基于知识工程的换热器类型和强化传热形式合理化研究

发布时间：2018-01-28 09:37

本文关键词： 换热器选型材料强化传热技术能效评定方法管板轻量化设计　出处：《北京化工大学》2015年硕士论文　论文类型：学位论文

【摘要】：换热器是用于实现冷热介质热量交换的设备,它在化工、石油化工、核电、食品等工业领域均有广泛应用。虽然换热器具有相应设计标准,但换热器类型和材料较多,选取合适的类型和材料非常重要。另外,随着向换热器大型化的发展,换热器的轻量化设计越来越受到重视。本论文就换热器类型、材料、强化传热技术、能效评定方法的合理选择以及管板减薄等方面开展研究,总结如下：(1)基于知识工程的理论基础以及采→存→管→用的开发思路,确定换热器类型和强化传热技术合理选择软件开发的技术路线。通过查阅文献、专利、文档以及询问专家等途径归纳各种形式换热器的结构特点,并对常见材料、强化传热技术和能效评定方法进行总结,定义相应参数,采用Excel建立数据库。(2)运用Visual Studio编写换热器类型、材料、强化传热技术和能效评定方法的选择程序,设计换热器类型和强化传热技术合理选择软件的界面,完成软件的开发。该软件拥有换热器类型、材料和强化传热技术的合理选择以及对所选换热器类型进行能效评定等功能,实现知识工程在换热器设计中的应用。(3)换热器是特种设备,常见的设计方法有常规设计’和分析设计。本论文对一台U形管式换热器进行常规设计和有限元分析,并对比分析两种设计方法的结果。(4)对这台U形管式换热器进行轻量化设计。应用ANSYS建立有限元模型并进行强度分析。总结该换热器各部位的应力变化规律。确定在满足强度条件下换热器管板的最小厚度,从而达到减小设备重量、降低成本的目的。(5)基于VB和ANSYS设计开发出一套针对特定结构的换热器管板的分析计算软件。该软件采用交互式界面,可在后台调用ANSYS自动生成分析模型并进行分析计算。从而缩短换热器强度计算与轻量化设计周期。
[Abstract]:Heat exchangers are widely used in chemical, petrochemical, nuclear, food and other industries, although heat exchangers have corresponding design standards. However, there are many types and materials of heat exchangers, so it is very important to select suitable types and materials. In addition, with the development of large-scale heat exchangers, more and more attention is paid to the lightweight design of heat exchangers. This paper focuses on the types of heat exchangers. Materials, heat transfer enhancement techniques, reasonable selection of energy efficiency assessment methods and thinning of tube-plates are studied. The following is summarized as follows: 1) the theoretical basis of knowledge-based engineering and its adoption. 鈫扴torage. 鈫扵ube. 鈫扷sing the development ideas to determine the type of heat exchanger and enhanced heat transfer technology reasonable choice of the technical route of software development. The documents and experts are used to summarize the structural characteristics of various types of heat exchangers, and the common materials, heat transfer enhancement techniques and energy efficiency evaluation methods are summarized, and the corresponding parameters are defined. Excel is used to establish database. (2) Visual Studio is used to compile the selection program of heat exchanger type, material, heat transfer enhancement technology and energy efficiency evaluation method. The design of heat exchanger type and enhanced heat transfer technology reasonably select the interface of the software and complete the development of the software, which has the type of heat exchanger. The rational selection of materials and enhanced heat transfer technology and the evaluation of the energy efficiency of the selected heat exchangers are the special equipment to realize the application of knowledge engineering in the design of heat exchangers. The common design methods are conventional design and analytical design. In this paper, the conventional design and finite element analysis of a U-tube heat exchanger are carried out. The results of two design methods are compared and analyzed. The lightweight design of the U-tube heat exchanger is carried out. The finite element model and strength analysis are established by using ANSYS. The stress variation law of each part of the heat exchanger is summarized, and the heat exchanger under the condition of satisfying the strength is determined. The minimum thickness of the tube plate. Therefore, the purpose of reducing equipment weight and cost is achieved. (5) based on VB and ANSYS, a set of analysis and calculation software for heat exchanger tube and plate with specific structure is developed. The software adopts interactive interface. The analysis model can be automatically generated and calculated by calling ANSYS in the background, thus shortening the cycle of heat exchanger strength calculation and lightweight design.
【学位授予单位】：北京化工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.5

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