Water temperature control system using deep seawater, water temperature control method, and marine farming facility utilizing same

Abstract

The present invention provides a water temperature control system that uses deep seawater to control the temperature of an inner space provided by a seawater tank. The water temperature control system comprises: a sensing unit for monitoring environmental conditions of the inner space; a seawater transfer line of which an end part is disposed at a location to which the deep seawater is supplied; a pump that provides a suction force to the seawater transfer line and draws the deep seawater up into the inner space by using the downward pressure formed by the seawater; and a control unit for controlling the pump, wherein the control unit can control the output of the pump on the basis of the environmental conditions monitored by the sensing unit.

Description

Temperature control system using deep seawater, temperature control method, and marine aquaculture facility using the same

[0001] The present invention relates to a water temperature control system for controlling the temperature of surface water using deep seawater, a control method, and a marine aquaculture facility using the same.

[0002] Recently, sea surface temperatures have been rising due to global warming. Rising water temperatures reduce dissolved oxygen in seawater, making it difficult for fish to breathe. Furthermore, high water temperatures trigger excessive growth of phytoplankton, which increases red tides. This can lead to fish suffocation.

[0003] Marine farmed fish are particularly sensitive to changes in water temperature. A 1°C rise in seawater temperature causes marine farmed fish a level of stress similar to that experienced by terrestrial fish at a 10°C rise. Therefore, rising sea surface temperatures during the summer are highly likely to result in mass mortality within farms. Each year, these losses inflict billions of won on the aquaculture industry.

[0004] Meanwhile, deep seawater has a low temperature, high density, and contains a large amount of clean nutrients. Specifically, deep seawater contains nitrate (NO3) produced when organic matter contained in surface water sinks and decomposes. - ) and phosphate (PO4 3- ) can contain large amounts of inorganic nutrients such as CO₂. Therefore, in areas where deep-sea water naturally upwells, an environment is created in which various marine life can grow healthily. This is because the upwelling deep-sea water not only maintains a low temperature of the surface water, but also contains an abundance of dissolved oxygen and nutrients. The nutrients supplied as the deep water rises promote the proper growth of phytoplankton and play a role in strengthening the marine food chain. In addition, deep water has a high concentration of dissolved oxygen, which helps marine life active in the surface water to breathe smoothly.

[0005] The purpose of the present invention is to provide a temperature control system for artificially upwelling deep seawater to lower the water temperature of aquaculture facilities, a temperature control method, and a marine aquaculture facility using the same.

[0006] In addition, the present invention aims to provide a temperature control system, a temperature control method, and a marine aquaculture facility using the same, which are capable of drawing up deep seawater with relatively little power.

[0007] In addition, the present invention aims to provide a water temperature control system, a water temperature control method, and a marine aquaculture facility using the same, which supply deep seawater to a seawater tank of a marine aquaculture facility to create an appropriate water temperature, dissolved oxygen content, pH, and water flow, thereby improving the productivity of the marine aquaculture facility.

[0008] In addition, the present invention aims to provide a water temperature control system, a water temperature control method, and a marine aquaculture facility configured to measure the amount of sunlight irradiated on the sea surface and supply deep water to a seawater tank based on the measured amount of sunlight.

[0009] In addition, the present invention aims to provide a water temperature control system, a water temperature control method, and a marine aquaculture facility capable of maintaining the water temperature of the internal space of a seawater tank relatively evenly.

[0010] The present invention provides a temperature control system that controls the temperature of an internal space provided by a seawater tank using deep water. The temperature control system comprises: a sensing unit that monitors environmental conditions of the internal space; a seawater transport line having an end positioned at a location where the deep water is provided; a pump that provides suction to the seawater transport line and draws the deep water into the internal space using downward pressure formed by the seawater; and a control unit that controls the pump, wherein the control unit can control the output of the pump based on the environmental conditions monitored by the sensing unit.

[0011] In one embodiment, the sensing unit may include at least one of a temperature sensor for measuring the temperature of the internal space, a dissolved oxygen sensor for measuring dissolved oxygen of the internal space, a pH sensor for measuring pH of the internal space, and a camera for monitoring fish movements in the internal space.

[0012] In one embodiment, the control unit can control the pump to draw the deep water into the internal space when the temperature, the dissolved oxygen, the pH, and the fish movement exceed preset threshold ranges.

[0013] In one embodiment, the water temperature control system may include a solar panel that converts solar energy to generate electricity; and a power unit that stores electricity generated by the solar panel and supplies the electricity to the pump.

[0014] In one embodiment, the control unit can control the output of the pump based on the power generated by the solar panel.

[0015] In one embodiment, the control unit may increase the output of the pump in proportion to the rate at which the power is generated by the solar panel.

[0016] In one embodiment, the control unit may increase the output of the pump in proportion to the amount of power generated by the solar panel.

[0017] In one embodiment, the control unit may change the output of the pump after a set period of time has elapsed after the rate at which the power generated by the solar panel is changed.

[0018] In one embodiment, the control unit may calculate the amount of power generated during the set time and change the output of the pump based on the calculated amount of power generated.

[0019] In one embodiment, the control unit may change the output of the pump from a first output to a second output when the amount of power generated during the set time is a first amount, and may change the power from the first output to a third output that is greater than the second output when the amount of power generated during the set time is a second amount that is greater than the first amount.

[0020] According to one embodiment, the water temperature control system further includes a nozzle unit that supplies the deep water drawn up by the pump to the internal space, and the nozzle unit may include a first nozzle that supplies the deep water to the internal space from above the sea surface; and a second nozzle that supplies the deep water to the internal space from below the sea surface.

[0021] In one embodiment, the spraying methods of the first nozzle and the second nozzle may be different from each other.

[0022] In one embodiment, the first nozzle may be configured to supply the deep water in a spray manner, and the second nozzle may be configured to supply the deep water in a stream manner.

[0023] In one embodiment, the first nozzle and the second nozzle may be provided in plurality.

[0024] In one embodiment, when viewed from above, the second nozzles may spray the deep water in different directions.

[0025] According to one embodiment, the constant water temperature control system may further include a stirring unit disposed in the internal space, positioned below the second nozzle, and configured to stir the seawater in the internal space.

