A TRIDIAGONAL MATRIX MODEL FOR MULTISTAGE FLASH DESALINATION PLANTS

被引:74
作者
HELAL, AM
MEDANI, MS
SOLIMAN, MA
FLOWER, JR
机构
[1] KING SAUD UNIV,COLL ENGN,RIYADH,SAUDI ARABIA
[2] UNIV LEEDS,DEPT CHEM ENGN,LEEDS LS2 9JT,W YORKSHIRE,ENGLAND
关键词
CHEMICAL PLANTS - Computer Simulation - MATHEMATICAL TECHNIQUES - Nonlinear Equations;
D O I
10.1016/0098-1354(86)87003-X
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
An efficient and reliable technique has been developed to solve the large system of non-linear equations which describe the behaviour of multistage flash (MSF) desalination plants. The new method depends on decomposition of the equations, after linearization, into subsets which are grouped by type rather than by stage, followed by formulation of the enthalpy balance equations into a tridiagonal matrix (TDM) form which is solved by the Thomas algorithm. The computer program developed in this work converged rapidly over a wide range of conditions, showing significant reduction in run times relative to those required by previous stage-by-stage approaches. Both recirculatory and once-through type plants have been simulated for different practical operating situations. The development of the linearized equations is discussed in detail, all physical property correlations are documented and full details of a numerical example given.
引用
收藏
页码:327 / 342
页数:16
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