sepehr
3358b74342
Ship the Next.js cycle editor with CAD chrome, technical HX symbols, Fixed/Free boundary guidance, and secondary water/air pressure drop support in the solver stack. Co-authored-by: Cursor <cursoragent@cursor.com>
3.9 KiB
Condenser / CondenserCoil
Config types: "Condenser", "CondenserCoil"
Source: crates/components/src/heat_exchanger/condenser.rs
EN
Purpose & physical model
Refrigerant condenser rejecting heat to a secondary stream (water/glycol or air). Coupled duty is phase-change ε-NTU (isothermal refrigerant side at T_cond(P)):
ε = 1 − exp(−UA_eff / C_sec)
Q = ε · C_sec · (T_cond(P_in) − T_sec,in) # heat rejected by refrigerant
- Optional lumped refrigerant ΔP:
ΔP = k · ṁ · |ṁ| CondenserCoillocks secondary side to Air conventions- No plate correlation here (see BPHX for Longo/Shah geometry UA)
UA_eff can be reduced by flooded-level actuator; C_sec can be scaled by fan speed φ when fan head-pressure is active.
Dual secondary modes (Newton)
| Mode | Secondary source | n_secondary |
|---|---|---|
| System | Live edges ports 2/3 (secondary_inlet / secondary_outlet) |
1 or 2 |
| Rating | Scalars secondary_inlet_temp_* + capacity rate / ṁ·cp |
0 |
coupled_ready requires refrigerant indices and (live edges or rating scalars).
live_secondary_stream prefers edges; falls back to rating scalars (with fan φ scaling of C_sec when applicable).
Residuals & n_equations() (coupled)
| Row | Equation |
|---|---|
| r0 | P_out − (P_in − ΔP) (skippable) |
| r1 | ṁ · (h_in − h_out) − Q |
| r2 (emergent) | h_out − h(P, T_cond − SC) subcooling closure |
| r_mass | ṁ_out − ṁ_in if not same-branch |
| r_head (optional) | T_cond − T_target (fan or flooded head-pressure) |
| r_sec | live secondary mass/energy only if edges present |
n_equations = n_thermo + (mass?) + (head?) + n_secondary
n_thermo = 2 normally, 3 with emergent_pressure (+ subcooling residual)
Emergent pressure & actuators
emergent_pressure: true+subcooling_k→ condensing pressure is solved, not fixed by design T- Fan head-pressure: free φ scales
C_sec = φ · C_nominal; residual pinsT_cond - Flooded head-pressure: free level λ scales
UA_eff; mutually exclusive with fan
Ports
| Port | Index |
|---|---|
inlet / outlet |
0 / 1 refrigerant |
secondary_inlet / secondary_outlet |
2 / 3 secondary |
System wiring: Source → secondary_in → secondary_out → Sink.
Calibration
| Factor | Meaning | Default |
|---|---|---|
z_ua |
UA scale | 1.0 |
z_dp |
ΔP scale | 1.0 |
z_flow / z_power / z_etav |
via shared Calib API | 1.0 |
UI: Fixed on SDT target + free z_ua for inverse calibration.
JSON parameters (main)
| Key | Meaning | Default |
|---|---|---|
ua |
UA [W/K] | required |
emergent_pressure |
free P_cond | false |
subcooling_k |
outlet SC [K] | 5 |
secondary_fluid |
Water / Air / … | – |
secondary_inlet_temp_c / mass_flow / cp |
rating stream | – |
pressure_drop_coeff |
k for ΔP | – |
fan_head_pressure_target_c |
fan control | – |
flooded_head_pressure_target_c |
level control | – |
skip_pressure_eq |
drop r0 | false |
Zero flow
Live C_sec uses smooth_mass_magnitude(|ṁ|). Mass-flow index never remapped to a pressure column.
FR
But & modèle
Condenseur frigo → secondaire (eau/air). Duty ε-NTU :
Q = ε · C_sec · (T_cond(P) − T_sec,in)
Pas de corrélation plaques (voir BPHX). UA global ± actionneurs fan/niveau.
Modes secondaire
- Système : ports live Source/Sink
- Rating : scalaires T + ṁ·cp dans le Newton (pas seulement
rate())
Pression émergente
emergent_pressure + sous-refroidissement : P_cond est calculée.
Fan ou flooded head-pressure = +1 actionneur libre.
Calibration
z_ua = 1 par défaut. Imposer SDT + libérer Z_UA pour caler le condenseur.
Ports / JSON
Voir tableaux EN.