[TRNSYS-users] Variable Speed Air Source HP in TRNSYS

[David BRADLEY]

Muhammad,

  Can you be a bit more specific about what you mean by "transient 
state" analysis? Type1271 uses a performance map lookup method. Its 
compressor is assumed to vary its speed to maintain a constant outlet 
temperature on the load side. In that the heat pump compressor adjusts 
to the present load requirements it does do a transient analysis. 
However, if you are looking for a component that uses a more first 
principals approach and models the state of the refrigerant in the heat 
pumps heat exchangers, compressors, and expansion valve then I think you 
would need to look to a different Type than 1271.


As a side comment, please note that Type1271 is an air (source) to water 
(load) heat pump, not an air to air heat pump.

kind regards,

  David



On 12/20/2018 07:50, Muhammad Abid via TRNSYS-users wrote:
>
> Hi,
>
>
> I am a new user to TRNSYS from Ulster University. I would be working 
> for my PhD studies on the topic of variable speed air source heat pump 
> . I found this "Type 1271v2" ASHP from TESS library useful for me.
>
>
> I am interested in the transient state analysis of the HP. Is this 
> Type suitable for me or i should use some other software(like EES or 
> Matlab) for the transient state analysis?
>
>
> Best Regards
>
>
>
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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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