
露點壓力
While below the dew point pressure, the gas-liquid mixed adsorption model is adopted if the retrograde condensate oil saturation higher than the critical flow saturation of condensate oil;
當壓力低于露點壓力時,若反凝析油飽和度小于凝析油的臨界流動飽和度,采用氣液混合吸附模型來進行計算;
When the pressure is higher than the dew point, the system of condensate gas is gas phase, so the theory model of cavern solution should be use to compute gas adsorption.
當體系壓力在露點壓力以上時,凝析氣體系為氣态,應采用空穴溶液理論模型計算氣體吸附。
Gas injection may make dew point of condensate gas increase. The long-core experiments show that the higher the pressure upkeep is, the higher condensate oil recovery is.
注氣可使凝析氣露點有所升高,長岩心實驗表明保持壓力越高凝析油采收率越高。
The principle of production of low-dew-point nitrogen by pressure swing adsorption(PSA) was described, and the application in the manufacture of silicone rubber was introduced.
介紹了變壓吸附法制低露點氮氣的基本原理及在熱硫化矽橡膠生膠生産中的應用。
A cladding which is to a large extent resistant to dew-point corrosion is also envisaged for the lower area of the gasifier (REACTOR) pressure vessel in the zone affected by the Slag Bath.
基本針對露點腐蝕的複合層還面臨着氣化爐(反應器)受渣池影響的較低區域。
露點壓力(dew point pressure)是熱力學和油氣工程領域的重要概念,指在恒定溫度下,氣體混合物中某一組分開始從氣相冷凝為液相時的臨界壓力值。該參數廣泛應用于天然氣處理、凝析氣藏開發及工業流程設計。
在單一組分系統中,露點壓力等同于該物質的飽和蒸氣壓。對于多組分混合物(如含烴類氣體),露點壓力需要通過相平衡方程計算。以天然氣為例,當系統壓力降低至露點壓力以下時,重組分烴類(如戊烷、己烷)會率先凝結形成液滴。
行業标準GB/T 26981-2011《凝析氣藏流體物性分析方法》規定了露點壓力的實驗室測定流程,采用恒質膨脹實驗結合激光檢測技術。工程計算常用Peng-Robinson狀态方程,其基本形式為: $$ P = frac{RT}{v-b} - frac{aα}{v(v+b)+b(v-b)} $$ 其中$a$、$b$為組分特征參數,$α$與溫度相關。
dew point pressure(露點壓力) 是工程和物理化學中的專業術語,具體含義如下:
在恒定溫度下,氣體混合物開始從氣相凝結出第一滴液滴時的壓力。例如,在油氣藏開發中,當天然氣壓力降低至露點壓力時,會析出液态烴(凝析油)。
在相态圖中,露點壓力與泡點壓力(bubble point pressure)對應,前者是氣相開始凝結液體的臨界壓力,後者是液相開始析出氣體的臨界壓力。
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