PythonModels/components/amesim_pneumatic_line.py

@@ -8,7 +8,7 @@ from PythonModels.components.amesim_pneumatic import (
     AmesimPneumaticGas,
     diameter_mm_to_area_m2,
 )
-from PythonModels.core.base import DynamicComponent
+from PythonModels.core.base import AlgebraicComponent, DynamicComponent
 from PythonModels.core.medium import ThermodynamicProperties
 from PythonModels.core.ports import PortState
 from PythonModels.core.state import VolumeState
@@ -23,7 +23,89 @@ class AmesimPnl0001Diagnostics:
     pressure_drop_pa: float
 
 
-class AmesimPnl0001Pipe(DynamicComponent):
+class _DarcyPipeResistanceMixin:
+    diameter: float
+    length: float
+    relative_roughness: float
+    area: float
+
+    def _mass_flow_for_pressure_drop(
+        self,
+        pressure_drop_pa: float,
+        *,
+        density: float,
+        temperature: float,
+    ) -> float:
+        if pressure_drop_pa <= 0.0:
+            return 0.0
+        upper = 1.0e-9
+        while self._darcy_pressure_drop(
+            upper,
+            density=density,
+            temperature=temperature,
+        ) < pressure_drop_pa:
+            upper *= 10.0
+            if upper > 1.0e3:
+                raise ValueError("unable to bracket pneumatic pipe resistance flow")
+        lower = 0.0
+        for _ in range(80):
+            middle = 0.5 * (lower + upper)
+            if self._darcy_pressure_drop(
+                middle,
+                density=density,
+                temperature=temperature,
+            ) < pressure_drop_pa:
+                lower = middle
+            else:
+                upper = middle
+        return 0.5 * (lower + upper)
+
+    def _darcy_pressure_drop(
+        self,
+        mass_flow_kg_s: float,
+        *,
+        density: float,
+        temperature: float,
+    ) -> float:
+        if mass_flow_kg_s == 0.0:
+            return 0.0
+        reynolds = self._reynolds_number(mass_flow_kg_s, temperature)
+        friction_factor = self._friction_factor(reynolds)
+        velocity = mass_flow_kg_s / (density * self.area)
+        magnitude = (
+            friction_factor
+            * (self.length / self.diameter)
+            * density
+            * velocity
+            * velocity
+            / 2.0
+        )
+        return magnitude if mass_flow_kg_s > 0.0 else -magnitude
+
+    def _reynolds_number(self, mass_flow_kg_s: float, temperature: float) -> float:
+        viscosity = helium_dynamic_viscosity(temperature)
+        return 4.0 * abs(mass_flow_kg_s) / (pi * self.diameter * viscosity)
+
+    def _friction_factor(self, reynolds_number: float) -> float:
+        if reynolds_number <= 0.0:
+            return 64_000_000.0
+        laminar = 64.0 / reynolds_number
+        if reynolds_number <= 2_300.0:
+            return laminar
+        turbulent = 1.0 / (
+            -1.8
+            * log10(
+                (self.relative_roughness / 3.7) ** 1.11
+                + 6.9 / reynolds_number
+            )
+        ) ** 2
+        if reynolds_number >= 4_000.0:
+            return turbulent
+        fraction = (reynolds_number - 2_300.0) / 1_700.0
+        return laminar + fraction * (turbulent - laminar)
+
+
+class AmesimPnl0001Pipe(_DarcyPipeResistanceMixin, DynamicComponent):
     """Physical first-pass implementation of AMESim ``PNL0001`` (C-R).
 
     Port 2 owns the lumped gas storage. Port 1 is connected through a Darcy
@@ -193,80 +275,289 @@ class AmesimPnl0001Pipe(DynamicComponent):
             U=port_1_m_flow * inlet_h_1 + port_2_m_flow * inlet_h_2 + heat_flow,
         )
 
-    def _mass_flow_for_pressure_drop(
-        self,
-        pressure_drop_pa: float,
-        *,
-        density: float,
-        temperature: float,
-    ) -> float:
-        if pressure_drop_pa <= 0.0:
-            return 0.0
-        upper = 1.0e-9
-        while self._darcy_pressure_drop(
-            upper,
-            density=density,
-            temperature=temperature,
-        ) < pressure_drop_pa:
-            upper *= 10.0
-            if upper > 1.0e3:
-                raise ValueError("unable to bracket PNL0001 resistance flow")
-        lower = 0.0
-        for _ in range(80):
-            middle = 0.5 * (lower + upper)
-            if self._darcy_pressure_drop(
-                middle,
-                density=density,
-                temperature=temperature,
-            ) < pressure_drop_pa:
-                lower = middle
-            else:
-                upper = middle
-        return 0.5 * (lower + upper)
 
