冷藏集装箱在船舱装载情况下的散热优化研究

【作者】 蔡建国；

【导师】 杨万枫；

【作者基本信息】 上海海事大学 ， 制冷与低温工程， 2006， 硕士

【摘要】 随着微电子技术和电力电子学的发展，变频调速的应用日益广泛，采用变频调速器改变风机电机转速，可达到较好的节能效果。本文主要是对冷藏集装箱在船舱装载情况下的散热通风系统耗能进行理论分析及运用MATLAB-SIMULINKI具进行仿真模拟，主要内容包括以下三个部分： 首先，针对船舱排风温度随外界环境变化的特点，经过理论分析，由于散热通风系统风机按船舱外最恶劣环境情况下进行设计，如采用变频调节有很好的节能效果。 其次，建立了冷藏集装箱在船舱装载情况下的散热风机变频控制系统的控制方案(采用PID控制)，介绍了系统的特点及设计方法，并介绍了设备(变频器、电机、风机等)的仿真建模。 最后，建立了冷藏集装箱在船舱装载情况下的散热风机变频控制系统的数学模型，对整个散热系统进行了计算模拟，并运用MATLAB对风机变频节能进行了仿真模拟研究。 本文主要研究采用自动控制技术(PID控制)、变频模拟仿真及采用MATLAB仿真模拟来探讨船舱散热通风系统的自动控制技术，模拟用变频风机代替常规风机，用变风量代替定风量，以研究船舱散热风机的节能情况。更多还原

【Abstract】 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, according to the feature that the air temperature changes with outside environment, based on theoretical analysis, for saving energy, this paper research the varied frequency adjustment venting system because we design heat dissipation and ventilation system according to the worst outside environments.Secondly, under the circumstance of that the refrigerated containers are loaded in holds, the thesis designs the varied frequency control system (adoption of PID control) in the heat and venting system. The systematic features and designing methods are introduced; the simulation and modeling on main equipments, transducers and motors, is also introduced.Lastly, the mathematic model of the heat and venting control system by changing the fans’ rate is established in the instance of that the refrigerated containers are loaded in holds. Applying calculation and simulation technique on the whole venting system, and researching on varied frequency control system, MATLAB is used to attain this aim.The thesis mainly researches the automatic control technology (PID control), varied frequency simulation technique by MATLAB, and, uses the tool, MATLBA, to research the energy saving of the heat dispenser and venting system by applying varied rate fans for the constant rate fans, the variable air volume (VAV) for constant air volume (CAV).更多还原