發(fā)布時(shí)間：2018-02-28 15:00

  本文關(guān)鍵詞： 螺旋折流板 換熱器 殼程傳熱系數(shù)和壓降 軟件開發(fā) 計(jì)算公式　出處：《北京化工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：換熱器在國(guó)民經(jīng)濟(jì)和工業(yè)生產(chǎn)領(lǐng)域中對(duì)能量利用率以及系統(tǒng)的經(jīng)濟(jì)性和可靠性起著舉足輕重的作用。隨著我國(guó)石油、化工加工能力的增加,降低煉油成本、減少裝置的能耗、節(jié)約設(shè)備投資越來越受到生產(chǎn)企業(yè)的重視。換熱設(shè)備占石油、化工裝置設(shè)備投資的20%-30%,在裝置運(yùn)行過程中每年都需要更換、維修,因此,提高其利用率,對(duì)裝置和企業(yè)的影響是巨大的。20世紀(jì)60年代,基于改變折流板布置方式的角度螺旋折流板換熱器的思想被提出。將折流板布置成近似的螺旋面,使螺旋折流板換熱器實(shí)現(xiàn)了殼側(cè)流體連續(xù)的螺旋狀流動(dòng),以達(dá)到降低殼側(cè)的流動(dòng)阻力及強(qiáng)化流體傳熱的目的。90年代出現(xiàn)了這種改變折流板角度的管殼式換熱器的商業(yè)產(chǎn)品。問世雖有近二十年,對(duì)這類螺旋面螺旋折流板換熱器的傳熱性能研究卻很少見到公開報(bào)道。本文基于以上的現(xiàn)實(shí)情況,對(duì)螺旋折流板換熱器不同螺旋角下殼程傳熱系數(shù)及壓降進(jìn)行了研究,通過實(shí)驗(yàn)數(shù)據(jù)總結(jié)歸納出適用于不同螺旋角的螺旋折流板換熱器殼程傳熱系數(shù)及壓降的計(jì)算模型,對(duì)結(jié)構(gòu)相似的螺旋折流板換熱器和弓形折流板換熱器進(jìn)行性能對(duì)比,通過程序設(shè)計(jì),完成螺旋折流板換熱器選型軟件的開發(fā),并能應(yīng)用于工業(yè)設(shè)計(jì)和生產(chǎn)制造中。該研究可為螺旋折流板的系列化和工業(yè)化提供試驗(yàn)上和理論上支持,為進(jìn)一步的開發(fā)新型高效的管殼式換熱器提供了一定的理論指導(dǎo)作用。
[Abstract]:Heat exchangers play an important role in the field of national economy and industrial production as well as the economy and reliability of the system. With the increase of petroleum and chemical processing capacity in China, the refining cost is reduced and the energy consumption of the unit is reduced. More and more attention is paid to saving investment in equipment. Heat transfer equipment accounts for 20% -30% of the investment in chemical plant equipment. It needs to be replaced and maintained every year during the operation of the plant, therefore, the utilization ratio is improved. In 60s of the 20th century, the idea of an angle helical baffle heat exchanger based on changing the arrangement of baffles was proposed, and the baffle plate was arranged as an approximate helical surface. The helical baffle heat exchanger realizes the continuous helical flow of the shell side fluid. In order to reduce the flow resistance on the shell side and to enhance the fluid heat transfer, the commercial products of the tube and shell heat exchanger with changing baffle angle appeared in the 1990s. In this paper, the heat transfer coefficient and pressure drop of the helical baffle heat exchanger under different helical angles are studied based on the actual situation mentioned above, but the heat transfer performance of this kind of helical baffle heat exchanger is seldom reported. The calculation models of heat transfer coefficient and pressure drop of spiral baffle heat exchangers with different helical angles are summarized through experimental data. The performances of spiral baffle heat exchangers with similar structure are compared with those of curved baffle heat exchangers. Through program design, the software of heat exchanger selection for spiral baffle is developed, and it can be used in industrial design and manufacture. The research can provide experimental and theoretical support for serialization and industrialization of spiral baffle. It provides some theoretical guidance for the further development of new and efficient tube and shell heat exchangers.
【學(xué)位授予單位】：北京化工大學(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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