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CppCheck expm1 on FluidCoolers #10877

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Jan 9, 2025
Merged

CppCheck expm1 on FluidCoolers #10877

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2 changes: 1 addition & 1 deletion src/EnergyPlus/FluidCoolers.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -1949,7 +1949,7 @@ void CalcFluidCoolerOutlet(
Real64 NumTransferUnits = UAdesign / CapacityRatioMin;
Real64 ETA = std::pow(NumTransferUnits, 0.22);
Real64 A = CapacityRatio * NumTransferUnits / ETA;
Real64 effectiveness = 1.0 - std::exp((std::exp(-A) - 1.0) / (CapacityRatio / ETA));
Real64 effectiveness = 1.0 - std::exp(std::expm1(-A) / (CapacityRatio / ETA));

// calculate water to air heat transfer
_Qactual = effectiveness * CapacityRatioMin * (_InletWaterTemp - InletAirTemp);
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