A method for precise temperature control in seafood farming using energy calculations

Abstract

This invention discloses a method for precise temperature control in seafood aquaculture through energy calculation. The method includes the following steps: Step 1, setting a set temperature for each independent seafood tank based on the survival temperature range of the seafood; Step 2, obtaining the real-time outlet temperature of the water injected into the seafood tank; Step 3, calculating the difference between the outlet temperature and the user-set temperature; Step 4, calculating the total volume of the seafood tank; Step 5, based on market demand and the survival characteristics of the seafood, preset the heating / cooling rate of the seafood tank product to v℃ / second; Step 6, calculating and executing the output power of the heat exchange device. This invention can calculate the target output power of the heat exchange device according to the current temperature control requirements of different independent tanks, implement the most suitable energy output, achieve precise water temperature control in different tanks, reduce fluctuations, and save energy.

Description

Technical Field

[0001] This invention belongs to the technical field of seafood aquaculture, specifically relating to a method for achieving precise temperature control in seafood aquaculture through energy calculation. Background Technology

[0002] As people's living standards continue to improve in my country, seafood is increasingly becoming a staple on their tables. Due to the varying aquatic distribution of different seafood products, a significant amount of time is inevitably spent on transportation, cultivation, and sales to meet the purchasing needs of customers in different regions. Clearly, the survival rate of seafood is a crucial profit factor during this lengthy process. This, combined with the expenses incurred by merchants to ensure a high survival rate, determines the economic benefits for seafood merchants. Therefore, finding a balance between these two factors to maximize economic benefits is a critical issue for seafood merchants.

[0003] Currently, the main equipment used for storing farmed seafood is multi-functional seafood tanks or ponds. These devices are designed to meet the diverse environmental needs of different seafood species, such as water temperature, oxygen levels, pH levels, and cleanliness requirements. The mainboard software, based on user settings and specific control strategies, caters to the specific needs of different fish species, achieving higher survival rates. Temperature control is a crucial factor in the survival environment of seafood; suitable temperatures improve survival rates. Since multiple tanks may house different types of seafood, each tank requires a different target water temperature. If the output power of heat exchange equipment (such as refrigerators, compressors, and electric heaters) is too high or too low, it can lead to wasted energy, inaccurate temperature control within the tank, or fluctuating water temperatures.

[0004] Patent application 202110121663.9 discloses an intelligent aquatic seafood tank control method, system, and terminal based on the Internet of Things (IoT), belonging to the field of fish farming. The method includes: acquiring fish information input by the user for the current aquatic seafood tank and generating a detailed list of farmed fish based on the fish information; acquiring optimal survival environment information for each type of farmed fish in the aquatic seafood tank based on the farmed fish species information; calculating and acquiring recommended feeding data; integrating the optimal temperature data and recommended feeding data to generate a farming suggestion report and feeding the report back to the user terminal; acquiring the farming environment parameters set by the user for the current aquatic seafood tank; acquiring the actual environmental parameters of the current aquatic seafood tank; determining whether the farming environment parameters are consistent with the actual environmental parameters, and if not, generating an adjustment command.

[0005] Although the application can improve the survival rate of farmed fish by using temperature, it only achieves this through adaptation to environmental temperature and cannot regulate and control the temperature. Given the rise of artificial aquaculture, there is an urgent need to control the water temperature in seafood tanks. Summary of the Invention

[0006] Based on this, the purpose of the present invention is to provide a method for achieving precise temperature control in seafood farming through energy calculation. This method calculates the target output power of the heat exchange equipment according to the current temperature control requirements of different independent tanks, implements the most matched energy output, and achieves precise water temperature control in different tanks, reducing fluctuations and saving electricity.

[0007] Another objective of this invention is to provide a method for precise temperature control in seafood farming through energy calculation. This method calculates the optimal output power based on the real-time water volume of each seafood tank, thereby achieving precise water temperature control.

[0008] To achieve the above objectives, the technical solution of the present invention is as follows.

[0009] A method for precise temperature control in seafood farming using energy calculations, comprising the following steps:

[0010] Step 1: Set the temperature for each individual seafood tank according to the temperature range in which the seafood can survive.

