A Computational Workbench Environment for Virtual Power Plant Simulation

Abstract

This is the eighth Quarterly Technical Report for DOE Cooperative Agreement No: DE-FC26-00NT41047. The goal of the project is to develop and demonstrate a computational workbench for simulating the performance of Vision 21 Power Plant Systems. Within the last quarter, good progress has been made on all aspects of the project. Calculations for a full Vision 21 plant configuration have been performed for two coal types and two gasifier types. Good agreement with DOE computed values has been obtained for the Vision 21 configuration under "baseline" conditions. Additional model verification has been performed for the flowing slag model that has been implemented into the CFD based gasifier model. Comparisons for the slag, wall and syngas conditions predicted by our model versus values from predictive models that have been published by other researchers show good agreement. The software infrastructure of the Vision 21 workbench has been modified to use a recently released, upgraded version of SCIRun.

A Computational Workbench Environment for Virtual Power Plant Simulation

“…For simplicity, the discussion items are presented in the order of the Tasks as outlined in our detailed Work Plan. [Bockelie et al, 2001] that described our accomplishments in Year One and outlined our plans for Year Two and Year Three. The paper included a thorough description of the models included in the workbench, the capabilities and functionality of the workbench and the software tools and techniques used to create the workbench.…”

Modelling, simulation and design of an integrated radiant syngas cooler and steam methane reformer for use with coal gasification

“…There are numerous WGS kinetic models available for catalyst based systems that operate below 450°C [12] but few are available for homogenous reaction systems such as for gasification chambers. However, the homogenous kinetics for WGS in a combustion environment is used in this work and is given as follows [13,14]:…”

“…Note that in the above equation, the concentration and pre-exponential factor are in the units of kmol/m 3 and m 3 /kmol.s respectively that will have to be changed to the required units of mol/m 3 .s for the r i term. The equilibrium constant is given by the following equation [14]: …”

Dynamic simulation and control of an integrated gasifier/reformer system. Part I: Agile case design and control

“…The exact temperature of the gasifier syngas is a complex product of the gasification conditions and coal feedstock properties and feed flow rates, and Bockelie et al (2004) mention that the gasifier can have an exit temperature between 1,422 K and 1,644 K. As a reasonable estimate of the temperature variation in the coal-derived syngas gasifier exit temperature (prior to entering the RSC), case 2a implements a 50 K step increase in , while case 2b implements a 50 K step reduction in .…”