Fix negative cooling coil capacity warning when system cooling load available

src/EnergyPlus/SimAirServingZones.cc

@@ -6398,6 +6398,7 @@ void UpdateSysSizing(EnergyPlusData &state, Constant::CallIndicator const CallIn
                     state.dataSize->SensCoolCapTemp(AirLoopNum) = sysSizing.SensCoolCap;
                     if (sysSizing.coolingPeakLoad == DataSizing::PeakLoad::SensibleCooling) {
                         state.dataSize->CalcSysSizing(AirLoopNum).DesCoolVolFlow = sysSizing.DesCoolVolFlow;
+                        state.dataSize->CalcSysSizing(AirLoopNum).CoolDDNum = DDNum;
                         state.dataSize->CalcSysSizing(AirLoopNum).CoolDesDay = sysSizing.CoolDesDay;
                         // state.dataSize->CalcSysSizing( AirLoopNum ).CoinCoolMassFlow = SysSizing( DDNum, AirLoopNum ).CoinCoolMassFlow;
                         state.dataSize->CalcSysSizing(AirLoopNum).MassFlowAtCoolPeak = sysSizing.MassFlowAtCoolPeak;
@@ -6432,6 +6433,7 @@ void UpdateSysSizing(EnergyPlusData &state, Constant::CallIndicator const CallIn
                     state.dataSize->TotCoolCapTemp(AirLoopNum) = sysSizing.TotCoolCap;
                     if (sysSizing.coolingPeakLoad == DataSizing::PeakLoad::TotalCooling) {
                         state.dataSize->CalcSysSizing(AirLoopNum).DesCoolVolFlow = sysSizing.DesCoolVolFlow;
+                        state.dataSize->CalcSysSizing(AirLoopNum).CoolDDNum = DDNum;
                         state.dataSize->CalcSysSizing(AirLoopNum).CoolDesDay = sysSizing.CoolDesDay;
                         // state.dataSize->CalcSysSizing( AirLoopNum ).CoinCoolMassFlow = SysSizing( DDNum, AirLoopNum ).CoinCoolMassFlow;
                         state.dataSize->CalcSysSizing(AirLoopNum).MassFlowAtCoolPeak = sysSizing.MassFlowAtCoolPeak;
@@ -6770,6 +6772,7 @@ void UpdateSysSizing(EnergyPlusData &state, Constant::CallIndicator const CallIn
         for (std::size_t i = 0; i < state.dataSize->FinalSysSizing.size(); ++i) {
             auto &z = state.dataSize->FinalSysSizing[i];
             auto &c = state.dataSize->CalcSysSizing[i];
+            z.CoolDDNum = c.CoolDDNum;
             z.CoolDesDay = c.CoolDesDay;
             z.HeatDesDay = c.HeatDesDay;
             z.CoinCoolMassFlow = c.CoinCoolMassFlow;

src/EnergyPlus/VariableSpeedCoils.cc

@@ -4132,12 +4132,18 @@ namespace VariableSpeedCoils {
 
                         CoolCapAtPeak = (rhoair * VolFlowRate * (MixEnth - SupEnth)) + FanCoolLoad;
                         if (CoolCapAtPeak < 0) { // This conditional will also catch the initialization value, -999.0
-                            ShowWarningError(
-                                state,
-                                std::format(
-                                    "In calculating capacity for coil {} on design day {}, the air state would yield negative coil capacity sizing.",
-                                    varSpeedCoil.Name,
-                                    state.dataSize->FinalSysSizing(state.dataSize->CurSysNum).CoolDesDay));
+                            if (finalSysSizing.CoolDDNum > 0) {
+                                ShowWarningError(state,
+                                                 std::format("In calculating capacity for coil {} on design day {} when system cooling load is "
+                                                             "available, the air state would yield negative coil capacity sizing.",
+                                                             varSpeedCoil.Name,
+                                                             finalSysSizing.CoolDesDay));
+                            } else {
+                                ShowWarningError(state,
+                                                 std::format("In calculating capacity for coil {} when system cooling load is not available, the air "
+                                                             "state would yield negative coil capacity sizing.",
+                                                             varSpeedCoil.Name));
+                            }
                             ShowContinueError(state, EnergyPlus::format("The air properties are: T_mix = {:.4R}", MixTemp));
                             ShowContinueError(state, EnergyPlus::format("                        T_supply = {:.4R}", SupTemp));
                             ShowContinueError(state, EnergyPlus::format("                        H_mix = {:.4R}", MixEnth));