pie-fluid-systemslisted

# Fluid Systems Skill ## At a Glance Design and validate water-based fluid systems from household plumbing to high-density data center cooling loops. **Activation:** InfrastructureRequest type='cooling' or type='plumbing', any CDU sizing request, pipe sizing question, flow rate calculation, or pressure drop analysis. **Key capabilities:** - Pipe sizing via Darcy-Weisbach (all fluids) and Hazen-Williams (water only) - Flow rate calculation from heat load (Q = Q_heat / (rho x Cp x DT)) - Pressure drop analysis with fitting equivalent lengths - ASHRAE TC 9.9 water class selection (W1-W5) for data center cooling - CDU/DTC cooling selection and manifold topology - Pump curve analysis with NPSH verification and affinity laws - Safety boundary enforcement by safety class (residential through industrial) > ENGINEERING DISCLAIMER: All calculations must be verified by a licensed Professional Engineer before use in construction or installation. Local plumbing codes (IPC/UPC) and pressure vessel standards (ASME B31.9) impose requirements not captured here. User assumes all responsibility for verification. **Quick routing:** Pipe sizing method -- see Pipe Sizing. ASHRAE water class selection -- see Data Center Cooling. Pump selection and NPSH -- see Pump Selection. Full derivations -- @references/pipe-sizing.md. --- ## Pipe Sizing ### Darcy-Weisbach (All Fluids) The general pressure drop equation for incompressible flow in pipes: ``` DeltaP = f x (L/D) x (rho x v^2 / 2) ``` |