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Hello users, I need to compare TRNSYS 16 and EnergyPlus 9.1. I use the IDF Editor for modelling my building. Now I want to figure out why the results of infiltration are different in both programs.

In TRNSYS air density is 1.204 kg/m³ and the specific heat of air is 1.012 kJ/kg K

What is the default air density in EnergyPlus? Or is EnergyPlus using the "Site Outdoor Air Density" for the calculation of the infiltration energy?

And where can I define the heat of air capacity? Is it correct, if I use the "ZoneCapacitanceMultiplier:ResearchSpecial" and set the Temperature Capacity Multiplier to 1,012?

Thank you.

Kind regards Arne

Hello users, I need to compare TRNSYS 16 and EnergyPlus 9.1. I use the IDF Editor for modelling my building. Now I want to figure out why the results of infiltration are different in both programs.

In TRNSYS air density is 1.204 kg/m³ and the specific heat of air is 1.012 kJ/kg K

What is the default air density in EnergyPlus? Or is EnergyPlus using the "Site Outdoor Air Density" for the calculation of the infiltration energy?

And where can I define the heat of air capacity? Is it correct, if I use the "ZoneCapacitanceMultiplier:ResearchSpecial" and set the Temperature Capacity Multiplier to 1,012?

Thank you.

Kind regards Arne