(完整版)翅片管換熱器基礎(chǔ)資料

第五講熱物性參數(shù)和單位主講人：哈爾濱工業(yè)大學(xué)劉紀(jì)福教授在第四講中，介紹了與翅片管相關(guān)的計(jì)算式，其中，多次應(yīng)用流體的物性參數(shù)，如流體的密度，粘度，導(dǎo)熱系數(shù)，等等。每一種流體都有它自己的獨(dú)特的物理參數(shù)，就像生物科學(xué)中的“基因”一樣，這些物性參數(shù)構(gòu)成了流體本身區(qū)別于其它流體的特性。例如，大家所熟知的空氣和水，物理性質(zhì)是截然不同的，拿密度而言，在常溫下水的密度為1000kg/m3；而空氣的密度僅為1.2kg/m3.左右。與熱有關(guān)的物性叫熱物性，由于流體的熱物性對(duì)傳熱和阻力都有極大的影響，而且是計(jì)算和設(shè)計(jì)中不可缺少的數(shù)據(jù)，因而本講將要介紹幾種常用流體的熱物性參數(shù)。應(yīng)當(dāng)指出，幾乎所有的物性參數(shù)都是通過大量的細(xì)致的實(shí)驗(yàn)得出來的，并有相關(guān)的專著可供選用。1空氣，煙氣，水，水蒸氣的熱物理性質(zhì)表?？紤]到翅片管換熱器的應(yīng)用特點(diǎn)，管外翅片側(cè)主要與空氣或煙氣打交道，而管內(nèi)流動(dòng)的主要是水和水蒸氣，偶爾也有其他流體，如制冷劑等。所以下面給出的熱物性表基本上能滿足翅片管換熱器的計(jì)算要求。見下面相關(guān)附錄附錄8干空氣的熱物理性質(zhì)附錄9大氣壓力下煙氣的熱物理性質(zhì)附錄10飽和水的熱物理性質(zhì)附錄11干飽和水蒸氣的熱物理性質(zhì)附錄13幾種飽和液體的熱物理性質(zhì)

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附錄9天氣壓力（p=1.01325xW5PR下

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