Hi, Sruba
How you feed the air to the atrium depends on your building design.
If you are designing a new building, then you should look at the requirements.
You can have an atrium with or without balcony or elevated walk way, etc.
You may have local fire regulations to determine the air lock requirement.
Who owns the atrium area, also determines the system configuration. It may be just one passive zone with many cross air mixing from the tenants systems, so that the owner need not pay for the HVAC cost of the atrium area..
YuMing's model was to study the atrium temperature using the EPlus room air analysis assuming that the conditioned air is fed from the ground floor, and sixth floor, while all the other zones are conditioned to the same temperature.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: sruba_seshadri@xxxxxxxxx
Date: Thu, 18 Feb 2010 09:54:12 -0800
Subject: Re: [EnergyPlus_Support] Re: For help:room air models
Thanks Dr. Li.
I will try using the 5zone example and add skylight and try increasing ceiling height to simulate atrium. I have looked at different approaches for heating and cooling issues related to atrium. I searched the documentation for Eplus and could not find anything on whether I should put heating and cooling for atrium or treat it as a floating space etc. Any help or pointers along these lines will be greatly appreciated.
I will also look for the older idf file posted.
Thanks
Sruba
I will try using the 5zone example and add skylight and try increasing ceiling height to simulate atrium. I have looked at different approaches for heating and cooling issues related to atrium. I searched the documentation for Eplus and could not find anything on whether I should put heating and cooling for atrium or treat it as a floating space etc. Any help or pointers along these lines will be greatly appreciated.
I will also look for the older idf file posted.
Thanks
Sruba
From: YuanLu Li <yli006@hotmail.
To: Linda <energyplus_support@
Sent: Thu, February 18, 2010 9:45:28 AM
Subject: RE: [EnergyPlus_
Hi, Sruba
I do not know what you want to have in your atrium.
If you take a standard 5Zone example and add a skylight in the central zone, you will have a atrium. There is a skylight example in the exampleFfiles folder. You can increase the height of the center zone by adding more storeys on the surrouonding zones, or simply increasing the ceiling height.
The IDF for the older posting by liyuming1123@ 163.com may still be in the EPlus file server.
Dr. Li (Yuen Liu)
To: EnergyPlus_Support@ yahoogroups. com
From: sruba_seshadri@ yahoo.com
Date: Thu, 18 Feb 2010 03:46:18 +0000
Subject: [EnergyPlus_ Support] Re: For help:room air models
Hi
Does anyone have an idf file of a building or space with an atrium. I need to learn more about how an atrium is modeled. I have been looking at older postings and looking at different options for modeling the air flow in an atrium.
Even if there are no example idf files with atrium, can you please point me to the idf file mentioned in this posting?
Any pointers to papers or information as to how EnergyPlus deals with atriums is greatly appreciated.
Thanks
Sruba
--- In EnergyPlus_Support@ yahoogroups. com, Yuen Liu <yli006@...> wrote:
>
>
> Hi, Maize
> I have a look at the IDF building entries. I think that the warnings, on average ceiling height of 42 m, was generated by your using auto-calculate for the Atrium ceiling height and 4 m for the EL1-Atrium (roof) height.
>
> If you change the ceiling height of EL1 Atrium from 4 to 80 m, the roof of the Atrium will be move up to the top of the building. The warning should disappear.
>
> I have not found the infutration of the atrium of 0.4ACH, and the cause for warnings:-
>
>
> ** Warning ** Inside surface heat balance did not converge with Max Temp Difference [C] =3.872E-003 vs Max Allowed Temp Diff [C] =2.000E-003 ** ~~~ ** During Sizing, Occurrence info=SUMMER DESIGN DAY IN SHANGHAI, 07/15 07:30 - 07:31
>
> You may try increasing the timestep from 4 to 6 or 12. The difference is very small and could ignored.
> I would like to know how you entered the building information. Did you use another software, such as AUTOCAD? I ask about this, because there are a number of zero coordinates entered as a very small exponential number.
>
> EPlus allows you to define a partition (surface of another zone) so that you do not have to define a wall and a reverse wall construction. The ceiling air space can be declared as a plenum and acts as a mixer. In this way, the ceiling and floor are separate, and there is no need for a reverse floor or roof as construction.
>
> Because the ceiling height is low, you may not need to do the non-dimentional calculation for the room air temperature.
>
> I have not found the roof-glazed atrium yet.
>
> By dimention in my mail, I was referring the building coordinates.
>
> Non-dimentional height calculation, I think, can be done for both controlled and un-controlled periods, as it is trying to take into account of the variation of temperature in a zone. You may need to provide two patterns.
>
> I am still learning. Comments from other users are welcome.
>
> Dr. Li.
>
>
>
>
>
> To: EnergyPlus_Support@ ...: liyuming1123@ ...: Sat, 20 Dec 2008 05:22:05 +0000Subject: [EnergyPlus_ Support] For help:room air models
>
>
>
>
> Thank you!I have another problem of this mo
Live connected with Hotmail on your phone. Learn more.
Does anyone have an idf file of a building or space with an atrium. I need to learn more about how an atrium is modeled. I have been looking at older postings and looking at different options for modeling the air flow in an atrium.
Even if there are no example idf files with atrium, can you please point me to the idf file mentioned in this posting?
Any pointers to papers or information as to how EnergyPlus deals with atriums is greatly appreciated.
Thanks
Sruba
--- In EnergyPlus_Support@ yahoogroups. com, Yuen Liu <yli006@...> wrote:
>
>
> Hi, Maize
> I have a look at the IDF building entries. I think that the warnings, on average ceiling height of 42 m, was generated by your using auto-calculate for the Atrium ceiling height and 4 m for the EL1-Atrium (roof) height.
>
> If you change the ceiling height of EL1 Atrium from 4 to 80 m, the roof of the Atrium will be move up to the top of the building. The warning should disappear.
>
> I have not found the infutration of the atrium of 0.4ACH, and the cause for warnings:-
>
>
> ** Warning ** Inside surface heat balance did not converge with Max Temp Difference [C] =3.872E-003 vs Max Allowed Temp Diff [C] =2.000E-003 ** ~~~ ** During Sizing, Occurrence info=SUMMER DESIGN DAY IN SHANGHAI, 07/15 07:30 - 07:31
>
> You may try increasing the timestep from 4 to 6 or 12. The difference is very small and could ignored.
> I would like to know how you entered the building information. Did you use another software, such as AUTOCAD? I ask about this, because there are a number of zero coordinates entered as a very small exponential number.
>
> EPlus allows you to define a partition (surface of another zone) so that you do not have to define a wall and a reverse wall construction. The ceiling air space can be declared as a plenum and acts as a mixer. In this way, the ceiling and floor are separate, and there is no need for a reverse floor or roof as construction.
>
> Because the ceiling height is low, you may not need to do the non-dimentional calculation for the room air temperature.
>
> I have not found the roof-glazed atrium yet.
>
> By dimention in my mail, I was referring the building coordinates.
>
> Non-dimentional height calculation, I think, can be done for both controlled and un-controlled periods, as it is trying to take into account of the variation of temperature in a zone. You may need to provide two patterns.
>
> I am still learning. Comments from other users are welcome.
>
> Dr. Li.
>
>
>
>
>
> To: EnergyPlus_Support@ ...: liyuming1123@ ...: Sat, 20 Dec 2008 05:22:05 +0000Subject: [EnergyPlus_ Support] For help:room air models
>
>
>
>
> Thank you!I have another problem of this mo
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