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[EnergyPlus_Support] Re: Confusion about Eplus output.
Dear Brent and Albert,
i simulated this example file too. There are 2 warnings.
i increased to the number of warm up days to 1000 to solve the first
convergence problem in the second warning due to high thermal mass
that appeared in the .err file but this problem still persist
Waiting for your esteemed comments
ooi
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Griffith, Brent"
<brent_griffith@...> wrote:
>
> 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@...
> <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]
> >
>
> __________________________________________________________
> http://homepage.msn.com/zune?icid=hmetagline
> <http://homepage.msn.com/zune?icid=hmetagline>
>
>
>
>
>
> [Non-text portions of this message have been removed]
>
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