Thank you Julien for your quick answer,
I have input 0.0001125 m3/s corresponding at ca 25 person CO2 generation rate assuming the zone is occupied between 07:50-13:30 and 14:30-16:10.
Contaminant Source or Sink CO2 Gain Volume Flow Rate [m3/s] output corresponds to the input value described above (0.0001125 m3/s). While Zone Contaminant Source or Sink CO2 Gain Volume Flow Rate [m3/s] increases over time. I don’t understand
why this output increases over time.
The zone also has an effective air leakage area of 25 cm2 and a ventilation rate of 600 m3/hr over the occupied time.
a
From: EnergyPlus_Support@xxxxxxxxxxxxxxx <EnergyPlus_Support@xxxxxxxxxxxxxxx>
Sent: Wednesday, March 11, 2020 7:32 AM
To: energyplus_support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] ZoneContaminantSourceAndSink:CarbonDioxide outputs
Hello,
What did you input for the object in question? It generates Co2 for a zone based on a carbon generation design rate multiplied by a schedule. Cf I/O reference guide
https://bigladdersoftware.com/epx/docs/9-2/input-output-reference/group-internal-gains-people-lights-other.html#zonecontaminantsourceandsinkcarbondioxide
So if you put something non zero in there, it's normal you're seeing this.
Julien
--
Sent from a mobile device, please excuse the brevity.
Julien Marrec, EBCP, BPI MFBA
Owner
Direct: +33 6 95 14 42 13
Website: www.effibem.com
On Mar 10, 2020, at 17:42, "Belleri Annamaria
annamaria.belleri@xxxxxxxxx [EnergyPlus_Support]" <energyplus_support@xxxxxxxxxxxxxxx> wrote:
Dear group members,
I am modelling CO2 generated by people within a thermal zone through the ZoneContaminantSourceAndSink:CarbonDioxide. I have set the carbon dioxide generation rate as 0 in people object and I have no electric equipment generating carbon dioxide in my model.
According to the description in the input/output reference, I would expect that the following two outputs report same amount of generated CO2:
- Contaminant Source or Sink CO2 Gain Volume Flow Rate [m3/s]
- Zone Contaminant Source or Sink CO2 Gain Volume Flow Rate [m3/s]
However Zone Contaminant Source or Sink CO2 Gain Volume Flow Rate reports higher CO2 gains compared to the first output mentioned. Here is a plot comparing both outputs:
Could you please explain that?
Thank you
Kind regards
Annamaria Belleri, PhD
Eurac Research
Senior researcher
Institute for Renewable Energy
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