Re: [EnergyPlus_Support] Re: Internal Gains - High Consumption Equipment - Simulate

[Jeremiah Crossett <jcrossett@xxxxxxxxxxxxxxx>]

Possibly you could set the fraction lost to a high number and the fraction radiant to a low number. This would cause the internal equipment to have a consumption load but would heat the zone less. Curios, what type of equipment is this high W/m2?

Jeremiah D. Crossett  | Senior Analyst  |  Phase Change Energy Solutions

120 E. Pritchard St.  | Asheboro, NC 27203  | Mobile 503-688-8951

www.phasechange.com 

  

On Wed, Apr 24, 2013 at 7:56 AM, phidalgosandoval <phidalgosandoval@xxxxxxxxx> wrote:

 

Jim,

in this case should be interior, but Jean suggestion is appropiate anyway.

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Jim Dirkes <jim@...> wrote:
>

> How about defining this load as external equipment? (or if you are using DB, update to the most recent Beta as Jean suggests)
>
> James V Dirkes II, PE, BEMP, LEED AP

> www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
> Energy Analysis, Commissioning & Training Services
> 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> 616 450 8653
>
> From: EnergyPlus_Support@xxxxxxxxxxxxxxx [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of phidalgosandoval

> Sent: Wednesday, April 24, 2013 10:51 AM
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Subject: [EnergyPlus_Support] Re: Internal Gains - High Consumption Equipment - Simulate
>
>
>
> Actually if I don´t condition that space probable people will be cook and sterilized, instead of instruments.
>
> Thanks again.
>

> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com>, Jim Dirkes <jim@<mailto:jim@>> wrote:
> >

> > Why is there no conditioning with such high internal loads? You could probably cook something in that room!
> >
> > James V Dirkes II, PE, BEMP, LEED AP
> > www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
> > Energy Analysis, Commissioning & Training Services
> > 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> > 616 450 8653
> >

> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com>] On Behalf Of phidalgosandoval

> > Sent: Wednesday, April 24, 2013 10:46 AM

> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com>
> > Subject: [EnergyPlus_Support] Re: Internal Gains - High Consumption Equipment - Simulate
> >
> >
> >

> > Thanks Jim I will try conditioning the space to see what happens.
> >

> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com>, Jim Dirkes <jim@<mailto:jim@>> wrote:
> > >
> > > I think the problem is that you are not conditioning that zone and the high internal heat is causing a surface temperature to become incorrect. It does not make sense that the surface temperature is too low, but perhaps if you condition the zone, the problem will be resolved?
> > >
> > > James V Dirkes II, PE, BEMP, LEED AP
> > > www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
> > > Energy Analysis, Commissioning & Training Services
> > > 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> > > 616 450 8653
> > >

> > > From: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com>] On Behalf Of phidalgosandoval

> > > Sent: Wednesday, April 24, 2013 10:33 AM

> > > To: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com>

> > > Subject: [EnergyPlus_Support] Re: Internal Gains - High Consumption Equipment - Simulate
> > >
> > >
> > >
> > > Ok, Jim,
> > >
> > > thanks for the extremely fast reply, more information is added here:
> > >
> > > ** Severe ** Temperature (low) out of bounds [-518.20] for zone="8PAV:ESTERILIZACAORAPIDA", for surface="8PAV:ESTERILIZACAORAPIDA_PARTITION_5_0_11363"
> > >
> > > ** ~~~ ** During Warmup & Sizing, Environment=SUMMER DESIGN DAY IN SAO PAULO, at Simulation time=01/15 20:00 - 20:01
> > >
> > > ** ~~~ ** Zone="8PAV:ESTERILIZACAORAPIDA", Diagnostic Details:
> > > ** ~~~ ** ...Internal Heat Gain [4006.000] W/m2
> > > ** ~~~ ** ...Infiltration/Ventilation [4.447E-003] m3/s
> > > ** ~~~ ** ...Mixing/Cross Mixing [0.000] m3/s
> > > ** ~~~ ** ...Zone is not part of HVAC controlled system.
> > >
> > > ** Fatal ** CalcHeatBalanceInsideSurf: Program terminates due to preceding conditions.
> > >
> > > ...Summary of Errors that led to program termination:
> > >
> > > ..... Reference severe error count=1
> > >
> > > ..... Last severe error=Temperature (low) out of bounds [-518.20] for zone="8PAV:ESTERILIZACAORAPIDA", for surface="8PAV:ESTERILIZACAORAPIDA_PARTITION_5_0_11363"
> > >
> > > ************* Warning: Node connection errors not checked - most system input has not been read (see previous warning).
> > >
> > > ************* Fatal error -- final processing. Program exited before simulations began. See previous error messages.
> > >
> > > ----------------------------------------------------------
> > > Is the "6" of the 4006 W/m2 maybe the problem? should I indicate 3999 W/m2 for example?
> > >
> > > Any detective hunch?
> > >
> > > thanks.
> > >
> > > PH
> > >

> > > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com>, Jim Dirkes <jim@<mailto:jim@>> wrote:
> > > >
> > > > Pablo,
> > > > I don't think you have provided enough information.
> > > > What error is caused at 4000 w/m2?
> > > > There should be no problem caused by the value 2000 or 4000, so I think the problem is something else.
> > > >
> > > > James V Dirkes II, PE, BEMP, LEED AP
> > > > www.buildingperformanceteam.com<http://www.buildingperformanceteam.com/>
> > > > Energy Analysis, Commissioning & Training Services
> > > > 1631 Acacia Drive, Grand Rapids, MI 49504 USA
> > > > 616 450 8653
> > > >

> > > > From: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com> [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com>] On Behalf Of phidalgosandoval

> > > > Sent: Wednesday, April 24, 2013 10:26 AM

> > > > To: EnergyPlus_Support@xxxxxxxxxxxxxxx<mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com><mailto:EnergyPlus_Support%40yahoogroups.com>

> > > > Subject: [EnergyPlus_Support] Internal Gains - High Consumption Equipment - Simulate
> > > >
> > > >
> > > >
> > > > Dear all
> > > >
> > > > For a high consumption equipment we have 4000 w/m2 and Eplus does not simulate because of the high internal gains, but inputting 2000 w/m2 simulate with no problem (both cases with 20°C as cooling setpoint).
> > > >
> > > > Does anyone knows how to simulate properly in this case?
> > > >
> > > > Any comments are welcome,
> > > >
> > > > Thanks in advance,
> > > >
> > > > Pablo
> > > >
> > >
> >
>

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