-    def _darcy_pressure_drop(
+class AmesimPnl0003Pipe(_DarcyPipeResistanceMixin, DynamicComponent):
+    """First-pass AMESim ``PNL0003`` (C-R-C) pipe.
+
+    The two pipe-end compliances are represented as equal half-volume gas
+    stores connected by the same auditable Darcy resistance used for PNL0001.
+    Center flow is positive from port 1 storage to port 2 storage.
+    """
+
+    state_size = 4
+
+    def __init__(
         self,
-        mass_flow_kg_s: float,
+        name: str,
         *,
-        density: float,
-        temperature: float,
-    ) -> float:
-        if mass_flow_kg_s == 0.0:
+        diameter_mm: float,
+        length_m: float,
+        relative_roughness: float,
+        polytropic_constant: float = 1.35,
+        heat_transfer_coefficient: float = 0.0,
+        external_temperature_k: float = 293.15,
+        gas: AmesimPneumaticGas = HELIUM_PNEUMATIC_GAS,
+        p1_0: float = 101_325.0,
+        T1_0: float = 293.15,
+        p2_0: float = 101_325.0,
+        T2_0: float = 293.15,
+    ) -> None:
+        if diameter_mm <= 0.0:
+            raise ValueError("diameter_mm must be positive")
+        if length_m <= 0.0:
+            raise ValueError("length_m must be positive")
+        if relative_roughness < 0.0:
+            raise ValueError("relative_roughness must be non-negative")
+        if polytropic_constant <= 0.0:
+            raise ValueError("polytropic_constant must be positive")
+        if heat_transfer_coefficient < 0.0:
+            raise ValueError("heat_transfer_coefficient must be non-negative")
+        if external_temperature_k <= 0.0:
+            raise ValueError("external_temperature_k must be positive")
+
+        super().__init__(name=name)
+        self.diameter = diameter_mm * 1.0e-3
+        self.length = length_m
+        self.relative_roughness = relative_roughness
+        self.polytropic_constant = polytropic_constant
+        self.heat_transfer_coefficient = heat_transfer_coefficient
+        self.external_temperature = external_temperature_k
+        self.gas = gas
+        self.area = diameter_mm_to_area_m2(diameter_mm)
+        self.volume = self.area * self.length
+        self.compliance_volume = self.volume / 2.0
+        self.heat_transfer_area = pi * self.diameter * self.length
+
+        self.state_1 = self._initial_state(p1_0, T1_0)
+        self.state_2 = self._initial_state(p2_0, T2_0)
+        self.port_1 = PortState()
+        self.port_2 = PortState()
+
+    def _initial_state(self, pressure: float, temperature: float) -> VolumeState:
+        rho = self.gas.density(pressure, temperature)
+        mass = rho * self.compliance_volume
+        return VolumeState(
+            m=mass,
+            U=mass * self.gas.specific_internal_energy(temperature),
+        )
+
+    def get_state_vector(self) -> list[float]:
+        return [*self.state_1.as_vector(), *self.state_2.as_vector()]
+
+    def set_state_vector(self, values: list[float]) -> None:
+        if len(values) != 4:
+            raise ValueError("PNL0003 state vector requires four values")
+        self.state_1 = VolumeState.from_vector(values[:2])
+        self.state_2 = VolumeState.from_vector(values[2:])
+
+    def properties_1(self) -> ThermodynamicProperties:
+        properties = self._properties(self.state_1)
+        self.port_1.p = properties.p
+        self.port_1.h_outflow = properties.h
+        return properties
+
+    def properties_2(self) -> ThermodynamicProperties:
+        properties = self._properties(self.state_2)
+        self.port_2.p = properties.p
+        self.port_2.h_outflow = properties.h
+        return properties
+
+    def _properties(self, state: VolumeState) -> ThermodynamicProperties:
+        if state.m <= 0.0:
+            raise ValueError("pipe mass must stay positive")
+        temperature = self.gas.temperature_from_internal_energy(state.U / state.m)
+        density = state.m / self.compliance_volume
+        pressure = self.gas.pressure(density, temperature)
+        return ThermodynamicProperties(
+            p=pressure,
+            T=temperature,
+            rho=density,
+            u=state.U / state.m,
+            h=self.gas.specific_enthalpy(temperature),
+        )
+
+    def gas_mass_g(self) -> float:
+        return (self.state_1.m + self.state_2.m) * 1.0e3
+
+    def resistance_mass_flow(self) -> float:
+        """Return center mass flow from port 1 storage to port 2 storage."""
+        port_1 = self.properties_1()
+        port_2 = self.properties_2()
+        pressure_difference = port_1.p - port_2.p
+        if pressure_difference == 0.0:
             return 0.0
+        upstream = port_1 if pressure_difference > 0.0 else port_2
+        magnitude = self._mass_flow_for_pressure_drop(
+            abs(pressure_difference),
+            density=upstream.rho,
+            temperature=upstream.T,
+        )
+        return magnitude if pressure_difference > 0.0 else -magnitude
+
+    def diagnostics(
+        self,
+        *,
+        mass_flow_kg_s: float,
+        temperature_k: float | None = None,
+    ) -> AmesimPnl0001Diagnostics:
+        port_1 = self.properties_1()
+        port_2 = self.properties_2()
+        temperature = temperature_k or (port_1.T if mass_flow_kg_s >= 0.0 else port_2.T)
+        density = port_1.rho if mass_flow_kg_s >= 0.0 else port_2.rho
         reynolds = self._reynolds_number(mass_flow_kg_s, temperature)
         friction_factor = self._friction_factor(reynolds)
         velocity = mass_flow_kg_s / (density * self.area)
-        magnitude = (
-            friction_factor
-            * (self.length / self.diameter)
-            * density
-            * velocity
-            * velocity
+        pressure_drop = self._darcy_pressure_drop(
+            mass_flow_kg_s,
+            density=density,
+            temperature=temperature,
+        )
+        return AmesimPnl0001Diagnostics(
+            mass_flow_kg_s=mass_flow_kg_s,
+            reynolds_number=reynolds,
+            gas_velocity_m_s=velocity,
+            friction_factor=friction_factor,
+            pressure_drop_pa=pressure_drop,
+        )
+
+    def derivatives_from_connections(
+        self,
+        *,
+        port_1_m_flow: float,
+        connected_h_1: float,
+        port_2_m_flow: float,
+        connected_h_2: float,
+    ) -> tuple[VolumeState, VolumeState]:
+        port_1 = self.properties_1()
+        port_2 = self.properties_2()
+        center_flow = self.resistance_mass_flow()
+        heat_flow_each = (
+            self.heat_transfer_coefficient
+            * self.heat_transfer_area
+            * (self.external_temperature - 0.5 * (port_1.T + port_2.T))
             / 2.0
         )
-        return magnitude if mass_flow_kg_s > 0.0 else -magnitude
+        port_1_external_h = self.connection_inlet_enthalpy(
+            port_m_flow=port_1_m_flow,
+            connected_h=connected_h_1,
+            internal_h=port_1.h,
+        )
+        port_2_external_h = self.connection_inlet_enthalpy(
+            port_m_flow=port_2_m_flow,
+            connected_h=connected_h_2,
+            internal_h=port_2.h,
+        )
+        port_1_center_h = self.connection_inlet_enthalpy(
+            port_m_flow=-center_flow,
+            connected_h=port_2.h,
+            internal_h=port_1.h,
+        )
+        port_2_center_h = self.connection_inlet_enthalpy(
+            port_m_flow=center_flow,
+            connected_h=port_1.h,
+            internal_h=port_2.h,
+        )
+        return (
+            VolumeState(
+                m=port_1_m_flow - center_flow,
+                U=(
+                    port_1_m_flow * port_1_external_h
+                    - center_flow * port_1_center_h
+                    + heat_flow_each
+                ),
+            ),
+            VolumeState(
+                m=port_2_m_flow + center_flow,
+                U=(
+                    port_2_m_flow * port_2_external_h
+                    + center_flow * port_2_center_h
+                    + heat_flow_each
+                ),
+            ),
+        )
 
