Dynamic simulation of large systems
Journal Article
·
· International Chemical Engineering (A Quarterly Journal of Translations from Russia, Eastern Europe and Asia); (United States)
OSTI ID:6049070
- Osaka Univ. (Japan). Dept. of Information and Computer Science
- Osaka Univ. (Japan). Dept. of Chemical Engineering
The dynamic behavior of a chemical plant containing a large number of process variables with different response speeds is characterized by linearized ordinary differential equations with eigenvalues of widely varying magnitudes. An effective method of numerically integrating such large, stiff systems of equations is proposed. To minimize the size of the system of equations that need to be solved simultaneously, a steady-state approximation of some variables and partition into subsystems is adopted, incorporating the information about the eigenvalues of the linearized equations and qualitative physical information about the model. The eigenvalues are recalculated to reconfirm the validity of these two methods of reducing the number of dimensions. The proposed method is applied to a fuel-cell power plant with 31 ordinary differential equations, with an effective dynamic simulation being able to be performed.
- OSTI ID:
- 6049070
- Journal Information:
- International Chemical Engineering (A Quarterly Journal of Translations from Russia, Eastern Europe and Asia); (United States), Journal Name: International Chemical Engineering (A Quarterly Journal of Translations from Russia, Eastern Europe and Asia); (United States) Vol. 33:2; ISSN INCEAX; ISSN 0020-6318
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
20 FOSSIL-FUELED POWER PLANTS
200102 -- Fossil-Fueled Power Plants-- Power Cycles
30 DIRECT ENERGY CONVERSION
300500* -- Fuel Cells
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ANALOG SYSTEMS
CALCULATION METHODS
CHEMICAL PLANTS
CONTROL SYSTEMS
DESIGN
DIFFERENTIAL EQUATIONS
EIGENVALUES
EQUATIONS
FUEL CELL POWER PLANTS
FUNCTIONAL MODELS
FUNCTIONS
INDUSTRIAL PLANTS
PARAMETRIC ANALYSIS
POWER PLANTS
RESPONSE FUNCTIONS
SIMULATORS
STEADY-STATE CONDITIONS
200102 -- Fossil-Fueled Power Plants-- Power Cycles
30 DIRECT ENERGY CONVERSION
300500* -- Fuel Cells
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
ANALOG SYSTEMS
CALCULATION METHODS
CHEMICAL PLANTS
CONTROL SYSTEMS
DESIGN
DIFFERENTIAL EQUATIONS
EIGENVALUES
EQUATIONS
FUEL CELL POWER PLANTS
FUNCTIONAL MODELS
FUNCTIONS
INDUSTRIAL PLANTS
PARAMETRIC ANALYSIS
POWER PLANTS
RESPONSE FUNCTIONS
SIMULATORS
STEADY-STATE CONDITIONS