Javed,
The only method I have attempted is the CO2 method. The program has to determine outdoor air flow based on something it can measure / calculate. CO2 is one of those and the only one in common use. In theory, outdoor air could be controlled based on occupancy schedules (I actually designed a system back in the 80s which did that), but that?s not common.
That?s all for now.
(But CO2 probably is not calculated by E+ unless you are sing a CO2-based control)
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Javed Iqbal
Sent: Monday, September 03, 2012 12:24 PM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Std 62.1 visualization in Result summary
Thanks a lot Jim. I'm trying with the example files comes with Eplus installation. There are basically four type of DCV modeling methodology has been explained 1. Indoor Air Quality based 2. Proportional Control (CO2 based) 3. Simple based on Floor area and Occupancy 4. Ventilation Rate procedure. If I'm correct CO2 concentration might be applicable for Proportional Control (CO2 based) type of modeling procedure. I would further explore this in I/O file to get better idea on DCV modeling. Any suggestions?
On Mon, Sep 3, 2012 at 7:55 AM, Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Dear Javed,
1. It seems that the ASHRAE 62.1 report should be unaffected by the use of demand control ventilation. This is because 62.1 focusses on peak ventilation requirements, whereas DCV affects off-peak ventilation.
2. If you do not have a variable for ?Zone Air Carbon Dioxide Concentration? in your .rdd, then I suspect you have not defined DCV fully. I think the CO2 variable is triggered by the ZoneControl:ContaminantContoller object. I?ve shown the relevant objects below.
p.s., I do not understand the DCV process in E+ completely, and I am open to feedback!
DesignSpecification:OutdoorAir
Name
OADesign_Entry
Outdoor Air Method
Flow/Zone
Outdoor Air Flow per Person
0.0035
Outdoor Air Flow per Zone Floor Area
0.000082
Outdoor Air Flow per Zone
Outdoor Air Flow Air Changes per Hour
0.100
Outdoor Air Flow Rate Fraction Schedule Name
Controller:MechanicalVentilation
Name
VentController_Entry
Availability Schedule Name
SchCpct_FanSuperMkt
Demand Controlled Ventilation
Yes
System Outdoor Air Method
IndoorAirQualityProcedure
Zone 1 Name
Entry
DesignSpec OA Object name1
OADesign_Entry
Zone Air Distribution Effectiveness in Cooling Mode 1
1.00
Zone Air Distribution Effectiveness in Heating Mode 1
0.80
Zone Air Distribution Effectiveness Schedule Name 1
ZoneControl:ContaminantController
Name
ContamControl_Entry
Controlled Zone Name
Entry
Carbon Dioxide Control Availability Schedule Name
SchCpct_AlwaysOn
Carbon Dioxide Setpoint Schedule Name
SchCpct_CO2rm
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Javed Iqbal
Sent: Monday, September 03, 2012 7:15 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: Re: [EnergyPlus_Support] Std 62.1 visualization in Result summary
Thanks for you reply. Buy i don't find any of the following variable in .rdd report. though carbon equivalent pollution from CO2 is there. Basically i want to see following report after simulating Demand control ventilation.
On Mon, Sep 3, 2012 at 4:22 PM, Jim Dirkes <jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
Try adding ?Output:Variable, ZoneName, Zone Air Carbon Dioxide Concentration, Timestep;? to your output variables.
James V Dirkes II, PE, BEMP, LEED AP
www.buildingperformanceteam.com
Energy Analysis, Commissioning & Training Services
1631 Acacia Drive, Grand Rapids, MI 49504 USA
616 450 8653
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Javed Iqbal
Sent: Monday, September 03, 2012 12:54 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Std 62.1 visualization in Result summary
Hi All,
I'm trying to model DCV and exploring file HeatPumpVRP_DCV.idf to see the output but when i run the simulation, the standard 62.1Summary doesn't have any output data. How to visualize this?
Thanks!
--
Javed Iqbal, LEED AP, CEA
Energy Analyst
--
Javed Iqbal, LEED AP, CEA
Energy Analyst
--
Javed Iqbal, LEED AP, CEA
Energy Analyst
--Javed Iqbal, LEED AP, CEAEnergy Analyst
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
![]()
Your email settings: Individual Email|Traditional
Change settings via the Web (Yahoo! ID required)
Change settings via email: Switch delivery to Daily Digest | Switch to Fully Featured
Visit Your Group | Yahoo! Groups Terms of Use | Unsubscribe
__,_._,___