-    def _reynolds_number(self, mass_flow_kg_s: float, temperature: float) -> float:
-        viscosity = helium_dynamic_viscosity(temperature)
-        return 4.0 * abs(mass_flow_kg_s) / (pi * self.diameter * viscosity)
 
-    def _friction_factor(self, reynolds_number: float) -> float:
-        if reynolds_number <= 0.0:
-            return 64_000_000.0
-        laminar = 64.0 / reynolds_number
-        if reynolds_number <= 2_300.0:
-            return laminar
-        turbulent = 1.0 / (
-            -1.8
-            * log10(
-                (self.relative_roughness / 3.7) ** 1.11
-                + 6.9 / reynolds_number
+class AmesimPnl00rPipe(_DarcyPipeResistanceMixin, AlgebraicComponent):
+    """First-pass AMESim ``PNL00R`` (R) pipe resistance."""
+
+    def __init__(
+        self,
+        name: str,
+        *,
+        diameter_mm: float,
+        length_m: float,
+        relative_roughness: float,
+        gas: AmesimPneumaticGas = HELIUM_PNEUMATIC_GAS,
+    ) -> None:
+        if diameter_mm <= 0.0:
+            raise ValueError("diameter_mm must be positive")
+        if length_m <= 0.0:
+            raise ValueError("length_m must be positive")
+        if relative_roughness < 0.0:
+            raise ValueError("relative_roughness must be non-negative")
+
+        super().__init__(name=name)
+        self.diameter = diameter_mm * 1.0e-3
+        self.length = length_m
+        self.relative_roughness = relative_roughness
+        self.gas = gas
+        self.area = diameter_mm_to_area_m2(diameter_mm)
+        self.port_1 = PortState()
+        self.port_2 = PortState()
+
+    def mass_flow(
+        self,
+        *,
+        port_1_pressure_pa: float,
+        port_1_temperature_k: float,
+        port_2_pressure_pa: float,
+        port_2_temperature_k: float,
+    ) -> float:
+        """Return mass flow from port 1 to port 2 in kg/s."""
+        if port_1_pressure_pa <= 0.0 or port_2_pressure_pa <= 0.0:
+            raise ValueError("port pressures must be positive")
+        if port_1_temperature_k <= 0.0 or port_2_temperature_k <= 0.0:
+            raise ValueError("port temperatures must be positive")
+        pressure_difference = port_1_pressure_pa - port_2_pressure_pa
+        if pressure_difference == 0.0:
+            return 0.0
+        upstream_pressure = max(port_1_pressure_pa, port_2_pressure_pa)
+        upstream_temperature = (
+            port_1_temperature_k
+            if pressure_difference > 0.0
+            else port_2_temperature_k
+        )
+        density = self.gas.density(upstream_pressure, upstream_temperature)
+        magnitude = self._mass_flow_for_pressure_drop(
+            abs(pressure_difference),
+            density=density,
+            temperature=upstream_temperature,
+        )
+        return magnitude if pressure_difference > 0.0 else -magnitude
+
+    def diagnostics(
+        self,
+        *,
+        mass_flow_kg_s: float,
+        pressure_pa: float,
+        temperature_k: float,
+    ) -> AmesimPnl0001Diagnostics:
+        density = self.gas.density(pressure_pa, temperature_k)
+        reynolds = self._reynolds_number(mass_flow_kg_s, temperature_k)
+        friction_factor = self._friction_factor(reynolds)
+        velocity = mass_flow_kg_s / (density * self.area)
+        pressure_drop = self._darcy_pressure_drop(
+            mass_flow_kg_s,
+            density=density,
+            temperature=temperature_k,
+        )
+        return AmesimPnl0001Diagnostics(
+            mass_flow_kg_s=mass_flow_kg_s,
+            reynolds_number=reynolds,
+            gas_velocity_m_s=velocity,
+            friction_factor=friction_factor,
+            pressure_drop_pa=pressure_drop,
         )
-        ) ** 2
-        if reynolds_number >= 4_000.0:
-            return turbulent
-        fraction = (reynolds_number - 2_300.0) / 1_700.0
-        return laminar + fraction * (turbulent - laminar)
 
