Knut Erik,
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.
Best,
David
knut.erik.enerstvedt@niva.no wrote:
Mavi and David,
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.
Mavi, let me know if you need more information about
the
modified heat pump component.
Best regards,
Knut Erik Enerstvedt
>Mavi,
> 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.
>Best,
> David
>Mavi Cambronero Vázquez wrote:
>Hi everybody!!
>I´d like to get a fixed outlet temperature from a
water-water heat pump. Do you know how to do it???
>Thank you!!!
------------------------------------------------------------------------------------------------------------
Meld deg på vårt nyhetsbrev på www.niva.no
--
***********************************************************************
Thermal Energy System Specialists (TESS), LLC
David BRADLEY 22 N. Carroll Street - Suite 370
Partner Madison, WI 53703
USA
P: +1.608.274.2577
F: +1.608.278.1475
E-mail: bradley@tess-inc.com
Web Pages: http://www.tess-inc.com and http://www.trnsys.com
***********************************************************************
|