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米爾蜜兒銅蟲(chóng) (初入文壇)
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[求助]
英文翻譯求助 化工分離 多組分分離嚴(yán)格算法
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It is shown that the well-known and extensively used bubble-point methods, such as the one proposed by Wang and Henke for simulating vapor liquid multistage distillation problems, can be used efficiently for the simulation of other types of vapor liquid multistage separation problems, such as absorption and reboiled-absorption processes, even when the thermodynamic properties are a strong function of the composition. Via numerical simulations, it is shown that a robust bubble-point temperature iteration scheme provides convergence stability in the whole bubble-point method. The proposed robust bubble-point temperature iteration scheme is a combination of an equation decoupling method and a simultaneous method. This hybrid bubble-point temperature iteration scheme exploits the reliability of the equation decoupling method, which makes good convergence progress from a poor starting point.However, if the initial point in the bubble-point temperature calculation is good enough, only the equation decoupling method is used, to avoid excessive successive substitution steps when the separation factors are updated. As a consequence of the extension of the bubble-point method to simulate absorption cases, a didiagonal matrix with an off column is generated, when the interstage vapor rates are calculated. An efficient and simple algorithm derived from the Gaussian elimination method to solve the didiagonal matrix with an off column is presented. Results are reported for distillation, absorption, and reboiled-absorption processes, using the Soave Redlich Kwong equation of state.眾所周知泡點(diǎn)法已被科學(xué)界認(rèn)可和廣泛使用，如由王與亨克提出的模擬多級(jí)汽液蒸餾原理可以很好地用于其他類(lèi)型的汽液多級(jí)分離仿真模擬。例如吸收和再沸吸收過(guò)程，即使對(duì)于一個(gè)熱力學(xué)性質(zhì)組成非常復(fù)雜的系統(tǒng)，也可以通過(guò)數(shù)據(jù)模擬來(lái)進(jìn)行仿真實(shí)驗(yàn)。通過(guò)數(shù)據(jù)仿真實(shí)驗(yàn)結(jié)果表明，一個(gè)可靠的泡點(diǎn)溫度迭代方法可以保證在整個(gè)泡點(diǎn)法中收斂的穩(wěn)定性。以上提到的可靠泡點(diǎn)溫度迭代方法是由耦合方程和同步方程組合而成。這種混合泡點(diǎn)溫度迭代計(jì)劃利用方程耦合法的穩(wěn)定性，使得收斂問(wèn)題從一個(gè)差的起點(diǎn)有了很好的進(jìn)展。但是，如果在泡點(diǎn)溫度計(jì)算初始點(diǎn)是不夠好，只有使用方程耦合方法，當(dāng)分離因子被更新時(shí)才能避免過(guò)多的連續(xù)替代步驟。由于泡點(diǎn)法存在擴(kuò)展模擬吸收情況，當(dāng)計(jì)算級(jí)間汽率時(shí)會(huì)產(chǎn)生一個(gè)二對(duì)角矩陣和一個(gè)相關(guān)聯(lián)的列向量。一個(gè)高效簡(jiǎn)單的算法是用高斯消去法求解得出的二對(duì)角矩陣和關(guān)聯(lián)的列向量。蒸餾，吸收，再沸吸收過(guò)程使用S-R-K狀態(tài)方程來(lái)驗(yàn)證其結(jié)果。這是我粗淺的翻譯的，麻煩高人翻譯或者改正，這個(gè)讀不通的。 [ Last edited by 米爾蜜兒 on 2011-6-3 at 12:00 ] |
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