply device according to this embodiment includes a power generation device that generates power from at least one of solar power generation and wind power generation, which are renewable energy power generation devices, a storage battery that stores the power generated by the power generation device, a power conversion device that connects the generator and the storage battery and supplies power to land-based aquaculture that grows marine products on land, and a control device that controls the power supply to the power conversion device. Figure 1A shows an independent power supply device 1' according to an embodiment of the present invention, in which a renewable energy power generation device is installed on, for example, a frame, wall, or ceiling of a housing.

[0020] FIG. 1A shows an example of an embodiment of the land-based aquaculture device according to the present invention, in which a renewable energy power generation device is installed on the frame, wall, and ceiling of a housing using the independent power supply device 1'. The land-based aquaculture device 1 and the independent power supply device 1' may have a housing 200, which is a container or the like for portability, and at least one of a solar panel (photovoltaic power generation device) 110 on the ceiling of the container 200 or the like and a windmill (wind power generation device) 130 on the wall of the container 200 or the like is installed. In this embodiment, both are installed as shown in the figure. The solar power generation device 110 and the wind power generation device 130 are examples of the power generation device 100, and the power generation device 100 is, for example, a renewable energy power generation device. Note that the renewable energy power generation device is not limited to these. The windmill 130 is preferably a vertical axis windmill, which is excellent in quietness. The land-based aquaculture device 1 may be, for example, a completely closed circulation type land-based aquaculture device that does not require water supply from the outside, but in this embodiment, it is a partially completely closed circulation type land-based aquaculture device or a semi-closed circulation type land-based aquaculture device in which external water such as seawater, which is natural water that has been purified, sterilized, etc., is supplied as rearing water and some of the rearing water is discharged. In a recirculating type land-based aquaculture, rearing water is circulated and used, but in a completely closed circulation type land-based aquaculture, water contamination is likely to progress and there may be cases where water needs to be periodically supplied from the outside, whereas in a partially completely closed circulation type land-based aquaculture, etc., water of relatively good quality is periodically supplied.

[0021] The independent power supply device 1' according to this embodiment includes a power supply device 100, a storage battery 700 for storing the power generated by the power supply device 100, a power conversion device 300 for supplying power to each part including a circulation pump 530 for circulating the rearing water between a rearing aquarium tank 910 in which rearing water is stored and used for rearing aquatic products and a filtration tank 930 for purifying the water quality of the rearing aquarium tank, and a control device 300 for controlling the power supply to each part of the power conversion device 300, as described below. The land-based aquaculture device 1 also includes the same power conversion device 300. Therefore, the explanation of the power conversion device, control device, etc. related to the independent power supply device 1' can be obtained from the explanation of the land-based aquaculture device 1 below, and therefore the explanation will be omitted.

[0022] 1B shows an outline of the layout inside the container 200 of the land-based aquaculture device 1. The land-based aquaculture device 1 includes a breeding tank 910 in which breeding water is stored and used for growing aquatic products, and a filtration tank 930 used for purifying the water quality of the breeding tank 910. A vertical drainage pipe 913 is provided in the breeding tank 910, and the breeding water overflows, for example, from the upper end of the pipe 913 near the water surface, and flows out from the lower end into the filtration tank 930 arranged lower than the breeding tank 910.

[0023] As shown in Fig. 2, the land-based aquaculture apparatus 1 of this embodiment includes at least the breeding tank 910, the filtration tank 930, a circulation pump 530 for circulating breeding water (also simply referred to as water) between the filtration tank 930 and the breeding tank 910, the power generation device 100, a storage battery (also referred to as battery) 700 for storing the power generated by the power generation device 910, a power conversion device 300 to which the power generation device 100 and the storage battery 700 are connected and which supplies power to each part including the circulation pump 530, and a control device for controlling the power supply of the power conversion device 300 to each part. The control device of this embodiment is present inside the power conversion device 300, and is also referred to as the reference symbol 300. Temperature control and water quality control are essential for raising fish and shellfish in an appropriate environment, and the land-based aquaculture apparatus 1 of this embodiment includes a filtration device such as a filter, a pump, a blower, a sterilization device, a temperature regulator, and the like, which will be described later. To maintain the water temperature, at least a portion of the breeding aquarium is covered with a heat insulating material (not shown), and preferably the filtration tank 930 and paths such as piping through which water circulates between the filtration tank 930 and the breeding aquarium 910 are covered with the heat insulating material. Note that in this embodiment, the filtration tank 930, circulation pump 530, breeding aquarium 910, etc. are connected in the order shown in the figure, and the breeding water circulates in the direction of the arrows in the figure, but this is not limited to this.

