Re: [EnergyPlus_Support] Re: Temp can't meet setpoint

["Michael J. Witte" <mjwitte@xxxxxxxx>]

This run is fully autosized using two design days.  The cooling design day has 
a day type of "SummerDesignDay" which is appropriate.  But the thermostat 
cooling setpoint for the SummerDesignDay day type is 30.1C (Cooling_Setpoint_WE 
day schedule).  This causes the equipment to be sized to meet 30.1C.  Change 
the setpoint schedules to use the weekday values for SummerDesignDay and 
WinterDesignDay day types.

Mike


On 24 Jan 2005, at 12:18, hbn_pch wrote:

> 
> 
> Hi Mike,
>   I check the temp,and find the although the supply airtemp can meet 
> the setpoint,the zone temp can't meet setpoint yet.And i found that 
> if i change the groundtemperature object values,then the zone temp 
> can meet the setpoint.I'am puzzled.For a long time,i add the 
> groundtemperature object with its default values(18).I look the i/o 
> reference,it told me that the values in this object is calculated by 
> slab.exe.Is it said that when we create a model,we should calculate 
> the groundtemperature at first?If yes,when we use slab.exe to 
> calculate the temp,we should create the idf.But there is much more 
> variables to define and some is unknown to me.How can l deal with?
>   thanks a lot.
> 
>   pch 
> 
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
> <mjwitte@g...> wrote:
> > If the supply air temperature is not meeting setpoint, then the 
> coil is too 
> > small or the chilled water supply is too warm.  Is the chilled 
> water supply 
> > loop meeting its setpoint?
> > 
> > Mike
> > 
> > 
> > On 20 Jan 2005, at 11:56, hbn_pch wrote:
> > 
> > > 
> > > 
> > > Hi,
> > >   I run a simulation and find that the zone temp can't meet 
> setpoint.
> > > I check the zone inlet node temp and vav outlet node temp.I find 
> when 
> > > heating,the vav outlet node meet the supply air setpoint(16) and 
> the 
> > > zone inlet node temp rise more during controlled period(53-
> > > 56).Howerer,the zone temp can't meet setpoint(20).when 
> cooling,the 
> > > vav outlet node(14-15) can't meet the the supply air setpoint(12) 
> and 
> > > the zone temp can't meet the setpoint too.
> > >   How can 1 adjust it?I'v upload the idf(pch-03.idf).
> > >   Thanks for your help.
> > > 
> > >  pch
> > > 
> > > 
> > > 
> > > 
> > > 
> > > 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...
> 
> 
> 
> 
> 
> 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
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> 
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> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx




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