[Equest-users] Medical equipments

Chen, Ke-Huang kehuang.chen at siemens.com
Wed Oct 26 03:50:54 PDT 2011


Dear eQUEST users,
 
Many thanks for your kindly help.
 
I am still finding how 60% occurs.
Below is the medical equipment list and the main equipments are 3 floors
high proton beam therapy, does anyone have any idea how to model these
medical equipments?
I put the power density of elevator and medical equipments in Process
Loads and Profiles page like below, but I am not sure if I did it
correct.
 
 
 
Best regards,
 
 
 
KeHuang Chen
System Engineer
ICBT Division
Siemens Limited Taiwan
 
Tel : (+886)2-2652-8888 ext. 896
Mobile : (+886)960548011
Fax : (+886)2-2652-8824
 
  
 
 
 
 
 
 

________________________________

From: Emtman, Brian [mailto:emtman at coffman.com] 
Sent: Wednesday, October 26, 2011 7:12 AM
To: Fred Betz; Bruce Easterbrook; Chen, Ke-Huang
Cc: equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Medical equipments



Expanding on what Bruce said, consider that equipment nameplate electric
values tend to be substantially higher than in real life. If you are
currently using nameplate equipment values as the basis for your Watts /
sf model inputs, it could be unrealistically increasing both the
electric energy consumption of the equipment itself and the energy
required to condition the space. 

 

FYI, if you have an ASHRAE 2009 Fundamentals Handbook, check out Tables
6 and 7 on pages F18.11 for nameplate and recommended heat gain rates
from typical medical equipment (or see attached). You're probably not
modeling each individual blanket warmer (I hope!) but it gives you an
idea of how substantially actual conditions can differ from nameplate. 

 

As Bruce also mentioned, make sure a utilization schedule is applied to
whatever peak value you come up with so that it is not running at 100%
all the time. It sounds from your email like you may already have a
schedule applied to prevent them from being "used" very often though... 

 

Brian

 

Brian Emtman, LEED AP BD+C
Mechanical Engineering

 

Coffman Engineers, Inc.

p 206.623.0717  | f 206.624.3775     www.coffman.com
<http://www.coffman.com/> 

LASTING creativity | results | relationships 
Please consider the environment before printing this email. 

 

________________________________

From: Fred Betz [mailto:fbetz at aeieng.com] 
Sent: Tuesday, October 25, 2011 6:25 AM
To: Bruce Easterbrook; Chen, Ke-Huang
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Medical equipments

 

Chen,

 

I do a lot of LEED modeling in health care. You should be seeing between
20% and 35% for the electrical process load. 

 

If you have a lot of large equipment; CT's, MRI's, etc. then you'll be
closer to the 35%. If you have a small clinic or medical office building
that shares equipment between locations, then you'll be closer to 20%. 

 

Another consideration is that your large equipment might be water
cooled. If that's the case, you should put about 10-15% of the electric
load in the space, and then 85-90% of the load as an external load
similar to exterior lights. Make sure to put an equivalent cooling load
on you chilled water loop as a process load. 

 

Hope that helps,

 

Fred

 

Fred Betz  PhD., LEED AP 
Sustainable Systems Analyst

 

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

P: 608.236.1175 | F: 608.238.2614  
fbetz at aeieng.com <mailto:fbetz at aeieng.com>   |  www.aeieng.com
<http://www.aeieng.com/>   

 

 

From: Bruce Easterbrook [mailto:bruce5 at bellnet.ca] 
Sent: Sunday, October 23, 2011 9:35 PM
To: Chen, Ke-Huang
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Medical equipments

 

Hi Chen,
  I don't do much medical work or LEED but the medical equipment should
be modelled like a process load and have it's own schedule you can
manipulate.  60% sounds like a lot.  With it's own schedule you can
change it to reflect its actual loads and locations in the building.
Process loads, like industrial loads don't effect LEED.  But they do
effect the sizing of your HVAC equipment.  So you do have to model them
realistically.  You could put them on their own sub meter as well.  This
might make separating from the LEED parts of your project simpler.  LEED
or not, your building has to work well.  That is your primary focus.
60% is a big effect, make sure it is realistic and make sure your
systems can handle it.
Bruce Easterbrook P.Eng.
Abode Engineering

On 23/10/2011 4:35 AM, Chen, Ke-Huang wrote: 

Dear eQUEST users,

 

I am trying to build a LEED Health Care model and have a question about
the electric of medical equipments. After I modeled the equipments, the
electric consumption of Misc. Equip. is about 60% of total electric but
the medical equipments are not used very frequently. Do I have to add
the medical equipments to the model or where can I plan a schedule for
the medical equipments? Did anyone have the experience of modeling a
LEED Health Care model? It's my first time building a Health Care model,
is there anything I need to look over ? Any suggestion will be
appreciated.

 

Best regards,

 

 

KeHuang Chen

System Engineer

IBT Division

Siemens Limited Taiwan

 

Tel : (+886)2-2652-8888 ext. 896

Mobile : (+886)960548011

Fax : (+886)2-2652-8824

 

 





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