Numerical Calculation Of Heat Preservation And Structural Performance Of Recirculating Aquaculture Tank

The unpredictability of water temperature has caused farmers a lot of grief recently in winter container recirculating aquaculture.Fish can grow and develop more quickly in waters with the right temperature.The growth and development will slow down if the water temperature in aquaculture is too low.In severe circumstances,fish will go into a dormant state,which will cause them to die eventually.This paper investigates the uncontrollable water temperature of container recirculating aquaculture in winter in order to adjust the water temperature in accordance with the needs of fish during the winter aquaculture process,in order to hasten fish growth,lessen the occurrence of diseases and increase farmers’ income.The primary research topics of this essay are as follows:1)The container culture box and a pure titanium heater are chosen as the research objects and the heat transfer performance is studied to ensure that the water temperature appropriate for the growth of fish in container culture will not affect the feeding and growth of fish due to low water temperature.SOLIDWORKS first created the model of the container culture box and pure titanium temperature control heater before it was loaded into the STAR-CCM+ platform for grid division.For the research,three pure titanium heaters with varying outputs of 2000 W,3000W,and 4000 W were used.There are five working conditions for each power.Numerical simulation analysis is used to calculate the temperature field of heat transfer and determine each power’s ideal operating conditions.According to the numerical results,it can be seen that when the heater of2000 W and 3000 W is selected,the heating time in the arrangement mode of working condition 5 is the shortest,and when the heater of 4000 W is selected,the heating time in the arrangement mode of working condition 2 is the shortest.Due to the different density of the water in the container culture box after heating,the high-temperature water in the lower part will flow upward,while the low-temperature water in the upper part will flow downward.In this way,convection is formed in the internal waters of the container box.The density of the high-temperature water is small and rises,while the density of the low-temperature water is large and falls.2)In order to further save electricity consumption,insulation materials are added to the container breeding box to increase the time it takes for the heated water to dissipate its heat,which will have the effect of preserving heat.The container culture box was first subjected to three-dimensional modeling,and the created model was then imported into COMSOL for grid division.The box with insulation materials added and the box without insulation materials were both subjected to numerical simulation.The major objective was to compare the insulating properties of an average winter daytime temperature of 10 degrees and an average winter nighttime environment of minus 5 degrees.The numerical simulation results show that after adding insulation materials,the heat dissipation time becomes significantly longer,which plays a better insulation effect and further saves electricity consumption.3)It is vital to improve the container breeding box to prevent the deformation and rupture of the container following water injection due to the higher water quality.Firstly,the model of the original container culture box is built,and then the built model is imported into ANSYS for grid division and finite element analysis.Finally,the model of the optimized box is built and its structural performance is studied.It is clear from the finite element study and comparison that the optimized box has improved more significantly.The finite element analysis shows that the maximum deformation of the original box is 29.082 mm,and the maximum deformation of the box is 11.777 mm after adding the column to strengthen the box.The optimized container breeding box deformation has been improved accordingly.After insulating and optimizing the design of the container breeding box,the breeding process can be more energy-efficient and the box structure can be more stable.This is because using pure titanium temperature control heaters can not only guarantee farmers in winter breeding have a suitable water temperature for fish growth and save the consumption of electricity.The research presented in this paper offers a fresh approach to container culture heating,insulation,and structure optimization.It also serves as a helpful resource for real-world applications.