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Salima Adjiri,<br>
To clarify in case I do not entirely understand your question
typical absorption chillers have a refrigerant that is entirely
internal to the machine and then they have water as a working fluid
in their cooling liquid, chilled liquid and hot liquid loops. I am
not certain whether you are asking about how to change the assumed
refrigerant in Type107 or if you are intending to change the working
fluid in the heat exchange loops. <br>
<br>
The type of refrigerant inside the machine gets wrapped up into
the performance data files that describe the machine's cooling
capacity as a function of the heat exchanger loop inlet conditions.
I suppose that if you had such data for a machine that used ammonia
as its refrigerant then you could reasonably model an ammonia based
hot-water fired chiller with it.<br>
<br>
The difficulty with changing the working fluid in the cooling
loop, heating loop, or chilled loop to ammonia is that ammonia
properties are not very constant over the temperature range that you
would likely be working with. Type107 (and nearly all other TRNSYS
components) assume that specific heat and density of the working
liquid is constant so you have to be careful which fluids you
specify.<br>
kind regards,<br>
David<br>
<br>
<br>
<div class="moz-cite-prefix">On 5/7/2015 5:18 AM, salima adjiri
wrote:<br>
</div>
<blockquote
cite="mid:CAMDA00ufGBALPJoZ+NKda6OZ8Jrm8Z7mvX-K=heNkJLF24EtBA@mail.gmail.com"
type="cite">
<div dir="ltr">Hi,
<div>I want to know if we can change proprities of coolling
fluid in type107. </div>
<div>we want to replace water by ammonia.</div>
<div><span style="font-size:12.8000001907349px">kind regards,</span><br>
</div>
</div>
<br>
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<pre class="moz-signature" cols="72">--
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
Madison, WI 53703 USA
P:+1.608.274.2577
F:+1.608.278.1475
<a class="moz-txt-link-abbreviated" href="mailto:d.bradley@tess-inc.com">d.bradley@tess-inc.com</a>
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