本文選題：螺旋繞管式換熱器 + 優(yōu)化設(shè)計(jì)　； 參考：《武漢工程大學(xué)》2015年碩士論文

【摘要】：螺旋繞管式換熱器是一種新式換熱器,與常用的換熱器相比優(yōu)勢(shì)明顯。它的緊湊型結(jié)構(gòu)利于換熱和防結(jié)垢。同時(shí)該換熱器能通過(guò)自身補(bǔ)償溫度,達(dá)到經(jīng)濟(jì)節(jié)能的要求。盡管早在上世紀(jì)初,就有人提出了相關(guān)的設(shè)計(jì)構(gòu)想,但要對(duì)其進(jìn)行精確的設(shè)計(jì)計(jì)算卻很難。目前我國(guó)對(duì)這種換熱器在研究、設(shè)計(jì)及制造等方面所作的工作還比較少,在通常的換熱器手冊(cè)中也沒(méi)有敘及此類換熱器的設(shè)計(jì)原理和設(shè)計(jì)步驟,只有少量文獻(xiàn)提及。像其他任何一種換熱器設(shè)計(jì)一樣,在工藝設(shè)計(jì)中螺旋繞管式換熱器管程及殼程中的兩相流問(wèn)題是最復(fù)雜的問(wèn)題之一。在對(duì)螺旋繞管式換熱器進(jìn)行設(shè)計(jì)計(jì)算時(shí),一方面采用與常規(guī)的設(shè)計(jì)方法,另一方面要結(jié)合實(shí)際的生產(chǎn)經(jīng)驗(yàn)。本論文通過(guò)借助計(jì)算機(jī)C#語(yǔ)言編寫程序,有效地簡(jiǎn)化了螺旋繞管式換熱器熱力設(shè)計(jì)中大量的計(jì)算。本文首先對(duì)螺旋繞管式換熱器的特點(diǎn)、結(jié)構(gòu)形式、工程應(yīng)用和使用管理做了介紹,并對(duì)其前景做了分析。借助常規(guī)的換熱器設(shè)計(jì)方法和制造經(jīng)驗(yàn),采用了優(yōu)化的逆流分段設(shè)計(jì)方法進(jìn)行設(shè)計(jì)。結(jié)合螺旋繞管式換熱器的幾何結(jié)構(gòu)對(duì)螺旋繞管式換熱器進(jìn)行了熱力設(shè)計(jì)理論分析,確立了管殼程傳熱膜系數(shù)的數(shù)學(xué)模型。在熱力計(jì)算分析中,確定了計(jì)算重點(diǎn)為換熱器的總傳熱系數(shù)、傳熱面積及壓力損失的計(jì)算。在運(yùn)用C#語(yǔ)言編寫程序之前,先繪制了程序運(yùn)行的流程圖,再輸入相關(guān)的物性參數(shù)和公式,編寫并調(diào)試程序。程序編寫完成后,運(yùn)用已知的工藝條件對(duì)程序進(jìn)行了校核,并與人工計(jì)算結(jié)果進(jìn)行對(duì)比,二者計(jì)算結(jié)果誤差較小,則驗(yàn)證程序編寫正確,保證了程序的準(zhǔn)確性。在運(yùn)用計(jì)算機(jī)計(jì)算程序簡(jiǎn)化計(jì)算的同時(shí),對(duì)制造換熱器的選材進(jìn)行了探討,結(jié)合不同材料的特點(diǎn),對(duì)一系列材料進(jìn)行了性能評(píng)價(jià),進(jìn)一步優(yōu)化了螺旋繞管式換熱器的設(shè)計(jì)。
[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.
【學(xué)位授予單位】：武漢工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ051.5

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