[Bldg-sim] Bldg-sim Digest, Vol 37, Issue 6

[zhang xiangjing]

Reply for
  1. M&E Rooms, Restrooms, storage & Thermal zoning
     (Jaigath Chandraprakash)
Hi Jaigath

I think you can simulate M&E rooms, or restrooms and other as unconditioned
zone.

One points is the exhaust ventilation can take the internal heat outside.
For example, in the M&E room, there is some devices which are emitting heat
into air.
If you simulate them as uncondictioned, I think you'd better remove the
internal heat gain (lighting, equipment, and other).

The main affect that you simulate them as unconditioned zone is: the air
temperature will be higher than real conditioned, and the heat exchange
between these unconditioned zones and air-conditioned zone will increase a
little. However, this should be very small..

Regards
zhang xiangjing

On Mon, Dec 6, 2010 at 8:53 PM, <bldg-sim-request at lists.onebuilding.org>wrote:

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>   1. M&E Rooms, Restrooms, storage & Thermal zoning
>      (Jaigath Chandraprakash)
>
>
> ---------- Forwarded message ----------
> From: Jaigath Chandraprakash <cjaigath at yahoo.com>
> To: bldg-sim at lists.onebuilding.org
> Date: Sun, 5 Dec 2010 22:20:38 -0800 (PST)
> Subject: [Bldg-sim] M&E Rooms, Restrooms, storage & Thermal zoning
>  Hello,
>
>
> I am modeling an retail building and I would just like to know if other
> modelers just simply model rooms like M&E rooms, storage rooms and restrooms
> as unconditioned space. The  M&E rooms and storagerooms are not heated and
> is just served by exhaust fans so I can simply model it as unconditioned. Is
> this correct? Table G3.1.10. HVAC Systems says that "Where no heating system
> exists or heating has been specified, the heating system shall be assumed
> elec" and "Where no cooling system exist or no cooling system has been
> specified, the cooling system shal be identical to the system modeled in
> the baseline building design". So I am thinking that I may not be following
> this section of Appendix G.
>
> For restrooms which are in the office area and has just exhaust
> ventilation, do I simulate it as conditioned since it will be drawing
> conditioned air in the office or should I just simulate it as unconditioned
> area since the room has no thermostat?
>
> I am also attaching a floor plan and would like to have your comments if I
> am zoning right or if it has too many zones.
>
>
> Thanks in advance,
>
>
> Jaigath
>
>
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