JPH0799862A - Deepwater and surface water temperature control system for marine organism production - Google Patents

Abstract

(57) [Abstract] [Purpose] To maintain the cleanliness of deep water and to heat deep water, and to significantly reduce the energy consumption required for heating deep water and cooling surface water. [Structure] A deep sea water supplied through a diversion type three-way valve 9 and a heat exchanger 10 for supplying surface water having a temperature higher than the temperature of the deep water, and the surface water temperature on the outlet side of the heat exchanger are detected. Temperature control means 12 for controlling the valve opening of the three-way valve 9 on the basis of the detection value from the temperature detection means 11 for controlling the flow rate of the deep layer water to the heat exchanger 10, and preheating from the heat exchanger 10. A heat pump 13 including a condenser 14 for supplying deep water and an evaporator 15 for branching and supplying a part of surface water.
And a starting means 16 for starting and controlling the heat pump 13 on the basis of a detection signal from a temperature detecting means 18 for detecting the water temperature of the deep water on the condenser outlet side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water temperature control system for heating deep-sea water for producing marine organisms and cooling surface water.

[0002]

2. Description of the Related Art Recently, research and experiments relating to cultivation and fisheries of marine and marine resources such as seafood that live in the ocean have become popular. Along with this, research and experiments on a commercial production scale in aquaculture, seedling production, and other cultivation and fisheries,
An artificial production method using a breeding aquarium that uses a large amount of seawater tends to be adopted.

By the way, in an artificial production facility for marine organisms such as fish, the surface water is heated by a boiler in winter in order to eliminate temperature fluctuations due to seasonal changes in the water temperature when only the sea surface water is taken and raised. However, in the summer, it is cooled by a refrigerator and maintained at a predetermined water temperature.

On the other hand, the deep sea water taken in is clean, rich in inorganic nutrients, and has a stable low water temperature throughout the year. Therefore, it is used for the breeding of boreal and deep-sea fish and the growth of seaweed. When used as production water for water, it is mixed with surface water in the summer and heated to a water temperature suitable for growth of these fish and the like.

[0005]

In the case of producing marine organisms using only surface water, the amount of water used is large, so the energy cost of the water temperature control system using a boiler or refrigerator is enormous. In addition, since the energy cost required for cooling is particularly large, cooling is not actually performed, and thus death of captive organisms due to a rise in water temperature in the summer is a serious problem. For this reason, there has been a demand for the development of a water temperature control system which is low in energy cost and excellent in economic efficiency.

Further, since the control of the water temperature of the deep water is a method of adjusting the mixing of the deep water and the surface water, the mixing ratio of the deep water and the surface water changes depending on the season, which impairs the cleanliness of the deep water. In addition, there is a problem that nutrients contained in deep water are also diluted, so experimental research and
In the production of algae, the use of deep water alone is an essential requirement, and therefore a method for controlling the temperature of deep water that does not mix deep water and surface water has been required. Further, cooling by a refrigerator is conceivable, but it has the same problem that the energy cost is large.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to collect deep water taken from
Marine organism production that can heat the deep water itself without impairing its cleanliness and change its water quality, and can significantly reduce the energy consumption required for heating deep water and cooling surface water. Providing a deep-sea water and surface water temperature control system for water.

A further object of the present invention is to use the cooled surface water discharged from the heat exchanger and the evaporator of the heat pump as marine water for the production of marine organisms.

[0009]

DISCLOSURE OF THE INVENTION The present invention is directed to a deep sea water supplied through a diversion type three-way valve and a heat exchanger to which surface water having a temperature higher than the temperature of the deep sea water is sent, and a heat exchanger. Temperature control means that controls the valve opening of the three-way valve based on the detection value from the temperature detection means that detects the surface water temperature of the outlet side, and controls the flow rate of deep water to the heat exchanger, and heat exchange From the heat pump equipped with a condenser that feeds preheated deep water from the vessel, and an evaporator that branches and feeds part of the surface water, and from the temperature detection means that detects the water temperature of the deep water on the condenser outlet side. And a starting means for controlling the start of the heat pump on the basis of the detection signal.

Further, according to the present invention, the cooled surface water discharged from the heat exchanger and the evaporator of the heat pump is used as marine water for producing marine organisms.

[0011]

[Function] The deep water thus taken and the surface water are sent to the heat exchanger, and the heat of the surface water is given to the deep water for heat exchange.
Then, the surface water temperature on the outlet side of the heat exchanger is detected, and this is input to the temperature adjusting means to control the valve opening of the three-way valve to control the flow rate of the water supplied to the heat exchanger of the deep water, The water temperature of is cooled to a predetermined temperature.

