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CO2 concentration in room with SpawnOfEnergyPlus

asked 2021-11-22 10:41:33 -0600

MPK gravatar image

updated 2021-11-22 11:35:27 -0600

I ventilate the model with outside air with a CO2 concentration of 400 PPM. However, the CO2 concentration in the room settles at 261 PPM. What could be the cause of this problem?

Here is how I add CO2 to the fluid mix: package Medium=Buildings.Media.Air(extraPropertiesNames={"CO2"})

Here is how I define the outside CO2 concentration in the source block: fill(400/1000000, 1)

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answered 2021-11-23 09:23:22 -0600

MPK gravatar image

I found the answer:

The fill command uses weight fractions, not PPM. Air has a weight of 29 g/mol. CO2 has a weight of 44 g/mol.

--> fill(400/1000000*44/29, 1)

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Asked: 2021-11-22 10:41:33 -0600

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Last updated: Nov 23