JP2010207121A - Method and device for controlling temperature of fry-producing water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To be able to produce healthy fries and perform control for consuming little energy by reducing the required capacity of a device in the temperature control of fry-producing water for application of a statolith temperature-labeling, growth inhibition, or growth promotion. <P>SOLUTION: The method for controlling the temperature of fry-producing water includes branching a supplying flow passage 10 to which stock water is supplied, into two, making one of the supplying flow passages 10A communicate with the evaporator 21 side of a heat pump 20, also making the other supplying flow passage 10B communicate with the condenser 22 side of the heat pump 20, cooling the temperature-controlling water passing through the evaporator 21 side by a set temperature difference Δt1 from the temperature of the stock water, heating the temperature-controlling water passing through the condenser 22 side by a set temperature difference Δt2 from the temperature of the stock water by the heat exchanging action of the heat pump 20 to obtain a necessary temperature difference for the statolith temperature-labeling by the sum of the absolute values of the set temperature differences Δt1 and Δt2, and outputting the temperature-controlling water passing through the evaporator 21 side and the temperature-controlling water passing through the condenser 22 side by switching at an each set time interval. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a temperature control method and a temperature control apparatus for fry production water for producing fry of released fish such as salmon and masashi.

  Regarding temperature control of fry production water, the present applicant has proposed a technique shown in Patent Document 1 below. In this proposal, when supplying raw water collected from a water supply source such as a river or the sea to a fish hatchery pond, the raw water is cooled or heated by a water temperature adjusting means before being supplied to the hatchery pond. Create temperature-controlled water that changes temperature so that a certain temperature difference occurs with respect to the change, and feed these raw water and temperature-controlled water alternately to fish hatchery ponds at regular intervals with a preset water temperature change pattern Supplying a barcode-like pattern on the fish otolith.

Japanese Patent No. 3542337

  It is said that a temperature difference of about 4 ° C is required for the application of the otolith temperature mark. By changing the temperature of the produced water periodically with this temperature difference, the bar code pattern mark is added to the otolith. It becomes possible to form. This otolith temperature marker is used for the investigation of the regression rate indicating how much it returns to the discharge point.

  In the conventional technology, when the growth is suppressed, a temperature change of 4 ° C. is caused from the raw water temperature to the minus side, and when the growth is promoted, a temperature change of 4 ° C. from the raw water temperature is added to the plus side. It was generated. According to this, since the temperature change from the raw water must be large, the effect of suppressing growth or promoting growth is high, but there is a concern that various adverse effects are caused by the large temperature change.

  For example, when carrying out growth suppression, since the eggs after fertilization are put into a low temperature water zone at once, there is a concern that the growth curve will be distorted and the fry will not grow healthy, and when promoting growth, When it passes the egg season and enters the fish farming season, it is put in a high temperature zone at a stretch, so that the growth progresses rapidly, the absorption of citrus (nutrients) is accelerated, and the growth balance of each internal organ officer gets worse. There was a concern.

  In addition, since the raw water of the apparatus body is moved up and down by about 4 ° C., a large amount of electric power is required to raise and lower the temperature. For example, in order to lower the raw water of 50 liters per minute by 4 ° C., 12000 calories are required in 60 minutes, and the heat pump drive source requires a capacity of about 4 Kw. There was a need for improvement from the viewpoint of energy saving because a large amount of production water is required for fry production.

  Furthermore, since a temperature difference of + 4 ° C. or −4 ° C. was given to the raw water, when the temperature control device stops due to some trouble, when returning to the temperature before control from the temperature at the time of control, + 4 ° C. or A temperature difference of −4 ° C. is given to the fry. If such trouble occurs, the fry will receive a sudden temperature shock, and the health of the fry will be impaired.

  This invention makes it an example of a subject to cope with such a problem. In other words, in the temperature control of fry production water to give an otolith temperature indicator, it is possible to produce healthy fry, reduce the required capacity of the device and perform control with less energy consumption, temperature control It is an object of the present invention to prevent a sudden temperature shock from being applied to the fry even when trouble occurs in the apparatus.

