Entropyk/docs/audits/montluel_machine_coverage.md

Montluel Machine Coverage Matrix (Phase A — initial)

Date: 2026-07-16 Status: Phase A initial assessment. No Carrier source documents were provided for this audit. Product-specific fields are therefore Unknown unless confirmed by repository code. Per mission §13 rules, missing evidence is never converted into an assumption.

Status legend:

• Supported = a convergent end-to-end system test exists AND required components/correlations are present.
• Partial = architecture exists but physical model, configuration, or validation is incomplete.
• Not supported = required primitive/topology is absent.
• Unknown = source information insufficient to classify.

Source codes: [code] = repository evidence; [carrier] = authorized Carrier source (none used here); ? = Unknown.

Evidence base: docs/audits/heat_exchanger_architecture_audit.md (same date).

---

A. Archetypes under investigation

ID	Archetype	Simulation status	Rationale (one line)
M1	Air-cooled screw chiller (single circuit)	Partial	Components exist; FloodedEvaporator+Drum smoke-tested but not converged; air coil UA from geometry (FinCoil/MCHX) is geometry-capable.
M2	Air-cooled screw chiller, dual-circuit / dual-module	Not supported	No shared-vessel primitive; cross-circuit edges rejected; example uses independent circuits only.
M3	Water-cooled screw chiller / heat pump	Partial	Condenser/Evaporator/FloodedEvaporator exist; flooded model UA-only, no geometry, no dT_sat/dP analytic.
M4	Flooded shell-and-tube evaporator/condenser machine	Partial	FloodedEvaporator/FloodedCondenser exist but UA-only, single-circuit, no shell-and-tube geometry; FloodedCondenser has an eqn-count defect.
M5	BPHX evaporator/economizer machine	Partial	BphxEvaporator/Economizer exist with geometry+correlation; superheat/subcooling not enforced as residuals; DP not residual-coupled.
M6	Scroll machine with BPHX or air-side coils	Partial	Compressors (Copeland/Danfoss) + BPHX/coils exist; no scroll-specific compressor model in core.
M7	Reversible air-to-water heat pump	Partial	ReversingValve component exists; not wired into CLI factory; reversing logic + 4-way cycle not system-tested.
M8	Centrifugal machine	Not supported	No centrifugal compressor component; no flooded centrifugal cycle test.
M9	Dry-cooler / free-cooling	Partial	FreeCoolingExchanger exists (CLI arm run.rs:4092); no converged free-cooling system test verified.
M10	Heat recovery / desuperheater	Not supported	No desuperheater component; no heat-recovery topology test.
M11	One-, two-, three-pass water exchangers	Not supported (physically)	ShellAndTube{passes} ε-NTU is decorative (passes unused); pass count does not affect HTC/DP/UA.
M12	One circuit running while another stopped (shared vessel)	Not supported	No shared-vessel primitive; staging example uses independent circuits.
M13	Multiple compressors per circuit	Unknown	Topology allows multiple components per circuit, but no system test with ≥2 compressors on one circuit was verified.
M14	Economizer / vapor injection	Partial	ScrewEconomizerCompressor + Economizer IHX exist; economized cycle has integration test (smoke, not converged-physics).
M15	Confirmed current-product refrigerants	Unknown	CoolProp supports R134a/R410A/R454B/etc. in tests; which refrigerants ship in confirmed Montluel products is Unknown (no Carrier data).

Note on "Partial": the codebase can draw the topology for several archetypes, but mission §13 requires separating "can draw the topology" from "can predict performance accurately." None reach Supported because no convergent end-to-end physics solve with geometry-based UA was verified in Phase A.

---

B. Detailed matrix (required columns)

Columns per mission §13. ? = Unknown (no evidence). Condensed where product-specific.

M1 — Air-cooled screw chiller (single circuit)

Field	Value / Evidence
Product family	? (no Carrier data)
Evidence/source	[code] components exist; no product doc
Cycle topology	single-circuit vapor-compression with economizer [code]
Compressor type	ScrewEconomizerCompressor [code]
Number of refrigerant circuits	1 [code]
Number of modules	?
Evaporator technology	FloodedEvaporator + Drum (per-circuit) [code]
Condenser technology	MchxCondenserCoil / FinCoilCondenser + fan bank [code]
Water/air path arrangement	air-cooled [code]
Pass count/options	N/A (air side)
Economizer	yes (IHX Economizer) [code]
Heat recovery	no
Refrigerant(s)	?
Existing Entropyk components	screw econ compressor, flooded evap, drum, mchx/fin coil, fan, EXV
Missing components	converged-physics solve; geometry-based flooded UA
Missing topology capability	none (single circuit)
Missing correlations/data	flooded boiling correlation not in registry; air coil UA inline (not registry)
Zero-flow/staging support	single-circuit only
Validation dataset available?	No
Simulation status	Partial
Blocking issues	B2 (CoolProp build), B5 (red test)
Required implementation/test	converged air-cooled chiller system test