[0024] In this embodiment, the land-based aquaculture device 1 includes a water supply / drain pump 510 that supplies water to or drains water from the filtration tank 930 or the breeding tank 910. The external water is supplied to the filtration tank 930 via a water supply pump 511, such as an electric type, included in the water supply / drain pump 510, and the breeding water near the bottom of the filtration tank 930 is drained through a drain port (not shown) provided at the bottom. For example, the breeding water may be drained using a drainage pump 513, such as an electric type, included in the water supply / drain pump 510, but the water may be drained naturally by gravity without using the drainage pump 513, or may be drained from the top of the filtration tank 930 by overflow or the like. This eliminates the need to supply power to the drainage pump 513. The filtration tank 930 also includes a blower 933 at the bottom. The land-based aquaculture apparatus 1 has a blower 933 and a blower 911 (described later) for aeration, and the blower is specifically used, for example, to supply oxygen for respiration of fish and shellfish and oxygen for respiration of microorganisms that purify the water quality into the water, and is also used to stir up sludge containing leftover food and feces in the water. The filtration tank 930 has a physical filtration device such as a filter 931, and the breeding water in the filtration tank 930 passes through the filter 931 to filter out impurities before being sent to the circulation pump 530. Note that in the filtration tank 930, biological filtration may be performed instead of or in addition to the physical filtration.

[0025] The breeding water sent from the filtration tank 930 to the circulation pump 530 is sent to a sterilization device (an ultraviolet sterilization device, for example, in this embodiment) 550 by the discharge force of the pump, and the breeding water circulates in the direction of the arrow shown in Fig. 2. In the ultraviolet sterilization device 550, the filtered breeding water is sterilized, for example, by irradiation with ultraviolet rays. The breeding water sent from the ultraviolet sterilization device 550 reaches a temperature regulator 570, where the temperature is set according to a predetermined reference value and the breeding water is adjusted to a water temperature suitable for the fish and shellfish living in the breeding aquarium 910. The breeding water is then sent from the temperature regulator 570 to the breeding aquarium 910.

[0026] In the breeding tank 910, the aquatic products and fish and shellfish to be cultivated live, and predetermined objects are installed and the pH and water temperature are adjusted to create an environment in which the aquatic products and fish and shellfish can live. A blower 911 similar to the blower 933 is provided at the bottom. The breeding water in the breeding tank 910 increases in volume as it is sent from the temperature regulator 570 to the breeding tank 910, so that, as described above, the water overflows from the upper end of the pipe 913 near the water surface and flows out of the breeding tank 910 into the filtration tank 930. By repeating the above, the breeding water circulates and the water quality and water temperature are controlled. In this embodiment, the above-mentioned water supply and drainage pump 510, the filtration tank 930, the circulation pump 530, the sterilization device 550, the temperature regulator 570, and the breeding tank 910 are mounted in the container 200, and the breeding water circulation piping is also mounted in the container 200.

[0027] In the land-based aquaculture device 1 (and the independent power supply device 1') of this embodiment, the solar power generation device 110 and the wind power generation device 130 included in the power generation device 100 are connected to a battery (storage battery) 700 via a power conversion device 300 such as a power conditioner. The power generated by the power generation device 100 is charged (stored) in the battery 700, and the power generated by the power generation device 100 and the power stored in the battery 700 are discharged and supplied to each part such as the blower 933 of the filtration device 930, the circulation pump 530, the sterilization device 550, the heater or cooler of the temperature regulator 570, and the blower 911 of the breeding aquarium 910 via the power conversion device 300. In this embodiment, the power supply to each part of the power conversion device 300 is controlled by a control device 300 built into the power conversion device 300. The control device 300 includes a ROM having a control program therein, a processor for executing the control program, and the like. For example, the power conversion device 300 and the power storage device 700 are mounted in a container 200. The power conversion device 300 may be powered from a system power supply (not shown), but in this embodiment, the system power supply is not used. The power stored in the storage battery 700 is converted to AC by an inverter (not shown) and supplied to each of the above-mentioned parts.

[0028] In the land-based aquaculture device 1 having the housing 200 such as a container, the power generation device 100 is attached to the roof or wall of the housing 200, for example, so that the structure can withstand typhoons and earthquakes, and the water tanks and the like inside the housing are fixed using floors, pillars, walls, etc., so that it is possible to reduce the risk of the housing 200 falling over during typhoons, earthquakes, etc. Furthermore, the land-based aquaculture device 1 can be installed permanently, and can also be moved.

