Equilibrium stage
= Equilibrium stage
An <equilibrium stage> models a contact whose outgoing <liquid> and <vapor> satisfy <vapor-liquid equilibrium> at the stage's <temperature> and <pressure>. It is a composition model, not a claim that each piece of packing reaches <thermodynamic equilibrium>.<Hyper-TVT by ETH Zurich/Distillation efficiency>[Hyper-TVT by ETH Zurich; §5.6 Efficiency, opening equilibrium-plate assumption]{ref}