本文選題：海水淡化 + 板式蒸發(fā)器�。� 參考：《熱力發(fā)電》2017年09期

【摘要】：板式蒸發(fā)器越來(lái)越多地用于海水淡化系統(tǒng)中,但因其海水蒸發(fā)過(guò)程涉及復(fù)雜的兩相流,通過(guò)數(shù)值模擬的方法研究仍存在一些難題。對(duì)板式蒸發(fā)器內(nèi)相鄰兩互相倒置的人字形波紋板間的流道建立三維物理數(shù)學(xué)模型,使用計(jì)算流體力學(xué)(CFD)方法研究海水在人字形波紋板間流道內(nèi)的流動(dòng)蒸發(fā)傳熱情況,分析人字形波紋板傾斜角和波紋板高度對(duì)海水在板式蒸發(fā)器內(nèi)流動(dòng)蒸發(fā)傳熱性能的影響。結(jié)果表明:由于觸點(diǎn)的存在,產(chǎn)生較強(qiáng)的湍流;沿流動(dòng)方向水蒸氣質(zhì)量分?jǐn)?shù)不斷增加,海水質(zhì)量分?jǐn)?shù)不斷減少;波紋板高度越大越有利于海水蒸發(fā)時(shí)水蒸氣的擴(kuò)散,這種優(yōu)勢(shì)在流道入口速度大時(shí)更加明顯;波紋板傾角為60°時(shí)的板片換熱性能高于波紋傾角為30°的板片。該研究結(jié)果可為低溫多效蒸餾板式海水淡化技術(shù)發(fā)展提供參考。
[Abstract]:Plate evaporators are more and more used in desalination systems, but because the evaporation process involves complex two-phase flow, there are still some difficulties in numerical simulation. A three-dimensional physical mathematical model was established for the flow channels between two adjacent inverted herringbone corrugated plates in a plate evaporator. The flow evaporation heat transfer of seawater in the channel between herringbone corrugated plates was studied by computational fluid dynamics (CFD) method. The effects of the inclined angle and the height of the corrugated plate on the heat transfer performance of seawater flow evaporation in a plate evaporator are analyzed. The results show that due to the existence of contact point, strong turbulence is produced; the mass fraction of water vapor increases continuously and the mass fraction of seawater decreases along the flow direction; the higher the height of corrugated plate is, the better the diffusion of water vapor is when seawater evaporates. This advantage is more obvious when the inlet velocity of the channel is large, and the heat transfer performance of the corrugated plate with a dip angle of 60 擄is higher than that of the plate with a corrugated inclination angle of 30 擄. The results can provide a reference for the development of plate desalination technology of low temperature multi-effect distillation.
【作者單位】： 神華國(guó)華(北京)電力研究院有限公司;中國(guó)電力工程有限公司;華北電力大學(xué)電站設(shè)備狀態(tài)監(jiān)測(cè)與控制教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(U1361108)~~
【分類(lèi)號(hào)】：P747.1

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