[TRNSYS-users] air-to-water heat pump - Type 941

[David BRADLEY]

Pouyan,

   Variable speed heat pump models (air-to-air, air-to-water, 
water-to-air, and water-to-water) will be available in an upcoming 
update to the TESS libraries. Because we have not yet set a firm release 
date, models are available individually at the moment. Please contact 
techsupport at tess-inc.com for details if you are interested.

kind regards,

  David


On 08/09/2021 08:41, Pouyan Talebizadehsardari (Staff) via TRNSYS-users 
wrote:
>
> Dear Huseyin,
>
> Thanks for your answer. However, in your paper, you used an air-to-air 
> heat pump; however, as I have a radiator in my system, I need to use 
> an air-to-water heat pump which there is only a single stage type in 
> the TRNSYS TESS library.
>
> Kind regards
>
> Pouyan
>
> *From:*Hüseyin Günhan Özcan <huseyin.ozcan at yasar.edu.tr>
> *Sent:* 09 August 2021 14:27
> *To:* Pouyan Talebizadehsardari (Staff) 
> <Pouyan.Talebizadehsardari at brunel.ac.uk>
> *Cc:* TRNSYS users mailing list at OneBuilding.org 
> <trnsys-users at lists.onebuilding.org>
> *Subject:* RE: air-to-water heat pump - Type 941
>
> Dear Sardari,
>
> You can use two-stage heat pump models to create low, nominal and high 
> stages for the considered heat pump.
>
> We had a publication for a two stage air source heat pump. Pls. see 
> the shared link below.
>
> https://www.sciencedirect.com/science/article/pii/S2210670721000482 
> <https://www.sciencedirect.com/science/article/pii/S2210670721000482>
>
> Best regards,
>
> Dr. Huseyin Gunhan OZCAN
>
> *From:*TRNSYS-users <trnsys-users-bounces at lists.onebuilding.org 
> <mailto:trnsys-users-bounces at lists.onebuilding.org>> *On Behalf Of 
> *Pouyan Talebizadehsardari (Staff) via TRNSYS-users
> *Sent:* Monday, August 9, 2021 12:54 PM
> *To:* TRNSYS-users at lists.onebuilding.org 
> <mailto:TRNSYS-users at lists.onebuilding.org>
> *Cc:* Pouyan Talebizadehsardari (Staff) 
> <Pouyan.Talebizadehsardari at brunel.ac.uk 
> <mailto:Pouyan.Talebizadehsardari at brunel.ac.uk>>
> *Subject:* [TRNSYS-users] air-to-water heat pump - Type 941
>
> Dear All,
>
> I am modelling a house heated by radiators using an air-to-water heat 
> pump. This model is based on user-supplied data files containing 
> catalogue data for the capacity and power based on the inlet water 
> temperature and air to the heat pump. As I understand, for a specific 
> existed heat pump, the system should be tested for several inlet 
> conditions (for example 5 different temperatures of water and air=25 
> case) and then create a new data file including the capacity and 
> power. Am I correct?
>
> My main question is that is it possible to consider additional 
> characteristics of the heat pump in the model such as variable speed 
> compressor so the system can be worked with a lower power when less 
> heat is required for the radiators?
>
> Thanks in advance
>
> Best regards
>
> *********************************************************************************
>
> *Pouyan Talebizadeh Sardari*, BSc MSc PhD AFHEA
>
> Centre for Sustainable Energy Use in Food Chains,
>
> Institute of Energy Futures,
>
> Brunel University London,
>
> Kingston Lane, Uxbridge, Middlesex, UB8 3PH, UK
>
> Email: pouyan.talebizadehsardari at brunel.ac.uk 
> <mailto:pouyan.talebizadehsardari at brunel.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
d.bradley at tess-inc.com

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

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