3D Heating Model Of Water Temperature And Researching Control Algorithm In Aquaculture

The whole world is in lack of energy sources with the rapid development of economic and technological. To improve its utilization ratio has great importance to China’s continuance development in economy. Aiming at the actuality that automation technology is exactly need in aquaculture factory of our country, this paper analyzes and researches the heat transfer theory and control algorithm. This system not only can realize the control on temperature, but also play a positive role in energy conservation and environmental protection at the same time.This paper fully analyzes the heat transfer process of water heating system with the basic principle of heat transfer, and assumes the model, analyzes the boundary conditions, and builds up the heat-transfer mathematic model. Using ANSYS simulation software analyzes the temperature distribution, velocity distribution and influential factors, which provides necessary theoretical basis for people from essentially know the basic laws of the heating system and the design of heat pipe.The paper puts forward the whole devise project and established the control system after the analyze of aquaculture environment monitoring research, and combined with water temperature control theory and realization process, and according to the analysis of temperature field guide sensor decorate. In the choice of control algorithms, because of the system is a nonlinear and large lag, it is hard to find the precise mathematical model and difficult to get a satisfactory effect in conventional control methods, but the fuzzy control as a branch of intelligence control field especially suites handing the system of the indetermination model, it doesn’t need mathematical model and has good anti-jamming capability. We are combing the advantages in both fuzzy control and PID control in the field of intelligent control, using fuzzy PID control algorithms to overcome the impact such as the inertia of the system and time-delay. At the same time, MATLAB is on the use of tools to support the design of control algorithms, and utilizes SIMULINK to design the fuzzy controller and to plot out step response curve of the controller, and achieves a good control effect.