That's a very good observation but obviously you also need to know the airflow in an out of the room (extraction and supply of CO2), and the room vplume (ppm is a ratio...), and then again solving the differential equation, and there might not be an analytical solution.
This paper should prove interesting if that's a road you want to take.
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Le 26 févr. 2016 à 06:35, "Jean Marais jeannieboef@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> a écrit :
That is strange. ppm is a concentration. Perhaps the generation can be desribed in a "change in concentration rate" ...d_ppm/s?
On 25 Feb 2016 7:57 pm, "Javed Iqbal eee.javed@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:Thanks Jim. I found ASHRAE 62.1-2007 the CO2 generation rate is 0.0084 cfm/met/person. Now i will reverse calculate generation rate based on ppm from experimental data.Thanks,On Fri, Feb 26, 2016 at 12:06 AM, Jim Dirkes jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:Javed,You are correct.m3/s is a rate (the speed at which the contaminant is introduced to the zone). ppm is a concentration, the current amount of contaminant.You'll have to estimate the rate.--On Thu, Feb 25, 2016 at 1:18 PM, Javed Iqbal eee.javed@xxxxxxxxx [EnergyPlus_Support] <EnergyPlus_Support@xxxxxxxxxxxxxxx> wrote:Hi,I'm just looking at the ZoneContaminantSourceAndSink:CarbonDioxide object and noticing that the generation rate is in m3/s. The monitoring data I have measures ppm unfortunately. Do you know a way to use ppm in e+? It seems to me like the units probably can't or shouldn't be converted.Thanks in advance,--Javed Iqbal, LEED AP, CEASr. Energy AnalystJames V Dirkes II, PE, BEMP, LEED AP
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