[0026] In one embodiment, the seawater transport line includes a first transport line transporting the deep water at a first location; and a second transport line transporting the deep water at a second location higher than the first location, wherein the control unit can control the pump and the seawater transport line to draw up the deep water through a line selected from the first transport line and the second transport line, based on the environmental conditions measured by the sensing unit.

[0027] According to one embodiment, the pump includes a first pump connected to the first transfer line; and a second pump connected to the second transfer line, and the nozzle unit includes a plurality of first nozzles and second nozzles, and when viewed from above, the first nozzle and the second nozzle located at an edge region of the internal space are configured to supply the deep water drawn up by the first pump, and the nozzle and the second nozzle located at a central region of the internal space are configured to supply the deep water drawn up by the second pump.

[0028] The present invention also provides a marine aquaculture facility. The aquaculture facility may include the water temperature control system and the seawater tank.

[0029] In addition, the present invention provides a water temperature control method for controlling the water temperature of an internal space of an aquaculture facility using deep water. The water temperature control method comprises: an environmental condition monitoring step of monitoring an environmental condition of the internal space, wherein the environmental condition includes at least one of temperature, dissolved oxygen content, pH, and movement of fish in the internal space; a pump control condition calculation step of estimating, when the environmental condition is out of a critical range, the amount and temperature of the deep water required for the environmental condition to come within the critical range, and calculating a control condition of a pump for drawing up the deep water into the internal space based on the estimated amount and temperature of the deep water; a deep water transfer step of transferring the deep water located below the internal space into the internal space through a seawater transfer line by the pump to which the control condition is applied; And after the deep water transport step, an environmental condition determination step is included to re-measure the environmental conditions of the internal space and determine whether the environmental conditions are within the critical range, and in the pump control condition calculation step, the control conditions of the pump can be calculated by considering the upward pressure applied to the seawater transport line by the downward pressure of the seawater.

[0030] According to one embodiment of the present invention, the water temperature of aquaculture facilities can be lowered by artificially upwelling deep seawater.

[0031] Additionally, according to one embodiment of the present invention, it is possible to draw up deep seawater with relatively little power.

[0032] In addition, according to one embodiment of the present invention, by supplying deep seawater to a seawater tank of a marine aquaculture facility, appropriate water temperature, dissolved oxygen content, pH, and water flow can be created, thereby improving the productivity of the marine aquaculture facility.

[0033] In addition, according to one embodiment of the present invention, it can be configured to measure the amount of sunlight irradiated on the sea surface and supply deep water to the seawater tank based on the measured amount of sunlight.

[0034] Additionally, according to one embodiment of the present invention, the water temperature of the internal space of the seawater tank can be maintained relatively evenly.

[0035] The effects of the present invention are not limited to the effects described above, and effects not mentioned can be clearly understood by a person skilled in the art to which the present invention pertains from this specification and the attached drawings.

[0036] FIG. 1 is a schematic drawing of a water temperature control system and a marine aquaculture facility including the same according to one embodiment of the present invention.

[0037] Figure 2 is a drawing showing the first nozzle of Figure 1 supplying deep water.

[0038] Figure 3 is a drawing showing the second nozzle of Figure 1 supplying deep water.

[0039] Figure 4 is a graph schematically illustrating the pump output required according to the distance between the deep water and the pump when the pump draws up deep water.

[0040] Figure 5 is a graph schematically illustrating an example of the power generation rate generated by a solar panel and the pump output control according to the rate.

[0041] Figures 6 and 7 are graphs schematically illustrating another example of the power generation rate generated by a solar panel and the pump output control according to the rate.

[0042] Figure 8 is a flow chart for explaining a water temperature control method according to one embodiment of the present invention.

[0043] FIG. 9 is a schematic drawing of a water temperature control system and a marine aquaculture facility including the same according to another embodiment of the present invention.

[0044] FIG. 10 is a drawing illustrating first nozzles according to another embodiment of the present invention.

[0045] FIG. 11 is a drawing illustrating second nozzles according to another embodiment of the present invention.

[0046] FIG. 12 is a drawing illustrating first nozzles according to another embodiment of the present invention.

[0047] FIGS. 13 and 14 are drawings showing a water temperature control system according to one embodiment of the present invention and a marine aquaculture facility including the same when installed in a different area from FIG. 1.

[0048] The various features and advantages of the non-limiting embodiments of this disclosure will become more apparent upon review of the detailed description in conjunction with the accompanying drawings. The accompanying drawings are provided for illustrative purposes only and should not be construed as limiting the scope of the claims. The accompanying drawings are not to scale unless explicitly stated otherwise. Various dimensions in the drawings may be exaggerated for clarity.

[0049] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. These exemplary embodiments are provided so that this disclosure will be thorough and will fully convey the scope of the present disclosure to those skilled in the art. To provide a thorough understanding of the embodiments of the present disclosure, numerous specific details, such as examples of specific components, devices, and methods, are set forth. It will be apparent to those skilled in the art that specific details are not necessarily required, and that the exemplary embodiments can be implemented in many different forms, and neither should be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known device structures, and well-known techniques are not described in detail.

[0050] The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the example embodiments. As used herein, the singular or non-plural forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "including," and "having" are open-ended and thus specify the presence of stated features, elements, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, elements, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations herein are not necessarily to be construed as necessarily being performed in the particular order discussed or described, unless such order is explicitly stated. Additionally, additional or alternative steps may be selected.

[0051] When an element or layer is referred to as being "on," "connected," "joined," "attached," "adjacent," or "covering" another element or layer, it is intended that it is directly on, connected, joined, attached, adjacent, or covering said other element or layer, or that intermediate elements or layers may be present. Conversely, when an element is referred to as being "directly on," "directly connected to," or "directly coupled to" another element or layer, it should be understood that no intermediate elements or layers are present. Like reference numerals refer to like elements throughout the specification. The term "and / or" as used herein includes all combinations and subcombinations of one or more of the listed items.

[0052] Although terms such as first, second, third, etc. may be used herein to describe various elements, regions, layers, and / or sections, it should be understood that these elements, regions, layers, and / or sections are not limited by these terms. These terms are used merely to distinguish one element, region, layer, or section from another element, region, layer, or section. Thus, a first element, a first region, a first layer, or a first section discussed below could also be referred to as a second element, a second region, a second layer, or a second section without departing from the teachings of the exemplary embodiments.

