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RE: [EnergyPlus_Support] Re: What is the best modelling strategy ? I need help to clarify this issue!!!
I've copied a link to the DesignBuilder help page on this topic as I think it adds a couple of things to the debate on use of zone multipliers
http://www.designbuilder.co.uk/helpv3/Content/Zone%20Multiplier.htm
Namely:
1. The significance of putting the 'mid-floor' zone approximately in the middle of the height of the building to ensure that the right wind speed is applied and that any shading from other buildings is approximately right.
2. Use of adiabatic surfaces at the bottom of the top floor zones and top of ground floor zones and,
3. Provision of shading surfaces to ensure that missing zones do not impact on shading elsewhere in a more complex model.
Andy
Andy Tindale
DesignBuilder Software ltd
www.designbuilder.com
Tel: +44 (0)1453 755500
-----Original Message-----
From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of obb
Sent: 21 November 2011 15:14
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: [EnergyPlus_Support] Re: What is the best modelling strategy ? I need help to clarify this issue!!!
Thanks Dr. Li
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, YuanLu Li <yli006@...> wrote:
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> No one said that the multiplier must be even, and there must be equal or gaps on top and bottom of the mid floor. You are not going to design a mid floor and then remove it for a two storey building. Can a two storey building with no roof? Is there a plenum or attic? A two storey building may have 5 or 6 levels and not just 2. 3 storey, no gaps. 5 storey 1 gap above, and 1 gab below. Can you have no gap below? What do you do with 4 storey? I should just model it in full. You are paid to do so.If the floors are of the same design, the full building is not difficult to create. Do not forget the plenum zones, false ceilings, etc. Unless you are an experienced building designer who can under the result listings, my advice is do not try the short cut. Let EPlus do the calculations rather than based on your estimation. I am not going to pay you for a six green star report with gaps in the building. Dr. Li
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: eee.javed@...
> Date: Sat, 19 Nov 2011 18:16:28 +0530
> Subject: Re: [EnergyPlus_Support] Re: What is the best modelling strategy ? I need help to clarify this issue!!!
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> Interesting Discussion:)
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> If I understand correctly.. for 10 floors we have to create 1 ground floor, 1 Top Floor and one middle floor with correct height and 8 floor multiplier for middle floor then software will create equal floors downside and upside of the middle floor.
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> What happens if we have odd number of Floors like 3, 5,7 etc.?
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> Please correct me if i am wrong..
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