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Thermodynamic analysis on using titanium oxide/oil nanofluid integrated with porous medium in an evacuated tube solar water heater
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Thermodynamic analysis on using titanium oxide/oil nanofluid integrated with porous medium in an evacuated tube solar water heater
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Journal Article
Thermodynamic analysis on using titanium oxide/oil nanofluid integrated with porous medium in an evacuated tube solar water heater
2023
Overview
Solar water heaters are one of the most popular applications of renewable energy. So, many modifications have been performed on them to boost their performance. The novelty of the current experimental work is to simultaneous employment of porous medium inside water reservoir and oil-based nanofluid as circulating fluid. Accordingly, TiO
2
nanoparticles with two concentrations of 0.2 and 0.4 mass% were dispersed in engine oil as-based fluid. As results, when concentration of 0.4 mass% TiO
2
in engine oil is integrated with porous medium, the temperature is increased by 6.4 °C. This temperature enhancement leads to boost the thermal efficiency more than 41%. Moreover, thermal efficiency increments of 5.4% and 19% are occurred, for the cases of employing porous media and simultaneous application of 0.4 mass% TiO
2
/oil with porous media, respectively. The exergy efficiency was assessed by means of the modified approach. Accordingly, utilization of only porous medium creates 19.6% improvement in the exergy efficiency of the system. Furthermore, the entropy generation in the system was calculated, too, and the base case showed 14.7% more entropy generation compared with TiO
2
/oil integrated with porous medium. Lastly, a comparative study has been done to show the superiority of this work in comparison with the others.
Publisher
Springer International Publishing,Springer,Springer Nature B.V
Subject
