[TRNSYS-users] Multiple diverter/mixer type?

[Jones Marcus]

Thanks for pointing me towards the TESS mixer/splitter, that makes life a little easier!

A more philosophical question to the community - what are the best strategies for modeling a complex flow network within the limitation that TRNSYS imposes - that of not being able to model pressure-driven flow? I have a network where 6 pumps feed 6 loads, combining chilled water from three tanks. My take on the problem is to set each splitter fraction to the fraction that balances the system, using equations based on functions of the varying pump flow rates. This is very unintuitive and consequently error prone. And looking at the image file attached, my model doesn't need any more complexity.

I don't think using the "flow rate as input" pumps work well in this case since there is no central place where all flows are combined. Just wondering if anyone has any other strategies?

Any plans to model pressure driven flow in the future?

-Marcus


MARCUS JONES, MSc

Energy Department

Sustainable Building Technologies



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-----Original Message-----
From: Matt Duffy [mailto:duffy at tess-inc.com]
Sent: October 16, 2009 3:36 PM
To: Jones Marcus; trnsys-users at cae.wisc.edu
Subject: Re: [TRNSYS-users] Multiple diverter/mixer type?


Hello Marcus,

The TESS Hydronics Library contains a diverter and mixer that can have up
to 100 ports. I can send you a general description or PIO upon your
request.

Best,

Matt


----- Original Message -----
From: "Jones Marcus" <marcus.jones at ait.ac.at>
Sent: Fri, October 16, 2009 7:00
Subject:[TRNSYS-users] Multiple diverter/mixer type?


Dear TRNSYS Experts;

Just wondering if anyone knows of a multiple port diverter / mixer Type in
TRNSYS?
We have the case where water or air is often split into multiple streams
and then
mixed back down. We currently use multiple Type 11's in a tree. But it
would be nice
to have a Type where we specify a variable number of ports in a cycle
variable.

Any existing Type or plans for such a Type?

Cheers,

-Marcus


MARCUS JONES, MSc

Energy Department

Sustainable Building Technologies



AIT Austrian Institute of Technology

Österreichisches Forschungs- und Prüfzentrum Arsenal Ges.m.b.H.

Giefinggasse 2 | 1210 Vienna | Austria

T +43(0) 50 550-6387 | M +43(0) 664 210 24 15 | F +43(0) 50550-6598

marcus.jones at ait.ac.at<mailto:marcus.jones at ait.ac.at> |
http://www.ait.ac.at<http://www.ait.ac.at/>

FN: 165088b HG Wien | UID: ATU46577208 This email and any attachments
thereto, is
intended only for use by the addressee(s) named herein and may contain
legally
privileged and/or confidential information. If you are not the intended
recipient,
please notify the sender by return e-mail or by telephone and delete this
message
from your system and any printout thereof. Any unauthorized use,
reproduction, or
dissemination of this message is strictly prohibited. Please note that
e-mails are
susceptible to change. Österreichisches Forschungs- und Prüfzentrum Arsenal
Ges.m.b.H. shall not be liable for the improper or incomplete transmission
of the
information contained in this communication, nor shall it be liable for
any delay in
its receipt.

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----- End of original message -----

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