[TRNSYS-users] Generating three times more cooling power than necessary, the cooling set temperature doesn't drop

[David BRADLEY]

José Javier,

  You are correct; Type56 is computing the amount of energy required to 
maintain the space at the set point temperature you have provided. You 
can artificially limit the amount of cooling capacity that you make 
available, in which case the set point temperature will not be 
maintained and you'll be able to see by how much the temperature in the 
space is exceeding the set point.

  It sounds to me as though your simulation is mixing two concepts: 
energy rate control and temperature level control. Please refer to the 
archives of this mailing list for some discussions on the topic.

kind regards,

  David


On 05/31/2021 04:42, RUBIO RUBIO, JOSÉ JAVIER via TRNSYS-users wrote:
>
> Absolutely. I asked it because in previous systems I have developed, 
> the set temperature dropped sometimes so now it seems weird to me that 
> providing more cooling power the set temperature doesn’t drop. It is 
> clear then that the cooling type from TRNBuild only begins to work 
> when temperature is higher than the temperature set.
>
> Thanks Arian,
>
> Regards.
>
> José Javier Rubio Rubio.
>
> *De:* Arian Bahrami <arianbhm at yahoo.com>
> *Enviado el:* lunes, 31 de mayo de 2021 11:37
> *Para:* TRNSYS users mailing list at OneBuilding.org 
> <trnsys-users at lists.onebuilding.org>
> *CC:* RUBIO RUBIO, JOSÉ JAVIER <josejavier.rubio at edu.upct.es>
> *Asunto:* Re: [TRNSYS-users] Generating three times more cooling power 
> than necessary, the cooling set temperature doesn't drop
>
> Hi,
>
> I am not sure what you developed since it seems you don't understand 
> the basics. The set points of the cooling are the temperatures that 
> the zone Temp should be higher than those set points so the systems 
> starts working. You got your required temperature as you set. How do 
> you expect to see less temperature while it is working?
>
> Arian
>
>
> Sent from Yahoo Mail for iPhone 
> <https://overview.mail.yahoo.com/?.src=iOS>
>
> On Monday, May 31, 2021, 11:49 AM, RUBIO RUBIO, JOSÉ JAVIER via 
> TRNSYS-users <trnsys-users at lists.onebuilding.org 
> <mailto:trnsys-users at lists.onebuilding.org>> wrote:
>
>     To whom it may help,
>
>     I have developed a cooling system with cooling coils to produce
>     the cooling power that is needed for the zones of my warehouse.
>     Those cooling coils produce three times more cooling power than
>     the different zones of my warehouse need. There are four zones
>     which different set temperature: three of them with 4 Celsius
>     degrees and the other one with 8 Celsius degrees. Despite the fact
>     I generate three times more cooling power than they need, why the
>     air temperature of the zones do not drop below their set temperature?
>
>     Thanks in advance,
>
>     Regards,
>
>     José Javier Rubio Rubio.
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems 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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