[TRNSYS-users] Direct expansion solar collector
David BRADLEY
d.bradley at tess-inc.com
Fri Sep 30 09:06:15 PDT 2011
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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