Details

Autor(en) / Beteiligte

• Minea, Alina Adriana

Titel

Pumping power and heat transfer efficiency evaluation on Al2O3, TiO2 and SiO2 single and hybrid water-based nanofluids for energy application

Ist Teil von

• Journal of thermal analysis and calorimetry, 2020, Vol.139 (2), p.1171-1181

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2020

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Nanofluids are new heat transfer fluids obtained by suspending different nanoparticles in a base fluid. This research deals with a complex numerical study on nanofluids heat transfer efficiency and pumping power for a certain fluid mechanics application. For this research, several oxide-based nanofluids and hybrid nanofluids were implemented in a numerical code, in both laminar and turbulent flow, while the thermophysical properties were experimentally evaluated and thus, single phase model was considered as the best option. Results showed an increase in heat transfer efficiency of all nanofluids when the nanoparticles are added to suspensions. On the other hand, the numerical results on pumping power and pressure drop were compared with several theoretical correlations and results are discussed accordingly. As a general outcome, it may affirm that the study of these new heat transfer fluids is mandatory to be accomplished taking into account both the heat transfer augmentation and pumping power. If it correlates data from this study one can say that the best flow behavior can be attained when replacing water with Al 2 O 3 –SiO 2 hybrid nanofluids. Plus, a new coefficient for estimation of nanofluids behavior in solar applications is proposed.