On Sep 8, 2011 6:16 PM, "Linda Lawrie" <
linda@xxxxxxxxxxxxxx> wrote:
> Yes. If the HVAC system components are autosized
> (sizing:zone, sizing:system) then the multiplier
> will be applied automatically to the autosized
> values. For example, if outdoor air requirements
> are autosized the values in sizing:zone should be
> for a single instance of the zone.
>
> If the HVAC system components are hard-sized
> using values in the components, then the sizes
> must be the multiplied number. For example, a
> system supplying 100 cfm to a single instance of
> Zone1, must supply 700 cfm if Zone1 has a multiplier of 7.
>
> At 11:44 AM 9/8/2011, Vinay Devanathan wrote:
>
>
>>Sure, Linda. Thanks! That will be great.
>>
>>But for now -
>>
>>Is the HVAC system of a zone with multiplier
>>treated the same as described in the Multiplier
>>field description of the Zone object?
>>
>>Thanks much!
>>
>>Vinay
>>
>>On Thu, Sep 8, 2011 at 1:27 PM, Linda Lawrie
>><<mailto:
linda@xxxxxxxxxxxxxx>
linda@xxxxxxxxxxxxxx> wrote:
>>
>>
>>Looks like it did not get included in the V6 Tips & Tricks document.
>>
>>Hopefully for V7. If I get the article massaged
>>before release, will put it or send it to you.
>>
>>At 09:12 AM 9/8/2011, Linda Lawrie wrote:
>>
>>
>>>I cannot at the moment. I do not have access to
>>>the docs. Tips is not that big. Just look at
>>>the bookmarks. Or maybe it didn t get in v6.
>>>
>>>
>>>
>>>Vinay Devanathan
>>><<mailto:
vinay.devanathan@xxxxxxxxx>
vinay.devanathan@xxxxxxxxx> wrote:
>>Linda,
>>Â
>>I don't find anything on the Tips and Tricks
>>document. I am not sure why this would be, I
>>cant search for a text "Multiplier", the results return no matching strings.
>>Â
>>Could you please give me the page number in the PDF? Sorry for the trouble.
>>Â
>>Vinay
>>
>>
>>On Thu, Sep 8, 2011 at 10:35 AM, Linda Lawrie
>><<mailto:
linda@xxxxxxxxxxxxxx>
linda@xxxxxxxxxxxxxx> wrote:
>>Â
>>Look at the tips and tricks doc. It has a
>>section on multipliers. If it doesn't answer the question, tell me.
>>
>>Vinay Devanathan
>><<mailto:
vinay.devanathan@xxxxxxxxx>
vinay.devanathan@xxxxxxxxx> wrote:
>>
>>Mr. Dirkes,
>>Â
>>Thanks for your reply.
>>Â
>>I think its the other way round. There is some
>>description on Zone Multipliers under the Zone
>>object in the Multiplier field. It seems like
>>the inputs should be good enough to take care of the mutiplied loads.
>>Â
>>Vinay
>>On Wed, Sep 7, 2011 at 6:22 PM, Jim Dirkes
>><<mailto:
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
>>
jim@xxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>>Â
>>Dear Vinay,
>>Â
>>Try reporting the airflow and fan power to see
>>if itâ??s the value you specify or 7x that
>>value. I have not used the zone multiplier,
>>but Iâ??m guessing that it multiplies CFM in the
>>same magnitude as the multiplier, so you now may have a fan at 7 x 7 = 49x.
>>Â
>>The Building Performance Team
>>James V. Dirkes II, P.E., BEMP , LEED AP
>>1631 Acacia Drive NW
>>Grand Rapids, MI 49504
>><tel:616%20450%208653>616 450 8653
>>
>>Â
>>
>>From:
>><mailto:
EnergyPlus_Support@xxxxxxxxxxxxxxx>
EnergyPlus_Support@xxxxxxxxxxxxxxx >>[ mailto:
EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Vinay Devanathan
>>Sent: Wednesday, September 07, 2011 6:04 PM
>>To:
>><mailto:
EnergyPlus_Support@xxxxxxxxxxxxxxx>
EnergyPlus_Support@xxxxxxxxxxxxxxx
>>Subject: [EnergyPlus_Support] Zone/Floor Multiplier
>>
>>Â
>>
>>Â
>>
>>Hello,
>>
>>Â
>>
>>I am seeing very high fan power on one of my
>>simulations and hence wanted to check for this issue.
>>
>>Â
>>
>>Let's say there are 7 typical floors and one
>>zone is created and a Zone Group object is used
>>to replicate the 7 floors using a multiplier.
>>Now in all of those zones, the zone loads will
>>be calculated and multiplied by a factor of 7.
>>So in order to satisfy this zone should we input
>>the designed zone CFM * 7 in the input field for
>>HVAC objects or input just the designed zone CFM
>>and the software will mutliply it? It would be
>>great if someone can clarify this.
>>
>>Â
>>
>>I have it at 7 * designed zone cfm, and hence
>>doubting my approach due to high fan power. At
>>the same time I feel this is the way to do it from vague prior memory.
>>
>>Â
>>
>>Thank you in advance.
>>
>>Â
>>
>>Vinay
>>
>>Â
>>
>>
>>
>>
>>
>>
>>
>>
>>