 
 def helium_dynamic_viscosity(temperature_k: float) -> float:

PythonModels/systems/test_mql.py

@@ -3860,6 +3860,8 @@ class TestMqlSystem:
         self.archive_path = archive_path or Path(__file__).resolve().parents[2] / AMESIM_ARCHIVE_RELATIVE_PATH
         self.network = SimulationNetwork(name=MODEL_NAME)
         self.pnl0001_assembly = self._build_pnl0001_assembly()
+        self.pnl0003_assembly = self._build_pnl0003_assembly()
+        self.pnl00r_assembly = self._build_pnl00r_assembly()
         self.node3_assembly = self._build_node3_assembly()
         self.pneumatic_assembly = self._build_pneumatic_assembly()
         pneumatic_components = self._pneumatic_components_by_alias()
@@ -3890,6 +3892,20 @@ class TestMqlSystem:
 
         return build_test_mql_pnl0001_assembly(self.archive_path)
 
+    def _build_pnl0003_assembly(self):
+        from PythonModels.systems.test_mql_pneumatic_lines import (
+            build_test_mql_pnl0003_assembly,
+        )
+
+        return build_test_mql_pnl0003_assembly(self.archive_path)
+
+    def _build_pnl00r_assembly(self):
+        from PythonModels.systems.test_mql_pneumatic_lines import (
+            build_test_mql_pnl00r_assembly,
+        )
+
+        return build_test_mql_pnl00r_assembly(self.archive_path)
+
     @staticmethod
     def _build_node3_assembly():
         from PythonModels.systems.test_mql_nodes import build_test_mql_node3_assembly
@@ -3912,6 +3928,14 @@ class TestMqlSystem:
     def typed_pnl0001_line_count(self) -> int:
         return len(self.pnl0001_assembly.lines)
 
+    @property
+    def typed_pnl0003_line_count(self) -> int:
+        return len(self.pnl0003_assembly.lines)
+
+    @property
+    def typed_pnl00r_line_count(self) -> int:
+        return len(self.pnl00r_assembly.lines)
+
     @property
     def typed_node3_count(self) -> int:
         return len(self.node3_assembly)

PythonModels/systems/test_mql_line_parameters.py

@@ -35,6 +35,48 @@ class TestMqlPnl0001Spec:
         return self.initial_gauge_pressure_pa + AMESIM_REFERENCE_PRESSURE_PA
 
 
+@dataclass(frozen=True)
+class TestMqlPnl0003Spec:
+    alias: str
+    source_component: str
+    source_port: str
+    target_component: str
+    target_port: str
+    diameter_mm: float
+    length_m: float
+    relative_roughness: float
+    polytropic_constant: float
+    heat_transfer_coefficient: float
+    external_temperature_k: float
+    gas_type_index: int
+    mode: int
+    initial_temperature_1_k: float
+    initial_gauge_pressure_1_pa: float
+    initial_temperature_2_k: float
+    initial_gauge_pressure_2_pa: float
+
+    @property
+    def initial_absolute_pressure_1_pa(self) -> float:
+        return self.initial_gauge_pressure_1_pa + AMESIM_REFERENCE_PRESSURE_PA
+
+    @property
+    def initial_absolute_pressure_2_pa(self) -> float:
+        return self.initial_gauge_pressure_2_pa + AMESIM_REFERENCE_PRESSURE_PA
+
+
+@dataclass(frozen=True)
+class TestMqlPnl00rSpec:
+    alias: str
+    source_component: str
+    source_port: str
+    target_component: str
+    target_port: str
+    diameter_mm: float
+    length_m: float
+    relative_roughness: float
+    gas_type_index: int
+
+
 def load_test_mql_pnl0001_specs(
     archive_path: str | Path,
     *,
@@ -111,6 +153,145 @@ def load_test_mql_pnl0001_specs(
     return tuple(specs)
 
