【正文】 現(xiàn)已廣泛用于食品、制藥、合成纖維、石油化工、動(dòng)力機(jī)械、船舶、動(dòng)力、供熱等各行業(yè)。 板式換熱器是以波紋板的新型高效換熱器。 Check 蘭州交通大學(xué)畢業(yè)設(shè)計(jì) (論文 ) 目錄 1. 緒論 ............................................................................................................................... 1 板式換熱器的學(xué)術(shù)背景及意義 ......................................................................... 1 我國(guó)設(shè)計(jì)制造應(yīng)用情況 ..................................................................................... 3 國(guó)外著名廠家及其產(chǎn)品 ..................................................................................... 4 板式換熱器的國(guó)內(nèi)研究進(jìn)展 ............................................................................. 7 2. 板 (片 )式換熱器的基本構(gòu)造 ......................................................................................... 9 板 (片 )式換熱器的基本構(gòu)造 ............................................................................... 9 流程組合 ............................................................................................................. 9 框架型式 ........................................................................................................... 11 板片 .................................................................................................................... 12 常用形式 ................................................................................................ 12 混合 ? 人字板及性能 ............................................................................ 13 特種形式 ................................................................................................ 15 密封墊片 ........................................................................................................... 15 焊接式板式換熱器 ........................................................................................... 16 半焊式板式換熱器 ................................................................................ 16 全焊接式板式換熱器 ............................................................................ 17 3. 板式換熱器的性能特點(diǎn) ............................................................................................. 17 板式換熱器的主要優(yōu)點(diǎn) ................................................................................... 18 板式換熱器的主要缺點(diǎn) ................................................................................... 20 板式換熱器與管殼式換熱器的比較 ............................................................... 20 4. 板式換熱器熱力及相關(guān)計(jì)算 ..................................................................................... 21 板式換熱器的設(shè)計(jì)計(jì)算概述 ........................................................................... 21 傳熱過(guò)程 ........................................................................................................... 22 對(duì)流換熱 ................................................................................................ 22 蘭州交通大學(xué)畢業(yè)設(shè)計(jì) (論文 ) 相變換熱 ................................................................................................ 23 導(dǎo)熱 ......................................................................................................... 24 熱力計(jì)算 ........................................................................................................... 24 一般設(shè)計(jì)要求 ........................................................................................ 24 設(shè)計(jì)計(jì)算公式和曲線 ............................................................................ 27 確定總傳熱系數(shù)的途徑 ........................................................................ 31 設(shè)計(jì)工藝條件 ........................................................................................... 32 計(jì)算綜述表 ............................................................................................ 36 5. 經(jīng)濟(jì)與技術(shù)分析 ......................................................................................................... 43 技術(shù)經(jīng)濟(jì)分析的原則 ....................................................................................... 43 技術(shù)經(jīng)濟(jì)分析的標(biāo)準(zhǔn) ....................................................................................... 43 結(jié)論 .................................................................................................................................. 44 致謝 .................................................................................................................................. 45 參考文獻(xiàn) .......................................................................................................................... 46 蘭州交通大學(xué)畢業(yè)設(shè)計(jì) (論文 ) 1 1. 緒論 板式換 熱器的學(xué)術(shù)背景及意義 目前板式換熱器已成為高效、緊湊的熱交換設(shè)備，大量地應(yīng)用于工業(yè)中 ,它的發(fā)展已有一百多年的歷史。 Thermodynamic calculation。 for the phasechange heat transfer, the vast majority of products, yet can not provide the corresponding correlation. In this paper, by the using of plate heat exchanger heat transfer mechanism the development of plate heat exchanger and applications are briefly carried out the plate heat exchanger thermal calculation and resistance calculations, and designed the basic structure of the plate heat exchanger such as the frameworks, structure and processes binations to meet the verification it determined the parallel flow plate heat exchanger with 149 of the plates and bined with Auto CAD drawing parts diagram and assembly drawings. Keywords: Plate heat exchanger。確定了板片數(shù)為 149的并聯(lián)式流程組合的板式換熱器，用 Auto CAD 繪制零件圖及總圖。 本文對(duì)板式換熱器的發(fā)展及應(yīng)用領(lǐng)域作了 簡(jiǎn)要的介紹，通過(guò)應(yīng)用板式換熱器的傳熱機(jī)理。對(duì)于任何一種新型結(jié)構(gòu)尺寸板片的傳熱及阻力特性，都只有通過(guò)實(shí)驗(yàn)計(jì)算測(cè)定。焊接型板式換熱器的緊湊性好，重量輕、傳熱性能好、初始成本低特點(diǎn)。蘭州交通大學(xué)畢業(yè)設(shè)計(jì) (論文 ) 板式換熱器畢業(yè)設(shè)計(jì)論文 摘要 板式換熱器是一種高效緊湊的換熱設(shè)備，它被應(yīng)用到食品工業(yè)、冶金工業(yè)、機(jī)電工業(yè)、造紙工業(yè)、石油工業(yè)等領(lǐng)域。而且其類型、結(jié)構(gòu)和使用范圍還在不斷發(fā)展。 板式換熱器的傳熱性能與板面的波紋形狀、尺寸及板面組合方式都有密切關(guān)系。對(duì)于無(wú)相變傳熱，多數(shù)制造商都能提供關(guān)聯(lián)式；對(duì)于相變傳熱，絕大多數(shù)的產(chǎn)品，尚不能提供相應(yīng)的關(guān)聯(lián)式。對(duì)板式換熱器進(jìn)行了熱力計(jì)算和阻力計(jì)算，在滿足了校核條件下，設(shè)計(jì)了板式換熱器的基本結(jié)構(gòu)如框架形式，板片結(jié)構(gòu)及流程組合方式等結(jié)構(gòu)參數(shù)。 關(guān)鍵字： 板式換熱器；結(jié)構(gòu)設(shè)計(jì)；熱力計(jì)算；阻力計(jì)算；校核 蘭州交通大學(xué)畢業(yè)設(shè)計(jì) (論文 ) Abstract Plate heat exchanger is a pact and efficient heat transfer equipment, it is applied to the food industry, metallurgical industry, electromechanical industry, paper industry, oil i