校准第二支路热流体能量与管路摩擦

tests/test_amesim_pnl0002_pnl0003_component.py

@@ -151,6 +151,23 @@ class AmesimPnl0002ComponentTests(unittest.TestCase):
 
         self.assertAlmostEqual(derivative[0], 0.1)
 
+    def test_connection_derivative_uses_energy_balanced_node_enthalpy(self) -> None:
+        pipe = AmesimPnl0002("pnl_2", self.medium)
+        props = pipe.properties()
+        pipe.port_1.m_flow = 0.2
+        pipe.port_2.m_flow = 0.1
+        reference_h = props.h + 10_000.0
+        pipe.update_flow_temperature_references(
+            {"port_1": reference_h, "port_2": reference_h}
+        )
+
+        derivative = pipe.state_derivative_from_ports(
+            {"port_1": props.h, "port_2": props.h}
+        )
+
+        self.assertAlmostEqual(derivative[0], 0.3)
+        self.assertAlmostEqual(derivative[1], 0.3 * props.h)
+
 
 class AmesimPnl0003ComponentTests(unittest.TestCase):
     def setUp(self) -> None: