Experimental Investigation of Heat Transfer Enhancement in Plate Heat Exchangers Using Hybrid Nanofluids
Authors-Dr. Arun Jacob, Sreeraj S, Razeek A, Renjith T
Keyword-Plate Heat Exchanger, Hybrid Nanofluid, Heat Transfer Enhancement, Pressure Drop, Graphene-TiO₂, MWCNT-ZnO, Thermal Performance
Plate heat exchangers are extensively used in thermal systems because of the compactness and high thermal efficiency of such apparatus. In this experiment, the thermal-hydraulic behavior of the corrugated plate heat exchanger is examined based on hybrid nanofluids. Three kinds of hybrid nanofluid are prepared consisting of the following: Graphene-TiO₂/water, MWCNT-ZnO/water-EG, and MWCNT-Al₂O₃/water with volume fractions ranging between 0.05% to 2.0%. These nanofluids are investigated in the range of Re equal to 100-5000. From the results, it can be concluded that hybrid nanofluids improve significantly heat transfer performance when being compared with base fluids. For instance, at the volume fraction of 0.5%, Graphene-TiO₂/water hybrid nanofluids improve up to 21.6% the heat transfer coefficient. Also, the convective heat transfer coefficient increased by 17% in MWCNT-ZnO hybrid nanofluid at the same volume fraction. But, the penalty of pressure drop and increased friction factor is observed with rising nanoparticle concentrations. PEC (performance evaluation criterion) index is utilized to determine the efficiency of hybrid nanofluids.
Doi-[https://doi.org/10.5281/zenodo.22040263]