[TRNSYS-users] TRNSYS counter function

[Angel Carrera via TRNSYS-users]

Hi Olivier,

yes, too many time steps for that; then I suggest you try to use type 939
from TESS utility library, you can trigger based on having a running
average of your signal (input) over last 45 minutes=1, hope it helps

Angel

2016-11-14 16:46 GMT+01:00 <olivier.quevillon.1 at ens.etsmtl.ca>:

> Thank you for your answer Angel,
>
> I've already looked at this component but it does not seem to work as I
> would want.
>
> I see that I was unclear with what I intented to do:
>
> Basically, I want to wait about 45 minutes before triggering the Defrost
> signal to confirm the conditions for defrosting are met during this time
> lapse (Heating signal and temperature below about 6 °C).
>
> However, if during those 45 minutes of waiting, the conditions change (No
> heating signal or temperature rises), I want to be able to reset the
> counter and start again when the conditions are met.
>
> In Matlab or Python, I would do that with a "While" loop, for example.
>
> With Type 93, I have to look at all the timesteps of those 45 minutes . I
> could however add en equation that would calculate the average signal
> during the 45 minutes and trigger the defrost signal. I will need to look
> into how to do this. I am running a 0.01h timestep, meaning 75 timesteps to
> evaluate.
>
> I hope this clarifies what I intend to do.
>
> Olivier Quevillon
>
> Étudiant à la maîtrise en Génie Mécanique
> École de Technologie Supérieure
> ------------------------------
> *De :* Angel Carrera [angel.carrera at aiguasol.coop]
> *Envoyé :* 14 novembre 2016 04:54
> *À :* Quevillon, Olivier; TRNSYS users mailing list at OneBuilding.org
> *Objet :* Re: [TRNSYS-users] TRNSYS counter function
>
>
> Hi,
>
> not sure if I understood right, but I think I use the input value recall
> for essentially the same problem: pass the condition (heat and ambient
> temperature under your limit) to type 93 as a 0/1, and sum the outcome of
> the number of time steps necessary to reach "a certain time". If the sum is
> equal to the required value, trigger the defrost condition. Hope it helps,
> regards
>
> Angel
>
> 2016-11-13 4:17 GMT+01:00 via TRNSYS-users <trnsys-users at lists.
> onebuilding.org>:
>
>> Hello everyone,
>>
>> I am trying to figure out a way to model a defrost timer on as air source
>> heat pump. To do so, I would have to set up a counter that would activate a
>> defrost cycle (force heat pump into cooling mode) after the heat pump has
>> been working in heat mode and the outside temperature is below a certain
>> limit for a certain amount of time.
>>
>> I have tried using Type 1233, but this component does not wait before
>> triggering the output, it rather starts right away when the conditions are
>> met, then is stuck in OFF position for a certain amount of time.
>>
>> Any help with this issue would be appreciated.
>>
>> Thanks!
>>
>> Olivier Quevillon
>>
>> Étudiant à la maîtrise en Génie Mécanique
>> École de Technologie Supérieure
>>
>> _______________________________________________
>> TRNSYS-users mailing list
>> TRNSYS-users at lists.onebuilding.org
>> http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>>
>>
>
>
> --
>
> Àngel Carrera Martín
> Consultor sènior en Sistemes
> Llicenciat en ciencies físiques
> Sistemes Avançats d'Energia Solar Tèrmica - AIGUASOL
>
>            +(00) 34 663 276 680   Roger de Llúria 29, 3r 2a
> *angel.carrera at aiguasol.coop* <angel.carrera at aiguasol.coop>   08009
> Barcelona
>               angel_aiguasol   Tel: (+34) 933 424 755
>                               www.aiguasol.coop
> <http://www.aiguasol.coop/>
>



-- 

Àngel Carrera Martín
Consultor sènior en Sistemes
Llicenciat en ciencies físiques
Sistemes Avançats d'Energia Solar Tèrmica - AIGUASOL

           +(00) 34 663 276 680   Roger de Llúria 29, 3r 2a
*angel.carrera at aiguasol.coop* <angel.carrera at aiguasol.coop>   08009
Barcelona
              angel_aiguasol   Tel: (+34) 933 424 755
                              www.aiguasol.coop
<http://www.aiguasol.coop/>
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