[Equest-users] EQuest Photvoltaic Module

[Vikram Sami]

Kathryn et al,

I looked into this a little more and here's what I understand:

The PS-E meter reports the end use consumption on the customer side of
the meter. 

The BEPS Report reports end usage on the utility side of the meter. If
you have a generator (like a PV system) it prorates the electric
generation across all end uses, so this isn't an accurate representation
of the building energy usage. It's my understanding that this is why the
energy numbers in the results view come from the PS-E reports and not
the BEPU reports. 

 

So if you want to get the electricity generated by your PV system, you
should look up the PS-H  report for your array (not for the module).
Make sure you look under AC Output (not DC output) to get the
post-inverter output. 

 

Your BEPU total kWh should equal to your PS-E total - your PS-H AC total
for the PV Array. 

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 Vikram
Sami
Sent: Monday, August 10, 2009 2:41 PM
To: Kathryn Kerns; equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] EQuest Photvoltaic Module

 

Kathryn,

I think it depends on what reports you are looking at. I think eQUEST
reports the PV calculations after the plant calculations, so it will
show up in all your utility level reports (BEPS, BEPU, ES-D etc), but
not in your plant level reports (PS-F etc). So for instance when you
look at the eQUEST simulation results view, your parametric run reports
will show it in only a few limited places - the annual & monthly utility
bills, as well as the source energy in the building summary of the
parametric reports. 

 

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 Kathryn
Kerns
Sent: Monday, August 10, 2009 1:52 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] EQuest Photvoltaic Module

 

Has anyone successfully inserted a photovoltaic array into an eQuest
energy model? I found an example in the Dictionary, created a
photovoltaic module and an inverter and attached it to the EM1 utility
meter. However, the model's total energy consumption did not change with
this model addition. Since the model uses a Hawaii weather file, I am
thinking that there should be some reduction in energy consumption. I
have attached the inputs I used and the warning message I got from the
output file. Can anyone figure out what I am doing wrong? Thanks.

 

 

 

Kathryn Kerns

Systems Specialist

BCE Engineers, Inc.

| Ph: 253.922.0446 | Fx: 253.922.0896 | 

 

 

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