Plant Layout

Process plant layout via GDP: minimize plant size + pipe costs

Live demo: https://plant-layout.griffith-pse.com
Home: https://griffith-pse.com

Run locally

pip install -r requirements.txt
streamlit run app.py

Deployment

Auto-deploys to Fly.io on every push to main via .github/workflows/deploy.yml. The Dockerfile builds a Python 3.12 image and installs everything from requirements.txt; fly.toml configures auto-stop machines. Custom domain wired through Cloudflare DNS.

• Machine: shared-cpu-1x · 1 GB RAM · single region (ord) · min_machines_running=0 (auto-stops on idle).
• Cost ceiling: ~$3.89/mo if traffic kept the VM awake 24/7. Realistic on idle-heavy demo traffic: well under $1/mo per app. Bandwidth is effectively free under Fly's 100 GB/mo egress allowance.

Files

• app.py: Streamlit UI and computation
• requirements.txt: Python deps
• favicon.png: Griffith PSE blackletter G favicon
• Dockerfile, fly.toml, .dockerignore: Fly.io production image config
• .streamlit/config.toml: Streamlit defaults baked into the image
• .github/workflows/deploy.yml: auto-deploy pipeline

References

[1] L. G. Papageorgiou and G. E. Rotstein, "Continuous-Domain Mathematical Models for Optimal Process Plant Layout," Industrial & Engineering Chemistry Research, vol. 37, no. 9, pp. 3631–3639, 1998. ACS

[2] J. Westerlund and L. G. Papageorgiou, "Improved Performance in Process Plant Layout Problems Using Symmetry-Breaking Constraints," Proc. FOCAPD 2004 (Foundations of Computer-Aided Process Design), 2004. PDF

[3] N. W. Sawaya and I. E. Grossmann, "A Cutting Plane Method for Solving Linear Generalized Disjunctive Programming Problems," Computers & Chemical Engineering, vol. 29, no. 9, pp. 1891–1913, 2005. ScienceDirect

[4] M. L. Bynum, G. A. Hackebeil, W. E. Hart, C. D. Laird, B. L. Nicholson, J. D. Siirola, J.-P. Watson, and D. L. Woodruff, Pyomo: Optimization Modeling in Python, 3rd ed. Cham: Springer, 2021. Springer