ENG. ANDREW OMWENGA
Chemical & Process Simulation Engineer • Thermodynamic Specialist
Industrial Steam Power Plant & Rankine Cycle Energy Optimization
Section 1.0 — Simulation & Facility Metadata
Section 2.0 — Executive Summary
Thermodynamic simulation of an industrial combined heat and power (CHP) steam plant in Aspen HYSYS, optimizing turbine extraction pressures, boiler efficiency, and condenser cooling.
Section 3.0 — Problem Statement & Operating Bottlenecks
Industrial steam networks often suffer from uncoordinated pressure letdown across control valves, resulting in lost power generation potential.
Section 4.0 — Objectives & Rigorous Simulation Methodology
Aspen HYSYS steam package model utilizing ASME Steam Tables. HP steam generated at 60 bar, 480 °C, with medium-pressure extraction at 12 bar and low-pressure extraction at 3.5 bar.
Section 5.0 — Simulation Results & Thermodynamic Findings
Replacing letdown stations with extraction turbines captured an additional 2.4 MW of power without increasing boiler fuel consumption.
Section 6.0 — Core Engineering Takeaways
Section 7.0 — Model Assumptions & Future Recommendations
Turbine isentropic efficiency assumed constant at 84% across varying seasonal load demands.
Integration of biomass co-firing thermodynamic balances into boiler combustion models.
Section 8.0 — Consultant Conclusion & Verification Sign-off
Optimizing steam distribution networks with backpressure turbines significantly increases industrial facility energy efficiency.
