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

[Pouyan Talebizadehsardari (Staff)]

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

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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