Development of Combustor Unit Operation Extension Using FORTRAN DLL Integration in Aspen HYSYS
Project Description
This project focuses on the development of a custom combustor unit operation extension in Aspen HYSYS, designed to simulate the combustion of natural gas in a simplified and non-rigorous manner. The extension demonstrates how advanced customization can be achieved by linking external computational code into HYSYS using a FORTRAN Dynamic Link Library (DLL). This allows users to extend the functionality of HYSYS beyond its built-in unit operations.
The combustor model is primarily intended for educational and demonstration purposes. It provides a simplified representation of combustion processes, enabling users to understand energy balance, fuel-air reactions, and system integration within process simulation environments. The model does not aim for high-fidelity combustion kinetics but instead focuses on demonstrating extensibility and integration techniques.
A key feature of this project is the integration of FORTRAN code through a DLL interface, which enables external calculation routines to interact directly with Aspen HYSYS. This approach showcases how legacy programming languages can still be effectively used in modern simulation environments to build customized unit operations.
Process Flow Diagarm
Optimization Strategy
The operational strategy of this project is based on extending the native capabilities of Aspen HYSYS by integrating externally developed computational models. By using a FORTRAN-based DLL, the combustor unit operation is able to perform customized calculations that are not available in standard HYSYS modules. This enhances the flexibility of process modeling and allows users to simulate specialized systems.
Another important aspect of the strategy is ensuring smooth communication between Aspen HYSYS and the external FORTRAN code. This is achieved through structured data exchange, where input stream properties are passed to the DLL, processed, and then returned as output stream conditions. This integration ensures consistency and enables seamless simulation of the combustion process.
FORTRAN DLL Integration Method
This strategy involves linking Aspen HYSYS with an external FORTRAN Dynamic Link Library. The DLL performs combustion-related calculations and returns resultsto the simulation environment, enabling custom unit operation development.
Simplified Combustion Modeling Approach
In this approach, combustion is modeled in a non-rigorous manner, focusing on overall energy and mass balance rather than detailed reaction kinetics. This makes the model suitable for educational and conceptual understanding.
Data Exchange Between HYSYS and External Code
This strategy focuses on transferring input and output data between HYSYS and the FORTRAN DLL. Stream properties such as flowrate, composition, and temperature are processed externally and then reintegrated into the simulation
Projects Insight
Importance of Custom Unit Operations
- Extends HYSYS functionality
- Enables specialized simulations
- Supports advanced process modeling
Role of FORTRAN in Engineering
- Efficient numerical computation
- Widely used in legacy systems
- Compatible with simulation tools
DLL-Based Integration
- Connects external code to HYSYS
- Enables flexible model development
- Supports modular design
Simplified Combustion Representation
- Focuses on energy balance
- Avoids complex kinetics
- Useful for conceptual analysis
Limitations of the Model
- Not suitable for detailed reaction studies
- Requires careful validation
- Intended for educational use
Practical Applications
- Process simulation training
- Energy system analysis
- Engineering education and research
Conclusion
The combustor unit operation extension using FORTRAN DLL integration in Aspen HYSYS demonstrates a powerful method for enhancing simulation capabilities through external programming. By combining simplified combustion modeling with advanced software integration techniques, the project provides a flexible and educational tool for understanding process behavior. Although it is not designed for rigorous industrial design, it serves as a valuable framework for learning custom unit operation development and software extensibility.