,
Daily Power Output Increase of Over 3% with the Use of Structured Glass in Monocrystalline Silicon PV Modules
(2006)
Аннотация
Various types of structured glass have been evaluated in terms of
module efficiency and total energy yield. A glass with fine round
pits has been selected as optimum as a result of our evaluation taking
into account efficiency gain, improved energy yield, outdoor performance
and material cost. The benefit from such glass with reduced reflectance
is observed through a nominal power boost of around 1%. The largest
benefit from this glass, however, is obtained when rays arrive to
the front module surface at low incident angles. In this case a power
increase of over 15% can be measured, at the early morning and evening
hours. Overall, this is translated in an increase in a measured daily
energy output of more than 3%, which is a substantial gain in terms
of electricity production per module. The benefit can be even larger
in installations where the inclination of the module is not optimal
as, for instance, on facades. The long-term performance of modules
with structured glass has been evaluated in an outdoor monitoring
station, showing no accumulation of dust in the glass features even
after long periods with complete absence of rains in southern Spain.
