[Equest-users] [eQuest-users] Simulation problems with infiltration and ventilation for a grocery store at Mexico City

[josÿffffffffffe9 luis bermÿfffffffffffadez]

Dear Mr. Hupel:
 
Thank you for your suggestion.  Another point is that the grocery store is the first floor of a mid-rise building.  Therefore, I cannot place any rooftop air-conditioning systems.  Any more suggestions will be appreciated.
 
Kind regards,
 
Jose Luis Bermudez Alcocer.

   

________________________________
 De: Mike Hupel <mhupel at aegiseng.ca>
Para: 'josÿffffffffffe9 luis bermÿfffffffffffadez' <beralco at yahoo.com.mx>; equest-users at lists.onebuilding.org 
Enviado: Miércoles, 24 de julio, 2013 14:22:06
Asunto: RE: [Equest-users] [eQuest-users] Simulation problems with infiltration	and ventilation for a grocery store at Mexico City
  


Without looking at the model I can flag a few items for consideration.  The people load is too high.  ASHRAE 62.1-2010 Table 6-1 has an occupancy density of 8 people per 1000 ft².  That would put your people load at 74 people not 138.  The infiltration ACH rate is good however if the store has a vestibule the infiltration rate of the vestibule should be calculated and modeled.  See ASHRAE vestibule infiltration formula for information.  
 
Hope this helps 
 
 
Michael Hupel, B.Tech, CEM, LEED®AP
Senior Mechanical Designer
 
Aegis Engineering Inc.
56 Pennsylvania Ave. Suite 18
Concord, ON L4K 3V9
(905) 761-1264 ext. 24
(905) 761-6949 fax
(647) 702-3316 cell
 
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From:equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of josÿffffffffffe9 luis bermÿfffffffffffadez
Sent: July-24-13 3:07 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] [eQuest-users] Simulation problems with infiltration and ventilation for a grocery store at Mexico City
 
Dear all,
 
I am working with an energy analysis in eQuest of a grocery store at Mexico City.   The grocery store is a small 9,217 sq.ft. with 138 people (approx) at the same time (67 sq.ft./person).  The only loads that I am using are lighting and appliances.  The store is considered as a "dry store".  I am not placing any big commercial refrigerator for meat.  
 
I have some problems with the infiltration and ventilation. The more I read about these topics and try to apply the information to the model, the more confused I get over and over again.  I am not sure if I have introduced the right data to eQuest.  I used 0.161 ACH for infiltration from the following source in page 32 (infiltration) in the internal loads for the space properties:
 
http://www.nrel.gov/docs/fy08osti/42828.pdf
 
I am not sure if I input this in the right place.  The ventilation is another issue that I do not have any clue.  What should I put and where should I put it?  These are the only problems, with my limited experience, that could be causing some problems.    I am attaching the INP and the PD2 files plus an AutoCAD file, because I drew the floorplan and imported it to eQuest.  Please, any help will be greatly appreciated.
 
Kind regards,
 
Jose Luis Bermudez Alcocer.
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