 
+def load_test_mql_pnl0003_specs(
+    archive_path: str | Path,
+    *,
+    cir_member: str = "test_mql_.cir",
+) -> tuple[TestMqlPnl0003Spec, ...]:
+    """Load resolved PNL0003 geometry and both compliance initial states."""
+    with tarfile.open(archive_path) as archive:
+        cir_file = archive.extractfile(cir_member)
+        if cir_file is None:
+            raise ValueError(f"Missing AMESim circuit member: {cir_member}")
+        cir_text = cir_file.read().decode("latin1")
+
+    numeric_globals = {
+        name: value
+        for name, expression in GLOBAL_PARAMETERS.items()
+        if (value := resolve_numeric_expression(expression, {})) is not None
+    }
+    connections = {
+        str(connection["alias"]): connection
+        for connection in CONNECTION_SPECS
+        if connection["submodel"] == "PNL0003"
+    }
+    specs = []
+    for block in re.findall(r"<LINE>.*?</LINE>", cir_text, flags=re.DOTALL):
+        if _optional_text(block, "SUB_NAME") != "PNL0003":
+            continue
+        alias = _required_text(block, "ALIAS")
+        connection = connections.get(alias)
+        if connection is None:
+            raise ValueError(f"PNL0003 line {alias!r} is absent from CONNECTION_SPECS")
+        real_parameters = _parameter_expressions(block, "RPARAM")
+        integer_parameters = _parameter_expressions(block, "IPARAM")
+        state_values = _evar_values(block)
+        specs.append(
+            TestMqlPnl0003Spec(
+                alias=alias,
+                source_component=str(connection["source_component"]),
+                source_port=str(connection["source_port"]),
+                target_component=str(connection["target_component"]),
+                target_port=str(connection["target_port"]),
+                diameter_mm=_required_numeric(
+                    alias, "diam", real_parameters, numeric_globals
+                ),
+                length_m=_required_numeric(alias, "le", real_parameters, numeric_globals),
+                relative_roughness=_required_numeric(
+                    alias, "rr", real_parameters, numeric_globals
+                ),
+                polytropic_constant=_required_numeric(
+                    alias, "k", real_parameters, numeric_globals
+                ),
+                heat_transfer_coefficient=_required_numeric(
+                    alias, "kth", real_parameters, numeric_globals
+                ),
+                external_temperature_k=_required_numeric(
+                    alias, "extemp", real_parameters, numeric_globals
+                ),
+                gas_type_index=int(
+                    _required_numeric(alias, "gi", integer_parameters, numeric_globals)
+                ),
+                mode=int(
+                    _required_numeric(alias, "mode", integer_parameters, numeric_globals)
+                ),
+                initial_temperature_1_k=_required_numeric(
+                    alias, "t1", state_values, numeric_globals
+                ),
+                initial_gauge_pressure_1_pa=_required_numeric(
+                    alias, "p1", state_values, numeric_globals
+                ),
+                initial_temperature_2_k=_required_numeric(
+                    alias, "t2", state_values, numeric_globals
+                ),
+                initial_gauge_pressure_2_pa=_required_numeric(
+                    alias, "p2", state_values, numeric_globals
+                ),
+            )
+        )
+    if set(connections) != {spec.alias for spec in specs}:
+        missing = sorted(set(connections) - {spec.alias for spec in specs})
+        raise ValueError(f"Missing PNL0003 parameter blocks: {missing}")
+    return tuple(specs)
+
+
+def load_test_mql_pnl00r_specs(
+    archive_path: str | Path,
+    *,
+    cir_member: str = "test_mql_.cir",
+) -> tuple[TestMqlPnl00rSpec, ...]:
+    """Load resolved PNL00R geometry from the AMESim source."""
+    with tarfile.open(archive_path) as archive:
+        cir_file = archive.extractfile(cir_member)
+        if cir_file is None:
+            raise ValueError(f"Missing AMESim circuit member: {cir_member}")
+        cir_text = cir_file.read().decode("latin1")
+
+    numeric_globals = {
+        name: value
+        for name, expression in GLOBAL_PARAMETERS.items()
+        if (value := resolve_numeric_expression(expression, {})) is not None
+    }
+    connections = {
+        str(connection["alias"]): connection
+        for connection in CONNECTION_SPECS
+        if connection["submodel"] == "PNL00R"
+    }
+    specs = []
+    for block in re.findall(r"<LINE>.*?</LINE>", cir_text, flags=re.DOTALL):
+        if _optional_text(block, "SUB_NAME") != "PNL00R":
+            continue
+        alias = _required_text(block, "ALIAS")
+        connection = connections.get(alias)
+        if connection is None:
+            raise ValueError(f"PNL00R line {alias!r} is absent from CONNECTION_SPECS")
+        real_parameters = _parameter_expressions(block, "RPARAM")
+        integer_parameters = _parameter_expressions(block, "IPARAM")
+        specs.append(
+            TestMqlPnl00rSpec(
+                alias=alias,
+                source_component=str(connection["source_component"]),
+                source_port=str(connection["source_port"]),
+                target_component=str(connection["target_component"]),
+                target_port=str(connection["target_port"]),
+                diameter_mm=_required_numeric(
+                    alias, "diam", real_parameters, numeric_globals
+                ),
+                length_m=_required_numeric(alias, "le", real_parameters, numeric_globals),
+                relative_roughness=_required_numeric(
+                    alias, "rr", real_parameters, numeric_globals
+                ),
+                gas_type_index=int(
+                    _required_numeric(alias, "gi", integer_parameters, numeric_globals)
+                ),
+            )
+        )
+    if set(connections) != {spec.alias for spec in specs}:
+        missing = sorted(set(connections) - {spec.alias for spec in specs})
+        raise ValueError(f"Missing PNL00R parameter blocks: {missing}")
+    return tuple(specs)
+
+
 def _parameter_expressions(block: str, tag_name: str) -> dict[str, str]:
     parameters = {}
     for parameter_block in re.findall(
@@ -141,11 +322,11 @@ def _required_numeric(
     variables: dict[str, float],
 ) -> float:
     if name not in expressions:
-        raise ValueError(f"Missing {name!r} on PNL0001 line {alias!r}")
+        raise ValueError(f"Missing {name!r} on line {alias!r}")
     value = resolve_numeric_expression(expressions[name], variables)
     if value is None:
         raise ValueError(
-            f"Cannot resolve {name!r}={expressions[name]!r} on PNL0001 line {alias!r}"
+            f"Cannot resolve {name!r}={expressions[name]!r} on line {alias!r}"
         )
     return value
 