[0053] Spatially relative terms (e.g., "beneath," "beneath," "lower," "above," "top," etc.) may be used for convenience of description to describe the relationship of one element or feature to other element(s) or features as depicted in the drawings. It should be understood that spatially relative terms are intended to encompass not only the orientation depicted in the drawings, but also other orientations of the device in use or operation. For example, if the device in the drawings were turned over, elements described as "beneath" or "below" other elements or features would then be oriented "above" the other elements or features. Thus, the term "beneath" can encompass both above and below orientations. The device can be oriented differently (rotated 90 degrees, or at other orientations), and the spatially relative descriptive phrases used herein can be interpreted accordingly.

[0054] When using the terms "same" or "same" in the description of embodiments, it should be understood that there may be some inaccuracy. Therefore, when one element or value is referred to as being the same as another element or value, it should be understood that the element or value is the same as the other element or value within a manufacturing or operating tolerance (e.g., ±10%).

[0055] When the terms "approximately" or "substantially" are used herein in connection with a numerical value, it should be understood that the numerical value includes manufacturing or operating tolerances (e.g., ±10%) of the stated value. Furthermore, when the terms "typically" and "substantially" are used in connection with geometrical shapes, it should be understood that geometrical accuracy is not required, but that latitude in the shape is within the disclosed scope.

[0056] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the exemplary embodiments pertain. Furthermore, terms, including terms defined in commonly used dictionaries, should be interpreted to have a meaning consistent with their meaning within the context of the relevant art, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0057] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 14.

[0058] FIG. 1 is a schematic drawing of a water temperature control system and a marine aquaculture facility including the same according to one embodiment of the present invention.

[0059] Referring to FIG. 1, a marine aquaculture facility (10) according to one embodiment of the invention may be configured to cultivate marine aquatic products such as fish in various ways. The marine aquaculture facility (10) may be configured to cultivate marine aquatic products in various known ways, such as pond aquaculture, flow-through aquaculture, cage aquaculture, recirculating filtration aquaculture, and discharge-replenishment aquaculture. The marine aquaculture facility (10) may be installed in various regions. For example, it may be installed in various regions, such as the east coast, west coast, or south coast of Korea.

[0060] The marine aquaculture facility (10) may include a seawater tank (100) and a water temperature control system (200). The seawater tank (100) may be provided in a form that floats on the sea surface (1). The seawater tank (100) may provide an internal space (102). Marine products such as fish may be provided in the internal space (102) provided by the seawater tank (100). Seawater (2) may be provided in the internal space (102). The seawater (2) provided to the outside of the seawater tank (100) may freely enter the internal space (102) or flow out from the internal space (102). The seawater tank (100) may be composed of a floating structure that floats on the sea surface (1) and a net structure connected to the lower portion of the floating structure. The structure of the seawater tank (100) may be variously modified as a known structure.

[0061] The water temperature control system (200) can control the water temperature of the internal space (102). The water temperature control system (200) can improve the water temperature, dissolved oxygen content, pH, nutrient concentration, etc. of the internal space (102) by supplying deep water (DW) to the internal space (102).

[0062] The water temperature control system (200) may include a seawater pump (210), a seawater transfer line (220), a nozzle unit (240), a stirring unit (250), a sensing unit (260), a power panel (270), a power unit (280), and a control unit (290).

[0063] The seawater pump (210) may be connected to a seawater transport line (220). The seawater pump (210) may provide suction to the seawater transport line (220). The seawater pump (210) may provide suction to the seawater transport line (220) to draw up deep water (DW) and supply it to the internal space (102). The seawater pump (210) may draw up deep water (DW) by utilizing the downward pressure generated by the seawater (2). The seawater pump (210) may be designed to suit the characteristics of its use in a marine environment. For example, a material with excellent corrosion resistance, such as stainless steel, titanium, or a specially coated alloy material, may be used. This is to protect the seawater pump (210) from salt and corrosive substances contained in the seawater (2).

[0064] Deep water (DW) differs from surface water in that it has a lower temperature and higher density. Therefore, a pump with appropriate head and flow rate is required to operate it effectively. Seawater pumps (210) can be manufactured in the form of centrifugal pumps, propeller pumps, jet pumps, etc., and the appropriate type can be selected depending on the intended use and operating environment. Centrifugal pumps are widely used because they can provide relatively high flow rates, while propeller pumps are suitable for transporting large volumes of seawater (2) at low pressure. Jet pumps can be used to lift seawater (2) while minimizing external power.

[0065] The seawater transport line (220) may be connected to a seawater pump (210). The end of the seawater transport line (220) may be provided in the deep sea. The seawater (2) in the deep sea may be deep water (DW). The seawater transport line (220) may have a pipe shape through which the deep water (DW) may flow. The suction force of the seawater pump (210) may be provided within the seawater transport line (220). As a result, the deep water (DW) may be drawn up toward the internal space (102) of the seawater tank (100).

[0066] The seawater transfer line (220) may include a first transfer line (221) and a second transfer line (222). The first transfer line (221) and the second transfer line (222) may draw up deep water (DW) from different locations. For example, the end of the first transfer line (221) may be located at a first depth (D1) from the sea surface (1). That is, the first transfer line (221) is configured to transfer deep water (DW) from the first location. The end of the second transfer line (222) may be located at a second depth (D2) from the sea surface (1). That is, the second transfer line (222) is configured to transfer deep water (DW) from the second location. The first location and the second location may be different locations. For example, the first depth (D1) may be deeper than the second depth (D2). In other words, the second position may be higher than the first position.

[0067] The first transfer line (221) and the second transfer line (222) transfer deep water (DW) from different locations. This is because the temperatures of the deep water (DW) at the first and second locations are different. For example, since the first location corresponds to a deeper sea than the second location, the temperature of the deep water (DW) provided to the first location may be different from the temperature of the deep water (DW) provided to the second location. In addition to the temperature, the dissolved oxygen content, pH, and the types and amounts of nutrients of the deep water (DW) provided to the first and second locations may be different from each other. That is, by providing the first and second transfer lines (221, 222) respectively, the user can supply deep water (DW) with different conditions to the internal space (102) as needed. Additionally, the status information of the deep water (DW) at the first location and the status information of the deep water (DW) at the second location may be stored in advance as reference data in the control unit (290) described below.

