[Equest-users] Data Entry

[Lars Fetzek]

Vikram,
 
    In answer to your question - in the "space properties" section, it asks
for illuminance (footcandles), ceiling-to-luminary distance (feet), and
workplane height (feet).  In the "lighting systems" section, it asks for
total lamp lumens and for the coefficient of utilization.
    That having been said, B. Fountain has kindly addressed my question.
The upshot is that the photometric data is not necessary or relevant if use
the "luminaire count" lighting data input method in the "space properties"
section and have properly defined the electrical power used by each lighting
system.  The photometric data is relevant only if I intend eQuest to
calculate the quantity of fixtures necessary to enforce a certain level of
illumination.
    As for your advising me to right-click for help -  thanks very much!
Previously, I went to "help" through the menu system, which gives me just
about nothing.
 
Lars Fetzek, EI
Phoenix Engineering Group
Tampa, Florida

  _____  

From: Vikram Sami [mailto:VSami at lasarchitect.com] 
Sent: Thursday, August 06, 2009 5:18 PM
To: Lars Fetzek; equest-users at lists.onebuilding.org
Subject: RE: [Equest-users] Data Entry



Lars,

 

I'm intrigued by this - I've never had to input photometric data. What
exactly was it asking you for?

 

With regards to your second question, you typically specify only one (either
cfm/person or cfm.ft2 or total cfm).  If you have issues with any of these
commands try right clicking and going to either topic help, or item help for
more specific help. eQUEST has pretty good help files.  For instance when
you go to item help under the Outside airflow, you get the text below:

 

OUTSIDE-AIR-FLOW

The minimum flow rate of outside ventilation air for the zone.
Alternatively, or additionally, outside air flow rate may be specified by
the keywords OA-FLOW/PER and OA-CHANGES (or by SYSTEM:MIN-OUTSIDE-AIR). The
program calculates outside air flow rate based on each entry and normally
uses the larger value except if it sees data entry for OUTSIDE-AIR-FLOW,
which overrides other values. Note that specifying outside ventilation air
at the zone level takes precedence over specifying it at the system level.
Although the specified quantities may be modified by the program for the
sake of consistency, the flow of outside ventilation air is an uninterrupted
flow as long as the fans are operating. The outside ventilation air quantity
is not determined by the design space heating or cooling demands except when
an economizer is specified. Use either OUTSIDE-AIR-FLOW or OA-FLOW/PER or
OA-CHANGES.

Hope this helps

 

 

Vikram Sami, LEED AP 
Direct Phone 404-253-1466 | Direct Fax 404-253-1366 

LORD, AECK & SARGENT ARCHITECTURE



 

From: equest-users-bounces at lists.onebuilding.org
[mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Lars Fetzek
Sent: Thursday, August 06, 2009 3:47 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Data Entry

 

Fellow eQuesters,

 

    I'm sorry to continue posting such basic questions, but I am, as usual,
lost.

    It seems that entering data for lighting and for HVAC (in the detailed
model) involves hundreds of fields, many of which really don't seem
relevant.  For example, the lighting fields include many questions about
photometrics.  However, obviously, if I have a lighting time schedule and
the lighting systems defined, I should be able, using simple arithmetic, to
calculate how much energy it uses.  However, eQuest wants a bunch of other
information (such as photometrics), which has taken me forever to calculate.
However, I dare not omit such data since I don't know what eQuest's
algorithms are.

    I am just starting to model the HVAC systems and things appear even
worse.  I don't need eQuest to design the systems for me.  The systems exist
on paper.  How do I eliminate all of the irrelevant fields and just enter
the important stuff that actually describes my systems?  I am especially
perplexed when there are three fields asking for A, B, and the ratio of A to
B.  Why doesn't it just ask for two rather than all three such data?  What
if a user enters conflicting data, such as A=2, B=3, and A/B=7?  Again, it
is alot like the lighting:  I don't care about CFM/person or CFM/sq-ft.  I
have the CFM, the number of people, and the square feet for a zone.  How can
avoid the hundreds of questions?

    Any ideas?  How can I tell what fields eQuest will actually use in doing
the energy modeling so that I can ignore the rest?

 

Lars Fetzek, EI

Phoenix Engineering Group

Tampa, Florida

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