PythonModels/systems/test_mql_pneumatic_lines.py

@@ -7,10 +7,18 @@ from PythonModels.components.amesim_pneumatic import (
     HELIUM_PNEUMATIC_GAS,
     AmesimPneumaticGas,
 )
-from PythonModels.components.amesim_pneumatic_line import AmesimPnl0001Pipe
+from PythonModels.components.amesim_pneumatic_line import (
+    AmesimPnl0001Pipe,
+    AmesimPnl0003Pipe,
+    AmesimPnl00rPipe,
+)
 from PythonModels.systems.test_mql_line_parameters import (
     TestMqlPnl0001Spec,
+    TestMqlPnl0003Spec,
+    TestMqlPnl00rSpec,
     load_test_mql_pnl0001_specs,
+    load_test_mql_pnl0003_specs,
+    load_test_mql_pnl00r_specs,
 )
 
 
@@ -26,6 +34,30 @@ class TestMqlPnl0001Assembly:
         raise KeyError(alias)
 
 
+@dataclass(frozen=True)
+class TestMqlPnl0003Assembly:
+    specs: tuple[TestMqlPnl0003Spec, ...]
+    lines: dict[str, AmesimPnl0003Pipe]
+
+    def spec(self, alias: str) -> TestMqlPnl0003Spec:
+        for spec in self.specs:
+            if spec.alias == alias:
+                return spec
+        raise KeyError(alias)
+
+
+@dataclass(frozen=True)
+class TestMqlPnl00rAssembly:
+    specs: tuple[TestMqlPnl00rSpec, ...]
+    lines: dict[str, AmesimPnl00rPipe]
+
+    def spec(self, alias: str) -> TestMqlPnl00rSpec:
+        for spec in self.specs:
+            if spec.alias == alias:
+                return spec
+        raise KeyError(alias)
+
+
 def build_test_mql_pnl0001_assembly(
     archive_path: str | Path,
     *,
@@ -48,3 +80,48 @@ def build_test_mql_pnl0001_assembly(
         for spec in specs
     }
     return TestMqlPnl0001Assembly(specs=specs, lines=lines)
+
+
+def build_test_mql_pnl0003_assembly(
+    archive_path: str | Path,
+    *,
+    gas: AmesimPneumaticGas = HELIUM_PNEUMATIC_GAS,
+) -> TestMqlPnl0003Assembly:
+    specs = load_test_mql_pnl0003_specs(archive_path)
+    lines = {
+        spec.alias: AmesimPnl0003Pipe(
+            name=spec.alias,
+            diameter_mm=spec.diameter_mm,
+            length_m=spec.length_m,
+            relative_roughness=spec.relative_roughness,
+            polytropic_constant=spec.polytropic_constant,
+            heat_transfer_coefficient=spec.heat_transfer_coefficient,
+            external_temperature_k=spec.external_temperature_k,
+            gas=gas,
+            p1_0=spec.initial_absolute_pressure_1_pa,
+            T1_0=spec.initial_temperature_1_k,
+            p2_0=spec.initial_absolute_pressure_2_pa,
+            T2_0=spec.initial_temperature_2_k,
+        )
+        for spec in specs
+    }
+    return TestMqlPnl0003Assembly(specs=specs, lines=lines)
+
+
+def build_test_mql_pnl00r_assembly(
+    archive_path: str | Path,
+    *,
+    gas: AmesimPneumaticGas = HELIUM_PNEUMATIC_GAS,
+) -> TestMqlPnl00rAssembly:
+    specs = load_test_mql_pnl00r_specs(archive_path)
+    lines = {
+        spec.alias: AmesimPnl00rPipe(
+            name=spec.alias,
+            diameter_mm=spec.diameter_mm,
+            length_m=spec.length_m,
+            relative_roughness=spec.relative_roughness,
+            gas=gas,
+        )
+        for spec in specs
+    }
+    return TestMqlPnl00rAssembly(specs=specs, lines=lines)