[0068] In addition, a first valve (225) that determines whether deep water (DW) flows within the first transfer line (221) may be installed in the first transfer line (221). In addition, a first measuring means (223) that can measure the flow rate and the flow rate per unit time of deep water (DW) flowing through the first transfer line (221) may be installed in the first transfer line (221). The first measuring means (223) may be a flow rate / flow rate sensor. The flow rate / flow rate measured by the first measuring means (223) may be transmitted in real time to the control unit (290).

[0069] Similarly to the first transfer line (221), a second valve (226) that determines whether deep water (DW) flows may be installed in the second transfer line (222). In addition, a second measuring means (224) that can measure the flow rate and the flow rate per unit time of deep water (DW) flowing through the second transfer line (222) may be installed in the second transfer line (222). The second measuring means (224) may be a flow rate / flow rate sensor. The flow rate / flow rate measured by the second measuring means (224) may be transmitted in real time to the control unit (290).

[0070] In addition, the seawater transport line (220) may be arranged generally inclined due to the slope of the seabed topography (3). Generally, the seawater tank (100) is installed on the coast near the land, and when the seawater (2) is drawn up from the area directly below the seawater tank (100), the deep water (DW) suitable for temperature control may not be drawn up due to the seabed topography (3). Therefore, the seawater transport line (220) of the present invention may be arranged inclined downward, so as to be configured to draw up the deep water (DW) at a lower location.

[0071] The nozzle unit (240) can supply deep water (DW) drawn up by the seawater pump (210) to the internal space (102) of the seawater tank (100). The nozzle unit (240) can include a first nozzle (241) that supplies deep water (DW) to the internal space (102) from above the sea surface (1), and a second nozzle (242) that supplies deep water (DW) to the internal space (102) from below the sea surface (1). The first nozzle (241) and the second nozzle (242) can have different spraying methods for the deep water (DW). Specifically, the first nozzle (241) is configured to supply deep water (DW) in a spray manner as illustrated in FIG. 2, and the second nozzle (242) is configured to supply deep water (DW) in a stream manner (water stream manner) as illustrated in FIG. 3.

[0072] The first nozzle (241) sprays deep water (DW) from above the sea surface (1) into the internal space (102) provided by the seawater tank (100). This is to primarily block the temperature of the sea surface (1) from increasing due to sunlight. The deep water (DW) sprayed by the first nozzle (241) absorbs sunlight energy as it evaporates due to sunlight. In other words, the deep water (DW) sprayed above the sea surface (1) in a spray manner can function as a so-called thermal barrier. As the deep water (DW) is sprayed in a spray manner, the thermal barrier can be formed over a wider area.

[0073] In addition, the area below the sea surface (1) is the area where marine life actually thrives. Therefore, by directly supplying deep water (DW) below the sea surface (1) through the second nozzle (242), effective temperature control and oxygen and nutrient supply of the internal space (102) can be achieved. In addition, when the second nozzle (242) supplies deep water (DW) in a stream manner, the deep water (DW) is sprayed at a relatively high pressure, which allows the deep water (DW) to be supplied further than when the deep water (DW) is supplied in a spray manner.

[0074] Referring back to FIG. 1, the stirring unit (250) can stir the seawater (2) in the internal space (102). The stirring unit (250) generates a vortex in the internal space (102). The stirring unit (250) can be composed of a motor, a propeller connected to the motor, etc. The stirring unit (250) promotes mixing of deep water (DW) supplied to the internal space (102) and existing seawater (2), thereby allowing the water temperature in the internal space (102) to be maintained generally evenly. Meanwhile, the rotation speed of the stirring unit (250) can be set very slowly, such as about 5 to 10 RPM.

[0075] In addition, the stirring unit (250) is positioned below the second nozzle (242). The low-temperature deep water (DW) supplied by the first and second nozzles (241, 242) has a relatively higher density than the high-temperature surface water and thus naturally flows downward. In addition, the deep water (DW) flowing downward is mixed with the existing seawater (2) by the eddy current generated by the stirring unit (250). This allows the temperature of the internal space (102) to be relatively evenly controlled.

[0076] The sensing unit (260) monitors the environmental conditions of the internal space (102). The environmental conditions may include the temperature, dissolved oxygen content, pH, and fish movement of the seawater (2) in the internal space (102). However, the environmental conditions are not limited thereto, and may include various types of conditions that may affect marine products provided to the internal space (102).

[0077] The sensing unit (260) may include a temperature sensor (261), a dissolved oxygen sensor (262), a pH sensor (263), and a camera (264). The temperature sensor (261) measures the temperature of seawater (2) in the internal space (102). The dissolved oxygen sensor (262) measures the concentration of dissolved oxygen contained in the seawater (2) in the internal space (102). The pH sensor (263) measures the pH of the seawater (2). The camera (264) monitors the movement of marine aquatic products active in the internal space (102) in real time. Data on environmental conditions measured by the sensing unit (260) may be transmitted to the control unit (290) in real time. For example, data collected by a temperature sensor (261), a dissolved oxygen sensor (262), a pH sensor (263), and a camera (264) are transmitted in real time to a control unit (290), and the control unit (290) can monitor the environmental conditions of the internal space (102) in real time based on the transmitted data.

[0078] The power panel (270) may be a solar panel. The power panel (270) may convert solar energy to generate electricity. The electricity generated by the power panel (270) may be transmitted to a power unit (280) that may include a battery. The power panel (270) may be placed above the seawater tank (100) to prevent solar energy from being transmitted to the sea surface (1) of the internal space (102) and thereby increasing the water temperature within the seawater tank (100). However, the present invention is not limited thereto, and the power panel (270) may be placed around the seawater tank (100) rather than above it.

[0079] The power unit (280) is a device that stores power generated by the power panel (270), which is a solar panel, and is used to ensure a stable power supply. Since the amount of power generated by solar panels generally varies depending on the amount of sunlight, a storage device is required in case the generated power cannot be used immediately. To this end, the power unit (280) may include components such as a battery, a supercapacitor, and an energy management system (EMS). For example, if the power unit (280) includes a lithium-ion battery, it can store the power generated by the solar panel during the day and continuously supply power even at night or on cloudy days. Alternatively, it can be linked to a fuel cell to convert and use the stored power when necessary. In addition, the power unit (280) serves to supply power to the seawater pump (210), thereby helping to stably transport deep-sea water to the aquaculture farm. To maximize energy efficiency, an MPPT (Maximum Power Point Tracking) controller may be included to extract optimal power from the solar panel. Through this configuration, the power unit (280) can provide self-sufficient power without relying on an external power grid, and can contribute to creating an eco-friendly aquaculture environment.

