Update data/ashrae_tables.py

data/ashrae_tables.py

@@ -581,6 +581,20 @@ class ASHRAETables:
         except Exception as e:
             raise ValueError(f"Error applying climatic corrections: {str(e)}")
 
+    def get_cltd_wall(self, wall_group: str, orientation: str, hour: int) -> float:
+        """Get CLTD value for a wall."""
+        if wall_group not in self.cltd_wall:
+            raise ValueError(f"Invalid wall group: {wall_group}")
+        orientation_map = {e.value: e.name for e in Orientation}
+        orientation_abbr = orientation_map.get(orientation, orientation)
+        if orientation_abbr not in self.cltd_wall[wall_group].columns:
+            raise ValueError(f"Invalid orientation: {orientation}")
+        # Normalize hour to 0-23 range for cyclic data
+        normalized_hour = hour % 24
+        if normalized_hour not in self.cltd_wall[wall_group].index:
+            raise ValueError(f"Invalid hour: {hour} (normalized to {normalized_hour})")
+        return float(self.cltd_wall[wall_group].loc[normalized_hour, orientation_abbr])
+
     def calculate_corrected_cltd_wall(self, wall_group: str, orientation: str, hour: int, latitude: str, month: str, color: str, outdoor_temp: float, indoor_temp: float) -> float:
         """
         Calculate corrected CLTD for a wall with climatic corrections.
@@ -602,8 +616,13 @@ class ASHRAETables:
             ValueError: If inputs are invalid or correction fails.
         """
         try:
+            # Validate hour
+            if not isinstance(hour, int):
+                raise ValueError(f"Hour must be an integer, got: {hour}")
+            # Normalize hour to 0-23 range
+            normalized_hour = hour % 24
             # Get base CLTD
-            base_cltd = self.get_cltd_wall(wall_group, orientation, hour)
+            base_cltd = self.get_cltd_wall(wall_group, orientation, normalized_hour)
             # Apply climatic corrections
             corrected_cltd = self._apply_climatic_corrections(base_cltd, latitude, month, color, outdoor_temp, indoor_temp)
             return corrected_cltd