[TRNSYS-users] Evaporation tank with resistances

David BRADLEY d.bradley at tess-inc.com
Tue Jun 20 07:05:06 PDT 2023


Pablo

   Interesting question! we are moving this email list to a forum that 
provides searchable archives. I posted your question (and responded to 
it) on the forum. You can visit: https://trnsys.org/community/

kind regards,

  David


On 6/20/2023 7:05 AM, Pablo Calleja via TRNSYS-users wrote:
> Hello everyone,
>
> I am trying to develop a code por a new Type that simulates a tank 
> conected to a freshwater source, with three electric resistances 
> inside of it in order to produce steam.
>
> It's operation follows this path:
> - By pushing a button, the tank is switched on, letting water inside 
> the tank.
> - When the water reaches the minimum level of the tank (there's a 
> sensor that sends a signal to the machinery opperating the system), 
> the three resistances switch on.
> - There is another sensor that sends another signal when the water 
> level reaches the maximum capacity of the tank. When this sensor 
> detects liquid, the inlet flow is shut down.
> - When the water level goes down lower than the minimum capacity, the 
> inlet flow is switched on again.
> - There is also a thermometre that measures the temperature inside the 
> tank. If that temperature is lower than the maximum temperature, the 
> resistances are switched on. Once we reach maximum temperature, they 
> are switched off, until the minimum temperature is reached and the 
> resistances are switched on again.
>
> My main question is: *since the water level is measured by sensors, 
> how can I write down the commands that allow the resistances and inlet 
> flow switching on and off? *There will be calculations inside, but the 
> main problem I face is this lack of knowledge for incorporating 
> sensor's coding inside this new Type and if this signals should be an 
> input with a proper dimmension.
>
> Thanks in advance for your time, hopefully somebody can help me with 
> this issue.
>
> Kind Regards,
>
> Pablo Calleja
>
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> TRNSYS-users at lists.onebuilding.org
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-- 
***************************
David BRADLEY
Principal
Thermal Energy System Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com
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