[0080] The control unit (290) is a device that controls various components of the aquaculture facility (10) and is responsible for the overall operation of the system. In order for the user to effectively manage and control each component of the aquaculture facility (10), the control unit (290) may include an input device such as a processor, a keyboard, a mouse, a switch, and a display. Through the display, the user can visually monitor the status of the seawater pump (210), the seawater transfer line (220), the nozzle unit (240), the stirring unit (250), the sensing unit (260), the power panel (270), and the power unit (280), and can check the system operation status in real time. In addition, the control unit (290) can control the operation of the seawater transfer line (220), the nozzle unit (240), the stirring unit (250), the sensing unit (260), the power panel (270), and the power unit (280), and adjust the transmission and reception of signals and data between each component to ensure optimal operation.

[0081] The control unit (290) can be configured in various ways, and the hardware and software configurations can vary depending on specific requirements. For example, when implementing a simple automatic control system, the control unit (290) can be designed as an embedded system based on a microcontroller (MCU). In this case, it performs functions such as collecting sensor data and controlling the operation of the seawater pump (210), and can display basic status information using a small digital display or LED indicator.

[0082] Alternatively, if more sophisticated control and data analysis are required, the control unit (290) may be implemented as an industrial computer (IPC) or programmable logic controller (PLC)-based system. In this case, the data collected by the sensing unit (260) can be analyzed, an optimal operating strategy can be established, and the operation of the seawater pump (210) and nozzle unit (240) can be controlled in real time. Furthermore, a large touchscreen display may be included, allowing users to monitor the system and adjust settings through an intuitive graphical interface (GUI).

[0083] Additionally, if remote control functionality is required, the control unit (290) may be designed to exchange data with a cloud server, including an Internet connection. This allows users to remotely monitor the operating status of the aquaculture facility (10) using a smartphone or tablet, and change settings as needed.

[0084] In addition, the control unit (290) may include a machine learning model. The user may train the machine learning model using multiple learning data. For example, the user may acquire a plurality of sample data on changes in water temperature, dissolved oxygen content, and pH of the internal space (102) over time, and machine-learn the model of the control unit (290) using the acquired sample data. In this case, the learned model of the control unit (290) can predict future changes in the transmitted environmental conditions when the sensing unit (260) transmits the environmental conditions in real time. Therefore, it should be understood that the case where the environmental conditions fall outside the critical range in the environmental condition monitoring step (S1) described below also includes the case where the future environmental conditions predicted by the model of the control unit (290) fall outside the critical range.

[0085] Figure 4 is a graph schematically illustrating the pump output required according to the distance between the deep water and the pump when the pump draws up deep water.

[0086] Referring to FIGS. 1 and 4, in general, in order to lift up a fluid located below the pump using a pump, a higher pump output is required as the distance between the fluid and the pump increases. This can be confirmed through line 'A2' in FIG. 4. However, in the case of lifting up deep water (DW) to a seawater tank (100) using a seawater pump (210) connected to a seawater transport line (220), even if the distance between the deep water (DW) and the seawater pump (210) increases, the required output of the seawater pump (210) does not increase significantly. This can be confirmed through line 'A1' in FIG. 4. This is based on the downward pressure generated by the seawater (2). Due to the downward pressure generated by the seawater (2), a constant upward pressure is generated at the end of the seawater transport line (220) as a counterbalance to the downward pressure. The downward pressure generated by seawater (2) increases as the distance from the sea surface (1) increases. That is, the seawater pump (210) of the present invention utilizes the downward pressure generated by seawater (2). Even if the location of the deep water (DW) that the seawater pump (210) intends to draw up is further from the sea surface (1), the output of the seawater pump (210) does not need to be significantly increased due to the downward pressure generated by the seawater (2) and the upward pressure applied to the end of the seawater transport line (220). Accordingly, the aquaculture facility (10) of the present invention can draw up deep water (DW) provided at a very deep location by utilizing this principle.

[0087] Figure 5 is a graph schematically illustrating an example of the power generation rate generated by a solar panel and the pump output control according to the rate.

[0088] Referring to FIGS. 1 and 5, the control unit (290) can control the output of the seawater pump (210). The control unit (290) can control the amount of deep water (DW) supplied to the internal space (102) per unit time by controlling the output of the seawater pump (210). Specifically, the control unit (290) can control the output of the seawater pump (210) based on the power generated by the power panel (270). For example, the output of the seawater pump (210) can be controlled in proportion to the power generation speed generated by the power panel (270). When the generation speed of the power generated from the power panel (270) increases from the first speed (C11) at the first time point (t11) to the second speed (C12) at the second time point (t12), the control unit (290) can estimate that the amount of sunlight irradiated on the seawater tank (100) has increased.

[0089] In this case, the control unit (290) can increase the output of the seawater pump (210) from the first output (P11) to the second output (P12) in proportion to the power generation speed. The power generation speed can be calculated based on the speed at which power is charged in the power unit (280), or the intensity of the current transmitted from the power panel (270) to the power unit (280). In addition, the output of the seawater pump (210) can be controlled in synchronization with changes in the power generation speed.

[0090] Figures 6 and 7 are graphs schematically illustrating another example of the power generation rate generated by a solar panel and the pump output control according to the rate.

[0091] Referring to FIGS. 1, 6, and 7, the control unit (290) can increase the output of the pump in proportion to the amount of power generated by the solar panel. For example, the amount of power generated is calculated by integrating the change in the power generation rate during the set time from the third time point (t21) to the fourth time point (t22). If the calculated amount of power generated is large, the output of the seawater pump (210) can be greatly increased, and if the calculated amount of power generated is small, the output of the seawater pump (210) can be slightly increased. For example, if the amount of power generated during the set time is the first amount of power generated (R1), the output of the pump can be increased from the third output (P21) to the fourth output (P22). In contrast, if the amount of power generated during the set time is a second amount (R2) that is greater than the first amount (R1), the output of the pump can be increased from the third output (P21) to a fifth output (P23) that is greater than the fourth output (P22).

