Thermal inertia of flat-plate solar collectors in different radiative regimes

Irradiance Variability Quantification and Small-Scale Averaging in Space and Time: A Short Review

“…Early ground-based analyses have characterized single-site irradiance on time scales ranging from hours to months [20,21], while later studies have often been geared towards increasing temporal resolutions of, e.g., 300 s [22,23], 60 s [24][25][26][27], 20 s [12,28,29], 15 s [30][31][32][33][34][35][36][37][38][39][40], 10 s [10,13,41], 5 s [42,43], 1 s [14,[44][45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61], and occasionally even down to 0.1 s [62], 0.04 s [63], 0.01 s [16,…”

“…the analysis of power spectra and non-linear characteristics of PV power and solar irradiance time series [17,18,44,47,54,55,60,[77][78][79][80][81][82], • the consideration of sunshine number and sunshine stability number to characterize the level and stability of the solar radiative regime [30][31][32][33][34][35][36][37][38][39][40], • the intercomparison of solar irradiance fluctuations and power generation variability of co-located PV plants [26,55,70,83] the estimation of spatial smoothing, including correlation structures of irradiance and PV power, as well as their increments [10,12,13,16,27,41,45,49,51,52,61,68,70,71,[102][103][104][105]…”

Effect of the absorber surface roughness on the performance of a solar air collector: An experimental investigation

“…The thermal efficiency was found to vary between 22% and 40%. Soriga and Badescu [5] highlighted that the thermal inertia of a solar air heater ranged between 0.4 to 0.7. Sun et al [6] presented a mathematical model for SACs by varying the mass flow rate from 0.02 to 0.05 kg/s and solar radiation between 100 and 1000W/m 2 .…”

Experimental Comparison of Flat Plate and Evacuated Tube Solar Thermal Collectors for Domestic Hot Water Preparation in Education Facilities

“…One way to compensate the lower performance of the flat plate solar thermal collectors was proposed by Moss et al [16] through a prototype of an evacuated flat plate solar collector for which an efficiency higher than an evacuated tube by a factor of 1.32 was reported. Soriga and Badescu [17] developed a mathematical model to describe the dynamic behaviour of a flat plate solar collector based on which numerical simulations were performed to assess their thermal capacitance, the results showing a steady-state value of 5.37 kJ K −1 m −2 . Even in the case of evacuated tube solar thermal collectors improvements can be obtained as in the case of a novel evacuated tube solar collector having a parallel flow manifold header with a metal foam heat exchanger [18] presenting a performance enhancement factor ranging from 1.14 to 3.20.…”