[TRNSYS-users] TRNSYS Simulation Fresnel & steam

[Lucia Royo Pascual]

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,


[cid:image001.png at 01D551E3.75800D50]<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>
Enviado el: lunes, 12 de agosto de 2019 20:03
Para: TRNSYS users mailing list at OneBuilding.org <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,

[cid:image007.png at 01D49187.2B8C8970]<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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