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[EnergyPlus_Support] Re: load problem
Thanks for your suggestion.I test and find the infiltration heat
gain&heat loss is zero.I checked the infiltration schedule and the
coefficients.i used the coefficients (0,0,0.2237,0)in examples.Then i
changed to(1,0,0,0) as default for energyplus,then the infiltration
heat gain&loss become non-zero.What caused this change?
Otherwise,if i use a full system,such as vav system,how to get the
outside air load?Which variable should i define?
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
> What you have done should be working. The outside air option in
> is only useful for a peak load calculation, otherwise for what you
> INFILTRATION is the best approach to add an outside air load. The
> air cooling load should increase when there is additional heat gain
> by infiltration.
> Turn on the report variables for infiltration heat gain and heat
> determine where the problem is. If these are zero during the
> then check the schedule and the coefficients on the infiltration
> When modeling a full system, such as a VAV system, then outside air
> introduced through an outside air system component with a mixing
> outside air controller (see 5ZoneAuto.idf example file, and others).
> On 23 Aug 2005, at 11:16, eplus2005 wrote:
> > Dear all,
> > I want to gain the load of building model.I divided the
> > load to three parts as follows:
> > 1.load produced by outside environment;
> > 2.load produced by space gains(people,lights,electric
> > 3.load produeed by outside air.
> > According to the load parts,i created three models.The first
> > has only building informationg.The second adds the space gains
> > the third adds the outside air.
> > But i found that whether or not add outside air,the cooling
> > did't change,it just adds the heating load.(Why?)
> > All cases use the purchased air.Otherwise,i'm puzzled for the
> > produced by outside air.i don't know where to define the outside
> > air,so i use the infiltration instead(Is it reasonable?).In Each
> > case,I use the variable values Purchased Air Cooling Rate as load
> > values(is it reasonable?)
> > If i don't want to use infiltration or ventilation,then how
> > get the load produced by outside air and how to define?If i use a
> > real system(e.g VAV),how should i define the outside air volume
> > get the load it produced?
> > Thanks in advance!
> > 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
> > in the Files area of the Support Web Site.
> > Yahoo! Groups Links
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support
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