Based On Variable Air Volume Control Mode Refrigerated Container Cabin Ventilation System Energy

Due to the influence of the declining transport price and rising price of international crude petroleum, currently many shipping companies are facing to great cost pressure. And due to stricter rules form International Maritime Organization; energy efficiency problem is extremely urgent task at present.Along with the development of micro-electronic technology and power electronics, the varied frequency technique is increasingly used. For saving energy in the venting system, the varied rate fans are used to replace the constant rate fans. In this paper, the theoretical analysis method is used to research the energy saving of the heat dissipation and ventilation system in cabin, and, with the help of the MATLAB-SIMULINK tool, apply the simulation technique to imitate the system.The thesis includes the following three parts.Firstly, the paper tells us the survey of the present air temperature changes with outside environment, and the ventilation and heat radiation technology of refrigeration container in holder. Meanwhile it states the features about the varied frequency adjustment venting system, analyses it and draw the conclusion that people can obtain good result by applying variable regulation technology.Secondly, the author develops the models and the controlling designs (adoption of PID control) under the circumstance of the refrigerated containers in holds. On the other hand, the thesis applies MATLAB into making simulation research about variable regulation and energy efficiency technology of whole ventilation and heat radiation system.Lastly, the author verifies the correctness of theoretical analyses and simulation result with the experiments and makes the economical analyses of the varied frequency simulation technology.The thesis mainly discusses how people substitute the constant rate fans with the varied rate fans with the application of the automatic control technology (PID control), varied frequency simulation technique by MATLAB, a MATLBA simulation and experiment research and some other means; and discusses the energy efficiency problem of the ventilation and heat radiation technology of refrigeration container in holder at the situation of constant air volume (CAV) substituted by the variable air volume (VAV).