[0011] Users can set the temperature of each individual seafood tank in the same seafood tank group as Ts1, Ts2, Ts3...Tsn (unit: °C) on the control panel according to the different survival temperature ranges of different seafood.

[0012] Step 2: Obtain the real-time water temperature of the water injected into the seafood tank.

[0013] The real-time outlet water temperature T1, T2, T3...Tn (unit: °C) of the injected water in each individual seafood tank is obtained by temperature sensors installed at the water inlet of each individual seafood tank.

[0014] Step 3: Calculate the difference between the output water temperature and the user-set temperature;

[0015] The difference between the current injected water outlet temperature and the user-set Ts temperature is calculated in real time as T1-Ts1, T2-Ts2, T2-Ts3...Tn-Tsn, and the result is recorded as △T1, △T2, △T3...△Tn (can be positive or negative, unit: ℃).

[0016] Step 4: Calculate the total volume of the seafood tank;

[0017] Substituting the preset bottom area values ​​S1, S2, S3...Sn of the seafood tanks and the detected real-time water levels h1, h2, h3...hn of each tank into the volume formula, the total volumes V1, V2, V3,..., Vn are calculated:

[0018] V n =S n h n

[0019] Step 5: Based on market demand and the survival characteristics of seafood, preset the heating / cooling rate of this seafood tank product to v℃ / second;

[0020] Step 6: Calculate and execute the output power of the heat exchange equipment. The formula for calculating the output power is as follows:

[0021] P output=(c*ρ*V1*v) / η+(c*ρ*V2*v) / η+(c*ρ*V3*v) / η+...+(c*ρ*Vn*v) / η,

[0022] Where c is the specific heat capacity of water, which is 4.2 × 10 J / (kg℃); ρ is the density of water, which is 1.0 × 10 kg / m³; and η is the thermal conductivity, which ranges from 0.0 to 1.0.

[0023] Specifically, first, according to the water heating formula

[0024] Q = Pt = c * m * ΔT = c * ρ * V * ΔT

[0025] Where Q is the required energy (J); c is the specific heat capacity of water, which is 4.2 × 10⁻⁶ J / (kg℃); and ρ is the density of water, which is 1.0 × 10⁻⁶ kg / m³. 3 P is the required power; m is the mass of water (kg); t is the time required for the temperature to rise.

[0026] Combination

[0027] ΔT=vt

[0028] get

[0029] P = c * ρ * V * ΔT / t = c * ρ * V * v

[0030] Further combining heat transfer / refrigerant transfer efficiency

[0031] P output = P / η

[0032] Where η is the heat transfer efficiency, ranging from 0.0 to 1.0, the final formula for the output power of the heat exchange equipment is obtained:

[0033] P output=(c*ρ*V1*v) / η+(c*ρ*V2*v) / η+(c*ρ*V3*v) / η+......+(c*ρ*Vn*v) / η

[0034] The system acquires the real-time water temperature T and set temperature Ts in the cylinder at fixed intervals and calculates ΔT1, ΔT2, ΔT3, ..., ΔTn. When heating, if ΔTn ≤ 0 for one or more cylinders, the corresponding cylinder volume value Vn is set to 0 and substituted into the above formula to calculate the output power and execute the operation. When cooling, if ΔTn ≥ 0 for one or more cylinders, the corresponding cylinder volume value Vn is set to 0 and substituted into the above formula to calculate the output power and execute the operation.

[0035] After calculating the P output using the above steps, directly outputting it to the seafood tank may result in a discrepancy between the theoretical calculation and the actual temperature control effect. For example, the outlet water temperature in different tanks may rise too quickly or too slowly. Therefore, to ensure the accuracy of the power calculation, a moving average method is used to predict the temperature trend, and the P output value is adjusted based on the prediction results. This helps to suppress fluctuations in the water temperature and achieve better temperature control. Specifically, this includes the following:

[0036] 1) Define a comprehensive water temperature, and calculate it as follows:

[0037]

[0038] 2) Obtain the average value of the overall water temperature over the past a seconds (e.g., within 10 seconds):

[0039] T 综合平均 =(T 综合1 +T 综合2 +T 综合3 +.....+T 综合a ) / a;

[0040] 3) Substitute the average T into the following formula to obtain the deviation trend M of the water temperature:

[0041]

[0042] 4) Use M to predict the trend of temperature change.

