Hello Guys,
How can I change the ventilation rate for a building in eQUEST software for only three months of the year (Dec, Jam & Feb)?
Your help will be highly appreciated.
Regards
Ahmad
Hello Guys,
Did? anyone have a chance to review my question in my email below?
I found the option to add "Minimum OA Schedule" but this schedule is fraction of what? Is it fraction of the CFM/person values that we enter in the Zones? I have added this schedule and changed the fractions and the energy consumption and the heating loads have been changed but the OA air flow rate & ratio in the report SV-A has not changed? Am I missing something??
If the "Minimum OA Schedule" changes the OA flow rate, then where can I find this value? I am trying to change the OA flow rate for a specific value for only three months per year for pandemic mitigation so how can I do that?
Any help will be highly appreciated
Regards
Ahmad
On Thursday, 28 September 2023 at 04:29:56 pm AEST, Ahmad Fraij wrote:
Hello Guys,
How can I change the ventilation rate for a building in eQUEST software for only three months of the year (Dec, Jam & Feb)?
Your help will be highly appreciated.
Regards
Ahmad
Are you trying to vary the system CFM or OA CFM? See below for eQuest?s definition of Minimum OA Sch. The minimum OA schedule varies the hourly OA ratio. To create an annual schedule to vary the CFM seasonally you can create an additional set of weekly/daily schedules, and then set the run times in the annual schedule.
Hello Ethan,Thanks for your replyI am trying to change the OA CFM. I created schedules as you suggest below but I could not find the OA CFM fora each zone after I apply these schedules and the OA CFM in the report SV-A did not change.Do you know where can I find the OA CFM after I apply the new miniminum outside air schedule?Thanks for the help againRegardsAhmad
-------- Original message --------
I don?t believe there is report that shows monthly OA CFM, but I could be wrong. Just looking through the ?S? reports now and I?m not seeing that. I?d probably run a before and after case and check the difference in total OA to see if it?s in the ballpark. This could be done with a parametric run and pulling up both simulation reports side by side and reviewing the total difference.
Thanks Ethan for your helpWhich simulation report shows the the total OA CFM? If it is SV-A, then please note that the OA CFM in this report does not change by changing the minimum OA schedule. Please advise.Thanks Gain for your helpRegardsAhmad
-------- Original message --------
The only way I know to see OA directly is with the Hourly reports either by System or Zone. Look under the Project & Site Tab - Simulation Output
For HVAC System select Supply Air Flow and Ratio of OA to total SA. Depending on the zone equipment you can get it in a similar way.
[cid:image001.png at 01D9F2F2.0F4D6C80]
[cid:image009.png at 01D9F2F2.9F60A9E0]
Melissa Crowe, BEMP, LEED AP
cmta.com
[cid:image003.png at 01D9F2F1.7F41F750][cid:image004.png at 01D9F2F1.7F41F750][cid:image005.png at 01D9F2F1.7F41F750][cid:image006.png at 01D9F2F1.7F41F750][cid:image007.png at 01D9F2F1.7F41F750]
Hello Guys, wrote:
Did? anyone have a chance to review my question in my email below?
I found the option to add "Minimum OA Schedule" but this schedule is fraction of what? Is it fraction of the CFM/person values that we enter in the Zones? I have added this schedule and changed the fractions and the energy consumption and the heating loads have been changed but the OA air flow rate & ratio in the report SV-A has not changed? Am I missing something??
If the "Minimum OA Schedule" changes the OA flow rate, then where can I find this value? I am trying to change the OA flow rate for a specific value for only three months per year for pandemic mitigation so how can I do that?
Any help will be highly appreciated
Regards
Ahmad
On Thursday, 28 September 2023 at 04:29:56 pm AEST, Ahmad Fraij
Hello Guys,
How can I change the ventilation rate for a building in eQUEST software for only three months of the year (Dec, Jam & Feb)?
Your help will be highly appreciated.
Regards
Ahmad
Ahmad,
Are you trying to vary the system CFM or OA CFM? See below for eQuest?s definition of Minimum OA Sch. The minimum OA schedule varies the hourly OA ratio. To create an annual schedule to vary the CFM seasonally you can create an additional set of weekly/daily schedules, and then set the run times in the annual schedule.
[cid:image001.png at 01D9F2A7.51D23090]
_______________________________________________
Ethan Seaman
Sustainable Design Analyst
SMMA
t: 617.520.9288
www.smma.com
Hello Ethan,Thanks for your replyI am trying to change the OA CFM. I created schedules as you suggest below but I could not find the OA CFM fora each zone after I apply these schedules and the OA CFM in the report SV-A did not change.Do you know where can I find the OA CFM after I apply the new miniminum outside air schedule?Thanks for the help againRegardsAhmad
-------- Original message --------
I don?t believe there is report that shows monthly OA CFM, but I could be wrong. Just looking through the ?S? reports now and I?m not seeing that. I?d probably run a before and after case and check the difference in total OA to see if it?s in the ballpark. This could be done with a parametric run and pulling up both simulation reports side by side and reviewing the total difference.
_______________________________________________
Ethan Seaman
Sustainable Design Analyst
SMMA
t: 617.520.9288
www.smma.com
Thanks Ethan for your helpWhich simulation report shows the the total OA CFM? If it is SV-A, then please note that the OA CFM in this report does not change by changing the minimum OA schedule. Please advise.Thanks Gain for your helpRegardsAhmad
-------- Original message --------
Hi Ethan
The only way I know to see OA directly is with the Hourly reports either by System or Zone. Look under the Project & Site Tab - Simulation Output
For HVAC System select Supply Air Flow and Ratio of OA to total SA. Depending on the zone equipment you can get it in a similar way.
[cid:image001.png at 01D9F2F2.0F4D6C80]
[cid:image009.png at 01D9F2F2.9F60A9E0]
Melissa Crowe, BEMP, LEED AP[cid:image004.png at 01D9F2F1.7F41F750][cid:image006.png at 01D9F2F1.7F41F750]
cmta.com
[cid:image003.png at 01D9F2F1.7F41F750]