[TRNSYS-users] R: R: WSHP - heat pump with radiant panel

[David BRADLEY]

Jacopo,

   In addition to Jeff's comment about adding piping and making sure 
that you have a short timestep, the layout of the components looks 
correct; do make sure that the thermostat's "conditioning signal" output 
is connected to the liquid pumps so that there is flow only when there 
is active heating.

   The next step in debugging the simulation is to put in some Type65s 
(online plotters) and plot the mass flow and temperature of the liquid 
leaving each of the components in the loops of your system. This will 
tell you whether the system is operating as intended and just doesn't 
have enough capacity to keep the building up to temperature or if 
perhaps there is an incorrect connection somewhere among the components.

kind regards,

  David


On 06/16/2022 17:18, Jacopo Valente via TRNSYS-users wrote:
>
> *Da: *Jacopo Valente via TRNSYS-users 
> <mailto:trnsys-users at lists.onebuilding.org>
> *Inviato: *venerdì 17 giugno 2022 00:12
> *A: *thornton at tess-inc.com; TRNSYS users mailing list at 
> OneBuilding.org <mailto:trnsys-users at lists.onebuilding.org>
> *Cc: *Jacopo Valente <mailto:jacopovalente at live.it>
> *Oggetto: *[TRNSYS-users] R: WSHP - heat pump with radiant panel
>
> In my idea the thermostat controls the zone temperature of the type690 
> and gives the control signal to the heat pump.
> I try to attach the image again.
>
>
> *Da: *thornton at tess-inc.com
> *Inviato: *giovedì 16 giugno 2022 23:53
> *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] WSHP - heat pump with radiant panel
>
> On 2022-06-16 16:19, Jacopo Valente via TRNSYS-users wrote:
>
> > Equa 3 is the input for the lumped capacitance and this input is the
> > sum between the loads and the “top surface heat transfer” of
> > radiant floor. However i don’t understand why my system doesn’t
> > work: it seams the pump doesn’t exchange and the output temperature
> > remains constant.
>
> Without seeing your project my first guess is that you don't have
> anything turning the pumps on; the thermostat is only connected to the
> heat pump.
>
> Beyond that, PLEASE add some pipes between the components and make sure
> you are operating at reasonable time steps - 5 minutes or so.
>
> Jeff
>
> ----
> Jeff Thornton
> President
> Thermal Energy System Specialists (TESS)
> 3 N. Pinckney Street - Suite 202
> Madison WI 53703
> (608) 274-2577
> www.tess-inc.com <http://www.tess-inc.com>
>
>
> _______________________________________________
> 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
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