Fix EMS Surface Properties Init - Follow up to #11478

src/EnergyPlus/HeatBalanceManager.cc

@@ -2612,6 +2612,11 @@ namespace HeatBalanceManager {
         using OutAirNodeManager::SetOutAirNodes;
         using WindowEquivalentLayer::InitEquivalentLayerWindowCalculations;
 
+        if (state.dataGlobal->AnyEnergyManagementSystemInModel) {
+            HeatBalanceSurfaceManager::InitEMSControlledConstructions(state);
+            HeatBalanceSurfaceManager::InitEMSControlledSurfaceProperties(state);
+        }
+
         if (state.dataGlobal->BeginSimFlag) {
             AllocateHeatBalArrays(state); // Allocate the Module Arrays
             if (state.dataHeatBal->AnyCTF || state.dataHeatBal->AnyEMPD) {
@@ -2656,11 +2661,6 @@ namespace HeatBalanceManager {
             }
         }
 
-        if (state.dataGlobal->AnyEnergyManagementSystemInModel) {
-            HeatBalanceSurfaceManager::InitEMSControlledConstructions(state);
-            HeatBalanceSurfaceManager::InitEMSControlledSurfaceProperties(state);
-        }
-
         // Init storm window pointers
         if (state.dataSurface->TotStormWin > 0) {
             if (state.dataGlobal->BeginDayFlag) {

testfiles/HeatPumpWaterToAirWithHumControlDewPoint.idf

@@ -103,7 +103,7 @@
 ! Environmental Emissions:        None
 ! Utility Tariffs:                None
 
-  Version,26.1;
+  Version,26.2;
 
   Building,
     Building,                !- Name

testfiles/PythonPluginCondFD_Enet.idf

@@ -4,7 +4,7 @@
 ! Python plugin test for CondFD sky LW radiation override.
 ! Based on 1ZoneCondFD_Enet_Test.idf with PythonPlugin setting Enet = -200 W/m2.
 
-  Version,26.1;
+  Version,26.2;
 
 !-   ===========  ALL OBJECTS IN CLASS: SIMULATIONCONTROL ===========
 

testfiles/PythonPluginCondFD_Enet.py

@@ -79,14 +79,41 @@
 # === Configuration ===
 SURFACE_NAME = "Zn001:Roof001"
 ENET_VALUE = -200.0  # W/m2
+MATERIAL_NAME = "C5 - 4 IN HW CONCRETE"
+THERMAL_ABSORPTANCE_VALUE = 0.75
 
 
 class EnetSkyOverride(EnergyPlusPlugin):
 
     def __init__(self):
         super().__init__()
         self.need_to_get_handles = True
+        self.need_to_get_material_handle = True
         self.enet_handle = None
+        self.thermal_absorptance_handle = None
+
+    def on_begin_zone_timestep_before_init_heat_balance(self, state) -> int:
+        if self.need_to_get_material_handle:
+            self.thermal_absorptance_handle = self.api.exchange.get_actuator_handle(
+                state,
+                "Material",
+                "Surface Property Thermal Absorptance",
+                MATERIAL_NAME,
+            )
+            if self.thermal_absorptance_handle == -1:
+                self.api.runtime.issue_severe(
+                    state,
+                    f"EnetSkyOverride: no thermal absorptance actuator for material '{MATERIAL_NAME}'.",
+                )
+                return 1
+            self.need_to_get_material_handle = False
+
+        self.api.exchange.set_actuator_value(
+            state,
+            self.thermal_absorptance_handle,
+            THERMAL_ABSORPTANCE_VALUE,
+        )
+        return 0
 
     def on_begin_timestep_before_predictor(self, state) -> int:
         if self.need_to_get_handles:

tst/EnergyPlus/unit/HeatBalanceManager.unit.cc

@@ -70,6 +70,7 @@
 #include <EnergyPlus/HVACSystemRootFindingAlgorithm.hh>
 #include <EnergyPlus/HeatBalanceAirManager.hh>
 #include <EnergyPlus/HeatBalanceManager.hh>
+#include <EnergyPlus/HeatBalanceSurfaceManager.hh>
 #include <EnergyPlus/IOFiles.hh>
 #include <EnergyPlus/InputProcessing/InputProcessor.hh>
 #include <EnergyPlus/Material.hh>
@@ -2400,6 +2401,38 @@ TEST_F(EnergyPlusFixture, HeatBalanceManager_EMSConstructionSwitchTestCondFD)
     EXPECT_TRUE(state->dataSurface->SurfEMSConstructionOverrideON(surfNum));
 }
 
+TEST_F(EnergyPlusFixture, HeatBalanceManager_EMSMaterialThermalAbsorptanceUpdatesConstructionProperties)
+{
+    constexpr Real64 initialThermalAbsorptance = 0.9;
+    constexpr Real64 emsThermalAbsorptance = 0.35;
+
+    state->dataMaterial->materials.allocate(1);
+    auto *mat = new Material::MaterialBase;
+    mat->Name = "ROOF MATERIAL";
+    mat->group = Material::Group::Regular;
+    mat->AbsorpThermal = initialThermalAbsorptance;
+    mat->AbsorpThermalInput = initialThermalAbsorptance;
+    mat->AbsorpThermalEMSOverrideOn = true;
+    mat->AbsorpThermalEMSOverride = emsThermalAbsorptance;
+    state->dataMaterial->materials(1) = mat;
+
+    state->dataHeatBal->TotConstructs = 1;
+    state->dataConstruction->Construct.allocate(1);
+    auto &construction = state->dataConstruction->Construct(1);
+    construction.Name = "ROOF CONSTRUCTION";
+    construction.TotLayers = 1;
+    construction.LayerPoint.allocate(1);
+    construction.LayerPoint(1) = 1;
+    construction.InsideAbsorpThermal = initialThermalAbsorptance;
+    construction.OutsideAbsorpThermal = initialThermalAbsorptance;
+
+    HeatBalanceSurfaceManager::InitEMSControlledSurfaceProperties(*state);
+
+    EXPECT_EQ(mat->AbsorpThermal, emsThermalAbsorptance);
+    EXPECT_EQ(construction.InsideAbsorpThermal, emsThermalAbsorptance);
+    EXPECT_EQ(construction.OutsideAbsorpThermal, emsThermalAbsorptance);
+}
+
 TEST_F(EnergyPlusFixture, HeatBalanceManager_GetSpaceData)
 {
     // Test input processing of Space object