[TRNSYS-users] Direct expansion solar collector

[David BRADLEY]

Azly,
  I am not aware of such a component for TRNSYS. I see that some 
research / simulation appeared in the International Journal of Energy 
Research in 2003: "study on a direct-expansion solar-assisted heat pump 
water heating system"  (Y.H. Kuang, K. Sumathy, and R.Z. Wang). My 
approach in TRNSYS would be to seek out a manufacturer who has some 
performance metrics on an available device or to couple an existing heat 
pump model with an existing solar collector model. You will need to be 
careful of what solar collector model you choose however; most solar 
collector models are for glazed collectors and make the simplifying 
assumption that the radiation losses are negligible. I imagine that this 
would not be the case if the collector were being used as the evaporator 
for the heat pump though.
Kind regards,
  David


On 9/30/2011 06:36, Mohamad Azly Abd Aziz (Ir) wrote:
>
> Hi
>
> I wonder whether someone has come-out with heat pump type with direct 
> expansion solar collector/evaporator?.
>
> Regards
>
> Azly
>
>
>
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> TRNSYS-users at cae.wisc.edu
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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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