Update data/ashrae_tables.py

data/ashrae_tables.py

@@ -186,6 +186,31 @@ class ASHRAETables:
             0.75: 1.075, # Medium to Dark surfaces
             0.9: 1.15    # Dark surfaces
         }
+
+    def _load_month_correction(self) -> Dict[str, float]:
+        """
+        Load month correction factors for CLTD based on ASHRAE Handbook—Fundamentals (2017, Chapter 18).
+        Returns: Dictionary mapping months to correction factors (dimensionless).
+        """
+        try:
+            # Correction factors for CLTD based on month (approximate, for solar radiation variation)
+            # Values are placeholders; adjust based on ASHRAE Table 7 or specific project data
+            return {
+                'Jan': 0.90,
+                'Feb': 0.92,
+                'Mar': 0.95,
+                'Apr': 0.98,
+                'May': 1.00,
+                'Jun': 1.02,
+                'Jul': 1.03,
+                'Aug': 1.02,
+                'Sep': 0.99,
+                'Oct': 0.96,
+                'Nov': 0.92,
+                'Dec': 0.90
+            }
+        except Exception as e:
+            raise Exception(f"Error loading month correction table: {str(e)}")
     
     def _load_latitude_correction(self) -> pd.DataFrame:
         """