[TRNSYS-users] Variable speed heat pump compressor heat pump inTRNSYS

[David BRADLEY]

Muhammad and Hamidreza,

  Hamidreza's approach is the correct one, I think. I have written 2 
variable speed heat pump models, which will be included in a new TESS 
Libraries eventually. One is an air-to-air heat pump and the other is an 
air-to-water heat pump. I do not have a water-to-air version written. 
They can be made available for sale as individual components if you are 
interested. Both of the components essentially use the same methodology 
that Hamidreza described.

kind regards,

  David


On 01/27/2019 09:56, hamidreza.esfehani via TRNSYS-users wrote:
>
> Hi Muhammad,
>
> That was actually part of my PhD research project.
>
> In Trnsys you have the possibility to apply single and 2-stage heat 
> pumps models (Type 927, 1221) but as far as I know no type for 
> variable speed heat pump is yet implemented.
>
> I would recommend you to use a datasheet of operation points of 
> variable speed heat pump from any manufacturer and use Type 
> Multi-Dimensional Data Interpolation (Type 581) to generate an 
> interactive interpolation depending on the parameters you want to 
> study such as (Compressor Frequency, outlet water temperature and etc).
>
> You can then connect your heating/cooling load model to your heat pump 
> model.
>
> However to have a start point you could start with Type 1221 and 
> implement a simple load control strategy for it to seen how it performs.
>
> Bests,
>
> Hamidreza Heidar Esfehani
> Wissenschaftlicher Mitarbeiter|Research Associate
>
> Leibniz Universität Hannover
> IEK Abt.Gebäudetechnik
> Herrenhäuser Str. 8
> 30419 Hannover
>
> Telefon : +49 (0)511 762 3811
> Fax : +49 (0)511 762 3016
> hamidreza.esfehani at iek.uni-hannover.de
>
> www.iek.uni-hannover.de/gebaeudetechnik
>
> *From: *Muhammad Abid via TRNSYS-users 
> <mailto:trnsys-users at lists.onebuilding.org>
> *Sent: *Sunday, January 27, 2019 4:10 PM
> *To: *trnsys-users at lists.onebuilding.org 
> <mailto:trnsys-users at lists.onebuilding.org>
> *Cc: *Muhammad Abid <mailto:Abid-M at ulster.ac.uk>
> *Subject: *[TRNSYS-users] Variable speed heat pump compressor heat 
> pump inTRNSYS
>
> Hi Dear TRNSYS user,
>
> I will be using TRNSYS for my research work on variable speed heat 
> pump compressor for demand side management and network stability.
>
> I have started learning TRANSYS since last two months and have got 
> some basic ideas.I wish to start in systematic way.  Once I look into 
> the different heat pump mathematical models, get confused i.e 
> Geometrical or Physical model, semi empirical model(including the 
> lumped model), empirical model. I am not sure which model should i 
> select at this early stage which should be useful to achieve the 
> objectives associated with the topic at later stage.
>
> I need some suggestions and a simple start point which can lead me to 
> go through my PhD studies? Furthermore as a part of my  work i need to 
> do some experiments with the test bed. So what parameters should i 
> expect from the test bed?
>
> Best Regards
>
> Ulster University
>
> Muhammad Abid
>
> PhD Researcher
>
> Centre for Sustainable Technologies, Room 26B23
>
> Belfast School of Architecture and the Built Environment
>
> Faculty of Computing, Engineering and the Built Environment
>
> Ulster University, Jordanstown Campus, United Kingdom
>
> T: +44-(0)-2890366413
>
> E: abid-m at ulster.ac.uk
>
> W:_ www.ulster.ac.uk_
>
> W: www.cst.ulster.ac.uk <http://www.cst.ulster.ac.uk/>
>
>
>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
3 North Pinckney Street - suite 202
Madison, WI  53703 USA

P:+1.608.274.2577
F:+1.608.278.1475
d.bradley at tess-inc.com

http://www.tess-inc.com
http://www.trnsys.com

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