  In order to achieve such an object, the present invention is, in part, a method for controlling the temperature of production water for producing fry, and the supply flow path for supplying raw water is divided into two. The raw water flowing through the one supply flow path is cooled by the set temperature difference Δt1 from the temperature of the raw water, and the raw water flowing through the other supply flow path is heated by the set temperature difference Δt2 from the temperature of the raw water, and cooled by the set temperature Δt1. By outputting the conditioned water and the conditioned water heated by the set temperature Δt2, the required temperature difference is obtained by the sum of the absolute values of the set temperature difference Δt1 and the set temperature difference Δt2. Here, Δt1 and Δt2 are arbitrary temperature differences, and Δt1 = Δt2 or Δt1 ≠ Δt2.

  More specifically, it is a method for controlling the temperature of production water for producing fry, which branches a supply flow path to which raw water is supplied into two, and connects the one supply flow path to the evaporator side of the heat pump. While communicating, the other supply flow path is connected to the condenser side of the heat pump, and the temperature-controlled water that has passed through the evaporator side is cooled by the set temperature difference Δt1 from the temperature of the raw water by the heat exchange action of the heat pump. The temperature-controlled water that has passed through the condenser side is heated by a set temperature difference Δt2 from the temperature of the raw water, and the temperature difference required for the otolith temperature sign is determined by the sum of the absolute values of the set temperature difference Δt1 and the set temperature difference Δt2. The temperature-controlled water that has passed through the evaporator side and the temperature-controlled water that has passed through the condenser side are switched at each set time and output.

  One is an apparatus for controlling the temperature of production water for producing fry, comprising a supply channel that branches the supplied raw water into two channels, and a raw water that flows through one branched channel. A cooling means for cooling, a heating means for heating the raw water flowing through the other branched flow path, a conditioned water cooled by the cooling means, and an output flow path for outputting the conditioned water heated by the heating means. It is characterized by providing.

  More specifically, it is an apparatus for controlling the temperature of production water for producing fry, comprising a supply channel through which raw water is supplied, a heat pump that imparts a temperature change to the supplied raw water, and a control from the heat pump. An output flow path for outputting hot water is provided, the supply flow path is branched into two, one of the supply flow paths is connected to the evaporator side of the heat pump, and the other supply flow path is connected to the condenser of the heat pump. The temperature-controlled water that has passed through the evaporator side is cooled by a set temperature difference Δt1 from the temperature of the raw water by the heat exchange action of the heat pump, and the temperature-controlled water that has passed through the condenser side is cooled by the temperature of the raw water The temperature difference required for the otolith temperature marker is obtained by heating the set temperature difference Δt2 by the sum of absolute values of the set temperature difference Δt1 and the set temperature difference Δt2, and the output flow path is connected to the evaporator side. With the conditioned water that passed Further comprising a flow passage switching means for outputting the switched every set time and serial condenser tone has passed through the side hot water and said.

  According to such a feature, when applying the otolith temperature marker, the temperature difference from the raw water can be reduced at the beginning and end of the work. Thereby, the shock of the temperature difference which a fish receives can be suppressed, and an otolith temperature mark can be given while performing sound fry production.

  In addition, since the average temperature of the stage where the otolith temperature labeling is performed can be brought close to the temperature of the raw water, the otolith temperature labeling can be performed in a breeding environment in line with the natural environment, and fry production can be achieved. It can be closer to natural growth.

  Even if some trouble occurs in the temperature controller and the control stops, the temperature difference actually added to the raw water is about half of the required temperature difference. The advantage of not giving is obtained.

  When checking the growth status of fry, a temperature integration method can be adopted, but the integrated temperature does not differ from the integration of the raw water temperature even if the temperature is changed. It can be performed.

