An alternative methodology to treat solar radiation data for the optical efficiency estimate of different types of collectors

Comparison of sodium and KCl-MgCl2 as heat transfer fluids in CSP solar tower with sCO2 power cycles

“…The η opt depends on the solar Azimuth and Zenith angles and was calculated using Solar Pilot starting from the on-design calculations. For the KCl-MgCl 2 case, the determined values is similar to the ones as-sumed in a previous work which were calculated using DELSOL3 (Binotti et al, 2014). The two efficiency maps are reported in Fig.…”

Concentrating solar power for seawater thermal desalination

“…This non-normal orientation towards the incoming sunlight is the primary optical loss for LFR, and the loss is incurred both with respect to the transversal plane (perpendicular to the axis of the collector) and longitudinal plane (parallel with the axis of the collector). DNI eff is conventionally determined from the following relationship [35]:…”

“…Where K_⊥(Θ_⊥) and K_∥(Θ_∥) are transversal and longitudinal correction factors respectively and depend strongly on the position of the sun with respect to the collector [35]. They are dependent on the sun's measured height angle (Θa) and sun's direction angle (θd).…”

“…The transversal K_⊥(Θ_⊥) and longitudinal K_∥(Θ_∥) correction factors are usually described respectively as a function of the transversal (θL) and longitudinal (θII) solar incidence angles on the collector [35]. θL and θII are computed from the measured(Θa) and (θd) solar angles using the following equation:…”

Fourier sampling of sun path for applications in solar energy

“…However, the optimisation of heliostat fields requires many thousands of runs [4], and the computational overhead of this sampling becomes a serious issue [5]. Moreover, the sampling with one-hour interval does not lead to a clear understanding of how different positions of the sun contribute to the annual output [6].…”