Further, the preheated deep layer water which is supplied with heat from the surface layer water and is delivered from the heat exchanger is delivered to the condenser of the heat pump. Then, the temperature of the deep water on the outlet side of the condenser is detected,
The activation means controls activation of the heat pump based on the detected temperature, whereby the deep water is heated by the condenser. Furthermore, a part of the surface water thus taken in is branched and supplied to the evaporator of the heat pump for cooling.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below based on the embodiments shown in the accompanying drawings. FIG. 1 is a block diagram showing an embodiment of a water temperature control system of the present invention,
The low-temperature deep sea water that has been taken in is supplied via a water supply pipe 1 to a water supply pipe 2 to a heat exchanger 10 and a diversion pipe 3 that diverts the water from the heat exchanger 10 to a condenser 14 of a heat pump 13. While being connected, the valve opening degree is controlled by a control signal from a temperature controller 12 described later, and water is supplied to a diversion type three-way valve 9 that controls the flow rate of deep water supplied to the heat exchanger 10.

On the other hand, surface water having a temperature higher than that of the deep water is supplied to a known plate heat exchanger 10, for example, through a water supply pipe 5, where heat of the surface water is transferred to a deep water through a plate (not shown). The heat is transferred to the surface water, which cools the surface water. A temperature sensor 11 that detects the water temperature of the surface water after heat exchange is provided on the surface water outlet side pipe of the heat exchanger 10. The temperature controller 12 to which the detection signal of the temperature sensor 11 is input via the signal transmission line 12A is balanced based on the value of the temperature detection signal, and the balanced signal is used as a control signal via the control signal transmission line 12B. Excitation coil 9A of the three-way valve 9
To a part of the deep water to be supplied by controlling the valve opening degree, and divert it to the water supply pipe 4 to the condenser via the diversion pipe 3.
This is a well-known proportional operation type electronic temperature controller that controls the flow rate of the deep layer water supplied to the heat exchanger 10 so that the surface water temperature becomes a predetermined temperature.

Compressor 17, condenser 14, and evaporator 15
A water supply pipe 4 for supplying preheated deep layer water from the heat exchanger 10 is connected to the condenser 14 of the heat pump 13 including the heat pump 13, and the evaporator 15 is provided on the upstream side of the surface water supply pipe 5. The surface water branch pipe 6 is connected. Then, on the outlet side of the condenser 14, during operation of the heat pump 13, deep water further heated by heat exchange with the high-temperature vaporized refrigerant is temporarily stored through the water supply pipe 7 and illustrated. A buffer tank 8 for stable water supply to a water tank that is not connected is connected. The buffer tank 8 is provided with a temperature sensor 18 for detecting the water temperature of the deep sea water, and the detected temperature is input to a well-known thermostat type two-position type temperature controller 16 via a signal transmission line 16A. When the input detection signal reaches a predetermined value, the temperature controller 16 closes a switch by heating displacement of a bimetal (not shown), thereby operating as a starting means for starting the heat pump 13. Further, from the outlet side of the evaporator 15, the surface water supplied from the branch pipe 6 is discharged toward the water tank (not shown) by cooling the surface water cooled by heat exchange with the liquefied refrigerant. In addition, reference symbols T and F in the figure indicate a thermometer and a flow meter for monitoring.

The operation of the water temperature control system of the present invention having the above-described structure is performed by the flowchart for executing the operation mode 1 for cooling only the surface water shown in FIG. 2, the heating of the deep water shown in FIG. 3, and the surface water. This will be described with reference to the flow chart of the operation mode 2 for cooling.

In the operation mode 1 of FIG. 2, the surface water taken in is sent to the heat exchanger 10 through the pipe 5, and the deep water having a temperature lower than the temperature of the surface water is passed through the pipe 1 and the three-way valve 9. Water is sent to the heat exchanger 10 (step S1). Heat exchanger 10
Then, heat is applied to the deep layer water to cool the surface layer water, the outlet side water temperature is detected by the temperature sensor 11, and the detection signal is input to the temperature controller 12 via the signal transmission line 12A.
Whether the water temperature is high or low is discriminated (step S2), and if the water temperature is high, the valve opening degree is controlled so as to reduce the partial flow rate from the three-way valve 9 to the flow dividing pipe 3 to increase the flow rate of water supplied to the heat exchanger 10 ( If the water temperature is low in step S3), the valve opening degree is controlled so as to increase the partial flow rate to the diversion pipe 3 and decrease the water flow rate to the heat exchanger 10 (step S4), and the water is cooled to a predetermined water temperature. Surface water is supplied to a water tank (not shown) (step S5). Then, the deep water preheated by the water temperature of the surface water in the heat exchanger 10 is stored in the buffer tank 8 via the condenser 14 of the stopped heat pump 13,
It is discharged to the outside as waste water (step S6). In addition,
It goes without saying that the preheated deep sea water discharged from the buffer tank 8 can be used as production water.

