[TRNSYS-users] Fwd: TRNSYS

[Hadi Tannous]

Hi,
Sorry, I forgot to mention one thing.

I am following the attached paper and trying to set up the system they
present. I use the same components they use but I am not getting the same
results.

Sorry for the repetitive emails but I am extremely desperate to solve this
issue and get my system running. Will it be possible to discuss this
problem over a Zoom call?

Thanks in advance,
Hadi

On Tue, Apr 11, 2023 at 12:32 AM Hadi Tannous <hadieliastannous at gmail.com>
wrote:

> Hi Jeff,
>
> Thanks for your quick responses. My deadline is approaching and I have
> been stuck on this for days.
>
> I plotted the flow rate and temperature in and out of the tank with the
> heating elements off, as attached. The flow rate in and out of the tank is
> balanced (all at 60kg/hr). It also seems the PVT is having an effect on the
> temperature in the tank.
> [image: image.png]
>
> [image: image.png]
>
> I tried another period in April when the PVT achieved a temperature higher
> than 40 C, but as you see, the tank is providing the temperature to the
> load at a lower temperature when the heating elements are still off.
> [image: image.png]
>
> When heating elements are on, the tank provides a temperature of 40 C to
> the load, as seen below.
> [image: image.png]
>
> It is also weird that at some moments, the temperature from the tank to
> the PVT (blue) is higher than the temperature from the PVT to the tank
> (red).
> Any thoughts?
>
> Thanks,
> Hadi
>
>
> On Mon, Apr 10, 2023 at 10:20 PM <thornton at tess-inc.com> wrote:
>
>> On 2023-04-10 16:14, Hadi Tannous wrote:
>>
>> > Thanks for the response. I am not sure how to monitor if the solar
>> > system is supplying any energy to the tank. I tried to increase the
>> > size of the PVT and monitor the average temperature of the tank
>> > (heating elements off). It does not seem to have much effect as you
>> > can see.
>>
>> One plot per year doesn't tell you much - try plotting weekly.  Then
>> simply plot the flow rate of the solar system into the storage tank to
>> see if it's doing anything.
>>
>> 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
>>
>
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