[0092] That is, the output of the seawater pump (210) can increase in proportion to the amount of power generated by the power panel (270). In addition, when the generation speed of the power generated by the power panel (270) changes, the control unit (290) can monitor the change in the power generation speed of the power panel (270) for a set period of time, rather than immediately reflecting this in the output control of the seawater pump (210). Then, the amount of power generated can be calculated from the power generation speed monitored for the set period of time, and the output of the seawater pump (210) can be changed based on this.

[0093] In addition, even if sunlight is irradiated onto the sea surface (1), it may take a certain amount of time for the temperature of the seawater (2) in the internal space (102) to increase. Therefore, the control unit (290) may monitor the power generation speed for a set period of time and then change the output of the seawater pump (210) rather than immediately changing the output of the seawater pump (210), which may be more effective in controlling the water temperature in the internal space (102) relatively evenly.

[0094] Figure 8 is a flow chart for explaining a water temperature control method according to one embodiment of the present invention.

[0095] Referring to FIGS. 1 and 8, a water temperature control method according to an embodiment of the present invention may include an environmental condition monitoring step (S1), a transport line selection step (S2), a pump control condition calculation step (S3), a deep water transport step (S4), and an environmental condition judgment step (S5).

[0096] In the environmental condition monitoring step (S1), the sensing units (260) monitor the environmental conditions of the internal space (102). As described above, the environmental conditions may be data regarding the water temperature, dissolved oxygen content, pH, and movement of marine products (e.g., fish) of the internal space (102). The control unit (290) monitors the environmental conditions measured by the sensing units (260), and if the monitored environmental conditions fall outside a preset threshold range, the transport line selection step (S2) may be performed.

[0097] The critical range may be a pH of approximately 6.5 to 8.5, a water temperature of approximately 2 to 6 degrees Celsius lower than the surrounding temperature of the seawater tank (100), and a dissolved oxygen concentration of approximately 5 to 8 mg / L (ppm). However, the critical range is not limited thereto, and may vary depending on the type of aquatic product the user wishes to produce, the region where the aquaculture facility (10) is installed, etc.

[0098] The transfer line selection step (S2) may be selected based on the above environmental conditions. For example, when the water temperature of the internal space (102) is relatively high, the first transfer line (221) may be selected among the first transfer line (221) and the second transfer line (222). By drawing up deep water (DW) having a lower temperature, the water temperature of the internal space (102) can be effectively controlled. In addition, when the water temperature of the internal space (102) increases relatively quickly, the second transfer line (222) may be selected among the first transfer line (221) and the second transfer line (222). By drawing up deep water (DW) at a closer location, the water temperature of the internal space (102) can be quickly controlled. In some cases, the transfer line selection step (S2) may be omitted. For example, if the seawater transport line (220) includes only one transport line, the transport line selection step (S2) may be omitted.

[0099] In the pump control condition calculation step (S3), the control condition of the seawater pump (210) is calculated. The control condition estimates the amount and temperature of deep water (DW) required for the environmental condition to fall within the critical range when the environmental condition monitored in the environmental condition monitoring step (S1) falls outside the critical range. The control unit (290) may have reference data stored in advance for the estimation. For example, the control unit (290) may have data stored in advance for the change in the water temperature of the internal space (102) when deep water (DW) at temperature A is supplied in an amount of C for a period of time B. Based on this reference data, the control unit (290) may calculate the amount and temperature of deep water (DW) required for the environmental condition to fall within the critical range. In addition, the control unit may calculate the control condition of the seawater pump (210) that draws deep water (DW) into the internal space (102) based on the calculated amount and temperature of deep water (DW). The control conditions may be the output of the seawater pump (210) and the time for which the output is maintained.

[0100] In addition, in the pump control condition calculation step (S3), the control condition of the seawater pump (210) can be calculated by considering the upward pressure applied to the end of the seawater transport line (220) by the downward pressure of the seawater (2). Considering the upward pressure means considering the upward pressure applied to the end of the seawater transport line (220) as a countermeasure to the downward pressure of the seawater (2). Considering the upward pressure, the output of the seawater pump (210) is adjusted. The output of the seawater pump (210) may be set somewhat lower than the original demand. If the output of the seawater pump (210) is controlled without considering the upward pressure described above, an unnecessary overload may occur in the seawater pump (210), and it may be difficult to draw up a desired amount of deep water (DW). Since marine products such as fish are provided in the internal space (102), an excessively low temperature of the internal space (102) may have a negative effect on the marine products. However, by setting the control conditions of the seawater pump (210) in consideration of the upward pressure as described above, the occurrence of the above-described problem can be minimized. In addition, the control unit (290) may store in advance as reference data information regarding the output of the seawater pump (210) required to draw up the deep water (DW) at the D speed in consideration of the upward pressure due to the seawater (2).

[0101] In the deep water transport step (S4), a seawater pump (210) to which control conditions are applied transports deep water (DW) located below the internal space (102) to the internal space (102) through a seawater transport line (220). In the deep water transport step (S4), information on the flow rate and volume of deep water (DW) by measuring means (223, 224) can be transmitted in real time to a control unit (290), and the control unit (2900) can feedback control the seawater pump (210) based on the information.

[0102] In the environmental condition determination step (S5), after the deep water transport step (S4) is completed, it is checked whether the environmental conditions have entered the critical range described above. Through this, it is determined whether the internal space (102) of the seawater tank (100) has reached an environment suitable for marine products. If the environmental conditions have entered the critical range, the environmental condition monitoring step (S1) is performed again. If the environmental conditions have not entered the critical range, the transport line selection step (S2) or the pump control condition calculation step (S3) may be performed again.

[0103] In the above example, only one seawater pump (210) is provided, but the present invention is not limited thereto. For example, as illustrated in FIG. 9, the seawater pump (210) may be provided with a first seawater pump (211) and a second seawater pump (212). The first seawater pump (211) may be connected to a first transfer line (221), and the second seawater pump (212) may be connected to a second transfer line (222). Through this, the water temperature control system (200) may draw up either the deep water (DW) of the first location or the deep water (DW) of the second location, or both. In addition, by combining the control conditions of the first and second seawater pumps (211, 212), the environmental conditions of the internal space (102) may be effectively controlled.

[0104] In the above example, only one first nozzle (241) is provided, but this is not limiting. For example, as illustrated in Fig. 10, a plurality of first nozzles (241) may be provided.