[0043] When the comparison reveals that the value of M consistently exceeds M1 (M1 is a preset value determined based on experimental results, such as 0.1) over time, and shows an increasing trend, it indicates that the water temperature is rising too rapidly. At this point, the output power P... 输出According to product requirements, the power should be reduced based on the specific value of M to suppress excessively rapid temperature rise. Conversely, if a comparison shows that the value of M is consistently less than M2 (M2 is a preset value for water temperature drop, determined based on experimental results, such as -0.1) over time, and shows an increasing trend, it indicates that the water temperature is dropping too quickly. In this case, the output power P should be increased. 输出 Increase the power according to the specific value of M as required by the product to suppress the temperature from dropping too quickly.

[0044] The specific power P follows the value of M and is corrected using a function:

[0045]

[0046] Compared with the prior art, the beneficial effects of the present invention are:

[0047] The method implemented in this invention calculates the most suitable output power control based on the real-time water volume of each seafood tank. It can calculate the target output power of the heat exchange equipment according to the current temperature control requirements of different independent tanks, implement the most suitable energy output, achieve precise water temperature control of different tanks, reduce fluctuations, and save electricity. Attached Figure Description

[0048] Figure 1 This is a flowchart illustrating the implementation of this invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0050] Figure 1 As shown, this invention provides a method for precise temperature control in seafood aquaculture through energy calculation. The method includes the following steps:

[0051] Step 1: Set the temperature for each individual seafood tank according to the temperature range in which the seafood can survive.

[0052] Users can set the temperature of each individual seafood tank in the same seafood tank group as Ts1, Ts2, Ts3...Tsn (unit: °C) on the control panel according to the different survival temperature ranges of different seafood.

[0053] Step 2: Obtain the real-time water temperature of the water injected into the seafood tank.

[0054] The real-time outlet water temperature T1, T2, T3...Tn (unit: °C) of the injected water in each individual seafood tank is obtained by temperature sensors installed at the water inlet of each individual seafood tank.

[0055] Step 3: Calculate the difference between the output water temperature and the user-set temperature;

[0056] The difference between the current injected water outlet temperature and the user-set Ts temperature is calculated in real time as T1-Ts1, T2-Ts2, T2-Ts3...Tn-Tsn, and the result is recorded as △T1, △T2, △T3...△Tn (can be positive or negative, unit: ℃).

[0057] Step 4: Calculate the total volume of the seafood tank;

[0058] Substituting the preset bottom area values ​​S1, S2, S3...Sn of the seafood tanks and the detected real-time water levels h1, h2, h3...hn of each tank into the volume formula, the total volumes V1, V2, V3,..., Vn are calculated:

[0059] V n =S n h n

[0060] Step 5: Based on market demand and the survival characteristics of seafood, preset the heating / cooling rate of this seafood tank product to v℃ / second; for example: 0.2℃ / second.

[0061] Step 6: Calculate and execute the output power of the heat exchange equipment. The formula for calculating the output power is as follows:

[0062] P output=(c*ρ*V1*v) / η+(c*ρ*V2*v) / η+(c*ρ*V3*v) / η+...+(c*ρ*Vn*v) / η,

[0063] Where c is the specific heat capacity of water, which is 4.2 × 10 J / (kg℃); ρ is the density of water, which is 1.0 × 10 kg / m³; and η is the thermal conductivity, which ranges from 0.0 to 1.0.

[0064] Specifically, first, according to the water heating formula

[0065] Q = Pt = c * m * ΔT = c * ρ * V * ΔT

[0066] Where Q is the required energy (J); c is the specific heat capacity of water, which is 4.2 × 10⁻⁶ J / (kg℃); and ρ is the density of water, which is 1.0 × 10⁻⁶ kg / m³. 3 P is the required power; m is the mass of water (kg); t is the time required for the temperature to rise.

[0067] Combination

[0068] ΔT=vt

[0069] get

[0070] P = c * ρ * V * ΔT / t = c * ρ * V * v

[0071] Further combining heat transfer / refrigerant transfer efficiency

[0072] P output = P / η

[0073] Where η is the heat transfer efficiency, ranging from 0.0 to 1.0, the final formula for the output power of the heat exchange equipment is obtained:

[0074] P output=(c*ρ*V1*v) / η+(c*ρ*V2*v) / η+(c*ρ*V3*v) / η+...+(c*ρ*Vn*v) / η.

