[TRNSYS-users] length and witdh from the collector area

[David BRADLEY]

Fernando,
   I think you'd be best off trying different combinations of modules in 
series and in parallel. I do not know of any flat-plate collector models 
that allow you to specify the panel length. Most of them rely on a 
quadratic efficiency curve that is typically experimentally determined 
for a given collector configuration. They do not do first-principals 
computations of the collector fin efficiency equations. If you are 
looking for a reference that will give you information on how to compute 
such things, I would recommend "Solar Engineering of Thermal Processes"
Regards,
  David


On 2/16/2011 04:48, Sancho,Fernando wrote:
>
> Hello TRNSYS-users,
>
> I'm making simulations with plastic collector. Many from the 
> commercial models can be resized, so it's almost free how to 
> configurate the collector area. I would like to find  an optimal 
> distribution, dependent of course on Radiation, temperatures etc..., 
> basically how long and width for a minimum output temperature of  the 
> fluid. Or just what is the best for a certain situation 10m*30m or 
> 30m*10m ?.
>
> I ´ve already done my calculations with Excel and know that longer 
> means higher output temperature but lower energy gain... but with 
> trnsys  it's difficult to face the problem ,
>
> do I take a standard unit and probe around different series und 
> parallel distributions L?
>
> Do type 553 and 559 in TESS TRn17 do that; difference width and length 
> (I didn't find it in the general pdf... and have just occasionally 
> access to TRNSYS17)?
>
> Any advice or experience?
>
> So Thanks a lot!!!!!
>
> Mit freundlichen Grüßen
>
> Fernando Sancho Márquez
>
> PHÖNIX SonnenWärme AG
>
> ____________________________________________
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> Ostendstr. 1
>
> D-12459 Berlin
>
>
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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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