[0029] In the land-based aquaculture device 1 of this embodiment, the control device 300 estimates the occurrence of a "power generation suppression state" in which the storage battery 700 is fully charged or there is a possibility that the storage battery 700 will be fully charged while the power generation device 100 is generating electricity. When the power generation suppression state occurs, the control device 300 supplies the differential power between the amount of power generated by the power generation device 100 and the amount of full charge of the storage battery 700 to any of the above-mentioned parts, and when the power generation suppression state does not occur, the control device 300 performs control to reduce the power consumption of any of the above parts. Note that the control to reduce the power consumption of any of the above parts is not limited to only when the power generation suppression state does not occur, and may be performed when the power generation suppression state occurs, etc.

[0030] Here, the difference power corresponds to the power consumed by each of the above-mentioned components after the storage battery is fully charged, for example, when the generator continues to generate power when the storage battery is fully charged (including the case where it is estimated that the storage battery will be fully charged), i.e., when power generation is not suppressed. For example, when the generator continues to generate power when the storage battery is fully charged, if each of the above-mentioned components continues to consume power, the difference power is automatically consumed.

[0031] Next, using the estimation flow shown in Figure 3, the control device 300 first estimates the state in which the battery 700 is fully charged and the state in which the storage battery 700 is likely to be fully charged, i.e., estimates the occurrence or possibility of a power generation suppression state, and then, at the timing when the power generation suppression state occurs, performs control to supply the difference power between the amount of power generated by the power generation device and the fully charged amount of the storage battery to one of the above-mentioned parts (active power utilization control), and when it is not the timing for the power generation suppression state to occur, performs control to reduce the power consumption of one of the above-mentioned parts (power reduction control). An outline of the operation will be given below.

[0032] At the stage FL1, the control device 300 receives inputs of actual measurements such as the battery voltage, power consumption of each component, and power generation amount of the power generation device 100, as well as solar radiation information from announcements by the Japan Meteorological Agency and a solar power generation output prediction API. At the stage FL2, the control device 300 predicts the amount of power generation using the solar radiation information and estimates whether the battery 700 is in a fully charged state or in a state where surplus power is generated, taking into account the actual measurements. At the stage FL3, the control device 300 receives the estimation result and executes active power utilization and / or power reduction (energy saving) control, and outputs, for example, signals for setting the temperature of a thermoregulator, controlling the operation timing of a water supply and drainage pump, controlling the switching of filter paths, and controlling the flow rate of a circulation pump, which will be described later, in this embodiment.

[0033] Using FIG. 4, the determination of whether to use active power or reduce power will be described with reference to the temperature setting of the temperature regulator 570 including a heater that adjusts the water temperature of the breeding aquarium 910, i.e., the temperature of the circulating breeding water. The flow described using FIG. 4, the flow described using FIG. 5 described later, and other flows of active power use and power reduction may be executed in parallel or individually. After starting the power conversion device (control device) 300, etc., it is determined whether the battery 700 is fully charged, i.e., whether the power generation suppression of the power generation device 100 occurs, based on the result of the estimation that the battery 700 will be fully charged, etc. (Step S1). If it is determined that the battery 700 is not fully charged, the process proceeds to Step S2, where it is determined whether the battery 700 may be fully charged, i.e., whether the power generation suppression of the power generation device 100 may occur, based on the result of the estimation that the battery 700 may be fully charged, based on the solar radiation estimation value, etc. If it is determined that the battery 700 cannot be fully charged, the process returns to Step S1. If it is determined in step S1 that the battery 700 is fully charged, or if it is determined in step S2 that a state in which the battery 700 becomes fully charged may occur, the process proceeds to step S3. If it is determined in step S3 that the fish and shellfish (marine products) to be cultured are resistant to temperature changes within a predetermined range, the process proceeds to step S4, and if it is determined that they are not resistant, the process returns to step S1. In step S4, the control device 300 lowers the set temperature of the temperature regulator 570 below the set temperature (reference value), for example, by about 5 degrees, if the temperature regulator 570 includes a cooler, and raises the set temperature of the temperature regulator 570 above the set temperature (reference value), for example, by about 5 degrees, if the temperature regulator 570 includes a heater.

[0034] In the above flow, the land-based aquaculture device 1 of this embodiment includes at least a temperature regulator 570 that adjusts the water temperature of the breeding aquarium tank 910, and sets the temperature of the temperature regulator 570 above a reference value (exceeding the reference value) at the timing when the power generation suppression state occurs. After this, at night or the like, when it is not the timing when the power generation suppression state occurs, the temperature can be set below the set temperature (reference value).

