Refinery Crude Preheating & Energy Recovery Network
Pinch analysis and heat exchanger network (HEN) retrofit for a crude distillation unit to maximize cross-stream heat recovery.
1. Project Overview & Context
Pinch analysis and heat exchanger network (HEN) retrofit for a crude distillation unit to maximize cross-stream heat recovery.
2. Problem Statement
High utility costs due to sub-optimal heat exchange between hot CDU residue/side-draw streams and cold crude feed.
3. Objectives
1. Perform pinch analysis to determine minimum hot/cold utility targets. 2. Redesign preheat exchanger train topology in Aspen HYSYS.
4. Simulation Setup & Thermodynamic Selection
Pinch analysis target calculation followed by full rigorous shell-and-tube sizing and hydraulic validation in Aspen HYSYS.
5. Process Flow & Reduction Chemistry
Pinch analysis target calculation followed by full rigorous shell-and-tube sizing and hydraulic validation in Aspen HYSYS.
6. Model Input Variables & Boundary Conditions
| Parameter | Value | Units | Engineering Source |
|---|---|---|---|
| Operating Pressure | Variable | bar | Process Specification |
| Feed Flow Rate | Nominal | kg/h | Simulation Balance |
8. Results & Findings
9. Engineering Discussion & Trade-Off Analysis
The retrofit required adding only two shell-and-tube exchangers in series, demonstrating a payback period under 8 months.
10. Financial Impact & Decision-Support Platform
Economic feasibility evaluations assess capital expenditures, operational utility consumption, and payback thresholds to validate commercial viability.
11. Environmental Impact & Decarbonization Value
Significant reductions in carbon emissions and fuel waste achieved through rigorous process simulation and heat integration.
12. Model Limitations & Scope Boundaries
Space constraints in existing crude unit layout were not physically constraint-checked.
13. Engineering Conclusions
Pinch analysis combined with Aspen HYSYS simulation reveals high-ROI energy recovery opportunities in legacy refinery assets.
14. Future Development & Digital Twin Integration
Detailed 3D piping routing and pressure drop optimization.
16. Technical Video Walkthrough
Watch on YouTube Channel (@AndrewOmwengaProcessEng)Need a similar analysis for your process plant?
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