[0075] The system acquires the real-time water temperature T and set temperature Ts in the cylinder at fixed intervals and calculates ΔT1, ΔT2, ΔT3, ..., ΔTn. When heating, if ΔTn ≤ 0 for one or more cylinders, the corresponding cylinder volume value Vn is set to 0 and substituted into the above formula to calculate the output power and execute the operation. When cooling, if ΔTn ≥ 0 for one or more cylinders, the corresponding cylinder volume value Vn is set to 0 and substituted into the above formula to calculate the output power.

[0076] Specifically, a power correction algorithm is added: After calculating the P output according to the above steps, if it is directly output to the seafood tank, there may be a deviation between the theoretical calculation and the actual temperature control effect. For example, the outlet water temperature of different tanks may rise too quickly or too slowly. By using a moving average method to predict the temperature trend and correcting the P output value based on the prediction result, the phenomenon of fluctuating water temperature can be suppressed to a certain extent, achieving a better temperature control effect.

[0077] 1) Define a comprehensive water temperature, and calculate it as follows:

[0078]

[0079] 2) Calculate the average comprehensive water temperature over the past a seconds (e.g., within 10 seconds) using the following method:

[0080] Tcomprehensive average = (Tcomprehensive1 + Tcomprehensive2 + Tcomprehensive3 + ... + Tcomprehensiveaa) / a;

[0081] 3) Substitute the average T into the following formula to obtain the deviation trend M of the water temperature:

[0082]

[0083] 4) Application of M: The significance of M is to predict the trend of temperature changes. When the software comparison finds that the value of M is consistently greater than M1 (a preset value determined by researchers based on experimental results and natural scientific knowledge, such as 0.1) over time, and shows an increasing trend, it indicates that the water temperature is rising too rapidly. At this time, the output power P... 输出 According to product requirements, the power is reduced based on the specific value of M to suppress excessively rapid temperature rise. Conversely, if the software comparison shows that the value of M is consistently less than M2 (a preset value determined by R&D personnel based on experimental results and natural scientific knowledge, such as -0.1) over time, and shows an increasing trend, it indicates that the water temperature is dropping too quickly. In this case, the output power P... 输出 Increase the power according to the specific value of M as required by the product to suppress the temperature from dropping too quickly.

[0084] The specific method for correcting the power P following the value of M can be achieved by fitting the two together using a function, such as:

[0085]

[0086] Example: A seafood aquarium setup has three independent seafood tanks with normal water volume volumes V1, V2, and V3. During heating, at a certain moment, when ΔT1 = 15℃, ΔT2 = -5℃, and ΔT3 = 3℃ are detected, since ΔT2 ≤ 0, V2 is automatically set to 0 and substituted into the overall formula to obtain the total output power of the seafood aquarium setup at this time:

[0087] P output=(c*ρ*V1*v) / η+(c*ρ*V3*v) / η

[0088] Then, based on the deviation value M calculated from the water temperature value of the past 10 seconds, the output power is corrected, and the main board is controlled to execute and output the power to perform overall heat exchange control of the seafood tank group.

[0089] In summary, this invention calculates the optimal output power based on the real-time water volume of each seafood tank, and can calculate the target output power of the heat exchange equipment according to the current temperature control requirements of different independent tanks, implement the optimal energy output, achieve precise water temperature control of different tanks, reduce fluctuations, and save energy.

[0090] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for precise temperature control in seafood aquaculture through energy calculation, characterized in that... The method includes the following steps: Step 1: Set the temperature for each individual seafood tank according to the survival temperature range of the seafood; Step 2: Obtain the real-time water temperature of the water injected into the seafood tank. Step 3: Calculate the difference between the output water temperature and the user-set temperature; Step 4: Calculate the total volume of the seafood tank; Substituting the preset bottom area values ​​S1, S2, S3...Sn of the seafood tanks and the detected real-time water levels h1, h2, h3...hn of each tank into the volume formula, the total volumes V1, V2, V3,..., Vn are calculated: V n =S n h n Step 5: Based on market demand and the survival characteristics of seafood, preset the heating / cooling rate of this seafood tank product to v℃ / second; Step 6: Calculate and execute the output power of the heat exchange equipment. The formula for calculating the output power is as follows: P output=(c*ρ*V1*v) / η+(c*ρ*V2*v) / η+(c*ρ*V3*v) / η+...+(c*ρ*Vn*v) / η, Where c is the specific heat capacity of water, which is 4.2 × 10 J / (kg℃); ρ is the density of water, which is 1.0 × 10 kg / m³; and η is the thermal conductivity, which ranges from 0.0 to 1.