  With one heat pump, two types of temperature-controlled water can be generated from raw water, and temperature-controlled water having a necessary temperature range can be generated simultaneously. As a result, the temperature change from the raw water can be kept low compared to the case where a desired temperature difference is added to either the positive side or the negative side from the raw water. It becomes possible to do. According to this, power consumption can be greatly reduced, and adjustment and management can be easily performed by a low-capacity heat pump with a low management level.

  In addition, since the conditioned water that has cooled the raw water and the heated conditioned water can be generated at the same time, depending on whether these conditioned waters are used separately or by switching, the work of promoting growth, suppressing growth, and applying otolith temperature markers Can be performed simultaneously.

It is explanatory drawing explaining the temperature control apparatus and temperature control method of the fry productive water which concern on embodiment of this invention. It is explanatory drawing which showed the example of control of the fry production water by the temperature control apparatus and temperature control method of the fry production water which concern on embodiment of this invention. It is explanatory drawing which shows other embodiment of the temperature control apparatus and temperature control method of the fry production water based on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram illustrating a temperature control device and a temperature control method for fry productive water according to an embodiment of the present invention. The raw water mentioned here is collected from a water supply source such as a river, sea or well in a natural environment. Therefore, the raw water does not have a constant temperature, but the temperature changes from time to time depending on the temperature, the daytime, or the season. The temperature control device for fry productive water according to an embodiment of the present invention includes a supply channel 10 that branches the supplied raw water into two channels, and a cooling means 21 that cools the raw water that flows through the one branched channel. And heating means 22 for heating the raw water flowing through the other branched flow paths, and an output flow path 30 for outputting the conditioned water cooled by the cooling means 21 and the conditioned water heated by the heating means 22. ing.

  More specifically, the supply flow path 10 to which raw water is supplied, the cooling means 21 and the heating means described above, a heat pump 20 that gives a temperature change to the supplied raw water, and conditioned water from the heat pump 20 are supplied. And an output flow path 30 for outputting.

  The supply flow path 10 is branched into two supply flow paths 10A and 10B. The supply flow paths 10A and 10B are respectively provided with raw water supply pumps 11 and 12. The raw water flowing into the supply channel 10 is divided into two supply channels 10A and 10B, one being supplied to the cooling means 21 and the other being supplied to the heating means 22.

The heat pump 20 includes a cooling means (evaporator) 21, a heating means (condenser) 22, and a compression / expansion means 23, and from the raw water supplied to the cooling means (evaporator) 21 side by its heat exchange action. The raw water supplied to the heating means (condenser) 22 side is deprived of heat and heated. This heat pump 20 cools the conditioned water cooled by passing through the cooling means (evaporator) 21 side by a set temperature difference Δt1 from the temperature t ₀ of the raw water, and the conditioned water passed through the heating means (condenser) 22 side. Is heated by the set temperature difference Δt2 from the temperature t ₀ of the raw water, and control is performed so as to obtain, for example, a temperature difference (required temperature difference) required for the otolith temperature sign by the sum of absolute values of the set temperature difference Δt1 and the set temperature difference Δt2. Is done. More specifically, Δt1 = Δt2 = 2 ° C., and Δt1 + Δt2 = 4 ° C., so that a temperature difference necessary for applying the otolith temperature mark is obtained.

  The temperature-controlled water to which the temperature change is added by the heat pump 20 is sent to the fry production tank 40 through the output flow path 30. The output flow path 30 outputs the conditioned water heated by passing through the output flow path 30A that passes the cooling means (evaporator) 21 side and outputs the conditioned water cooled by the heating means (condenser) 22 side. An output flow path 30B is provided, and the output flow paths 30A and 30B are connected to one output flow path 30C via a switching valve (flow path switching means) 31. The switching valve 31 can selectively switch between a state in which only the output flow path 30A is connected to the output flow path 30C and a state in which only the output flow path 30B is connected to the output flow path 30C.

