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RE: [EnergyPlus_Support] Confusion about Eplus output.
The air system loads table only applies to air systems with air loops.
The electric baseboard heater is zone equipment and therefore there is
no air loop -- so the air system loads come out zero. Since your
thermostat is only single heating setpoint, the zone temps are floating
when there is no heating load --- again the air system sees no cooling
load. You should (probably) use dual setpoint with deadband rather than
single setpoint.
________________________________
From: EnergyPlus_Support@xxxxxxxxxxxxxxx
[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Albert Sitorus
Sent: Wednesday, February 21, 2007 9:29 AM
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
Subject: RE: [EnergyPlus_Support] Confusion about Eplus output.
Brent,
Thank you for your reply. I tried and it worked.
With respect to overall hvac air system loads table, after I made
changes to
the people and interior lighting input overall hvac air system loads
table
changed significantly. The months of Nov, Dec, Jan, and Feb are now zero
for
air loop total heating and cooling energies. The system has no reheat
and
uses electric baseboard (BASEBOARD HEATER:ELECTRIC:CONVECTIVE) as
heating
source. The system uses EVAPCOOLER:DIRECT:CELDEKPAD with
FAN:SIMPLE:CONSTVOLUME. The system uses ZONE CONTROL:THERMOSTATIC as its
control system with only single heating setpoint. The zone has quite a
big
load which consists of electric equipment, interior lighting and people.
For
Electric equip., its design is 569W. Interior lighting is 761.5W. The
number
of max number of people is 2.
I can upload the file if you want to see it. I am not sure if the way I
set
up this file is correct or not.
Again, thank you for your time and help. I appreciate them greatly.
Sincerely,
Albert Sitorus.
>From: "Griffith, Brent" <brent_griffith@xxxxxxxx
<mailto:brent_griffith%40nrel.gov> >
>Reply-To: EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com>
>To: <EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com> >
>Subject: RE: [EnergyPlus_Support] Confusion about Eplus output.
>Date: Fri, 16 Feb 2007 13:26:54 -0700
>
>Sorry about the confusion. If you added people objects with unique
>names that don't match the names of the zones, then you will get the
>behavior you describe below. The table reports in files from the
>example file generator are using a bit of trick where zone names and
>people names are set to be the same. It has to do with the "keys" used
>to create the table reports. The "trick" is used to get Fanger PMV
>(key'd off of people names) and zone conditions (key'd off of zone
>names) into the same report table. (Another explanation is that in
>older versions of E+ the people objects didn't have names so it didn't
>matter). If you don't care about the Fanger PMV number, then such a
>report table could use the report variable called Zone People Number of
>Occupants instead of People Number of Occupants.
>
>
>
>It is difficult to say why you are having problems with heating energy
>without knowing more about the system. But a building can be cooled all
>year with heating energy used for mainly for reheat. You can see this
>behavior if supply air deck temperatures are being reset warmer in the
>winter.
>
>
>
>
>
>
>
>________________________________
>
>From: EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com>
>[mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com> ] On Behalf Of lbrtstrs
>Sent: Friday, February 16, 2007 11:46 AM
>To: EnergyPlus_Support@xxxxxxxxxxxxxxx
<mailto:EnergyPlus_Support%40yahoogroups.com>
>Subject: [EnergyPlus_Support] Confusion about Eplus output.
>
>
>
>Hi all,
>
>I have a couple of questions regarding Eplus output. I ran an
>example file that is called 1zoneEvapCooler. I added interior and
>extrior lightings, electric equipments and people. I also added
>schedules as needed. I run this file using weather file and design
>days. I also added predefined table reports. I also received and run
>idf files from example file generator to make sure that I installed
>Eplus correctly. When I review the outputs, there are several things
>that I don't understand.
>
>First, in occupant data summary table there are missing units. This
>file only have 1 zone but I received two occupant data summary
>tables for the same zone. Both tables have missing units. When I
>check in the idf file, I only put one command that would produce
>this table. What happens here? I compare the command for the
>predefined table to the idf file from sample file generator and they
>look the same. But in the output table for generated idf file the
>table is complete.
>My second question is about overall hvac air system loads table. The
>heating energy useages in the months of summer are higher than in
>the winter months. This is quite stanger for me. What triggers this?
>Am I missing something here?
>
>Thank you for your time and help. I appreciate them greatly.
>
>Sincerely,
>
>Albert Sitorus.
>
>
>
>
>
>[Non-text portions of this message have been removed]
>
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