[TRNSYS-users] TRNSYS Simulation Fresnel & steam

[Jeff Thornton]

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> 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>
> 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
>  
>  
>  
>  
> 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
> E-Mail: 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>
> 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
>  
>  
>  
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