[TRNSYS-users] abnormalty in plots for zone cooling

[David BRADLEY]

Talib
   Without looking at your project file, it isn't really possible to 
know what the problem might be. If the tank temperature is going 
negative, I would imagine that there is a cold stream of water coming 
into the tank (perhaps coming back from the chiller under low-load 
situations?) To investigate, use an online plotter and plot the 
temperature and flow rate into and out of all the ports in the tank; see 
if it is obvious which one is the cause of the problem. As for the 
collector, again, plot the flow rate and temperature into and out of 
each device in the flow loop. Look also at your controls; it may be that 
the collector never gets hot enough for the collector pump to turn on or 
it may be that the system is operating only on its auxiliary heat and 
that the collector just isn't contributing much to the overall performance.
Kind regards,
  David



On 1/2/2013 08:28, Talib Ahmadu wrote:
> Dear users
> In my model of an absorption cooling for a multizone office, I have 
> some issues which i would like to get clearification from users.
> I considered the system to be working by checking the zone 
> temperatures to see if they have dropped in temperature, is this 
> correct? (temperatures dropped).
> Secondly, i tried to vary the collector area to see the effect on the 
> performance, but it stays thesame even with a collector area of zero, 
> why is this so?
> Thirdly, i see negative values in the hot storage tank temperature.
> Positive responses will be appreciated.
> Thanks.
> Talib
>
>
>
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> TRNSYS-users at cae.wisc.edu
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-- 
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David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI  53703 USA

P:+1.608.274.2577
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d.bradley at tess-inc.com

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