0.

2. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 1, characterized in that... In step 1, the user sets the temperature of each individual seafood tank in the same seafood tank group as Ts1, Ts2, Ts3...Tsn on the control panel according to the different survival temperature ranges of different seafood.

3. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 1, characterized in that... In step 2, the real-time outlet water temperature T1, T2, T3...Tn of each independent seafood tank is obtained by temperature sensors installed at the water inlet of each independent seafood tank.

4. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 1, characterized in that... In step 3, the differences between the current outlet water temperature and the user-set Ts temperature are calculated in real time as T1-Ts1, T2-Ts2, T2-Ts3...Tn-Tsn, and the results are recorded as △T1, △T2, △T3...△Tn.

5. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 1, characterized in that... In step 6, first apply the water heating formula. Q = Pt = c * m * ΔT = c * ρ * V * vT Where Q is the required energy (J); c is the specific heat capacity of water, which is 4.2 × 10 J / (kg℃); and ρ is the density of water, which is 1.0 × 10 kg / m³. 3 P is the required power; m is the mass of water (kg); t is the time required for the temperature to rise. Combination ΔT=vt get P = c * ρ * V * ΔT / t = c * ρ * V * v Further combining heat transfer / refrigerant transfer efficiency P output = P / η Where η is the heat transfer efficiency, ranging from 0.0 to 1.0, the final formula for the output power of the heat exchange equipment is obtained: P output=(c*ρ*V1*v) / η+(c*ρ*V2*v) / η+(c*ρ*V3*v) / η+...+(c*ρ*Vn*v) / η.

6. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 4, characterized in that... In step 6, the real-time water temperature T and the set temperature Ts in the cylinder are acquired at fixed intervals, and ΔT1, ΔT2, ΔT3...ΔTn are calculated. When heating, if ΔTn ≤ 0 for one or more cylinders, the volume value Vn of the corresponding cylinder is set to 0 and substituted into the above formula to calculate the output power and execute the operation. When cooling, if ΔTn ≥ 0 for one or more cylinders, the volume value Vn of the corresponding cylinder is set to 0 and substituted into the above formula to calculate the output power and execute the operation.

7. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 6, characterized in that... To ensure the accuracy of power calculation, temperature trend prediction is performed using a moving average method, and the P output value is adjusted based on the prediction results. This effectively suppresses fluctuations in water injection temperature, achieving better temperature control. The process includes the following: 1) Define a comprehensive water temperature, and calculate it as follows: 2) Obtain the average value of the overall water temperature over the past a seconds: Tcomprehensive average = (Tcomprehensive1 + Tcomprehensive2 + Tcomprehensive3 + ... + Tcomprehensiveaa) / a; 3) Substitute the average T into the following formula to obtain the water temperature deviation trend M: 4) Use M to predict the trend of temperature change.

8. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 7, characterized in that... If the comparison reveals that the value of M is consistently greater than M1 over time and shows an increasing trend, it indicates that the water temperature is rising too rapidly. At this point, the output power P... 输出 According to product requirements, the power should be reduced based on the specific value of M to suppress excessively rapid temperature rise. Conversely, if a comparison reveals that the value of M is consistently less than M2 over time and shows an increasing trend, it indicates that the water temperature is dropping too quickly. In this case, the output power P should be adjusted accordingly. 输出 The power is increased according to the specific value of M as required by the product to suppress the temperature from dropping too quickly. M1 is the preset value when the water temperature rises, which is determined based on experimental results; M2 is the preset value when the water temperature drops, which is determined based on experimental results.

9. The method for precise temperature control through energy calculation in seafood aquaculture as described in claim 8, characterized in that... The specific power P follows the value of M, which is corrected using the following formula:

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