[0105] In the above example, only one second nozzle (242) is provided, but the present invention is not limited thereto. For example, as illustrated in FIG. 11, a plurality of second nozzles (242) may be provided. For example, the second nozzle (242) may include a 2-1 nozzle (242a), a 2-2 nozzle (242b), a 2-3 nozzle (242c), and a 2-4 nozzle (242d). At this time, the direction in which the second nozzles (242) supply the deep water (DW) may be different from each other when viewed from above so that a vortex may be generated in the internal space (102) by the deep water (DW) supplied by the second nozzles (242). For example, the 2-1 nozzle (242a) may be in the first direction, the 2-2 nozzle (242b) may be in the second direction, and so on.

[0106] In the above-described example, it has been described that only one first nozzle (241) is provided or that multiple first nozzles (241) are provided, but the present invention is not limited thereto. For example, as illustrated in FIG. 12, multiple first nozzles (241) may be provided. In addition, when viewed from above, the first nozzle (241), which is the 1-1 nozzle (241a) located at the edge region of the internal space (102), can supply the deep water (DW) drawn up by the first seawater pump (211) described above, and the first nozzle (241) located at the center region of the internal space (102), which is the 1-2 nozzle (241b), can supply the deep water (DW) drawn up by the second seawater pump (212) described above.

[0107] That is, in the embodiment illustrated in FIG. 12, deep water (DW) having a relatively low temperature may be supplied to the edge of the internal space (102), and deep water (DW) having a relatively high temperature may be supplied to the central region of the internal space (102). This is because the external seawater (2) of the seawater tank (100) has a high temperature, and thus the edge of the internal space (102) may have a relatively high temperature. Accordingly, the present invention may supply deep water (DW) drawn up from a first position by a first seawater pump (211) to the edge region of the internal space (102), and supply deep water (DW) drawn up from a second position higher than the first position by a second seawater pump (212) to the central region of the internal space (102).

[0108] Although not shown in Fig. 12, the second nozzle (242) may also be arranged in a similar form to the first nozzle (241). In addition, when viewed from above, the second nozzle (242) located at the edge region of the internal space (102) may be connected to the first seawater pump (211), and the second nozzle (242) located at the center region may be connected to the second seawater pump (212).

[0109] FIGS. 13 and 14 are drawings showing a water temperature control system according to one embodiment of the present invention and a marine aquaculture facility including the same when installed in a different area from FIG. 1.

[0110] As illustrated in Fig. 13, the aquaculture facility (10) may, in some cases, be installed on the west coast of Korea, where the seabed depth is relatively shallow. In this case, deep water (DW) may need to be drawn from a location very far away from the seawater tank (100). In such a case, in order to more actively utilize the downward pressure generated by the aforementioned seawater (2), the seawater pump (210) may be driven at a time when high tide occurs, when the sea surface (1) rises from the first height (H1) to the second height (H2), as illustrated in Fig. 14.

[0111] In the above example, solar energy was used as an example to drive the seawater pump (210), but the present invention is not limited thereto. For example, wind power generation or an external power source provided outside the aquaculture facility (10) may be used to drive the seawater pump (210).

[0112] Although the above-described example illustrates the case where deep water (DW) is supplied to a single seawater tank (100), the present invention is not limited thereto. For example, if the internal space (102) of the seawater tank (100) is divided into multiple zones, deep water (DW) may be supplied to a selected zone among the divided zones.

[0113] In the above example, the supply of deep water (DW) is controlled based on the environmental conditions sensed by the sensing unit (260), but the present invention is not limited thereto. For example, the nozzles that spray deep water (DW) may be different depending on the time zone. For example, between 12 and 18 o'clock when there is a lot of sunlight, the first and second nozzles (241, 242) or only the first nozzle (241) may spray deep water (DW), and between 18 and 06 o'clock, only the second nozzle (242) may spray deep water (DW). This reflects the fact that the amount of sunlight irradiated on the sea surface (1) varies depending on the time.

[0114] In the above example, the seawater pump (210) provides suction power to the seawater transfer line (220). However, if necessary, the seawater pump (210) may also provide discharge power to the seawater transfer line (220). For example, a filtering member may be installed at the end of the seawater transfer line (220) to filter impurities contained in the seawater (2). The filtering member may be provided in the form of a mesh net or a physical / chemical filter. If the seawater pump (210) only provides suction power to the seawater transfer line (220), impurities may accumulate in the filtering member. Therefore, the seawater pump (210) may provide discharge power to the seawater transfer line (220) to separate impurities that may accumulate in the filtering member from the filtering member.

[0115] The seawater pump (210) can provide discharge power after the seawater pump (210) provides suction power for a set period of time. The set period of time can be preset by the user through the control unit (290).

[0116] The present invention can increase the productivity of aquaculture facilities (10) by artificially upwelling deep water (DW) in marine aquaculture, thereby maintaining the appropriate temperature, dissolved oxygen content, and appropriate pH of the sea surface (1) due to climate change, supplying oxygen by generating appropriate water currents, and reducing damage from toxic substances. In addition, deep water (DW) contains a variety of minerals necessary for growth, such as calcium (Ca), magnesium (Mg), iron (Fe), and zinc (Ze). In particular, deep water (DW) has a high concentration of nutrients, such as nitrates, phosphates, and silicates, as it is not exposed to sunlight and has a low temperature, so no organisms can survive there. In addition, it does not mix with polluted surface seawater due to the difference in density, so it does not contain pollutants. Therefore, it has the advantage of being safe at low and high temperatures, and being located at a depth, it has the advantage of being clean and not easily polluted by terrestrial river water or the atmosphere. In other words, the aquaculture facility of the present invention can actively utilize deep water (DW) to greatly improve the production efficiency of marine aquatic products.

[0117] Furthermore, the present invention can effectively drive a seawater pump (210) by utilizing not only general electricity but also solar power, a renewable energy source, when drawing up deep seawater (DW). Furthermore, by controlling the seawater pump (210) based on the power generation rate and / or power amount generated by solar power generation, the temperature of the seawater (2) can be effectively controlled.

[0118] It should be understood that exemplary embodiments have been disclosed herein, and that other variations are possible. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, may be interchangeable and used in a selected embodiment, even if not specifically illustrated or described. Such variations should not be considered a departure from the spirit and scope of the present disclosure, and all such modifications apparent to those skilled in the art are intended to be included within the scope of the following claims.