M2 — Air-cooled screw chiller, dual-circuit / dual-module

Field	Value / Evidence
Product family	?
Evidence/source	[code] no shared-vessel primitive; multi_circuit.rs uses mocks
Cycle topology	two refrigerant circuits [code: rejected cross-circuit edges]
Compressor type	screw [code]
Number of refrigerant circuits	2 (target)
Number of modules	1 (shared vessel) or 2 (dual module) — both Not supported
Evaporator technology	needs shared-vessel flooded OR two modules
Condenser technology	air coil bank [code]
Water/air path arrangement	one common air stream (interlaced/face-split) — not modeled
Pass count/options	?
Economizer	?
Heat recovery	?
Refrigerant(s)	?
Existing Entropyk components	per-circuit flooded evap + drum only
Missing components	MultiCircuitFloodedEvaporator; shared-secondary wrapper; air-side multi-circuit topology
Missing topology capability	cross-circuit shared vessel (Phase D); air-side circuit interlace (Phase E)
Missing correlations/data	circuit-specific UA calibration
Zero-flow/staging support	Not supported (no primitive)
Validation dataset available?	No
Simulation status	Not supported
Blocking issues	Phase D + E prerequisites
Required implementation/test	shared-vessel dual-circuit converged test; one-circuit-off test

M3 — Water-cooled screw chiller / heat pump

Field	Value / Evidence
Product family	?
Evidence/source	[code] condenser/evaporator/flooded exist
Cycle topology	vapor-compression, water-coupled [code]
Compressor type	screw [code]
Number of refrigerant circuits	1 [code]
Number of modules	?
Evaporator technology	DX Evaporator or FloodedEvaporator (UA-only) [code]
Condenser technology	Condenser (UA-only) / FloodedCondenser (defective eqn count) [code]
Water/air path arrangement	water-cooled, secondary as boundary or 4-port [code]
Pass count/options	decorative (passes unused)
Economizer	optional [code]
Heat recovery	no
Refrigerant(s)	?
Existing Entropyk components	condenser, evaporator, flooded evap/cond, pump, brine boundary
Missing components	shell-and-tube geometry; water-side DP by pass; pass-aware effectiveness
Missing topology capability	fully-coupled live secondary ports (boundary mode is default)
Missing correlations/data	Gnielinski water-side; bundle boiling; tube-bundle condensation
Zero-flow/staging support	boundary regularization only
Validation dataset available?	No
Simulation status	Partial
Blocking issues	Phase B/C geometry + correlations
Required implementation/test	geometry-rated water chiller converged test

M4 — Flooded shell-and-tube evaporator/condenser machine

Field	Value / Evidence
Product family	? (61XWHVZE referenced in mission — no data provided)
Evidence/source	[code] flooded evap/cond exist; mission §5.1 [carrier: not provided]
Cycle topology	flooded evap + flooded condenser [code]
Compressor type	?
Number of refrigerant circuits	1 [code]; 2 shared-vessel Not supported
Number of modules	?
Evaporator technology	FloodedEvaporator (UA-only, single circuit, no geometry) [code]
Condenser technology	FloodedCondenser (UA-only, eqn-count defect) [code]
Water/air path arrangement	one common water circuit [carrier: mission §5.1, geometry not provided]
Pass count/options	standard 2-pass + 1/3 options [carrier: mission §5.1]; passes unused in code
Economizer	economizer BPHX [carrier: mission §5.1]
Heat recovery	?
Refrigerant(s)	?
Existing Entropyk components	flooded evap/cond (UA-only)
Missing components	ShellAndTubeGeometry; flooded boiling correlation; tube-bundle condensation; MultiCircuitFloodedEvaporator
Missing topology capability	shared-vessel two refrigerant circuits + intermediate tube sheet (Phase D)
Missing correlations/data	Cooper/Gorenflo pool boiling baseline; enhanced-tube correction; water-box losses; all product geometry Unknown
Zero-flow/staging support	not implemented
Validation dataset available?	No
Simulation status	Partial (single circuit) / Not supported (shared-vessel dual circuit)
Blocking issues	Carrier geometry data required for fixtures; Phases B/C/D
Required implementation/test	1- and 2-circuit flooded chiller converged tests with geometry UA

