Second law optimization of flat-plate solar air heaters. Part 2: Results of optimization and analysis of sensibility to variations of operating conditions

Entropy generation minimization: The new thermodynamics of finite-size devices and finite-time processes

“…188 Models with radiation-dominated collector and radiator were optimized by De Vos and van der Wel 189 and Götkun et al 190 A more applied line of inquiry concerns the thermodynamic optimization of specific designs of processes and power plants driven by solar heating. Recent examples are the optimization of flat-plate solar air heaters, 191,192 phasechange energy storage, 193 and solar assisted heat pumps. 194 The optimal coupling between solar collectors and Stirling and Ericsson cycles was also documented by Badescu.…”

Exergy, Energy, and Dynamic Parameter Analysis of Indigenously Developed Low-Concentration Photovoltaic System

“…wherėd es =̇d es,el +̇d es,opt +̇d es,Δ sun +̇d es,Δ mod , which includes electrical exergy destruction rate (̇d es,el ) caused by series and shunt resistance losses [15], optical exergy destruction rate (̇d es,opt ) caused by optical losses in LCPV module surface [17,18], thermal exergy destruction rate (̇d es,Δ sun ) caused by temperature difference between LCPV module surface and the sun surface temperature [17][18][19][20], and thermal exergy destruction rate (̇d es,Δ mod ) caused by temperature variation of LCPV module with respect to reference environmental state [19,20]. The electrical exergy destruction rate is given as [15] des,el = OC SC − mp mp .…”

“…The effects of the cell temperature ( ) on -curve of LCPV module is estimated from the proposed model as shown in Figure 10. As the device temperature increases, small increase in short-circuit current is observed; however, the open-circuit voltage rapidly decreases due to the exponential dependence of the saturation current on the temperature as given by (18) [39]. In the actual experiments, similar effect of temperature on open-circuit voltage ( OC ) is observed, and it is found that the OC decreases from 9.86 to 8.24 V with temperature coefficient of voltage ≈ −0.021 V/K under ATC as shown in Figure 9.…”

Energy and exergy analysis of a new flat-plate solar air heater having different obstacles on absorber plates

“…Karsli [17] determined the first and second laws of efficiencies of four types of air heating flat-plate solar collectors. Altfeld et al [23,24] performed an optimization analysis on the net flow of exergy in flat plate collectors for air heating. They found that the collection surface characteristics, especially those of the extended surface, diminished the air flow, thus increasing the net flow of exergy and the thermal efficiency of the device.…”