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Martin,<br>
A couple of pointers come to mind (and these apply to systems in
general, not just to this particular system).<br>
<br>
1. There should also be a pump in the loop whose rated flow rate
matches the hot water flow requirements of the absorption chiller.
The pump should be controlled in the same manner as the chiller so
that if there is no load on the chiller, both the chiller and the
pump turn off.<br>
<br>
2. There should probably be an auxiliary heating device in the loop
(Type6 perhaps) that raises the liquid temperature going to the
chiller in case the water in the tank was not hot enough.<br>
<br>
3. Most importantly, make sure that the tank is large enough to
contain more than one timestep's worth of flow from the pump. For
example, if your pump has a rated flow rate of 10000 kg/h and you
are running with a 5 minute timestep, your tank needs to be more
than 833L. If you try and run with a 1-hour timestep, you will
almost never get convergence because the tank volume turns over more
than once in a timestep.<br>
Best,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/29/2012 04:24, Martin Ssembatya
wrote:<br>
</div>
<blockquote
cite="mid:CAOVnU7s=Yj06_wsCCOCV5+9UZgLgzozDZ4dEzGMCyPTRtKKfuA@mail.gmail.com"
type="cite">
<div dir="ltr">Hello there,<br>
<br>
I am carrying out ma Msc. thesis project involving simulation of
a solar cooling system. The system contains an absorption
chiller connected to a hot thermal storage tank that receives
hot water from solar thermal collectors. I am finding a problem
with making a closed loop between the absorption chiller
(modeled with type 107) and the storage tank (modeled with type
4a). Every time i try to connect the hot water absorption
chiller outlet temperature as the inlet temperature of the cold
side of the tank, the system returns unexpected errors (i.e lack
of convergence). Am getting stuck on this. Can some one please
help me with some information how i can go about this problem.<br>
<br>
Thanks in advance<br>
<br>
Martin <br>
</div>
<br>
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