二氧化碳输送过程的优化.pdfVIP

39 3 西 安 交 通 大 学 学 报 Vol. 39 l 3 2005 3 JOU RNAL OF XIcAN JIAOT ONG U NIVERSIT Y M ar. 2005 张早校, 冯 霄 ( , 7100 9, ) : 针对以超临界和液体方式输送 CO2 的问题, 考虑环 温度变化对CO2 输送管道设计的影响, 采用 ASPEN PLU S 101 1 软件对输送管道直径和加压站数目进行了定量分析和优化设计. 结果表明, 采用液体输 2 送方式可以降低系统能耗和成本. 在绝热和相同入口压力条件下, 一次加压后的许用距离随着管道 CO 入 口温度的升高近似线性减小. 在同等条件下, 管道等温输送比绝热输送减少的输送距离随管道 CO2 入口温 度的升高而增大, 但CO2 在入口为液态时的输送距离差别则很小. : 二氧化碳; 管道输送; 环 温度; 热交换 : TB126 : A : 0253O987X( 2005) 03O027 O0 Optimizati on of CO Transmission Processes 2 Zhang Zaoxiao, Feng X iao ( School of Energy and Pow er Engineering, Xic an Jiaotong U niversity, Xican 7100 9, China) Abstract: Tw o CO2 transport schemes, i. e. , supercritical-transport and subcooling-transport, are simula- ted by means of ASPEN PLUS 101 1, and the pipe diameter and the number of the repressurization stations are optimized based on energy and cost efficiency . The results show that subcooling-transport scheme max- imizes the energy efficiency and minimizes the cost of CO2 transport system for CO2 sequestration. The permitted transport distance decreases almost linearly w ith the increase of pipe inlet CO2 temperature under the same pipe inlet pressure and adiabatic conditions. A comparison of CO2 transmissions in isothermal condition w ith that of adiabatic condition indicates that the reduced distance rises w ith the increase of pipe inlet CO2 temperature in the same conditions. T here is a tiny difference betw een isothermal and adiabatic transmissions w hen the pipe inlet CO2 is in liquid state. Keywords: CO2; p ip eline transmission; ambient temp