2004-01-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/661501摘要：這是一項第二年度的計劃。在第一年度的工作中，我們就駐波中的聲波微粒聚結現象，開發出一項理論分析模式。該模式由統御微粒顆數濃度隨微粒體積分佈、空間及時間變化的廣義動力方程式出發，假設微粒顆數濃度隨體積分佈呈對數常態分佈(log-normal distribution)，則我們可將廣義動力方程式此一微積分方程式(integral-differential equation)簡化為一偏微分方程式，而可大幅降低數值模擬所需的時間。此一簡化理論模式所獲結果與廣泛參數範圍的實驗結果吻合。本年度的首要工作將採用此一模式作聲波集塵器的參數分析及設計，進而研發以聲波聚結器為中心的高溫除塵裝置，並探討此一除塵裝置對提升IGCC發電系統效率的可行性，對淨煤與潔淨發電技術的研發有一定的貢獻。另外，上述聲波集塵器須配含離心分離器作有效的微粒移除，按照文獻離心分離器的有效操作溫度約 ，而IGCC發電系統的二相氣流溫度約 ，二者之差異將對IGCC發電系統的整體效率提昇有所限制。故本計劃的另一項工作為探討在不使用離心分離器的狀況下，直接用聲波去驅動微粒並進而在氣流中將之移除的可行性。<br> Abstract: This is the second term of a two-year project. A theoretical model for the acoustic coagulation of particles in a standing wave was developed successfully in the first year. The model starts from the general dynamic equation of the continuous distribution function of particles. The log-normal distribution of particles is assumed, and a resulting partial differential equation is obtained from the integral-differential general dynamic equation. The calculation time for solving such a resulting partial differential equation is of several orders less than solving the general dynamic equation. Numerical results of the present simplified model agree nicely with the experiments for quite a wide range of parameters. The primary work of the present project is to apply such model for the parameter analyses and the design of the acoustic agglomerator, its further application to the development of a high temperature particle removal system based on the acoustic agglomerator, and the application of such a particle removal system to the IGCC power system. The result of the project can be helpful to the development of the clean coal technology. Furthermore, the above particle removal device for the IGSS power system is consisted of an acoustic agglomerator and a cyclone. The maximum operation temperature of a standard cyclone is about , which is much less than , the temperature of the two-phase stream in the IGCC system. Such temperature difference imposes a limit on the overall efficiency of the system. Thus a second work of the present project is to carry out a feasible study of the removal of the particles using acoustic mean without the application of the cyclone in the particle removal system.聲波微粒聚結微粒移除理論模式數值模擬IGCC發電系統。acoustic coagulation of particlesparticle removaltheoretical modelnumerical calculationIGCC power system.