[Equest-users] (no subject)

[Nick Caton]

In response to Chen's original queries:

 

1.       It's up to the modeler (you) to review and determine the
appropriateness of defaults used.  I have found default inputs provided
by eQuest and the libraries for items like material properties
(mass/conductivity), space-dependent occupancies and plug loads, and so
forth are sensible and appropriate for general use, but I have to stress
that caveat.   I don't think anyone can holistically state that any
given default is appropriate for every situation.  The effects of any
given input for a particular project are most easily explored on your
own ;).

2.       In your example, if you only define 17775 ft2 of space for your
footprint, then that is all you are modeling.  If there is a good reason
for the large discrepancy, you may be able to proceed and explain the
reasons in your submitted documentation later, but it would probably be
easiest to incorporate the missing areas into your model to avoid that
line of questioning altogether.

3.       I stopped artificially inflating/adjusting process loads to 25%
some time ago.  There is much discussion on this topic in the archives
(notably, {bldg-rate}) if you wish to know all the reasons, but in brief
you are much better off using a specific plug load density (watts/ft2)
and defining any other process loads independently (elevator equipment,
kitchen loads, etc.).  I understand the 90.1 Users Manual to be commonly
cited for space-appropriate plug load densities and scheduling.  I have
found referencing a known standard like the Users Manual for plug loads
and providing a brief description of how non-plug-load process loads are
being handled is generally sufficient for LEED documentation.  Not too
difficult.

 

I caution anyone presently relying on the 25% "option/suggestion" to
consider: one can end up between a rock and a hard place where select
proposed equipment will not be of sufficient capacity to handle the
arbitrarily inflated internal loads, resulting in unmet hours that
cannot be resolved in a straightforward fashion.

 

~Nick

 

 

 

NICK CATON, P.E.

SENIOR ENGINEER

 

Smith & Boucher Engineers

25501 west valley parkway, suite 200

olathe, ks 66061

direct 913.344.0036

fax 913.345.0617

www.smithboucher.com 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Bosch,
Crina
Sent: Monday, November 28, 2011 7:53 AM
To: 'Oscar B.'; kehuang.chen at siemens.com
Cc: eQuest Users
Subject: Re: [Equest-users] (no subject)

 

Chen, 

 

My understanding about the process energy is that you need to have the
proposed values.  If your process energy does not equal 25% of your
total energy than I usually give an explanation why I don't have so much
process load. The reviewer wants to make sure that you took into account
all your process load (refrigeration, cooking equipment, elevator, etc.
) 

 

The difference between areas I don't usually find that in e-Quest but
Hap program will have that because of the load calculations that does
not include the interior cavity wall of spaces.  If your model is in
e-Quest, than I will investigate more and talk to the architect. 

 

I hope this helps. 

 

Crina Bosch
Designer, Sustainability

karpinski
ENGINEERING
3135 Euclid Avenue
Cleveland, OH  44115
P  216.391.3700 ext 3087
F  216.391.0108
E  cbosch at karpinskieng.com
W www.karpinskieng.com

 

 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Oscar
B.
Sent: Monday, November 28, 2011 8:45 AM
To: kehuang.chen at siemens.com
Cc: eQuest Users
Subject: [Equest-users] (no subject)

 

 

 Hello Chen

I'm not an expert on eQuest but i know that proses loads must be at
least 25% of the cost of total energy consumption unless you have
documentation to support the opposite. You have to increase
miscellaneous loads until you get at least  25% .

I hope that helps

Regads




 


On 26/11/2011 10:09 p.m., Chen, Ke-Huang wrote: 

Hi all,

 

I am building a model for LEED project and I have some questions
confused me for a long time, does anybody know the answers or can give
me some suggestions?

 

1. All the property information I have is only a part of all the
information listed in eQUEST, if I can't find the information in
equipment spec., could I leave it in default value or I need to find out
anyway? If I leave it in default value, will it effect the result a lot?

 

2. The area is 19211 ft2 in document and I import the Building Area
19211 ft2 in wizard screen 1 of 25, but after I footprint the shape with
CAD file, there is an information "Dimensions Specified Above: 17775
ft2". Does it mean the area of this building now is 17775 ft2 not 19211
ft2? Will it be accepted if the building area is not the same as the
document?

 

3. The reference guide shows the process energy should be at least 25%
of all energy cost. If the process energy is less than 25% after I
finish building the model, how could I increase the process energy to
25%?

 

 

Thanks for any help.

 

 

 

 

KeHuang Chen

System Engineer

IC BT Division

Siemens Limited Taiwan

 

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

Mobile : (+886)960548011

Fax : (+886)2-2652-8824

 





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