According to this, fry production water control as shown in FIG. 2 can be performed. In the example shown in FIG. 2A, control is performed to add a temperature change necessary for applying an otolith temperature marker to raw water. In this case, by switching the switching valve 31 that is the flow path switching means at every set time, when the output flow path 30A is selected, the water becomes the product water at the temperature t ₀ -Δt1, and the output flow path 30B. Is selected, it becomes the production water at the temperature t ₀ + Δt2. Since the temperature difference Δt1 + Δt2 between the two is set to a temperature difference necessary for the application of the otolith temperature marker, the necessary information (label) is controlled by controlling this switching operation according to the information of the applied marker. Can be granted.

At this time, the temperature difference given to the temperature t ₀ of the raw water is + Δt1 (eg + 2 ° C.) or −Δt 2 (−2 ° C.). Since it can be reduced, the temperature difference given to the fish by the first temperature change from the temperature state of the raw water can be reduced, and the shock due to the temperature difference can be reduced. As a result, the otolith temperature marker can be applied while maintaining a healthy growth state.

  And even if such a temperature change is added to the raw water, the integrated temperature does not change from the integrated temperature of the raw water, so even when adopting the integration method to check the growth status of the fry, the temperature change of the produced water It is possible to grasp the growth state by integrating the raw water temperature without considering the above.

Furthermore, since the temperature change applied to the raw water is Δt1, a temperature difference necessary for applying an otolith temperature marker to one of the plus side and the minus side with respect to the temperature t ₀ of the raw water is provided as in the prior art. Compared with, power consumption can be significantly reduced. In addition, since it is not necessary to use a heat pump 20 having a high output, it is possible to easily manage the heat pump 20 without depending on a manager having a special management ability.

FIG.2 (b) is explanatory drawing which showed the temperature control of the fry production water for performing growth promotion. According to this, since the production water can be heated only by Δt1 with respect to the temperature t ₀ of the raw water, a rapid promotion effect cannot be obtained, but it can be dealt with by extending the promotion period accordingly. do it. In this case, since the growth can be promoted without a shock of temperature change, the growth balance of the internal organs and the like is improved with a gentle growth.

FIG.2 (c) is explanatory drawing which showed the temperature control of the fry production water for performing growth suppression. According to this, the temperature change can cool the produced water only by Δt2 with respect to the temperature t ₀ of the raw water, so that a rapid suppression effect cannot be obtained, but it can be dealt with by extending the promotion period accordingly. That's fine. In this case, since the growth suppression without the shock of temperature change can be performed, there is no problem that the growth curve is distorted.

  FIG.2 (d) is explanatory drawing which showed the temperature change of the production water with respect to the raw water temperature change along time passage. As is apparent from the figure, the production water controlled as described above changes with the passage of time so as to follow the temperature change of the raw water. As a result, time-series temperature changes inherent in the natural environment are also given to the produced water, and a natural growth environment equivalent to the growth of natural fry can be given.

FIG. 3 shows another embodiment of the temperature control device and temperature control method for fry productive water according to the present invention. According to the embodiment of the present invention, the supply flow path 10 to which raw water is supplied is branched into two, and the raw water flowing through the one supply flow path 10A is cooled by a set temperature difference Δt1 from the temperature t ₀ of the raw water, The raw water flowing through the other supply flow path 10B is heated by the set temperature difference Δt2 from the temperature t ₀ of the raw water, and the conditioned water (temperature: t ₀ −Δt1) cooled by the set temperature Δt1 and the adjusted temperature heated by the set temperature Δt2. By outputting warm water (temperature: t ₀ + Δt2), the required temperature difference is obtained by the sum of absolute values of the set temperature difference Δt1 and the set temperature difference Δt2.

