[TRNSYS-users] TRNSYS Simulation Fresnel & steam

Tue Oct 1 02:41:54 PDT 2019

Dear Jeff,

Thank you for your response.

It would be nice if you could perform the quotation for that model. Our idea is to simulate the system of the figure with Fresnel collectors:

[cid:image001.png at 01D5784D.28748F00]

Kind regards,

[cid:image002.png at 01D5784D.28748F00]<http://fcirce.es/>
www.fcirce.es

PhD. Lucía Royo Pascual
Technology Project Manager
Industrial Processes Group
Industry and Energy Area

Parque Empresarial Dinamiza, Avda. Ranillas 3D,1ª Planta
50018 Zaragoza (España)
T. [+34]  976 976 859 / Ext. [+34] 2112
lroyo at fcirce.es<mailto:lroyo at fcirce.es>

De: Jeff Thornton <thornton at tess-inc.com<mailto:thornton at tess-inc.com>>
Enviado el: martes, 20 de agosto de 2019 3:40
Para: TRNSYS users mailing list at OneBuilding.org <trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>>
Asunto: Re: [TRNSYS-users] TRNSYS Simulation Fresnel & steam

Lucio,

The current models in the TESS Libraries do not include the option for two phase flow in the solar collector models.  If this is of great interest, we could prepare a quote to perform the necessary changes to allow for steam.

Let me know!

Jeff - TESS
Sent from my iPhone

On Aug 13, 2019, at 8:00 AM, Lucia Royo Pascual via TRNSYS-users <trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>> wrote:
Dear Jeff,

First of all, thank you in advance for your response.

Regarding your proposal, it could be a nice solution to overcome the simulation of steam by means of a steam generator. However, as a first step I would be interested (if it is possible) to simulate the boiling process within the Fresnel collector as a direct steam generator (DSG). Have you developed any library that can simulate that effect?

Thank you in advance,

Kind regards,

<image001.png><http://fcirce.es/>
www.fcirce.es

PhD. Lucía Royo Pascual
Technology Project Manager
Industrial Processes Group
Industry and Energy Area

Parque Empresarial Dinamiza, Avda. Ranillas 3D,1ª Planta
50018 Zaragoza (España)
T. [+34]  976 976 859 / Ext. [+34] 2112
lroyo at fcirce.es<mailto:lroyo at fcirce.es>

De: Jeff Thornton <thornton at tess-inc.com<mailto:thornton at tess-inc.com>>
Enviado el: lunes, 12 de agosto de 2019 20:03
Para: TRNSYS users mailing list at OneBuilding.org<http://OneBuilding.org> <trnsys-users at lists.onebuilding.org<mailto:trnsys-users at lists.onebuilding.org>>
Asunto: Re: [TRNSYS-users] TRNSYS Simulation Fresnel & steam

Lucia,

The collector models that you reference are not intended to work with two-phase flow like steam and were written assuming constant liquid inlet and outlet fluid properties.  Have you considered keeping the collector loop isolated from the steam loop and utilizing a steam generator to create the steam?  Many of the large solar power plants utilize this concept.

Jeff

---
Jeff Thornton

President - TESS LLC

3 N. Pinckney Street, Suite 202, Madison WI USA 53703

Office: (608) 274-2577  Fax: (608) 278-1475

www.tess-inc.com<http://www.tess-inc.com>

E-Mail: thornton at tess-inc.com<mailto:thornton at tess-inc.com>

On 08/12/2019 1:16 am, Lucia Royo Pascual via TRNSYS-users wrote:
Hello TRNSYS users,

I am writing to you this e-mail in order to ask you about the simulation of steam cycle using a solar field (Fresnel or flat plate collector).

The idea is to simulate the water-steam stream using the solar field. I have seen that there is the possibility to use a flash tank to separate water and steam in the TESS library. In this tank, it is possible to define the pressure. However, I have seen that in the solar collector field it is not possible to fix the outlet pressure, only the Cp can be modified.

Could you explain me briefly how can I change the outlet pressure in the collector type? It is possible to define steam at the outlet using a control? Is there any example that I can use to start my simulation?
I have TESS libraries, but I have seen that there is no example of this feature…

Thank you in advance,

Kind regards,

<image001.png><http://fcirce.es/>
www.fcirce.es<http://www.fcirce.es>

PhD. Lucía Royo Pascual
Technology Project Manager
Industrial Processes Group
Industry and Energy Area

Parque Empresarial Dinamiza, Avda. Ranillas 3D,1ª Planta
50018 Zaragoza (España)
T. [+34]  976 976 859 / Ext. [+34] 2112
lroyo at fcirce.es<mailto:lroyo at fcirce.es>

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