Temperature-Irradiance Matrix and Determination of Temperature Coefficients of a Monocrystalline PV Module ()
ABSTRACT
Photovoltaic
(PV) modules performance testing and energy rating as described in IEC 61853-1
standard depend on electrical performance parameters (short-circuit current,
open-circuit voltage, maximum-power) of PV modules as a function of temperature
and irradiance. In this work, in order to precisely determine the effects of
temperature on the electrical parameters of a monocrystalline PV module, the
temperature controlled, xenon light based solar simulator system with
irradiance attenuating masks was used. This solar simulator, according to the
IEC 60904-9 standard in terms of spectral match, spatial non-uniformity and
temporal instability has A+A+A+ classes which are two times better than the
standard requirements for a solar simulator to be used in PV module
measurements. Moreover, the thermal chamber used in this work is a closed type
chamber with fast opening door for not allowing the distortion of temperature
uniformity over the surface of PV modules under test. Within about 2 m × 2 m area within 15°C to
75°C temperature interval, the
temperature uniformity obtained for this system is less than 1.0°C which is almost two times better than the IEC
60891 standard requirements (±2.0°C). The temperature and irradiance dependent measurements of the
electrical performance parameters of a mono-crystalline PV module at various
irradiance levels and the evaluation of its temperature coefficients [α (% °C-1), β (% °C-1) and δ (% °C-1)] were done by implementing the interpolation
method described in IEC 60891 standard.
Share and Cite:
Ozcan, B. and Seval, M. (2022) Temperature-Irradiance Matrix and Determination of Temperature Coefficients of a Monocrystalline PV Module.
Open Journal of Energy Efficiency,
11, 108-121. doi:
10.4236/ojee.2022.113008.
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