Therefore, using the conditioned water having the required temperature difference, the output flow paths 30A and 30B are connected to one output flow path 30C via the switching valve (flow path switching means) 31 as in the above-described embodiment. and, by storing the product water output from the output flow path 30C to the fry production tank 40A, performs otolith temperature label application work to provide periodically the temperature difference leads to t ₀ -Δt1 from t ₀ + .DELTA.t2 here be able to. At the same time, the temperature-controlled water obtained by cooling the raw water by Δt1 is output from the output flow path 30A to another fry production tank 40B, and here, the growth suppression operation can be performed with the temperature-controlled water cooled by t ₀ −Δt1. it can. At the same time, the temperature-controlled water obtained by heating the raw water by Δt2 is output from the output flow path 30B to another fry production tank 40C, so that the growth promotion work can be performed using the temperature-controlled water heated at t ₀ + Δt2. .

That is, according to the embodiment of the present invention, by using one temperature control device (heat pump 20), different operations such as growth suppression, growth promotion, and otolith temperature labeling can be performed simultaneously. Moreover, by performing the temperature control at this time by the heat exchanging action of the heat pump 20, it is possible to perform different temperature control necessary for the three types of work with very little power consumption. Also, in this case, considering the case where the temperature control device has stopped due to some trouble, the temperature in each tank will return to the raw water temperature t ₀ before the control, but the temperature difference at that time is respectively Since it is only Δt1 or Δt2, it does not give a large temperature difference shock to the fry.

  Furthermore, the temperature-controlled water having the temperature difference Δt1 + Δt2 output from the output flow paths 30A and 30B can be appropriately mixed to obtain product water having an arbitrary temperature within the temperature range. By utilizing this, it is possible to perform both a curved temperature production method (see FIG. 2 (d)) that gradually changes the temperature change over time and a constant temperature production method that makes the temperature constant over time. It becomes possible.

  As described above, according to the temperature control method and the temperature control device for fry production water according to the embodiment of the present invention, in the temperature control of fry production water for providing an otolith temperature marker, produce healthy fry. Therefore, it is possible to perform control with low energy consumption by reducing the required capacity of the apparatus. Moreover, not only this otolith temperature labeling but also various temperature control including growth suppression and growth promotion can be performed with less energy consumption. Furthermore, since the conditioned water to which the temperature change is applied can be utilized for fry production without waste, fry production with high energy utilization efficiency can be performed.

  Furthermore, since the temperature change from the raw water is kept to a minimum, natural production close to natural fry growth is possible, ensuring the soundness of fry and producing fry production that is expected to improve the regression rate. be able to.

  Below, the Example in the case of performing growth suppression (product water heating) or growth promotion (product water cooling) with the temperature control method or temperature control apparatus of the fry production water of this invention is shown. Since one curan of the production water discharge port is used for about 30 to 45 days in one egg stage in one fry production tank, considering that the period of discharge time is limited, one curan cannot be used twice. .

<Conditions for implementation>
Production water discharge flow rate: 50 liters / minute (= 1 currant)
Number of eggs processed: about 2 million grains / 1 curan Operating temperature: Comparative example Raw water + 4 ° C (during growth promotion)
Raw water -4 ℃ (during growth suppression)
Example Raw water + 2 ° C (during growth promotion)
Raw water -2 ° C (during growth suppression)
Period of use: Comparative example 1 month (only hatching period)
Example 2 months (incubation period + fish cultivation period)
<Amount of heat consumed / Required power>
Comparative Example Heat consumption: 50 liters x 4 ° C x 60 minutes = 12,000 calories / hour Required power: 4KW
Example Heat consumption: 50 liters × 2 ° C. × 60 minutes = 6,000 calories / hour Required power: 2 KW

  As is clear from the above comparison, growth suppression or growth promotion is performed at a temperature difference of 4 ° C. from the raw water as in the comparative example, and growth suppression or growth promotion is performed at a temperature difference of 2 ° C. from the raw water as in the example. Compared to the case of performing the example, the period of use of the example is twice that of the comparative example, so there is no difference in the amount of heat consumed during the period of use, but the example can reduce the required power compared to the comparative example. it can. As a result, the apparatus can be reduced in size and price, and the contract power (wattage) can be kept low, so that both initial investment and running cost can be reduced.