tests/test_amesim_pneumatic_line_components.py

@@ -0,0 +1,109 @@
+from __future__ import annotations
+
+import unittest
+
+from PythonModels.components.amesim_pneumatic_line import (
+    AmesimPnl0003Pipe,
+    AmesimPnl00rPipe,
+)
+
+
+class AmesimPnl0003PipeTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.pipe = AmesimPnl0003Pipe(
+            name="pneumatic_88",
+            diameter_mm=20.0,
+            length_m=0.3,
+            relative_roughness=0.045 / 20.0,
+            p1_0=15.3e6,
+            p2_0=15.3e6,
+            T1_0=293.15,
+            T2_0=293.15,
+        )
+
+    def test_initial_state_uses_two_half_volume_compliances(self) -> None:
+        port_1 = self.pipe.properties_1()
+        port_2 = self.pipe.properties_2()
+
+        self.assertAlmostEqual(self.pipe.volume, 9.424777960769381e-5)
+        self.assertAlmostEqual(self.pipe.compliance_volume, self.pipe.volume / 2.0)
+        self.assertEqual(len(self.pipe.get_state_vector()), 4)
+        self.assertAlmostEqual(port_1.p, 15.3e6, delta=1.0e-5)
+        self.assertAlmostEqual(port_2.p, 15.3e6, delta=1.0e-5)
+        self.assertAlmostEqual(port_1.T, 293.15)
+        self.assertAlmostEqual(port_2.T, 293.15)
+
+    def test_center_resistance_flow_follows_end_pressure_gradient(self) -> None:
+        state = self.pipe.get_state_vector()
+        state[0] *= 1.01
+        state[1] *= 1.01
+        self.pipe.set_state_vector(state)
+
+        forward = self.pipe.resistance_mass_flow()
+        state[0] /= 1.01 * 1.01
+        state[1] /= 1.01 * 1.01
+        state[2] *= 1.01
+        state[3] *= 1.01
+        self.pipe.set_state_vector(state)
+        reverse = self.pipe.resistance_mass_flow()
+
+        self.assertGreater(forward, 0.0)
+        self.assertLess(reverse, 0.0)
+
+    def test_connection_derivatives_conserve_internal_center_flow_mass(self) -> None:
+        state = self.pipe.get_state_vector()
+        state[0] *= 1.01
+        state[1] *= 1.01
+        self.pipe.set_state_vector(state)
+
+        d1, d2 = self.pipe.derivatives_from_connections(
+            port_1_m_flow=0.2,
+            connected_h_1=self.pipe.properties_1().h + 1000.0,
+            port_2_m_flow=-0.1,
+            connected_h_2=self.pipe.properties_2().h - 1000.0,
+        )
+
+        self.assertAlmostEqual(d1.m + d2.m, 0.1)
+
+
+class AmesimPnl00rPipeTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.pipe = AmesimPnl00rPipe(
+            name="pneumatic_100",
+            diameter_mm=14.0,
+            length_m=1.0,
+            relative_roughness=0.045 / 14.0,
+        )
+
+    def test_stateless_resistance_flow_follows_pressure_gradient(self) -> None:
+        forward = self.pipe.mass_flow(
+            port_1_pressure_pa=15.31e6,
+            port_1_temperature_k=293.15,
+            port_2_pressure_pa=15.29e6,
+            port_2_temperature_k=293.15,
+        )
+        reverse = self.pipe.mass_flow(
+            port_1_pressure_pa=15.29e6,
+            port_1_temperature_k=293.15,
+            port_2_pressure_pa=15.31e6,
+            port_2_temperature_k=293.15,
+        )
+
+        self.assertGreater(forward, 0.0)
+        self.assertLess(reverse, 0.0)
+        self.assertAlmostEqual(abs(forward), abs(reverse), delta=abs(forward) * 0.01)
+
+    def test_diagnostics_expose_darcy_terms(self) -> None:
+        diagnostics = self.pipe.diagnostics(
+            mass_flow_kg_s=1.0e-4,
+            pressure_pa=15.3e6,
+            temperature_k=293.15,
+        )
+
+        self.assertGreater(diagnostics.reynolds_number, 0.0)
+        self.assertGreater(diagnostics.gas_velocity_m_s, 0.0)
+        self.assertGreater(diagnostics.pressure_drop_pa, 0.0)
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_test_mql_pnl0003_pnl00r.py

