Yazar "Jasim, Othman Mohammed Jasim" seçeneğine göre listele

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    Closed-loop aluminium oxide nanofluid cooled photovoltaic thermal collector energy and exergy analysis, an experimental study
    (Elsevier, 2022) Jasim, Othman Mohammed Jasim; Selimli, Selcuk; Dumrul, Hakan; Yilmaz, Sezayi
    PV/T collector cooling was studied experimentally regarding the energy and exergy analysis by Al2O3 nanofluid circulation which is in two different flow patterns. A 20 W polycrystalline PV module was used as a comparison module. Identical PV modules were used for the construction of PV/T collectors, too. PV/T-A collector model was created with the PV module, a copper coil tube was the nanofluid circulated was placed to the backside of it. A PV/T-B collector was made up by placing the Al2O3 nanofluid circulating polyamide channel structure on the backside of the PV module. A 50 W monocrystalline PV module was used to supply power to the circulation pump and heat exchanger fans to provide energy independence from mains electricity. PV/T-A and PV/T-B collectors exposed to 792.83 W/m(2) solar radiation equivalent 121.3 W solar power were cooled 28.94% and 48.54% better regarding the PV module. Electrical power outputs are 5.8 W, 8.13 W, 10.34 W for the PV module, PV/T-A, and PV/T-B collectors. Electrical gaining from the PV/T-A and PV/T-B collectors increased 40.17% and 78.27% by cooling. Thermal gaining from PV/T-A and PV/T-B collectors are 42.8 W and 53.39 W. First and second law efficiencies were determined as 4.78%, 42%, 52.52%, and 5.01%, 7.35%, and 9.42% for PV module, PV/T-A, and PV/T-B collectors. Enhancement in solar utilization with PV/T-A and PV/T-B collectors are 45.13 W, and 57.93 W and proportionate equivalents to 37.2% and 47.75%. Enviro-economics size was estimated as 0.094 tCO(2)/year, and 0.121 tCO(2)/year carbon reduction and equivalent 1.41$ and 1.81$ carbon trade value.
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    EXPERIMENTAL STUDY OF THERMODYNAMIC ANALYSIS OF CLOSED SYSTEM NANOFLUID COOLED PV/T COLLECTORS
    (2022-05) Jasim, Othman Mohammed Jasim
    The requirement for renewable energy and its application in electricity generation is increasing day by day. Solar energy has critical importance among the various types of renewable energy sources. In this thesis, the cooling of PV/T collectors was experimentally investigated with two flow patterned nanofluid circulation in an experimentation system. The experiments were done in the Karabuk city of Turkey in October 2021. A photovoltaic module, that is assigned as a reference, was used to evaluate the enhancement in electrical and thermal performance of two different flow patterned PV/T collectors. PVT collectors were obtained by placing the back side of PV modules and the PV/T collector (PV/T1) has the serpentine and the other (PV/T2) channelled module back side circulation. Solar panel systems are compared according to their first and second law efficiency. Resultantly, the temperature decline of PV/T1 and PV/T2 collectors was 29.49% and 50% compared to the PV module. Electrical power output of the PV/T1 and PV/T2 increased approximately 41% and 78.7% respect to PV module. The thermal power gain from the PV/T1 and PV/T2 collectors are 42.8 W, and 53.39 W. First and second law efficiency enhancement of PV/T1 and PV/T2 collectors are 39.23%, 50.97%, and 2.44%, 4.95% compared to PV module.