[0119] [Explanation of symbols]

[0120] Sea level: 1

[0121] Seawater: 2

[0122] Underwater topography: 3

[0123] Depth 1: D1

[0124] Second depth: D2

[0125] Formwork facilities: 10

[0126] Seawater tank: 100

[0127] Interior space: 102

[0128] Water temperature control system: 200

[0129] Seawater pump: 210

[0130] Seawater pump number 1: 211

[0131] Second seawater pump: 212

[0132] Seawater transfer line: 220

[0133] First transfer line: 221

[0134] Second transfer line: 222

[0135] First measuring instrument: 223

[0136] Second measuring instrument: 224

[0137] Valve 1: 225

[0138] Second valve: 226

[0139] Nozzle Unit: 240

[0140] Nozzle 1: 241

[0141] Nozzle 2: 242

[0142] Stirring unit: 250

[0143] Sensing units: 260

[0144] Temperature sensor: 261

[0145] Dissolved oxygen sensor: 262

[0146] pH sensor: 263

[0147] Camera: 264

[0148] Power panel: 270

[0149] Power Units: 280

[0150] Control unit: 290

Claims

1. In a water temperature control system that controls the temperature of the internal space provided by the seawater tank using deep water, A sensing unit that monitors the environmental conditions of the internal space; A seawater transport line having a section positioned at a location where the deep water is provided; A pump that provides suction to the seawater transport line and draws up the deep water into the internal space by utilizing the downward pressure formed by the seawater; and including a control unit that controls the above pump, The above control unit, A water temperature control system that controls the output of the pump based on the environmental conditions monitored by the sensing unit.

2. In paragraph 1, The above sensing unit, A water temperature control system comprising at least one of a temperature sensor for measuring the temperature of the internal space, a dissolved oxygen sensor for measuring dissolved oxygen of the internal space, a pH sensor for measuring the pH of the internal space, and a camera for monitoring the movement of fish in the internal space.

3. In paragraph 2, The above control unit, A water temperature control system that controls the pump to draw the deep water into the internal space when the temperature, dissolved oxygen, pH, and fish movement exceed a preset threshold range.

4. In paragraph 1, The above water temperature control system, Solar panels that convert solar energy into electricity; and A water temperature control system including a power unit that stores power generated by the solar panel and supplies the power to the pump.

5. In paragraph 4, The above control unit, A water temperature control system that controls the output of the pump based on the power generated by the solar panel.

6. In paragraph 5, The above control unit, A water temperature control system that increases the output of the pump in proportion to the rate at which the power generated by the solar panel is generated.

7. In paragraph 5, The above control unit, A water temperature control system that increases the output of the pump in proportion to the amount of power generated by the solar panel.

8. In paragraph 5, The above control unit, A water temperature control system that changes the output of the pump after a set time has elapsed after the generation rate of the power generated by the solar panel has changed.

9. In paragraph 8, The above control unit, A water temperature control system that calculates the amount of power generated during the above-described set time and changes the output of the pump based on the calculated amount of power generated.

10. In paragraph 9, The above control unit, If the amount of power generated during the above-mentioned set time is the first amount of power generated, the output of the pump is changed from the first output to the second output, A water temperature control system that changes the power from the first output to a third output that is greater than the second output when the amount of power generated during the set time is a second output that is greater than the first output.

11. In paragraph 1, The above water temperature control system, Further comprising a nozzle unit that supplies the deep water drawn up by the pump to the internal space, The above nozzle unit, A first nozzle for supplying the deep water to the internal space above the sea surface; and A water temperature control system including a second nozzle for supplying the deep water to the internal space below the sea surface.

12. In paragraph 11, A water temperature control system in which the spraying methods of the first nozzle and the second nozzle are different from each other.

13. In paragraph 12, The above first nozzle is configured to supply the deep water in a spray manner, The above second nozzle is a water temperature control system configured to supply the deep water in a stream manner.

14. In paragraph 11, A water temperature control system in which the first nozzle and the second nozzle are provided in plurality.

15. In paragraph 14, A temperature control system in which the second nozzles spray the deep water in different directions when viewed from above.

16. In paragraph 11, The constant water temperature control system is A water temperature control system further comprising a stirring unit disposed in the internal space, positioned below the second nozzle, and stirring the seawater in the internal space.

17. In paragraph 11, The above seawater transport line, A first transport line transporting the deep water of the first location; and Including a second transport line for transporting the deep water to a second position higher than the first position, The above control unit, A water temperature control system that controls the pump and the seawater transport line to draw up the deep water through a line selected from the first transport line and the second transport line, according to the environmental conditions measured by the sensing unit.

18. In paragraph 17, The above pump, A first pump connected to the first transfer line; and Including a second pump connected to the second transport line, The above nozzle unit, The first nozzle and the second nozzle are provided in plurality, A water temperature control system in which, when viewed from above, the first nozzle and the second nozzle located in the edge region of the internal space are configured to supply the deep water drawn up by the first pump, and the nozzle and the second nozzle located in the central region of the internal space are configured to supply the deep water drawn up by the second pump.

19. In paragraph 1, The above control unit, A water temperature control system that controls the seawater pump to provide a discharge force to the seawater transport line after the seawater pump provides the suction force to the seawater transport line for a set period of time.

20. In paragraph 19, A water temperature control system in which a filtering member for filtering impurities flowing into the seawater transport line is installed at the end of the seawater transport line.

21. A water temperature control system according to any one of paragraphs 1 to 20; and Aquaculture facility including the above seawater tank.

22. A water temperature control method for controlling the water temperature of an internal space of an aquaculture facility using deep water, An environmental condition monitoring step for monitoring environmental conditions of the internal space, wherein the environmental conditions include at least one of temperature, dissolved oxygen content, pH, and movement of fish in the internal space; A pump control condition calculation step for estimating the amount and temperature of the deep water required for the environmental condition to fall within the critical range when the environmental condition falls outside the critical range, and calculating the control conditions of the pump for drawing the deep water into the internal space based on the estimated amount and temperature of the deep water; A deep water transport step in which the pump to which the above control conditions are applied transports the deep water located below the internal space to the internal space through a seawater transport line; and After the deep water transport step, an environmental condition judgment step is included to re-measure the environmental conditions of the internal space and determine whether the environmental conditions are within the critical range. A water temperature control method for calculating the control conditions of the pump by taking into account the upward pressure applied to the seawater transport line by the downward pressure of the seawater in the above pump control condition calculation step.

Images