增加质量计算接口

brayton_cycle/__init__.py

@@ -1,6 +1,7 @@
 """Tools for CO2 Brayton cycle simulation and optimization."""
 
 from .components import (
+    ComponentMassMixin,
     Compressor,
     Concentrator,
     Condenser,
@@ -26,6 +27,7 @@ from .sensitivity import (
 
 __all__ = [
     "BraytonCycle",
+    "ComponentMassMixin",
     "CO2PropertyCalculator",
     "Compressor",
     "Concentrator",