10, 10A, 10B: supply flow path,
11, 12: Pump,
20: heat pump, 21: evaporator, 22: condenser, 23: compression / expansion means,
30, 30A, 30B, 30C: output flow path,
31: switching valve (switching means),
40, 40A, 40B, 40C: fry production tank

Claims (7)

A method for controlling the temperature of production water for producing fry,
The supply flow path to which the raw water is supplied is branched into two, the raw water flowing through the one supply flow path is cooled by a set temperature difference Δt1 from the temperature of the raw water, and the raw water flowing through the other supply flow paths is cooled to the temperature of the raw water Heat by the set temperature difference Δt2,
By outputting the conditioned water cooled by the set temperature Δt1 and the conditioned water heated by the set temperature Δt2, a required temperature difference is obtained by the sum of the absolute values of the set temperature difference Δt1 and the set temperature difference Δt2. The temperature control method of fry production water characterized by A method for controlling the temperature of production water for producing fry,
The supply flow path for supplying raw water is branched into two, and one of the supply flow paths is connected to the evaporator side of the heat pump, and the other supply flow path is connected to the condenser side of the heat pump,
Due to the heat exchange action of the heat pump, the temperature-controlled water that has passed through the evaporator side is cooled by a set temperature difference Δt1 from the temperature of the raw water, and the temperature-controlled water that has passed through the condenser side is set at a set temperature difference Δt2 from the temperature of the raw water. The temperature difference required for the otolith temperature sign is obtained by the sum of absolute values of the set temperature difference Δt1 and the set temperature difference Δt2, and the temperature-controlled water that has passed through the evaporator side and the condenser side A temperature control method for fry production water, characterized in that the adjusted temperature-controlled water is switched and output every set time.   The temperature control method for fry productive water according to claim 2, wherein the set temperature difference Δt1 and the set temperature difference Δt2 are both set to 2 ° C to obtain a temperature difference of 4 ° C necessary for the otolith temperature mark. A device for controlling the temperature of production water for producing fry,
A supply channel that branches the supplied raw water into two channels;
Cooling means for cooling raw water flowing through one branched flow path;
Heating means for heating the raw water flowing through the other branched flow path;
A temperature control device for fry productive water, comprising temperature-controlled water cooled by the cooling means and an output channel for outputting the temperature-controlled water heated by the heating means.   The said output flow path is provided with the switching means which switches and outputs the temperature-controlled water cooled by the said cooling means, and the temperature-controlled water heated by the said heating means, The fry production water described in Claim 4 characterized by the above-mentioned. Temperature control device.   5. The temperature control of fry productive water according to claim 4, wherein the output flow path outputs the temperature-controlled water cooled by the cooling means and the temperature-controlled water heated by the heating means to different tanks. apparatus. A device for controlling the temperature of production water for producing fry,
A supply channel through which raw water is supplied;
A heat pump that imparts a temperature change to the supplied raw water;
An output flow path for outputting the temperature-controlled water from the heat pump;
The supply channel is branched into two, and one of the supply channels communicates with the evaporator side of the heat pump, and the other supply channel communicates with the condenser side of the heat pump,
Due to the heat exchange action of the heat pump, the temperature-controlled water that has passed through the evaporator side is cooled by a set temperature difference Δt1 from the temperature of the raw water, and the temperature-controlled water that has passed through the condenser side is set at a set temperature difference Δt2 from the temperature of the raw water. Only to obtain the temperature difference required for the otolith temperature sign by the sum of absolute values of the set temperature difference Δt1 and the set temperature difference Δt2,
The temperature control of the fry productive water characterized by the said output flow path being provided with the switching means which switches and outputs the temperature-controlled water which passed the said evaporator side, and the temperature-controlled water which passed the said condenser side for every set time. apparatus.

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