20.500.12556/RUL-124498 Numerical and experimental investigation of the energy and exergy performance of solar thermal, photovoltaic and photovoltaic-thermal modules based on roll-bond heat exchangers This paper presents numerical and experimental energy and exergy performance assessments of solar thermal (ST), photovoltaic (PV) and photovoltaic/thermal (PV/T) modules based on roll-bond heat exchangers having three different channel geometries: serial, parallel and bionic. The validation of a coupled numerical simulation encompassing the thermo-hydraulic and electrical properties shows that 78% of all the data lies within a+/-10% uncertainty. The thermo-hydraulic simulation shows that the lowest outlet-water temperature inside the absorber is for the case of the bionic absorber (average 44.1%°C vs. 46.5%°C for the serial). This geometry is also beneficial when considering pressure losses, since compared to the parallel configuration (average 778%Pa) the bionic has significantly lower pressure losses (average 385%Pa). The simulation of the electrical properties of PV/T with all three absorber types showed the highest average solar-to-electrical efficiency (14.5%) in the case of the bionic absorber compared to the PV/T with parallel and serial absorbers (14.4% and 14.3%, respectively). Finally, a set of experiments using the ST, PV and PV/T2 (the index 2 denotes a PV/T collector variant with a foil thickness of 0.3%mm, compared to the thickness of 0.4%mm for PV/T1, positioned between the absorber and the PV cells) modules showed that the PV module, coupled with a bionic absorber plate, achieves the highest average electrical (PV - 8.5% vs. PV/T2 - 9.9%) and exergy (ST - 4.4% vs. PV - 9.2% vs. PV/T2 - 12.7%) efficiencies. Only in terms of the thermal efficiency, the PV/T is at a disadvantage to the ST (PV/T2 - 33.5% vs. ST - 61.4%) due to the air gap between the front glass and the absorber of the latter module. PV/T photovoltaic solar thermal collectors absorbers heat exchangers exergy PV/T fotonapetost sprejemniki sončne energije absorberji prenosniki toplote eksergija true false false Angleški jezik Slovenski jezik Članek v reviji 2021-01-27 13:09:23 2021-01-27 13:09:30 2022-09-04 03:59:49 0000-00-00 00:00:00 2020 0 0 Str. 1-21 Vol. 210 Apr. 2020 0000-00-00 PreprintDelovna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.383.51(045) 0196-8904 10.1016/j.enconman.2020.112674 17080603 2618919 RAZ_Poredos_Primoz_2020.docx RAZ_Poredos_Primoz_2020.docx 1 F24311B7B7CB8FF669B825B3D8759B9F c0389e922c729a91fed0496f966193a9b65aeae1c5a40aa4ea3c192ebdad54c2 911f1dea-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=140008 https://www.sciencedirect.com/science/article/pii/S0196890420302120?via%3Dihub 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=140007 Fakulteta za strojništvo 0 0 0