Referring to your diagram below:
The first T juction, the vertical branch flows downwards. The down arrow is part of a spliter.
The second T junction, the vertical branch flows upwares. The up arrow is part of a mixer.
What you are suggesting is that the mixer can be before the spliter.
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The branch between a mixer and a spliter is usually a single branch, if the flow is from the mixer to the spliter.
Multiple branches are always between a spliter and a mixer with the flow from the spliter to the mixer. Therefore the spliter has oullet node name connected to the branch inlet node. The branch outlet node is connected the mixer inlet node. The combined mixer node is an outlet node.
In a plant loop, I think you may only have two spliter/mixer pairs, one in the supply side and one on the demand side.
If you start from supply side inlet pipe and goes along the plant loop, it will always be a plitter to include a by-pass branch, a mixer a pipe, the demand side spliter demand side branches, mixer and demand oulet pipe. If the branch listing does not follow this sequence, the connection may not be completed.
Changing the node name in a branch does not change the fluid flow direction. You may call an inlet any name, it is still an inlet node for the fluid.
This is why in the last mail I mentioned that someone called the return air node of the OA mixer as OA inlet node. It then mixed up with the Outside air inlet node from the environment. Because the names are uniquer, the zone return air is used in the OA inlet node. This has nothing to do with Fig 93 numbering problem.
A thermal tank may be served by two loops. Source side and use side. In the SVG diagram, a storage tank with the same name may appear in two locations in two loops.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: zqianmin@xxxxxxxxx
Date: Mon, 25 Jul 2011 17:10:17 -0700
Subject: [EnergyPlus_Support] Re: Question about Branches in Loop
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The first T juction, the vertical branch flows downwards. The down arrow is part of a spliter.
The second T junction, the vertical branch flows upwares. The up arrow is part of a mixer.
What you are suggesting is that the mixer can be before the spliter.
==================================
The branch between a mixer and a spliter is usually a single branch, if the flow is from the mixer to the spliter.
Multiple branches are always between a spliter and a mixer with the flow from the spliter to the mixer. Therefore the spliter has oullet node name connected to the branch inlet node. The branch outlet node is connected the mixer inlet node. The combined mixer node is an outlet node.
In a plant loop, I think you may only have two spliter/mixer pairs, one in the supply side and one on the demand side.
"I can switch the inlet and outlet branch name when I define connector:splitter/mixer to switch the location of splitter and mixer, right!?"I do not understand why you want to do the above and how?
If you start from supply side inlet pipe and goes along the plant loop, it will always be a plitter to include a by-pass branch, a mixer a pipe, the demand side spliter demand side branches, mixer and demand oulet pipe. If the branch listing does not follow this sequence, the connection may not be completed.
Changing the node name in a branch does not change the fluid flow direction. You may call an inlet any name, it is still an inlet node for the fluid.
This is why in the last mail I mentioned that someone called the return air node of the OA mixer as OA inlet node. It then mixed up with the Outside air inlet node from the environment. Because the names are uniquer, the zone return air is used in the OA inlet node. This has nothing to do with Fig 93 numbering problem.
A thermal tank may be served by two loops. Source side and use side. In the SVG diagram, a storage tank with the same name may appear in two locations in two loops.
Dr. Li
To: EnergyPlus_Support@xxxxxxxxxxxxxxx
From: zqianmin@xxxxxxxxx
Date: Mon, 25 Jul 2011 17:10:17 -0700
Subject: [EnergyPlus_Support] Re: Question about Branches in Loop
I can switch the inlet and outlet branch name when I define connector:splitter/mixer to switch the location of splitter and mixer, right!?
On Mon, Jul 25, 2011 at 5:04 PM, Qianmin Zhang <zqianmin@xxxxxxxxx> wrote:
Hello,I noticed that all the branches in example files having splitter first and mixer after components. Is there any way I can have mixer first in branch?
There two will have different performance if the supply side is a thermal tank, and disconnect from source side when use side is active?Thanks,Qianmin
__._,_.___
Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx
The primary EnergyPlus web site is found at:
http://www.energyplus.gov
The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/
Attachments are currently allowed but be mindful that not everyone has a high speed connection. Limit attachments to small files.
EnergyPlus Documentation is searchable. Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
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