[TRNSYS-users] help about pond modeling

Fri Jul 8 06:44:05 PDT 2022

Dear Maryam,

no, the mass flow rate of the fresh water enters the pool at the temperature specified in input 10 and replacing some of the water in the pool ( at pool temperature, eq. 12 in the manual)
[cid:7cb72a1f-4c13-4052-98ec-e7ecd27d0e91]

The heater has its own massflow replacing some of the water at pool temperature with water of the heating set temperature (eq. 14 in the manual)
[cid:022b4594-7328-4702-a228-73e27c0fa919]

Best regards,
Christina

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Transsolar KlimaEngineering

Stuttgart  | München | Paris | New York

https://www.trnsys.de<https://www.trnsys.de/>
https://transsolar.com/de

<https://www.trnsys.de>

Transsolar Energietechnik GmbH | Curiestraße 2 | 70563 Stuttgart

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Von: Maryam Khademi <m.khademi67 at outlook.com>
Gesendet: Mittwoch, 29. Juni 2022 01:01
An: hotline <hotline at Transsolar.com>; TRNSYS users mailing list at OneBuilding.org <trnsys-users at lists.onebuilding.org>
Betreff: RE: help about pond modeling

Thank you for your helpful comments. In the first stage I will ignore the precipitation.

Now I have a question about the parameter “ mass flow rate of fresh water ”

Is it the inlet flow of the heater or not?

I mean in TYPE 344, flow rate of fresh water works as the total amount of outlets and heated water works as the total amount of inlets.

Am I correct?

Specially thanks,

Maryam

From: hotline<mailto:hotline at Transsolar.com>
Sent: Tuesday, June 28, 2022 6:49 AM
To: TRNSYS users mailing list at OneBuilding.org<mailto:trnsys-users at lists.onebuilding.org>
Cc: Maryam Khademi<mailto:m.khademi67 at outlook.com>
Subject: AW: help about pond modeling

Dear Maryam,

As type 344 models a fully mixed volume of water (no temperature gradient), you probably don't really need to define more than one in-/output, as the temperature everywhere would be the same. So if you have more than one in-/output in your system, I would suggest you mix the different massflows outside of the pond model and enter the resulting total massflow through one input together.

Does the overall mass of water in your pond change due to the precipitation or does it stay the same (additional water overflowing)? If you know the amount of precipitation per hour and its temperature and the total mass in your pond stays the same, you could proceed in the same way as described above, adding the additional amount of cold water from precipitation to your overall massflow.

Best regards,

Christina

__________________________________________________________________________________________________

Transsolar KlimaEngineering

Stuttgart  | München | Paris | New York

https://www.trnsys.de<https://www.trnsys.de/>
https://transsolar.com/de

Transsolar Energietechnik GmbH | Curiestraße 2 | 70563 Stuttgart

Geschäftsführer: Matthias Schuler, Thomas Auer, Stefan Holst, Dieter Schnelle

Registered at Amtsgericht Stuttgart HRB 23347 | USt-IdNr.: DE 152272639

The simulation project you have sent will be stored on the local servers of Transsolar Energietechnik GmbH for the duration of the project support. Our employees are obliged by us to confidentiality. After this period, all project-related data is deleted.

The storage of your personal e-mail and other contact information is based on the mutual interest in the execution of this traffic and on a mutual business contact. If you have any questions, please contact our data protection officer at privacy at transsolar.com<mailto:privacy at transsolar.com>. Our privacy policy can be found here<http://www.trnsys.de/docs/userservice/userservice_dataprivacy_en.htm>.

Von: TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org> im Auftrag von Maryam Khademi via TRNSYS-users <trnsys-users at lists.onebuilding.org>
Gesendet: Mittwoch, 8. Juni 2022 13:45
An: TRNSYS users mailing list at OneBuilding.org <trnsys-users at lists.onebuilding.org>
Cc: Maryam Khademi <m.khademi67 at outlook.com>
Betreff: [TRNSYS-users] help about pond modeling

Hello,

I selected Type 344b to simulate a pond. The problem is that I need to consider precipitations and also this pond have two outlets and two inlets and this type doesn’t have the ability of define inlets and outlets.

What is your suggestion for me in this regard?

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