@@ -0,0 +1,94 @@
+from __future__ import annotations
+
+import unittest
+from pathlib import Path
+
+from PythonModels.reporting.amesim_results import load_test_mql_amesim_results
+from PythonModels.systems.test_mql import TestMqlSystem
+from PythonModels.systems.test_mql_line_parameters import (
+    load_test_mql_pnl0003_specs,
+    load_test_mql_pnl00r_specs,
+)
+from PythonModels.systems.test_mql_pneumatic_lines import (
+    build_test_mql_pnl0003_assembly,
+    build_test_mql_pnl00r_assembly,
+)
+
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+TEST_MQL_AME = REPO_ROOT / "AmesimModels" / "test_mql.ame"
+
+
+class TestMqlPnl0003AndPnl00rTests(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls) -> None:
+        cls.pnl0003_specs = load_test_mql_pnl0003_specs(TEST_MQL_AME)
+        cls.pnl00r_specs = load_test_mql_pnl00r_specs(TEST_MQL_AME)
+        cls.pnl0003_assembly = build_test_mql_pnl0003_assembly(TEST_MQL_AME)
+        cls.pnl00r_assembly = build_test_mql_pnl00r_assembly(TEST_MQL_AME)
+        cls.results = load_test_mql_amesim_results(TEST_MQL_AME)
+
+    def test_loads_all_real_pnl0003_parameters_from_cir(self) -> None:
+        self.assertEqual(len(self.pnl0003_specs), 8)
+        spec = self.pnl0003_assembly.spec("pneumatic_88")
+
+        self.assertEqual(spec.source_component, "pn_node3_9")
+        self.assertEqual(spec.target_component, "pn_morifice_9")
+        self.assertEqual(spec.diameter_mm, 20.0)
+        self.assertEqual(spec.length_m, 0.3)
+        self.assertAlmostEqual(spec.relative_roughness, 0.045 / 20.0)
+        self.assertEqual(spec.gas_type_index, 1)
+        self.assertEqual(spec.mode, 2)
+        self.assertAlmostEqual(spec.initial_gauge_pressure_1_pa, 15_198_700.0)
+        self.assertAlmostEqual(spec.initial_gauge_pressure_2_pa, 15_198_700.0)
+        self.assertAlmostEqual(spec.initial_absolute_pressure_1_pa, 15_300_000.0)
+        self.assertAlmostEqual(spec.initial_absolute_pressure_2_pa, 15_300_000.0)
+
+    def test_loads_all_real_pnl00r_parameters_from_cir(self) -> None:
+        self.assertEqual(len(self.pnl00r_specs), 4)
+        spec = self.pnl00r_assembly.spec("pneumatic_100")
+
+        self.assertEqual(spec.source_component, "pn_node3_9")
+        self.assertEqual(spec.target_component, "pn_node3_10")
+        self.assertEqual(spec.diameter_mm, 14.0)
+        self.assertEqual(spec.length_m, 1.0)
+        self.assertAlmostEqual(spec.relative_roughness, 0.045 / 14.0)
+        self.assertEqual(spec.gas_type_index, 1)
+
+    def test_builds_pnl0003_and_pnl00r_physical_line_components(self) -> None:
+        self.assertEqual(len(self.pnl0003_assembly.lines), 8)
+        self.assertEqual(len(self.pnl00r_assembly.lines), 4)
+        self.assertTrue(
+            all(len(line.get_state_vector()) == 4 for line in self.pnl0003_assembly.lines.values())
+        )
+
+    def test_pneumatic_88_initial_observables_match_amesim_baseline(self) -> None:
+        pipe = self.pnl0003_assembly.lines["pneumatic_88"]
+
+        self.assertAlmostEqual(
+            pipe.properties_1().p - 101_300.0,
+            self.results.series("p1@pneumatic_88")[0],
+            delta=1.0e-5,
+        )
+        self.assertAlmostEqual(
+            pipe.properties_2().p - 101_300.0,
+            self.results.series("p2@pneumatic_88")[0],
+            delta=1.0e-5,
+        )
+        self.assertAlmostEqual(
+            pipe.gas_mass_g(),
+            self.results.series("mgas@pneumatic_88")[0],
+            delta=0.005,
+        )
+
+    def test_system_exposes_real_pnl0003_and_pnl00r_assemblies(self) -> None:
+        system = TestMqlSystem()
+
+        self.assertEqual(system.typed_pnl0003_line_count, 8)
+        self.assertEqual(system.typed_pnl00r_line_count, 4)
+        self.assertIn("pneumatic_88", system.pnl0003_assembly.lines)
+        self.assertIn("pneumatic_100", system.pnl00r_assembly.lines)
+
+
+if __name__ == "__main__":
+    unittest.main()