螺旋绕管式换热器的优化设计

发布时间：2018-05-02 19:55

本文选题：螺旋绕管式换热器 + 优化设计　；参考：《武汉工程大学》2015年硕士论文

【摘要】：螺旋绕管式换热器是一种新式换热器,与常用的换热器相比优势明显。它的紧凑型结构利于换热和防结垢。同时该换热器能通过自身补偿温度,达到经济节能的要求。尽管早在上世纪初,就有人提出了相关的设计构想,但要对其进行精确的设计计算却很难。目前我国对这种换热器在研究、设计及制造等方面所作的工作还比较少,在通常的换热器手册中也没有叙及此类换热器的设计原理和设计步骤,只有少量文献提及。像其他任何一种换热器设计一样,在工艺设计中螺旋绕管式换热器管程及壳程中的两相流问题是最复杂的问题之一。在对螺旋绕管式换热器进行设计计算时,一方面采用与常规的设计方法,另一方面要结合实际的生产经验。本论文通过借助计算机C#语言编写程序,有效地简化了螺旋绕管式换热器热力设计中大量的计算。本文首先对螺旋绕管式换热器的特点、结构形式、工程应用和使用管理做了介绍,并对其前景做了分析。借助常规的换热器设计方法和制造经验,采用了优化的逆流分段设计方法进行设计。结合螺旋绕管式换热器的几何结构对螺旋绕管式换热器进行了热力设计理论分析,确立了管壳程传热膜系数的数学模型。在热力计算分析中,确定了计算重点为换热器的总传热系数、传热面积及压力损失的计算。在运用C#语言编写程序之前,先绘制了程序运行的流程图,再输入相关的物性参数和公式,编写并调试程序。程序编写完成后,运用已知的工艺条件对程序进行了校核,并与人工计算结果进行对比,二者计算结果误差较小,则验证程序编写正确,保证了程序的准确性。在运用计算机计算程序简化计算的同时,对制造换热器的选材进行了探讨,结合不同材料的特点,对一系列材料进行了性能评价,进一步优化了螺旋绕管式换热器的设计。
[Abstract]:Spiral-wound tube heat exchanger is a new type of heat exchanger, which has obvious advantages over common heat exchangers. Its compact structure is conducive to heat transfer and anti-scaling. At the same time, the heat exchanger can compensate the temperature by itself to achieve the requirement of economic energy saving. Although some people put forward related design ideas as early as the beginning of last century, it is difficult to carry out accurate design calculation. At present, the research, design and manufacture of this kind of heat exchanger in our country are relatively few, and the design principle and design steps of this kind of heat exchanger are not described in the general heat exchanger manual, only a few references are mentioned. Like any other heat exchanger design, the two-phase flow problem in the tube and shell of the spiral heat exchanger is one of the most complex problems in the process design. In the design and calculation of spiral wound tube heat exchanger, on the one hand, the conventional design method should be adopted, on the other hand, the actual production experience should be combined. In this paper, a large number of calculations in the thermal design of spiral wound tube heat exchangers are simplified by programming with the help of computer C # language. In this paper, the characteristics, structure, engineering application and management of spiral wound tube heat exchanger are introduced, and its prospect is analyzed. Based on the conventional heat exchanger design method and manufacturing experience, the optimized countercurrent section design method is used to design the heat exchanger. Combined with the geometry of the spiral tube heat exchanger, the thermal design theory of the spiral wound tube heat exchanger is analyzed, and the mathematical model of the heat transfer film coefficient of the tube and shell side is established. In the thermodynamic calculation and analysis, the emphasis of calculation is the calculation of the total heat transfer coefficient, heat transfer area and pressure loss of the heat exchanger. Before using C # language to write the program, the flow chart of the program running is drawn first, then the relevant physical parameters and formulas are input, and the program is written and debugged. After the program is completed, the program is checked by using the known process conditions, and compared with the result of manual calculation. If the error between the two results is small, the program is verified to be correct and the accuracy of the program is ensured. At the same time, the selection of materials for manufacturing heat exchangers is discussed, and a series of materials are evaluated in combination with the characteristics of different materials, and the design of spiral wound heat exchangers is further optimized.
【学位授予单位】：武汉工程大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TQ051.5

【参考文献】