Soiling losses calculation for snow

[Swonno]

Hello PVSyst team,

 

I would like to adjust and forecase snow soililng losses,

 

I am planning to use Korea Weather forecast data for 20 years that Korea government provide.

So, In this phase can i know how the soiling losses is calcuted or formula?

I'll know annaully snowing days but I don't know how to adjust and convert to soiling losses for PVSyst.

For example I know one of the korea site it snows 29 days per a year and how i can adjust to soiling losses ?

(And the snow soiling losses will be combined with dust soiling losses ? I mean they are combined like plus? or just which more higher losses will be adjusted only itself?)

 

Pls help. Thanks 

[Agnes Bridel]

At the moment, there is no specific snow model in PVsyst. The recommended way to account for snow coverage, is to use the monthly soiling losses. You need to estimate these monthly values outside PVsyst, either by simply using weather data on snow coverage, or by using some more sophisticated snow coverage modeling. This will then be considered as an irradiance loss. 

Best, 

[Swonno]

3 hours ago, Agnes Bridel said:

At the moment, there is no specific snow model in PVsyst. The recommended way to account for snow coverage, is to use the monthly soiling losses. You need to estimate these monthly values outside PVsyst, either by simply using weather data on snow coverage, or by using some more sophisticated snow coverage modeling. This will then be considered as an irradiance loss. 

Best, 

Thank you for the comment,

I understand calculating and adjusting snow case in soiling is hard.

If you have any guide line for adjusting soiling losses without snow case for various cases, pls let me know such like factory area and island, ocean, salt farm.

 

Thanks.