[Equest-users] pre-school simulation and a few basic questions

[Joe Huang]

Noa,

eQUEST uses the DOE-2.2 building energy simulation program as its simulation "engine".  
DOE-2 takes into consideration humidity quite well, and in humid locations latent loads 
can be as much as 40% of the total cooling loads. The air-conditioner is controlled with a 
thermostat that turns it on when the indoor temperatures exceed the scheduled cooling 
control temperature.  You can also model natural ventilation (i.e., opening windows in a 
residential building) or mechanical ventilation (i.e., an economizer in a commercial 
building) when the outside conditions are suitable.  In other words, you will be able to 
model the building and its air-conditioning system in a very realistic way.  As far as 
changing the  R-value of the walls, that's certainly easy to do, but keep in mind that DOE-2
models the building surfaces in a more detailed method that requires you to input the 
thermal characteristics layer by layer (thickness, conductivity, and specific heat).  As 
for modeling the air-conditioner, DOE-2 allows input for the steady-state or design 
efficiency that are then modified hour-by-hour using performance curves based on the 
outside air conditions and part-load-ratio.  If you don't have
this information, there are default efficiencies and performance curves.

Joe

Joe Huang
White Box Technologies, Inc.
346 Rheem Blvd., Suite 108D
Moraga CA 94556
yjhuang at whiteboxtechnologies.com
www.whiteboxtechnologies.com
(o) (925)388-0265
(c) (510)928-2683
"building energy simulations at your fingertips"


On 3/5/2013 7:33 AM, noa at gbwawa wrote:
>
> Hi all,
>
> My name is Noa and I'm just starting to get to know e-Quest.
>
> I'm doing a research on Passive elements in pre-schools and I have a few questions:
>
> 1. Is e-Quest taking into consideration the relative humidity and does it have any 
> effect on the results of the simulation?
>
> 2. When dose an air conditioner starts to work?
>
> 3. Can I insert only the R value of a wall and get good results?
>
> 4. is there a list of common values for pre-school air conditioner?
>
> Thank you very much,
>
> Noa Hakak
>
> נעה חקאק
>
> WAWAייעוץ לתכנון בניה ירוקה
>
> 03-7325126
>
> Description: Description: Description: Description: Description: 
> cid:image001.jpg at 01CC3CA7.08EAEAC0
>
> www.gbwawa.com <http://www.gbwawa.com/>
>
> noa at gbwawa.com <mailto:noa at gbwawa.com>
>
>
> _______________________________________________
> Equest-users mailing list
> http://lists.onebuilding.org/listinfo.cgi/equest-users-onebuilding.org
> To unsubscribe from this mailing list send  a blank message to EQUEST-USERS-UNSUBSCRIBE at ONEBUILDING.ORG
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130305/049323ec/attachment-0002.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 3753 bytes
Desc: not available
URL: <http://lists.onebuilding.org/pipermail/equest-users-onebuilding.org/attachments/20130305/049323ec/attachment-0002.jpeg>