The irradiance loss doesn't match after simulation

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leosmi
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01 Feb 2022 00:01 - 03 Feb 2022 00:16 #10560 by leosmi

The irradiance loss doesn't match after simulation was created by leosmi

I have the following losses (there's no shading losses):
Soiling: -5 %
Reflection: -1.693 %
TOTAL: -6.693 %

The total irradiance (year 1) for:
a =: POA front-side irradiance total nominal: 57723.83 kWh
b =: POA irradiance total after shading and soiling: 53909.12 kWh
Loss = 100 - (b/a) = 6,61%

Where's the 0.08%? Am I doing this right? Does the precision is affected by the simulation?

...nce-losses.png

Last edit: 03 Feb 2022 00:16 by pgilman.

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pgilman

03 Feb 2022 00:23 #10566 by pgilman

Replied by pgilman on topic The irradiance loss doesn't match after simulation

Hi Leandro,

I was only able to recover one of the images you inserted in your post. Please attach image files to your post (you can then insert it if you want, but you must first attach the file).

The small difference you see is probably due to rounding and to calculating losses from monthly totals rather than hourly (or subhourly) time steps.

Best regards,
Paul.

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