[TRNSYS-users] Type 194 Efficiency problem

[David BRADLEY]

Based on that equation, I would think that the efficiency would go to 
zero whenever there is not output from the PV panel (ie every night). It 
is not entirely clear from the picture but are you basing the efficiency 
on the integrated amount of energy produced by the panel? If that is the 
case then the result would go to zero whenever the integrator is reset. 
If an integrator is set to have a -1 integration period then it 
integrates monthly.
kind regards,
  David


On 04/06/2016 15:58, Sandeep Singh Chahal wrote:
>
> Hello TRNSYS user,
>
>
> I am analyzing the efficiency of photo-voltaic panel (type 194) for 
> entire year. It goes to zero after each month which should not be the 
> case. ( check the attached file for results)
>
>
> Equation used for efficiency .... "(eta_system= 
> (E_electric/max(1,E_solar)) )"
>
>
> did anyone else had same issue... Any help will be greatly appreciate 
> thanks!
>
>
>  Thanks,
> Sandeep Chahal
>
>
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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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