[EnergyPlus_Support] Re: Temperatures setpoints - dual setpoint w/ deadband

["cmsoliveira2004" <cmsoliveira@xxxxxxx>]

First of all, thank you very much for your reply.

Ok, now to the answer provided... when i choose the dual setpoints w/
deadband, mean that the normal behaviour is for zone temperature varie
between the setpoints i've defined, and not stay exactly at those
temperatures. Is that correct?

My though was that the temperature would be "locked" at the defined
temperatures.

Another question, when i start a simulation, does energyplus take any
initial thermal accumulation in the mass into account? If not, would
the results be affected in a significant way?

Thnx again for the answers.


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
<mjwitte@g...> wrote:
> For completeness, I am repeating my reply on both message threads . . .
> 
> The system appears to be running properly.  I ran the simulation for
one week 
> in January and one week in July and the zone temperatures are always
within the 
> range of heating setpoint to cooling setpoint.  The "Dual Setpoint with 
> Deaband" control option means that heating is provided up to the
heating 
> setpoint, cooling is provided down to the cooling setpoint, or the zone 
> temperature is floating in the deadband between the two setpoints.  The 
> schedules in this input file specify heating setpoints of 21C
(occupied) or 17C 
> (unoccupied) and cooling setpoints of 24C (occupied) or 28C
(unoccupied).  This 
> type of control will automatically switch between heating and
cooling as 
> needed.  (Hint:  To report the values of a schedule use "Report
Variable, *, 
> Schedule Value, hourly;")
> 
> Mike
> 
> 
> On 30 Nov 2004, at 18:13, cmsoliveira2004 wrote:
> 
> > 
> > 
> > Hi, all
> > 
> > this post is, somewhat, the continuation of "Temperature error in
> > eplus results".
> > 
> > My question is, what factors may influence the setpoints i've defined?
> > 
> > I've tried to do some tests changings some values, redefining
> > schedules, new temperatures, etc, and every time i run the simulation
> > the report "Zone/sys Air temp" is always the same, i.e, the zone
> > temperatures are not what i've specified.
> > 
> > Unless i misunderstanding the concept of dualsetpoints with deadband,i
> > believe, it's used when i want 2 different temperatures in the same
> > day (i.e, 21ºC when occupied and 17 when unoccupied - this is for
> > winter, having other temperatures in the summer) - using a control
> > type: 4.
> > 
> > Don't know if it helps but i've got to warnigs after the simulation is
> > done, which are the following:
> > 
> > ** Warning ** Invalid Data Found on Weather Data File
> > ************* Invalid Weather Codes, Number of items=   43
> > ** Warning ** Invalid Data Found on Weather Data File
> > ************* Invalid Weather Codes, Number of items=    6
> > 
> > The weather file i'm using is for Lisbon.
> > 
> > The simulation i'm doing is for a validation test of energyplus, but
> > without having this problem sorted out, i'm stuck...unless that's the
> > program normal behaviour (which i doubt it).
> > 
> > I've uploaded the file projecto 16.zip, in case it's necessary.
> > 
> > Any help would be apprecciated.
> > 
> > Thnx for reading
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > The primary EnergyPlus web site is found at:
> > http://www.energyplus.gov
> > 
> > The group web site is:
> > http://groups.yahoo.com/group/EnergyPlus_Support/
> > 
> > Attachments are not allowed -- please post any files to the
appropriate folder
> > in the Files area of the Support Web Site.
> > 
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> > 
> 
> 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support      
> EnergyPlus-Support@g...





------------------------ Yahoo! Groups Sponsor --------------------~--> 
$9.95 domain names from Yahoo!. Register anything.
http://us.click.yahoo.com/J8kdrA/y20IAA/yQLSAA/dkFolB/TM
--------------------------------------------------------------------~-> 

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/