OTEC Cold-Water Pipe Optimizer (2D Cross-Section)

Every Ocean Thermal Energy Conversion plant lives or dies on one number: the diameter of its Cold-Water Pipe. This 2D cross-section renders the pipe against the real ocean depth profile — from the warm surface layer down past the thermocline to the deep cold water — with pannable, zoomable scrolling so you can inspect any section of a pipe running 500–1500 m down. Four controls — pipe diameter, flow velocity, pipe depth and the surface-to-deep temperature gradient — drive the same real thermodynamic and fluid-mechanics model as the 3D version: gross thermal power from a Carnot-limited Rankine-cycle estimate, pumping power from the Darcy–Weisbach friction equation with a Blasius turbulent friction factor. A second panel plots net power against diameter live, so you can watch the whole optimization curve shift as you move the other sliders, then use "Snap to near-optimal D" to jump straight to the peak.