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Knut Erik,<br>
Very interesting. I would think that the data-file format would also
have had to change since I imagine that the device would require
different fractions of full load power as the compressor speed
modulates. <br>
Best,<br>
David<br>
<br>
<br>
<a class="moz-txt-link-abbreviated" href="mailto:knut.erik.enerstvedt@niva.no">knut.erik.enerstvedt@niva.no</a> wrote:
<blockquote
cite="mid:OF0E6D72FC.2021FEA0-ONC12576F2.0031BD97-C12576F2.003A500B@niva.no"
type="cite"><br>
<font size="3">Mavi and David,</font>
<br>
<br>
<font size="3">A heat pump with a variable speed compressor can fix
the
outlet temperature, but they are not very common yet. I once thought I
had to model such a heat pump, so I made some modifications to Type 668
water-water heat pump to include a set point on outlet load
temperature,
similar to Type 666 water cooled chiller which has a set point
temperature
on the chilled water stream. It was hard to find data on part load
performance,
however. Later I found out that I did not need this model after all.</font>
<br>
<br>
<font size="3">Mavi, let me know if you need more information about
the
modified heat pump component.</font>
<br>
<br>
<br>
<font size="3">Best regards,</font>
<br>
<font size="3">Knut Erik Enerstvedt</font>
<br>
<font size="3"> </font>
<br>
<br>
<font size="3">>Mavi,<br>
> Heat pumps can't really do that - they are either on and operating
at whatever capacity they have available given the entering water
>conditions
or they are off. Unless they are multistage heat pumps, they can't load
follow and provide a constant outlet temperature >regardless of the
inlet temperature. In reality and in simulation, you would have to look
for a method of actually doing that. One thing >you could try is to
have a bypass valve upstream of the heat pump, oversize the heat pump
so
that it can always heat or cool the >liquid enough and then divert
some
of the upstream liquid around the heat pump and mix it back in
downstream
like a tempering >valve.<br>
>Best, <br>
> David<br>
<br>
<br>
>Mavi Cambronero Vázquez wrote: </font>
<br>
<font size="3">>Hi everybody!!</font>
<br>
<font size="3"> </font>
<br>
<font size="3">>I´d like to get a fixed outlet temperature from a
water-water heat pump. Do you know how to do it???</font>
<br>
<font size="3"> </font>
<br>
<font size="3">>Thank you!!!</font><font face="sans-serif" size="2"><br>
------------------------------------------------------------------------------------------------------------<br>
Meld deg på vårt nyhetsbrev på </font><a moz-do-not-send="true"
href="www.niva.no"><font face="sans-serif" size="2">www.niva.no</font></a>
</blockquote>
<br>
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