Next, in the operation mode 2 of FIG. 3, the surface water taken in is sent to the heat exchanger 10 via the pipe 5 and to the evaporator 15 of the heat pump 13 via the branch pipe 6. Further, the deep layer water is sent to the heat exchanger 10 via the pipe 1 and the three-way valve 9. And the heat exchanger 1
The detection signal of the temperature sensor 11 which has detected the water temperature on the surface water outlet side of 0 is input to the temperature controller 12, and the valve opening of the three-way valve 9 is controlled to control the flow rate of water to be sent to the heat exchanger 10, Discharge surface water cooled to the water temperature and heat exchanger 1
The deep water preheated from 0 is sent to the condenser 14. These steps are the same as steps S1 to S6 performed in the operation mode 1 described above, and thus detailed description thereof will be omitted.

The preheated deep-water supplied with the heat of the surface water in the heat exchanger 10 is stored in the buffer tank 8 through the pipe 4 and the condenser 14 of the heat pump 13 which is stopped, and the water temperature thereof is kept. The detected temperature detection signal from the temperature sensor 18 is input to the two-position temperature controller 16 via the signal transmission line 16A. If the value of the detection signal from the temperature sensor 18 is less than or equal to the set value (step S7), the compressor 17 is driven by the start signal output from the temperature controller 16, and the heat pump 13 starts operating. (Step S8). In the condenser 14, the preheated deep-water supplied by heat exchange with the vaporized refrigerant is further heated (step S9), and the heated deep-water is stored in the buffer tank 8 through the pipe 7 and is not shown here. Water is supplied to the aquarium for deep water. The surface water supplied through the branch pipe 6 is sent to the evaporator 15 of the heat pump 13,
The surface water cooled by the heat of vaporization of the liquefied refrigerant is discharged to the outside as waste water (step S10). Needless to say, the cooling surface water discharged from the evaporator 15 described above can be used as production water.

According to the water temperature control system of this embodiment, since the surface water temperature changes throughout the year, the heat exchanger 10 is used when the surface water and deep water are used as water for producing marine organisms. The surface water and the deep water supplied from the heat exchanger 10 in the operation mode 1 are used for a sufficient period of time at the water temperature level of the cooled surface water sent from the preheated deep water and the preheated deep water. Heat exchanger 1
When the cooling surface water from 0 and the preheating deep water have insufficient water temperature levels, the operation mode 2 is automatically switched to drive the heat pump 13 to cool the cooling surface water discharged from the evaporator 15 and the condensed water. The heated deep water discharged from the vessel can be used.

Therefore, the heat exchanger and the heat pump are selectively used, or both of them are used in combination, depending on the seasonal fluctuation of the surface water of the surface water to be taken and the set water temperatures of the deep water and the surface water. , Reduce energy consumption as much as possible,
The water temperature can be controlled so that surface water and deep water having the set water temperature level can be obtained.

FIG. 4A shows that in the production process of marine organisms, the water temperature levels of deep water and surface water supplied to a tank for marine organism production (not shown) are both 15 ° C.,
When a temperature level of 18 ° C or 23 ° C is required, the water temperature control according to the present invention is made in consideration of the annual water temperature fluctuation record result of the surface water measured by the Kochi Deep Sea Water Research Institute and the deep water. It shows a table of the operating method of the system, in which the dotted line shows the driving of the heat pump and the solid line shows the use of the heat exchanger.

The table shows that the use of the heat exchanger alone is sufficient throughout the year when both the deep water and the surface water require a temperature level of 15 ° C. In addition, when both deep water and surface water require a temperature level of 18 ° C.
Heat exchangers are used from January to mid-April to December for surface water, and heat pumps are driven from January to May and December for deep water, For water, drive from January to mid-April. Further, when both deep water and surface water require a temperature level of 23 ° C, both deep water from August to mid-September and surface water from July to October both heat exchangers. And the heat pump is 1 for deep water.
Drives from the months to July, and from mid-September to December, for surface water from January to June, and November, 1
Drive during the February period. From this, it is understood that according to the water temperature control system of the present embodiment, the deep water and the surface water can be appropriately heated by the heat exchanger alone or by using the heat exchanger and the heat pump together.

