[EnergyPlus_Support] water heater issue

["davide.loba" <davide.loba@xxxxxxxxx>]

It was my fault! I did not remember to insert that controller in the
CONTROLLER LIST.

Now I have another problem with a water tank. To be more clear, I
briefly explain the hot water loop: on the supply side there are 2
WATER:HEATER objects. The first one is used to store the heat coming
from the solar collectors. This component works, I mean, th "Use side"
and the "source side" flows are bigger than 0 during the simulation,
and also the tank temperature varies, accordingly with the collector's
heat production and the loop demand. The second one is connected with
a heatpump and two boilers, on its source side.  Water heaters are set
as passive components. The problem is that the second tank seems to be
off. The water heater temperature is fixed to what has been inserted
as "setpoint temperature schedule", and remains the same during the
whole run period. Use and source side rates are 0 W. 
Like the "svg" file shows, loop connections are ok (except for one
heat exchanger, that is repeated over 100 times in the diagram, but
this must be a bug,I suppose). Even if I change the load distribution
scheme, from "sequential" to "uniform", or I change the componet's
order, I still have the same behaviour.
I don't understand the reason why the first tank works but the second
one doesn't. Do you have any ideas on how to solve this problem? 

I have uploaded my idf to the folder: \_Problem_Submittals\Acqui Terme
Loba.zip (There are many other things to fix in the idf, and many
values need to be set correctly, but first of all, I would like to
solve this problem).

Loba

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
<mjwitte@...> wrote:
>
> If you report the mass flow or volume flow rate on the inlet to the hot 
> water regen coil, is there flow?
> 
> Is the controller for the regen coil in the CONTROLLER LIST for the 
> OUTSIDE AIR SYSTEM?
> 
> Mike
> 
> 
> davide.loba wrote:
> > There is not any error because I don't insert any regeneration air 
> > heater under DESICCANT DEHUMIDIFIER section. I would a water coil as 
> > regeneration coil, not a gas or electric one, and I'm trying a 
> > different strategy. I "manually" put a water coil just before the 
> > Desiccant Heat Exchanger, and control it with a CONTROLLER:SIMPLE 
> > controller and a SCHEDULE:SETPOINT setpoint on air outlet node. Thus, 
> > I don't get any error, but the coil is always off. Maybe it is not 
> > possibile to control a coil placed on relief air stream. 
> > What do you think? 
> >
> >
>




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