Numerical model for the thermal yield estimation of unglazed photovoltaic-thermal collectors using indoor solar simulator testing

Design and Construction of a Sun Simulator for Laboratory Testing of Solar Cells

“…The degree of spectral matching in each wavelength range is given in Table 5. Table 5 Calculated spectral conformity within the inspection range [5][6][7][8] Wavelength range 0.4-0. According to the standard conformity, the following conclusions can be drawn:  Light intensity and the homogeneity of the light is slightly below of what is specified by the standard.…”

“…The applied spectrometer is not suitable to perform absolute light intensity measurements; however, it allows for the spectral curve of the sun simulator and natural sunlight to be recorded. Thus, it is possible to compare the spectrum structure of the sun simulator and natural sunlight, and calculate their spectral conformity [5][6][7][8]20]. The measured spectral curves of the sun simulator and natural sunlight are shown in Figure 12.…”

“…and Kenny et al [20]. Figure 12 Spectral structure of the sun simulator and natural sunlight Table 6 Actual spectral conformity within the inspected wavelength ranges [5][6][7][8] The rate of the measured spectral conformity is always within the 40% -200% range assigned to a class C sun simulator, hence the desired spectral structure can be provided [10,11]. The unexpected correctness of the lowest wavelength interval is caused by a slight shift in the intensity peak of the blue LED lights, therefore the application of UV dominant LED units may not be necessary.…”