Key Techniques Of Environmentally Controlled Fresh Seafood Transport Vehicle

The storage and transportation of fresh seafood is a fairly complex process. The key problems in the process of transportation is how to ensure the survival rates of aquatic products, the survival rate affects directly the economic benefits. The influence factors of fresh seafood survival rate are various, including structure of the transport device itself, water quality, oxygen, temperature of the environment and aquatic product quality, etc. In this kind of situation, we designed and developed a environment controllable fresh seafood truck, studied and analyzed its key technology to improve the aquatic product transportation survival rate for promoting the double harvest of economic benefit and social benefit.Based on the analysis and research of the characteristics of fresh aquatic products transportation, optimal designed the structure of transportation device, focusing on research of crucial technology parameters that ensure the survival rate of aquatic products-water quality control research, Further research, designed and developed on water temperature control system and circulating water refrigeration system, formated a controllable environment and a water quality control system of good performance.The difference between water cooling system and air condition system is the Heat transfer medium. In this paper, based on mathematical model of fluid heat transfer, we innovational constructed the tube spiral "liquid-liquid" physical model of heat transfer device, designed the structure of the heat exchanger, besides analyzed fluid heat transfer of the heat exchanger by SolidWorks Flow Simulation. In the process of heat analysis, through determined various initial condition and boundary conditions, we simulated the process of the heat transfer in fluid motion process, ensured the feasibility of cooling the recycling water with self-developed heat exchanger.The research showed that the main factor of influence refrigeration effect is the flow of water cycle. By changing the simulation initial conditions, we compared the fluid temperature change of heat exchanger outlet in the different circulation flow rate. The simulation results show that, the greater flow of water circulation, the higher temperature of heat exchanger outlet, the more poor refrigeration effect, and vice versa. Therefore, the outlet temperature of heat exchanger can be controlled by changing the flow of water circulation.In addition to used the software simulation, had water refrigeration test in aquatic products truck prototype. Use the controller and inverter to control the speed of the pump, to control the size of circulating water flow. The experiment tested that in different flow the temperature changes of heat exchanger outlet.Through the experiment, we confirmed the feasibility of self-developed heat exchanger in the actual application, it showed that the correctness of heat exchanger design method and reliability of model.