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Re: [EnergyPlus_Support] Re: HVAC Node Flow Chart



Phillipe

Have you worked with the expanded input data files before? I really have no idea how much you know about EnergyPlus so its difficult to know where to start...

Any time you include an HVAC Template object, EnergyPlus runs a routine in which it expands the HVACTemplate into the components that it describes. EnergyPlus then saves that expanded input data file as type .expidf

If you simply change the file extension of this expanded input file to end with .idf, you can open this file in any text editor or idf editor.

In this way, you can see all of the nodes produced by the HVAC Template expansion

This should give you working examples of how to set up your node pathways for any system with an HVAC Template

You should know that EnergyPlus defines all loops in terms of supply and demand. Once you've mapped out the node pathways, you can begin swapping out supply equipment for other supply equipment and demand equipment for other demand equipment.

I have attached a sample node diagram that I have created for a VAV airloop. If you need further assistance please feel free to contact me outside of the forum at jason.kirkpatrick@xxxxxxx

Hope this helps,

Jason

On Wed, Jun 29, 2011 at 5:23 PM, jipp06 <jippnojunk@xxxxxxxxx> wrote:
 

Hi,
I would rephrase the question my way. Or maybe that is a different question!

I have been using HVACTemplates and did not have to bother too much with nodes and air paths before. But now I would like to get to the next level.
I would also need some assistance, with a tutorial or another mean, to understand how to layout an air path and nodes. Because there's more than what is represented on the svg file. I have tried to figure the way a basic example system is laid out but could not really grasp all the basics.

Need to understand the fundamentals of system input. Did I miss a section of the I/O manual?

thx
J-Philippe Beaulieu



--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "ooikoonbeng2004" <ooi_kb3@...> wrote:
>
> Matthew,
>
> Not sure what you mean by "How to plot nodes before you begin modelling?
>
> An svg (spatial vector graphics) file is generated for the HVAC after each run. It shows the connections within each plant loop and between different loops.
>
> What is not given in this svg diagram, which can also be deciphered with a text editor, are the node names.
>
> ooi
>
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Matthew Anderson <matthew.sverre.anderson@> wrote:
> >
> > Hey everybody,
> >
> > I am currently getting more and more into EnergyPlus but I am having a heck
> > of a time trying to keep the nodes straight for the HVAC systems. Is there
> > any sort of flow chart or tutorial that gives good examples of how to plot
> > nodes before you begin modeling to decrease the time needed for debugging?
> >
> > Thank you,
> > Matthew Anderson
> > Energy Engineer
> >
>




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Attachment not found:
d:\eudora\attach\SOM_EnergyPlusTraining_VAV System.ppt