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Capture uncommitted solver robustness work (regularization, domain errors, linear solver lifecycle, tube DP/MSH), web workbench updates, and synced BMAD skills across IDE agent folders before starting BPHX pressure-drop. Co-authored-by: Cursor <cursoragent@cursor.com>
63 lines
1.6 KiB
Markdown
63 lines
1.6 KiB
Markdown
# Drum (separator / recirculation drum)
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Config type: `"Drum"`
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Source: `crates/components/src/drum.rs`
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---
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## EN
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### Purpose & model
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Liquid/vapor **separator** used in flooded recirculation architectures. Splits a two-phase feed into liquid and vapor outlets; may accept an evaporator return.
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Thermodynamics: equilibrium separation at drum pressure (quality split toward x≈0 liquid / x≈1 vapor legs), mass and energy balances across ports.
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### Residuals & `n_equations()`
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Multi-port balance residuals (mass + energy + pressure consistency). Exact count depends on active ports and edge wiring; treat as a multi-equation node — see unit tests and `n_equations()` in source.
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### Ports (4-port naming)
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| Port | Role |
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|------|------|
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| `feed_inlet` | two-phase feed |
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| `evaporator_return` | return from flooded evaporator |
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| `liquid_outlet` | liquid to pump / recirculation |
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| `vapor_outlet` | vapor to compressor suction |
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### Calibration
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No primary Z-factor set; geometry/level control may be added in specialized builds.
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### JSON (main)
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| Key | Meaning | Default |
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|-----|---------|---------|
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| `fluid` / refrigerant | working fluid | primary |
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| level / volume options | if exposed | – |
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### System note
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A **flooded plate** topology is often Drum + recirculation + DX exchanger — not a mode of BPHX alone. Shell-and-tube flooded use `FloodedEvaporator`.
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---
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## FR
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### But & modèle
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**Ballon séparateur** liquide/vapeur pour architectures noyées / recirculation.
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### Ports
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Alimentation, retour évap, sortie liquide, sortie vapeur.
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### DoF
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Nœud multi-équations ; équilibrer avec le reste du circuit.
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### JSON
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Voir EN.
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