M5 — BPHX evaporator/economizer machine

Field	Value / Evidence
Product family	?
Evidence/source	[code] BPHX family + registry + geometry
Cycle topology	DX BPHX evap + BPHX economizer [code]
Compressor type	screw/scroll [code]
Number of refrigerant circuits	1 [code]; dual-circuit BPHX Partial (Phase E)
Evaporator technology	BphxEvaporator (geometry+correlation) [code]
Condenser technology	BphxCondenser [code]
Water/air path arrangement	4-port [code]
Pass count/options	N/A (plate)
Economizer	Economizer IHX [code]
Heat recovery	no
Refrigerant(s)	?
Existing Entropyk components	full BPHX family + correlation registry
Missing components	superheat/subcooling as residual equations; DP residual coupling; dual-circuit BPHX
Missing topology capability	circuit-specific UA calibration (Phase E)
Missing correlations/data	SWEP BPHX data present (B5THx20, B8THx30); product-specific calibration Unknown
Zero-flow/staging support	correlation guards only
Validation dataset available?	No
Simulation status	Partial
Blocking issues	residual-coupled DP; Phase E dual-circuit
Required implementation/test	BPHX chiller converged test with residual DP

M6 — Scroll machine (BPHX / air coils)

Field	Value / Evidence
Product family	?
Evidence/source	[code] vendor scroll data (Copeland/Danfoss)
Cycle topology	vapor-compression [code]
Compressor type	scroll (vendor data) [code]; no core scroll component model
Number of refrigerant circuits	1 [code]
Evaporator/condenser technology	BPHX or air coil [code]
Pass count/options	N/A
Economizer	?
Heat recovery	no
Refrigerant(s)	?
Existing components	vendor compressor data, BPHX, coils
Missing components	scroll compressor component wired to vendor backend
Simulation status	Partial

M7 — Reversible air-to-water heat pump

Field	Value / Evidence
Evidence/source	[code] ReversingValve exists; not in CLI factory
Cycle topology	reversible [code]
Compressor type	?
Circuits	1 [code]
Evaporator/condenser	role-swap via reversing valve [code]
Reversing capability	component exists, not system-tested
Simulation status	Partial
Blocking issues	reversing valve CLI wiring; reversing system test

M8 — Centrifugal machine

Field	Value / Evidence
Evidence/source	[code] no centrifugal compressor component
Simulation status	Not supported
Blocking issues	centrifugal compressor model entirely absent

M9 — Dry-cooler / free-cooling

Field	Value / Evidence
Evidence/source	[code] FreeCoolingExchanger (CLI arm run.rs:4092)
Simulation status	Partial
Blocking issues	no converged free-cooling system test verified

M10 — Heat recovery / desuperheater

Field	Value / Evidence
Evidence/source	[code] no desuperheater component; no HR topology test
Simulation status	Not supported

M11 — Water exchanger pass count (1/2/3 pass)

Field	Value / Evidence
Evidence/source	[code] eps_ntu.rs:168-174 passes unused; lmtd.rs:53 F=0.9 hard-coded
Simulation status	Not supported (physically) — pass count does not affect UA/HTC/DP/effectiveness
Blocking issues	Phase B/C: real P-NTU multipass effectiveness + per-pass velocity/DP

M12 — One circuit ON, other OFF (shared vessel)

Field	Value / Evidence
Evidence/source	[code] no shared-vessel primitive
Simulation status	Not supported
Blocking issues	Phase D (zero-flow-safe multi-circuit)

M13 — Multiple compressors per circuit

Field	Value / Evidence
Evidence/source	topology allows multiple nodes per circuit [code]; no verified test
Simulation status	Unknown

M14 — Economizer / vapor injection

Field	Value / Evidence
Evidence/source	[code] ScrewEconomizerCompressor + Economizer IHX; integration test is smoke-only
Simulation status	Partial

M15 — Confirmed current-product refrigerants

Field	Value / Evidence
Evidence/source	CoolProp tests cover R134a/R410A/R454B [code]; which refrigerants ship in Montluel products
Simulation status	Unknown (no Carrier data)

---

C. Coverage summary

Status	Count	Archetypes
Supported	0	—
Partial	9	M1, M3, M4(single), M5, M6, M7, M9, M14 (+M4 single)
Not supported	5	M2, M8, M10, M11(physical), M12
Unknown	2	M13, M15

Zero archetypes are Supported. The blockers are, in priority order:

1. Shared-vessel multi-circuit primitive (Phase D) → unblocks M2, M4-dual, M12.
2. Shell-and-tube geometry + correlations (Phases B/C) → unblocks M3, M4, M11.
3. Residual-coupled DP + control semantics (Phase C) → unblocks M5.
4. Carrier product geometry/validation data → required to move any archetype to Supported.

D. Data required from Carrier (to advance beyond Partial/Unknown)

The following are needed and must not be guessed (mission §1.4, §14):

• 61XWHVZE: shell ID, tube OD/ID, tube count per pass, active length per refrigerant circuit, tube enhancement type, water-box geometry, fouling factors, refrigerant(s), intermediate tube-sheet partition details, water-path layout through partitions.
• 30XF-Z: module/pass arrangement, one- vs two-pass evaporator options, pump/DP implications.
• BPHX dual-circuit: independent circuit UA calibration factors.
• Validation datasets (rated capacity/COP at AHRI/equivalent points) for each fixture.

Until provided, all product-specific fixture rows remain Unknown.