Re: [EnergyPlus_Support] ZoneContaminantSourceAndSink:CarbonDioxide Input

["Jean Marais jeannieboef@xxxxxxxxx [EnergyPlus_Support]" <EnergyPlus_Support@xxxxxxxxxxxxxxx>]

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, CEA

Sr. Energy Analyst 

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James V Dirkes II, PE, BEMP, LEED AP
CEO/President
The Building Performance Team Inc.
1631 Acacia Dr, GR, Mi 49504

Direct: 616.450.8653
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx

Website l  LinkedIn

Truth does not evolve, and get "more true" over time. Truth has a source and is unchanging.

--

Javed Iqbal, LEED AP, CEA

Sr. Energy Analyst 

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Posted by: Jean Marais <jeannieboef@xxxxxxxxx>

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