[0035] According to the above configuration, when the temperature regulator 570 is typically a heater, the water temperature of the rearing water is raised to convert surplus power (differential power) into heat and store it (heat storage), and the surplus power (differential power) can be effectively used in land-based aquaculture. Therefore, it is possible to contribute to supplying all of the power supplied to land-based aquaculture from a renewable energy power generation device. Furthermore, at a later time when the power generation suppression state does not occur, the water temperature is higher than when the heat storage is not performed, so there is little harm even if the temperature of the temperature regulator 570 is set below the reference value. In other words, when the battery 700 should be discharged and heated, such heating is not necessary. Therefore, it is possible to contribute to supplying all of the power supplied to land-based aquaculture from a renewable energy power generation device. Note that this configuration is more effective, for example, in the case of cultivating fish and shellfish that are resistant to temperature changes. The degree of the above-mentioned "exceeding the reference value" and "below the reference value" is set to an appropriate value, for example, based on the knowledge, experiments, observations, etc. of fisheries scientists, etc., after fully considering the resistance of the fish and shellfish.

[0036] Next, with reference to FIG. 5, another operation judgment of active power utilization or power reduction will be described by taking the control of pumps as an example. In this embodiment, the control device 300 controls the operation timing of the water supply and drainage pump 510 that supplies or drains water to the filtration tank 930 or the breeding aquarium 910, and controls the flow rate of the circulation pump 530. After starting the power conversion device (control device) 300, etc., the process proceeds to step T3 through steps T1 and T2, which correspond to steps S1 and S2 described above, respectively. If the fish and shellfish (marine products) to be cultured are resistant to deterioration of water quality within a predetermined range, the process proceeds to step T4 if the water quality is outside the range of the specified values ​​based on the detection results of the water quality sensor, etc., in step T3, and if it is determined that the water quality is not outside the range of the specified values, the process returns to step T1. In step T4, the control device 300 issues an instruction to supply and / or drain water at the timing when the power generation suppression state occurs, whereas the water supply and drainage operation is normally performed at night.

[0037] In the above flow, the land-based aquaculture apparatus 1 of this embodiment is provided with a water supply / drainage pump 510 that supplies water to or drains water from the filtration tank 930 or the breeding aquarium tank 910, and operates the water supply / drainage pump 510 at the timing when the power generation suppression state occurs. On the other hand, in the land-based aquaculture apparatus 1 of this embodiment, when the timing is not when the power generation suppression state occurs, the flow rate of the circulation pump 530 is adjusted, for example, the flow rate of the circulation pump 530 is reduced.

[0038] Depending on the rearing conditions (farming conditions) of the fish and shellfish, it may be necessary to supply external water such as seawater, which is natural water that has been purified and sterilized, from outside, and in this case, a water supply pump is required. Since this water supply and drainage pump 510 also consumes a lot of power, it is desirable to operate the water supply and drainage pump 510 proactively using surplus power when the power generation suppression state occurs, rather than driving the pump at night when it would normally be done at night. This allows for effective use of surplus power (power difference) during the day, etc., and also suppresses discharge from the storage battery at night when discharge would normally be necessary (energy saving), thereby contributing to supplying all power supplied to land-based aquaculture from renewable energy power generation devices.

[0039] On the other hand, pumps such as the circulation pump 530 may be driven by a motor, and the power consumption may be close to that of a temperature regulator. The purpose of using the circulation pump 530 is, for example, to circulate water to perform a filtering process in the filtration tank 930 and contribute to purifying the water. For example, depending on the breeding conditions, the breeding water may be highly purified, so the degree of contamination of the breeding water may be detected by the water quality sensor or the like, and if necessary and sufficient, the flow rate of the circulation pump may be adjusted by controlling the number of revolutions as in the above configuration, thereby reducing the pump power. In addition, in the same manner as above, for example, the control of turning on and off ultraviolet irradiation of the sterilization device 550 may be performed depending on the detection result of the water quality sensor or the like, thereby reducing the power consumption of the pump.

[0040] Using FIG. 6, the switching of the filter path in the filter 931 in the filtration water tank 930 will be described. In the land-based aquaculture device 1 of this embodiment, the filtration tank 930 has multiple filter paths 1 and 2, and when it is not the timing for the power generation suppression state to occur, one of the multiple filter paths 1 and 2 can be changed to another filter path. Filter path 1 has two filters, filters 1A and 1B, and has a high filtering effect and a high permeation resistance in the filter of the breeding water. Filter path 2 has only filter 2, and has a lower filtering effect than filter path 1, while the permeation resistance in the filter of the breeding water is low. The filter path is changed by switching with the path switching unit SW under the control of the control device 300.

