Numerical prediction of load changes in a coal-fired utility boiler

摘要

The present work deals with the numerical transinet simulation of load changes in a pulverised coal-fired utility biler. The boiler is a tangential firing system with an electrical outpout of 750 MW. The code used for the calculations is the in-house developed 3D combustion code AIOLOS. The implemented solution procedure is based on either the well-known SIMPLEC method (Semi Implicit Method for Pressure Linked Equations Consistent) or the PISO approach (Pressure Implicit with Splitting of Operators). The stability of the procedure is indenpendent of the time step, since an implicit temportal discretisation scheme (Euler Implicit) is used. A validation exericise is presented by comparing the numerical results with temperature measurements available from LSE (Lehrstuhl fur Systemtheorie in der Elektrotechnik), Saarland University, Saarbruken.