[TRNSYS-users] type665-2 . heat pump -

[David BRADLEY via TRNSYS-users]

Amirreza,

  Type665 models an on/off single stage heat pump. If you need to 
maintain a 4C temperature drop across the air side then you would need 
to modulate the flow rate of air across the evaporator. Please note that 
this is not a simulation issue; this is a real life issue when using 
single speed compressor heat pumps in system. There are now variable 
speed compressor heat pumps on the market that can modulate their 
internal compressor speed to meet an outlet temperature or to maintain a 
temperature difference across either the evaporator or the condenser and 
we have written some models for TRNSYS of them. They are, however, 
written for use in Trnsys17.

kind regards,

  David



On 03/09/2017 09:45, Amirreza Heidary via TRNSYS-users wrote:
> I'm using a heat pump (type 665-2). The outlet temperature of 
> evaporator coil is about 4 C . I like to have just 4 C temperature 
> drop for air. How I couls specifiy it? is there any ay to control the 
> outlet temperature of air ?
> Thank you
>
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
> *amirrezaheidary*
> /master student of energy systems Engineering/
> /Sharif university of technology/
> /Tehran-Iran/
> /E-mail address/:
>
>     heidari at energy.sharif.edu <mailto:heidari at energy.sharif.edu>
>
>     a <mailto:sm_mousavi at pwut.ac.ir>mirrezaheidarysbu at gmail.com
>     <mailto:mirrezaheidarysbu at gmail.com>
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-- 
***************************
David BRADLEY
Principal
Thermal Energy Systems Specialists, LLC
22 North Carroll Street - suite 370
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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