[TRNSYS-users] Comparing residential air conditioner and air-cooled chiller

[Janne Paavilainen]

Hi!

For what it's worth:

I once used standard Type52a for outside coolers so that I "black box 
calibrated" the heat exchanger parameters so that the characteristics 
would match those of real products of some Fincoil dry coolers, even 
though the Type52a is not meant for that heat exchanger geometry. 
Fincoil had a simulation program for their products where I could vary 
liquid mass flow rates and temperatures. With it I made a 
multi-point-calibration for varying liquid mass flow rate, inlet 
temperature and ambient temperature by tweaking the Type52a parameters 
until the performance matched in the expected operating range.

This was done in TRNSYS15 and I remember having some psychrometrics 
subroutine trouble in Type52a.

Kind Regards,
Janne

-- 
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Janne Paavilainen 
MSc, Doktorand
Forskare inom Energi och miljöteknik
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Solar Energy Research Center SERC
Högskolan Dalarna
SE-781 88 Borlänge
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tel +46 (0)23 778728
fax +46 (0)23 778701
e-mail: jip at du.se
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www.serc.se
www.eses.org
www.uni-kassel.de/fb15/ite/solar/solnet/
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knut.erik.enerstvedt at niva.no wrote:
> Dear TRNSYS users,
>
> I have a simulation project where I want to compare usage of chilled water
> to cool a house instead of a traditional residential air conditioner. The
> water, after being used for cooling during daytime and thereby heated up,
> is recooled the following night when the outside air temperature is lower
> than at daytime and by using an air-cooled chiller. I wish to compare the
> two systems, chiller at nighttime vs. air conditioner at daytime,  when it
> comes to energy efficiency and power consumption. Therefore, I need the air
> conditioner model and the chiller model to be as similar as possible
> regarding capacity and power consumption when they are operating under the
> same conditions. I have looked into the TESS Types for modelling air-cooled
> chiller and residential air conditioner, but these are all based on catalog
> performance data and I generally think it is hard to find all the data I
> need to set up two comparable models. My question is: Does anyone know a
> website where I easily can find the data I need, or perhaps someone knows
> of a simpler, but yet realistic, way of comparing the two cooling
> approaches, using alternative component models. Again, the important aspect
> is to relate removal of energy from air or water to efficiency depending on
> outside air conditions.
>
> All ideas and suggestions about this will be highly appreciated.
>
> Kind regards,
> Knut Erik Enerstvedt
>
>
>
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