FIG. 4B shows the system of this embodiment required for water temperature control, heating by a boiler, and a refrigerator, assuming that water temperature control is performed under the temperature level conditions shown in FIG. 4A. A graph showing a comparison of energy consumption required for heating or cooling per unit amount of water with a conventional system for cooling is shown. The shaded area indicates the energy consumption by the conventional system, and the black background area indicates the energy consumption by the system of this embodiment. Indicates. From this graph, the energy consumption of both systems is the same in January, but the energy consumption of this embodiment in February to July and October to December is much smaller than that of the prior art. Moreover, it can be seen that the difference is remarkable in August and September. From this, it is predicted that the energy consumption of the water temperature control system according to the present embodiment will be approximately one half or less that of the conventional system.

[0025]

As described above, according to the present invention, the deep water and the surface water having a temperature higher than that of the deep water are sent to the heat exchanger, and the outlet side water temperature after the heat exchange is detected. Based on this detection value, the flow rate of deep water from the three-way valve to the heat exchanger is controlled to discharge the surface water that has been cooled to a predetermined water temperature, while part of the surface water is branched and the heat pump In addition to sending water to the evaporator, the preheated deep water after heat exchange is sent to the condenser of the heat pump, the temperature of the deep water on the outlet side of the condenser is detected, and the heat pump is started according to the detected value to condense. Since it is configured to obtain the deep water heated from the vessel and the surface water cooled from the evaporator, not only the cooled surface water but also the heated deep water is obtained as production water separately. You can Moreover, since it is a method of sending deep water to a heat exchanger or a condenser to heat it, it does not impair the cleanliness of the deep water itself, and obtains deep water without changing the water quality. You can

Further, depending on the seasonal change of the surface water temperature and the set temperature of the surface water and the deep water, the operation mode is switched to the operation mode in which only the heat exchanger that does not require any driving energy is operated, or the heat exchange is performed. It is possible to obtain surface water and deep water with the set water temperature level by selectively operating the heat exchanger and the heat pump, or switching to the operation mode by the combined operation, so the energy consumption required for cooling and heating is greatly reduced. Can be reduced to.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a water temperature control system of the present invention.

FIG. 2 is a flowchart for cooling only surface water in the operation mode 1 of the above embodiment.

FIG. 3 is a flowchart in which the surface water is cooled and the deep water is heated by setting the operation mode 2 in the above embodiment.

FIG. 4 (A) is a table showing an operating method for heating deep water and cooling surface water by driving a heat exchanger and a heat pump throughout the year, and FIG. 4 (B) is shown in FIG. 7 is a graph showing a comparison of energy consumption throughout the year required for cooling surface water and heating deep water under the temperature level condition shown in FIG.

[Explanation of symbols]

1 Deep water supply pipe, 2 Deep water supply pipe to heat exchanger, 3
Flow dividing pipe, 4 Pipes for supplying deep water from heat exchanger to condenser of heat pump, 5 Surface water feeding pipe, 6 Surface water feeding pipe for evaporator of heat pump, 9 Dividing type three-way valve equipped with exciting coil 9A, 10 Heat exchanger, 11 Temperature sensor for detecting water temperature on surface water outlet side, 12 Temperature controller for controlling valve opening of three-way valve, 13 Heat pump, 14 Condenser, 15 Evaporator, 16 Temperature controller for starting and controlling heat pump , 17 compressor, 8 buffer tank, 18
A temperature sensor that detects the temperature of heated deep water.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hitoshi Morino 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Construction Co., Ltd. Construction Co., Ltd.

Claims (2)

[Claims] 1. A deep sea water supplied through a diversion type three-way valve, a heat exchanger to which surface water having a temperature higher than the water temperature of the deep water is sent, and a water temperature of the surface water on the outlet side of the heat exchanger. Temperature control means for controlling the valve opening of the three-way valve based on the detected value from the temperature detection means for detecting the temperature control means for controlling the flow rate of the deep layer water to the heat exchanger, and the deep layer preheated from the heat exchanger. Based on a detection signal from a heat pump including a condenser to which water is fed, and an evaporator to which a portion of surface water is branched to be fed, and a temperature detection means for detecting the water temperature of the deep water on the outlet side of the condenser. And a starting means for starting and controlling the heat pump. A system for controlling the temperature of deep sea water for producing marine organisms, and surface water. 2. The cooled surface water discharged from the heat exchanger and the evaporator of the heat pump is used as marine water for marine organism production.
The deep-sea water and surface water temperature control system for production of marine organisms described.