换热器质量模型建立-关联式函数实现、PCHE结构参数初始化

brayton_cycle/properties.py

@@ -15,7 +15,7 @@ class CO2PropertyCalculator():
         self.rp.SETUPdll(2, 'SI', 'SI', 'DEF')
         self.z = [1.0]
         self.mw = self.rp.WMOLdll(self.z)
-    def calculate_properties(self, T=None, P=None, h=None, s=None):
+    def calculate_properties(self, T=None, P=None, h=None, s=None, include_transport=False):
         """计算二氧化碳物性"""
         if T is not None and P is not None:
             # 已知Tp
@@ -60,6 +60,32 @@ class CO2PropertyCalculator():
         
         # 补充提取的物性，这里由于后续还要使用，不进行参数变换
         properties['D'] = result.D
-        properties['cp'] = result.Cp   
-        properties['cv'] = result.Cv,     
+        properties['cp'] = result.Cp
+        properties['cv'] = result.Cv,
+        properties['rho'] = result.D * self.mw
+        properties['cp_mass'] = result.Cp / self.mw * 1000.0
+        properties['cv_mass'] = result.Cv / self.mw * 1000.0
+        if include_transport:
+            self._add_transport_properties(properties, result)
         return properties
+
+    def _add_transport_properties(self, properties, result):
+        """Add CO2 transport properties needed by PCHE correlations."""
+        transport = self.rp.TRNPRPdll(properties['T'], result.D, self.z)
+        if getattr(transport, 'ierr', 0) > 0:
+            raise ValueError(f"REFPROP transport calculation error:{transport.ierr}")
+
+        viscosity_micro_pa_s = getattr(transport, 'eta', None)
+        thermal_conductivity = getattr(transport, 'tcx', None)
+        if viscosity_micro_pa_s is None:
+            viscosity_micro_pa_s = getattr(transport, 'visc', None)
+        if thermal_conductivity is None:
+            thermal_conductivity = getattr(transport, 'tcond', None)
+        if viscosity_micro_pa_s is None or thermal_conductivity is None:
+            raise ValueError("REFPROP transport result missing viscosity or conductivity")
+
+        viscosity_pa_s = viscosity_micro_pa_s * 1.0e-6
+        properties['mu'] = viscosity_pa_s
+        properties['viscosity'] = viscosity_pa_s
+        properties['lambda'] = thermal_conductivity
+        properties['thermal_conductivity'] = thermal_conductivity