Re: [EnergyPlus_Support] Re: Water Use Equipment as mister simulation

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

With a quick look at the input file, I do not any inputs for water temperatures 
in the WATER USE object.  I am not sure what the water use model will defaul 
to, but I would try this next.  Enter a fixed cold water temperature schedule 
and use the same schedule for the target temperature and the cold water supply 
temperature.  I would like to offer a general suggestion.  I see that your file 
is set up to run a full annual simulation.  It is much faster to run just 
design days (or a few selected weeks from the weather file, winter, summer, 
spring/fall) while working out basic issues like this.  Once the design days 
are behaving as you expect, then you can move on to a full annual simulation.

Mike


On 1 Feb 2008 at 13:27, bish.dj61 wrote:

> hi All
> Just a further update on this. I have tried all sorts of things to 
> get the latent heat gain to actually affect the temperature in the 
> zone of interest without success. I considered that the air 
> infiltration rate was too low so that once the humidity reached a 
> high value no more could evaporate, so the latent heat gains couldn't 
> actually reduce the mean air temperature. I tried upping the 
> infiltration rate, but it didn't really affect the temperature 
> besides what I thought was just transferring more of the outside are 
> to the inside. 
> 
> Anyway, if anyone could inspect my idf (Market export to E+ H20 use 
> equipment - Jan 30) and see compare the mean air temperature with and 
> without the water use equipment, and see why I don't see a difference 
> in the temperature that would be great!
> 
> cheers, and avva good weekend,
> Danny
> 
> 
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Danny Bishop" 
> <bish.dj@...> wrote:
> >
> > Hi Brent
> > 
> > I did consider that, but when I change the latent to sensible gains 
> I do get
> > a temperature drop.
> > 
> > Danny
> > 
> >  
> > 
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx] On Behalf Of Griffith, 
> Brent
> > Sent: Thursday, 31 January 2008 5:19 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > Subject: RE: [EnergyPlus_Support] Water Use Equipment as mister 
> simulation
> > 
> >  
> > 
> > If you are conditioning the zone, eg. with Purchased Air, then the 
> zone
> > air drybulb temps are going to stay the same (because they are being
> > controlled). Check the change in purchased air power. 
> > 
> > ________________________________
> > 
> > From: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com> 
> > [mailto:EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com> ] On Behalf Of 
> bish.dj61
> > Sent: Wednesday, January 30, 2008 4:21 AM
> > To: EnergyPlus_Support@xxxxxxxxxxxxxxx
> > <mailto:EnergyPlus_Support%40yahoogroups.com> 
> > Subject: [EnergyPlus_Support] Water Use Equipment as mister 
> simulation
> > 
> > hi All
> > Well I have created the mister cooling simulation using the 
> > recommendation that I got with the Water Use Equipment. I have got 
> > everything working, and been able to observe the "latent heat rate 
> to 
> > zone" variable and "zone relative humidity" behave fairly well. 
> What I 
> > haven't been able to do is actually change the mean air temperature 
> of 
> > the zone which is what I am trying to do. 
> > 
> > If I change the flow rate of the water use equipment from 0 to a 
> high 
> > number that pushes the rel humidity through the roof it doesn't 
> change 
> > the mean air temperature. 
> > 
> > If anyone could tell me what I am doing wrong it would be great!
> > cheers
> > Danny
> > 
> > [Non-text portions of this message have been removed]
> > 
> >  
> > 
> > 
> > 
> > [Non-text portions of this message have been removed]
> >
> 
> 
> 
> 
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> 
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> 
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> 
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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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