Table 1 Soiling relative transmittance (τb), solar weighted transmittance and predicted soiling ratio (rs) for a monocrystalline silicon cell at the indicated sites.

From: Modelling photovoltaic soiling losses through optical characterization

City

Broadband Relative Transmittance (τb)

Solar Weighted Transmittance

Predicted Soiling Ratio (rs)

Chennai, India

0.907

0.904

0.909

El Shorouk, Egypt

0.670

0.659

0.674

Golden (CO), USA

0.970

0.969

0.970

Jaén, Spain

0.943

0.941

0.945

Penryn, UK

0.996

0.995

0.996

San José (CA), USA

0.982

0.980

0.982

Tezpur, India

0.976

0.975

0.977

  1. The wavelength range was from 350 nm to 1100 nm. The relative transmittance is obtained as the ratio of the transmittance of each soiled glass to the transmittance of the clean reference glass. The standard uncertainty associated with the reproducibility of the measurements is estimated to be ±0.005. The values for each site have been obtained as average of the individual measurements shown in Table S2.
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