[Equest-users] Equipment Load

[Fred Betz]

I typically use 85% of the heat is captured by the hood assuming that the hood is design correctly and sufficiently extends beyond the cooking surface. If it's an existing kitchen, then it maybe less. ASHRAE Applications has some information, but the hood manufacturer and/or kitchen consultant should have a project specifc capture efficiency. 

Also, not all of the equipment load is under a hood so you may want to look at the kitchen layout and prorate accordingly. 

Also, don't forget to put the rest of the energy directly on the electric and gas meter. 

You still have 26.5 W/ft2 of consumption so 80-85% of that needs to go directly on the meter just like exterior lights would with the same kitchen schedule. Same goes for the natural gas. 

Hope that makes sense. 

Fred


FRED BETZ  PhD,  LEED® AP BD+C
BUILDING PERFORMANCE

AEI | AFFILIATED ENGINEERS, INC.  
5802 Research Park Boulevard | Madison, WI  53719

P: 608.236.1175 | F: 608.238.2614  
fbetz at aeieng.com  |  www.aeieng.com  
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-----Original Message-----
From: Paul Diglio <paul.diglio at sbcglobal.net> 
Sent: Tuesday, December 18, 2018 8:51 AM
To: Paul Diglio <paul.diglio at sbcglobal.net>; Jing Hong <hongjing.shirley at gmail.com>
Cc: equest-users at lists.onebuilding.org; equest-users at onebuilding.org; equestuser00 at gmail.com
Subject: Re: [Equest-users] Equipment Load

Hi Jing:

Yes, as long as you have documentation to back up your estimate, I would use 20% of the electrical and gas energy as being rejected in the space.  The tables look good to me.  I don't know what your schedule looks like. Attached is the COMnet schedules that are usually accepted by the rating authorities.

Paul Diglio
87 Fairmont Avenue 
New Haven, CT  06513 



--------------------------------------------
On Tue, 12/18/18, Jing Hong <hongjing.shirley at gmail.com> wrote:

 Subject: Re: [Equest-users] Equipment Load
 To: "Paul Diglio" <paul.diglio at sbcglobal.net>
 Cc: equest-users at lists.onebuilding.org, equest-users at onebuilding.org, equestuser00 at gmail.com
 Date: Tuesday, December 18, 2018, 9:29 AM
 
 Hi
 Paul,
 For our cases, we
 estimated 80-ish% of the heat will go right up to the
 exhaust hood. So should I fill the equipment and internal
 energy energy sources with the number before the 80%
 reduction or after? For example, I have 10 W/sqft
 electricity cookers and 100,000 Btu/hr gas cookers in the
 kitchen, do I fill the tables below correctly?
 
 
 On Tue, Dec
 18, 2018 at 6:38 AM Paul Diglio <paul.diglio at sbcglobal.net>
 wrote:
 Jing:
 
 
 
 Usually there is an exhaust hood with makeup air in the
 kitchen.  If this is true, then you need to estimate how
 much heat is actually transmitted to the space compared to
 how much heat is expelled through the hood.  This should
 lower your cooling load.
 
 
 
 Paul Diglio
 
 87 Fairmont Avenue 
 
 New Haven, CT  06513 
 
 
 
 
 
 --------------------------------------------
 
 On Mon, 12/17/18, Jing Hong via Equest-users <equest-users at lists.onebuilding.org>
 wrote:
 
 
 
  Subject: [Equest-users] Equipment Load
 
  To: equest-users at lists.onebuilding.org,
 equest-users at onebuilding.org,
 equestuser00 at gmail.com
 
  Date: Monday, December 17, 2018, 7:37 PM
 
 
 
  Dear
 
  All,
 
  I have a question regarding
 
  the internal load.
 
  Under the Equipment tab of
 
  the internal load, there are two tables. One is
 Equipment
 
  and another is Internal Energy Sources. For my project
 with
 
  a kitchen serving 5 hours daily, how to input
 the power?
 
  For example, based on the specification sheets, we
 have
 
  26.5 W/sqft input power density for electricity, and
 
  474,000 Btu/hr for gas equipment. However, it will make
 the
 
  cooling load so huge for cooling
 
  systems. Does anyone know
 
  how eQuest convert energy input to cooling load? Did I
 fill
 
  the tables right?
 
 
 
 
 
 
 
  Thank
 you!Jing_______________________________________________
 
  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
 
 
 
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