Re: [EnergyPlus_Support] Queries with the branches

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

Francisco:

My apologies for the very slow response to your request.  Your 
message got lost in the backlog of e-mail over the holidays.  See 
answers below.

Mike Witte





On 22 Dec 2001, at 18:53, Francisco José Lara Garachana wrote:

> Some queries about the branches:
> 
> - As I have understood from the InputOutput Reference a BRANCH is
> the collection of components in series.When 2 nodes are connected
> directly without any component between them, this has to be
> defined as a PIPE. A LOOP is a collection of branches (i.e. Air
> Loop) and so is requested in the Air Primary Loop Object in the
> Field Air Loop Branch List Name. As a PIPE is a branch with no
> components inside, how can I include the pipe into the Air Loop
> Branch List? 

A PIPE is considered a component on a BRANCH.  So in order to include 
a PIPE in a system, you must include a BRANCH in the appropriate 
Branch List and then list a PIPE in the BRANCH object.  For instance, 
your branch list might include a branch named "HW Bypass Branch", and 
then you would have a BRANCH object by that same name and the 
componenet list would be "PIPE, HW Bypass Pipe".

> 
> - Do the Air Loop side node (Return Air Loop Inlet Node or Supply
> Air Loop Outlet Node) need to be connected with the Zone Equipment
> nodes (Zone Equip Group Outlet Node or Zone Equip Group Inlet
> Node) with a PIPE and in that case, in which loop do I have to
> include them? 

No PIPE is necessary for this connection.

> 
> - In a splitter or mixer, the inlet node(s) and the outlet node(s)
> need to be connected with a PIPE ? 
> 

No PIPE is necessary here, either.  In general, the only places where 
PIPES are used are the main inlet or outlet branch of the demand-side 
and supply-side of a water loop and for bypass branches if they are 
used.  The best way to learn when to use PIPES is to look at the 
example input files in EnergyPlus\ExampleFiles\Misc.



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