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[EnergyPlus_Support] Re: infiltration
Hi Thodwris,
The units of m3/h seem like an odd set of units. Just curious, was this from a blower-door test at a specific pressure difference?
My initial thought would be to divide m3/h by m3 (the volume of the building) and apply that 1/h value to each thermal zone. This isn't physically realistic though, as infiltration isn't applied evenly to each zone. It's a factor of the mechanical operation and weather, as stated by another person.
Lisa Ng
NIST - IAQ & Ventilation Group
lisa.ng@xxxxxxxx
--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Thodwris Xaritidis <maki_to_fai@...> wrote:
>
> Hi Oscar,
>
> I will use the design infiltration option but my question is :
> how am I going to apply this value to the building?
> I have 5 thermal zones all with windows attached. I know that 133m3/h refers to the whole building.
>
> Do I have to break (or divide) this 133 m3/h value for each zone (  n=q/v by getting the 5 zone volumes , for example V1= 50m2, n =133/50 ...etc )
>
> thank you
>
>
>
> ________________________________
> From: oscar hernandez <oscarhernandez_81@...>
> To: energyplus_support@xxxxxxxxxxxxxxx
> Sent: Tuesday, 5 June 2012, 11:06
> Subject: RE: [EnergyPlus_Support] infiltration
>
>
> Â
> Hi Teo,
>
> The infiltrations values on a building depend on orientation (wind direction). If you have a value of 133 m³/h, for me, the best solution it's to simulate the buliding only with this value of infiltration (design infiltration), after you are going to have the infiltration value per wall (N, S, E ,W) with this you can calculate an infiltration surface for the airflownetwork.
>
> Let me know if you need help!
>
> Oscar.
>
>
>
> ________________________________
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> From: maki_to_fai@...
> Date: Mon, 4 Jun 2012 17:08:14 +0100
> Subject: Re: [EnergyPlus_Support] infiltration
>
> Â
>
>
> Thank you for the answer on that.
>
>
> As far as the infiltration is concerned,
> I am given a value of 133 m3/h and I guess that this value concerns the whole building.
> How can I use this value for each thermal zone? Do I have to find out the volume of
>
> each thermal zone and solve the n=q/v (ach) equation for each thermal zone?
>
>
>
> thank you,
> theo
>
>
>
>
>
>
>
> ________________________________
> From: Thodwris Xaritidis <maki_to_fai@...>
> To: "EnergyPlus_Support@xxxxxxxxxxxxxxx" <EnergyPlus_Support@xxxxxxxxxxxxxxx>
> Sent: Sunday, 3 June 2012, 14:15
> Subject: Re: [EnergyPlus_Support] infiltration-nat. ventilation
>
>
> Hello again,
>
> In the building that I am simulating I ve been given a value
>
> for infiltration and one for nat vent for the whole building.
> Is there any option to e+ to apply the total infiltration/ vent. portion automatically in the whole construction?
> Or else how can I be sure which are the correct values for each zone?
>
> thank you
>
>
>
>
> ________________________________
> From: FrancescoP <direzionecontraria@...>
> To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> Sent: Sunday, 3 June 2012, 10:43
> Subject: [EnergyPlus_Support] Re: GetSpecificHeatGlycol: Temperature is out of range
>
>
> Â
> I have the same problem:
>
> sometimes the temperature is too low
>
> ************* ** Warning ** GetSpecificHeatGlycol: Temperature out of range (too low) for fluid specific heat
> ************* ** ~~~ ** This error occurred 58225 total times;
> ************* ** ~~~ ** during Warmup 0 times;
> ************* ** ~~~ ** during Sizing 0 times.
> ************* ** ~~~ ** Max=-9.894200E-003 {C} Min=-11.665963 {C}
>
> and sometimes (actually, a lot of times...) it is too high
>
> ************* ** Warning ** GetSpecificHeatGlycol: Temperature out of range (too high) for fluid specific heat
> ************* ** ~~~ ** This error occurred 3949461 total times;
> ************* ** ~~~ ** during Warmup 0 times;
> ************* ** ~~~ ** during Sizing 0 times.
> ************* ** ~~~ ** Max=277.409112 {C} Min=125.000118 {C}
>
> Any suggestion?
> Best Regards
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Omar Tabuyo <omartabuyo@> wrote:
> >
> > Dear all,
> >
> > Anyone knows how i could solve this warnning? I have checked all system nodes temperature and there is not any node which temperature is upper 85ºC
> >
> > Â Â ** Warning ** GetSpecificHeatGlycol: Temperature is out of range (too high) for fluid specific heat **
> > Â Â ** Â ~~~ Â ** ..Called From:UpdateSolarCollector Fluid name =WATER,Temperature=129.79
> > Â Â ** Â ~~~ Â ** Â Environment=RUN PERIOD, at Simulation time=01/06 12:15 - 12:30
> >
> > Do this warnning modify the simulation results?Â
> >
> > What is the warnning meaning?
> >
> > Thanks
> >
>
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