三元板式相变储能模块储放能性能研究

发布时间：2018-03-01 18:01

本文关键词： 相变储能技术相变模块储能工况放能工况数值模拟　出处：《湖南大学》2014年硕士论文　论文类型：学位论文

【摘要】：相变储能空调技术作为重要的空调节能技术，由于其节能效果和经济性较佳，研究越来越多样化，并且应用也越来越广。本文研究的主要对象是相变储能空调系统核心部件—板式相变储能模块，其性能直接影响到整个相变储能空调系统的性能。文中的相变储能模块物理模型相对复杂：矩形相变模块被分割成一定数量的相变平板，相邻相变平板间是换热流体通道，同时相变平板内嵌蛇形制冷剂管道。该模型的储放能过程是一个较复杂三维传热问题，，其求解必定需要做一些简化。对于文中相变模块传热问题的求解，我们采用显热容法模型。首先，在研究相变储能模块的放能工况时，针对模块的结构特征，我们对物理模型做出了简化，同时建立了相变储能模块的简化数学模型。在数值求解的过程当中，我们以相变储能空调系统放能工况下工作时间最大为出发点，同时考虑工艺施工难度等因素，研究不同相变平板厚度和风量值的最佳组合，从而确定相变储能模块的物理结构以及风机的选型。其次，在相变储能模块的物理结构和风机选型完成后，我们对不同室外空气温度下完成新风储能工况所需要的时间进行了求解。对于相变储能模块的压缩机制冷储能工况，我们通过采用Fluent模拟软件中的凝固熔化模型，对不同的蒸发温度下相变储能模块完成储能过程所需要的时间进行数值模拟，从而确定系统的压缩机制冷蓄冷工况的工作时间。本文主要是针对相变储能模块的储放能性能进行理论研究，将为相变储能空调系统的设计和开发打下坚实的基础。
[Abstract]:As an important energy saving technology for air conditioning, phase change energy storage air conditioning technology is more and more diversified because of its better energy efficiency and economy. And the application is more and more extensive. The main object of this paper is the core component of phase-change energy storage air conditioning system-plate type phase change energy storage module. The physical model of the phase change energy storage module in this paper is relatively complex: the rectangular phase change module is divided into a certain number of phase change plates, and the adjacent phase change plate is a heat transfer fluid channel. The energy storage and discharge process of the model is a complicated three-dimensional heat transfer problem, and its solution must be simplified. We adopt the sensible heat capacity model. First of all, we simplify the physical model and establish the simplified mathematical model of the phase change energy storage module according to the structural characteristics of the module when studying the discharge condition of the phase change energy storage module. Based on the maximum working time of phase change energy storage air conditioning system under the condition of energy release, the optimum combination of the thickness and wind value of different phase change plate is studied by considering the factors such as the difficulty of process construction and so on. In order to determine the physical structure of phase change energy storage module and fan selection. Secondly, after the physical structure of the phase change energy storage module and the type selection of the fan are completed, the time required to complete the fresh air energy storage at different outdoor air temperatures is solved. By using the solidification melting model in the Fluent simulation software, the time required to complete the energy storage process of the phase change energy storage module at different evaporation temperatures is numerically simulated, so as to determine the working time of the refrigeration and cold storage condition of the system. This paper mainly focuses on the theoretical study of the energy storage and discharge performance of phase change energy storage module, which will lay a solid foundation for the design and development of phase change energy storage air conditioning system.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB657.2

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