Re: [TRNSYS-users] Type 194 Efficiency problem

[Sandeep Singh Chahal <chahals@uab.edu>]

Hi David,

Thanks! I got it.

Sandeep

    

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From: David BRADLEY <d.bradley@tess-inc.com>
Sent: Thursday, April 7, 2016 1:17 PM
To: TRNSYS users mailing list at OneBuilding.org; Sandeep Singh Chahal
Subject: Re: [TRNSYS-users] Type 194 Efficiency problem

 

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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