[TRNSYS-users] R: water-water heat pump simulation

[David BRADLEY]

Jacopo,

   I think you would take the energy transfer outputs from the radiant 
floor model and impose them on Type690 as part of the sensible load on 
the space. Basically your radiant floor would augment or diminish the 
instantaneous gains that are already computed for your space.

kind regards,

  David


On 05/18/2022 09:21, Jacopo Valente wrote:
>
> Thank you for your suggestion. I understand the idea to have a lump 
> capacitance to represent the zone and then control its temperature. 
> However, I only know the type 690 which input refers to an air flow 
> rate. Is there a corresponding type to use in a water-water heat pump, 
> so with a water flow rate?
>
> Thank you again.
>
> kind regards,
>
> Jacopo
>
> *Da: *David BRADLEY <mailto:d.bradley at tess-inc.com>
> *Inviato: *lunedì 16 maggio 2022 20:00
> *A: *TRNSYS users mailing list at OneBuilding.org 
> <mailto:trnsys-users at lists.onebuilding.org>
> *Cc: *Jacopo Valente <mailto:jacopovalente at LIVE.IT>
> *Oggetto: *Re: [TRNSYS-users] water-water heat pump simulation
>
> Jacopo,
>
>  This is a little bit tricky; the problem is that the loads you have 
> are presumably instantaneous heating and cooling loads. If your 
> delivery device were something without a lot of thermal mass (like 
> zonal heat pumps or some fan coils) then I would recommend that you 
> impose the loads directly onto the liquid stream. However, the radiant 
> floor has a lot of thermal mass of its own. I think the best approach 
> would be to impose your loads on a lumped capacitance that is tuned to 
> mimic the zone. Then you can define a radiant floor using Type653 in 
> order to control the temperature of the lumped capacitance that has 
> your original building loads imposed upon it.
>
> kind regards,
>
>  David
>
> On 05/16/2022 09:16, Jacopo Valente via TRNSYS-users wrote:
>
>     Dear trnsys users,
>
>     I’m simulating a ground water source heat pump for residential
>     conditioning system. I have the hourly load profile of the
>     building and i’m not using the type56. However my system has
>     radiant floor as emmiter and i see that it’s possible to use
>     type653 only with building type56. I’m looking for a way to
>     simulate this kind of implant, i try with type 690 but i’m not
>     sure it’s right for a water system. Any suggestions to simulate my
>     implant without type56?
>
>     Thank you every all
>
>     Best regards,
>     Jacopo Valente
>
>
>
>     _______________________________________________
>
>     TRNSYS-users mailing list
>
>     TRNSYS-users at lists.onebuilding.org
>
>     http://lists.onebuilding.org/listinfo.cgi/trnsys-users-onebuilding.org
>
> -- 
> ***************************
> 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
>
-- 
***************************
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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.onebuilding.org/pipermail/trnsys-users-onebuilding.org/attachments/20220519/ac563459/attachment.htm>