Appendix A : Irelands Solar Radiation

Dublin Airport Monthly Solar Irradiation

(source Photovoltaic Geographical Information System (PVGIS) http://re.jrc.ec.europa.eu/pvgis)

PVGIS Estimates of long-term (10 years) monthly averages

Location: 53�26'10" North, 6�15'53" West, Elevation: 67 m a.s.l.,

Chart 1

Image adapted from http://re.jrc.ec.europa.eu/pvgis

Solar radiation database used: PVGIS-classic

Optimal inclination angle is: 38 degrees

Annual irradiation deficit due to shadowing (horizontal): 0.0 %

Table 1

H_h: Irradiation on horizontal plane (Wh/m²/day)

H_opt: Irradiation on optimally inclined plane (Wh/m²/day)

H(90): Irradiation on plane at angle: 90deg. (Wh/m²/day)

I_opt: Optimal inclination (deg.)

T_D: Average daytime temperature (�C)

T_24h: 24 hour average of temperature (�C)

N_DD: Number of heating degree-days (-)

Chart 2

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Chart 5

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Mean daily duration of bright sunshine (hours) by month for Ireland

Chart 6

Image adapted from met.ie, "Mean daily duration of bright sunshine (hours)"

Hourly Average Solar Radiation for Dublin Airport - Seasonal Variations (July v's January)

Chart 7

Image created from data downloaded from http://re.jrc.ec.europa.eu/pvgis

Hourly Average Solar Radiation for Dublin Airport - Dual Tracker System Impact

Chart 8

Image created from data downloaded from http://re.jrc.ec.europa.eu/pvgis

** Dual tracker system increases the Solar Radiation capture by 30%

Irradiation - Comparison of Cork, Ireland and Dortmund, Germany

Chart 9

(source Photovoltaic Geographical Information System (PVGIS) http://re.jrc.ec.europa.eu/pvgis)

Images adapted from http://re.jrc.ec.europa.eu/pvgis