This paper presents a comparison of the energy production in grid-connected photovoltaic systems (GCPPS) from measured and calculated radiation data. The Linke turbidity (TL) factor for the region of Porto Alegre, Brazil, was extracted considering the data of direct solar radiation from the typical meteorological year (TMY). The average annual turbidity value obtained of 4.03 agrees with the wet climate of the region which presents only 17.26% of clear-sky days. There was a difference of 27.5% in the results of the produced energy, which drops to 6.5% when compared with only sunny days in the region, suggesting that the model in the current configuration for this type of estimate is barely adequate.

References

References
1.
Rigollier
,
C.
,
Bauer
,
O.
, and
Wald
,
L.
,
2000
, “
On the Clear-Sky Model of the ESRA—European Solar Atlas Radiation—With Respect of the Heliosat Method
,”
Sol. Energy
,
68
(
1
), pp.
33
48
.10.1016/S0038-092X(99)00055-9
2.
Souza
,
G. K.
, and
Macagnan
,
M. H.
,
2013
, “
Extração de um Ano Típico Para Porto Alegre
,”
Mostra UNISINOS de Iniciação Científica, Editora Casa Leiria
, pp.
964
965
.
3.
Duffie
,
J. A.
, and
Beckman
,
W. A.
,
2006
,
Solar Engineering of Thermal Processes
,
3rd ed.
,
Wiley
,
New York
.
4.
Perez
,
R.
,
Ineichen
,
P.
, and
Seals
,
R.
,
1990
, “
Modeling Daylight Availability and Irradiance Components From Direct and Global Irradiance
,”
Sol. Energy
,
44
(
5
), pp.
271
289
.10.1016/0038-092X(90)90055-H
5.
Karayel
,
M.
,
Navvab
,
E.
,
Ne’man
,
E.
, and
Selkovitz
,
S.
,
1984
, “
Zenith Luminance and Sky Luminance Distributions for Daylight Calculations
,”
Energy Build.
,
6
(
3
), pp.
283
291
.10.1016/0378-7788(84)90060-4
6.
Becker
,
S.
,
2001
, “
Calculation of Direct Solar and Diffuse Radiation in Israel
,”
Int. J. Climatol.
,
21
(
12
), pp.
1561
1576
.10.1002/joc.650
You do not currently have access to this content.