[0041] When there are multiple filter paths as described above, the degree of water pollution is detected and understood by a water quality sensor or the like, and conventionally, the filter path is changed according to these values. At this time, if the degree of pollution is determined to be high from the perspective of filtering effect and a path with a strong permeation resistance in the filter of the breeding water is selected, the load on the circulation pump increases and power consumption increases. Therefore, the water quality resistance of the fish and shellfish is also taken into consideration when making a judgment, but when it is not the timing of the occurrence of the power generation suppression state, the pump load is reduced by selecting the above-mentioned path with a weak permeation resistance, which can be effective in reducing power consumption. In addition, when the power generation suppression state occurs, the water quality may be improved in advance to a specified level by actively performing a filter process with a high filtering effect on the above-mentioned path with a strong permeation resistance. This makes it possible to improve the water quality even at a later time when the power generation suppression state does not occur, compared to when the above-mentioned active filter process is not performed. In other words, even if the above-mentioned path with a weak permeation resistance is selected when it is not the timing of the occurrence of the power generation suppression state, it is possible to prevent the water quality from necessarily deteriorating.

[0042] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0043] 1. Land-based aquaculture equipment 1' independent power supply 100 Power generation equipment 110 Solar panels (photovoltaic power generation equipment) 130 Windmill (wind power generation equipment) 300 Power conversion device, control device 510 Water Supply and Drainage Pump 530 Circulation Pump 570 Temperature controller 700 Battery (storage battery) 910 Breeding tank 930 Filtration tank 931 Filters

Claims

1. a breeding tank in which breeding water is stored and used for growing aquatic products; A filtration tank used to purify the water quality of the breeding tank; a circulation pump that circulates the breeding water between the filtration tank and the breeding aquarium; A power generation device; A storage battery that stores the power generated by the power generation device; a power conversion device connected to the power generation device and the storage battery and configured to supply power to each unit including the circulation pump; A control device that controls the supply of power to each of the components of the power conversion device; A land-based aquaculture device comprising: the control device estimates the occurrence of a power generation suppression state in which the storage battery is fully charged or there is a possibility that the storage battery will be fully charged while the power generation device is generating electricity, and when the timing for the occurrence of the power generation suppression state is not right, supplies a differential power between the amount of power generated by the power generation device and the fully charged amount of the storage battery to any of the components, and when the timing for the occurrence of the power generation suppression state is not right, performs control to reduce power consumption of any of the components. Land-based aquaculture equipment.

2. 2. An aquaculture device according to claim 1, comprising a temperature regulator that adjusts the water temperature of at least the breeding tank, and wherein the temperature of the temperature regulator is set to a value higher than a reference value when the power generation suppression state occurs.

3. 3. The land-based aquaculture device according to claim 2, wherein when it is not time for the power generation suppression state to occur, the temperature of the temperature regulator is set to a value lower than a reference value.

4. 2. An aquaculture device according to claim 1, comprising a water supply / drainage pump that supplies or drains water to the filtration tank or the breeding tank, and which operates the water supply / drainage pump when the power generation suppression state occurs.

5. 2. An aquaculture device as described in claim 1, comprising a plurality of filter paths in the filtration tank, and capable of changing from one of the plurality of filter paths to another of the filter paths when it is not the time for the power generation suppression state to occur.

6. 2. The land-based aquaculture device according to claim 1, wherein the flow rate of the circulation pump is reduced when the time has not come for the power generation suppression state to occur.

7. An independent power supply device comprising: a power generation device that generates power using at least one of solar power generation and wind power generation; a storage battery that stores the power generated by the power generation device; a power conversion device that supplies power to land-based aquaculture that grows marine products on land and is connected to the power generation device and the storage battery; and a control device that controls the supply of power to the power conversion device, The control device estimates the occurrence of a power generation suppression state in which the storage battery becomes fully charged or there is a possibility that the storage battery will become fully charged while the power generation device is generating electricity, and when the time comes for the power generation suppression state to occur, supplies the differential power between the amount of power generated by the power generation device and the fully charged amount of the storage battery to one of the various parts, and when the time has not come for the power generation suppression state to occur, performs control to reduce the power consumption of one of the various parts.

Images