Update app/hvac_loads.py

app/hvac_loads.py

@@ -20,6 +20,8 @@ from utils.ctf_calculations import CTFCalculator, ComponentType, CTFCoefficients
 from utils.solar import SolarCalculations  # Import SolarCalculations for SHGC data
 from app.m_c_data import SAMPLE_MATERIALS, SAMPLE_FENESTRATIONS, DEFAULT_MATERIAL_PROPERTIES, DEFAULT_WINDOW_PROPERTIES
 import plotly.express as px
+import uuid
+run_id = str(uuid.uuid4())
 
 # Configure logging
 logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
@@ -809,7 +811,7 @@ def make_pie(data: Dict[str, float], title: str) -> px.pie:
     fig.update_traces(textinfo='percent+label', hoverinfo='label+percent+value')
     return fig
 
-def display_hvac_results_ui(loads: List[Dict[str, Any]]):
+def display_hvac_results_ui(loads: List[Dict[str, Any]], run_id: str = "default"):
     """Display HVAC load results with enhanced UI elements in a two-column format."""
     st.subheader("HVAC Load Results")
     
@@ -943,10 +945,14 @@ def display_hvac_loads_page():
         st.header("HVAC Loads")
         st.markdown("Configure and calculate HVAC loads for the building.")
 
+        # Generate a unique run ID for this session
+        import uuid
+        run_id = str(uuid.uuid4())
+
         # Check for existing results
+        loads = []
         if (st.session_state.project_data.get("hvac_loads", {}).get("cooling", {}).get("hourly") or
             st.session_state.project_data.get("hvac_loads", {}).get("heating", {}).get("hourly")):
-            loads = []
             cooling_loads = st.session_state.project_data["hvac_loads"]["cooling"].get("hourly", [])
             heating_loads = st.session_state.project_data["hvac_loads"]["heating"].get("hourly", [])
             loads.extend(cooling_loads)
@@ -955,7 +961,7 @@ def display_hvac_loads_page():
             loads = sorted(loads, key=lambda x: (x["month"], x["day"], x["hour"]))
             if loads:
                 st.info("Displaying previously calculated HVAC load results.")
-                display_hvac_results_ui(loads)
+                display_hvac_results_ui(loads, run_id=run_id)
 
         # Location Information
         st.subheader("Location Information")
@@ -967,7 +973,7 @@ def display_hvac_loads_page():
             "Latitude": climate_data.get("location", {}).get("latitude", 0.0),
             "Longitude": climate_data.get("location", {}).get("longitude", 0.0),
             "Elevation": climate_data.get("location", {}).get("elevation", 0.0),
-            "Time Zone": climate_data.get("location", {}).get("timezone", 0.0),
+            "Time Zone": climate_data.get("location", {}).get("timezone", "UTC"),
             "Ground Reflectivity": climate_data.get("ground_reflectivity", 0.2)
         }
         
@@ -1013,7 +1019,7 @@ def display_hvac_loads_page():
                 "Time Zone (UTC offset)",
                 min_value=-12.0,
                 max_value=14.0,
-                value=location_data["Time Zone"],
+                value=float(location_data["Time Zone"]) if isinstance(location_data["Time Zone"], (int, float, str)) else 0.0,
                 step=0.5,
                 key="hvac_timezone"
             )
@@ -1178,7 +1184,13 @@ def display_hvac_loads_page():
                             hvac_settings=hvac_settings
                         )
 
-                        # Update session state with results
+                        # Clear previous HVAC loads from session state
+                        st.session_state.project_data["hvac_loads"] = {
+                            "cooling": {"hourly": [], "peak": 0, "charts": {}, "breakdown": {}},
+                            "heating": {"hourly": [], "peak": 0, "charts": {}, "breakdown": {}}
+                        }
+
+                        # Update session state with new results
                         cooling_loads = [load for load in loads if load["total_cooling"] > 0]
                         heating_loads = [load for load in loads if load["total_heating"] > 0]
                         st.session_state.project_data["hvac_loads"]["cooling"]["hourly"] = cooling_loads
@@ -1204,8 +1216,8 @@ def display_hvac_loads_page():
                         st.session_state.project_data["hvac_loads"]["cooling"]["breakdown"] = cooling_breakdown
                         st.session_state.project_data["hvac_loads"]["heating"]["breakdown"] = heating_breakdown
 
-                        # Display Results UI
-                        display_hvac_results_ui(loads)
+                        # Display Results UI with unique run_id
+                        display_hvac_results_ui(loads, run_id=run_id)
 
                         st.success("HVAC loads calculated successfully.")
                         logger.info("HVAC loads calculated and stored in session state")