The Nusselt number, overall heat transfer, and convective transfer coefficients of glycerol-water-based Cu nanofluids flowing in a parallel flow double pipe exchanger are estimated using CFD analysis. Single-phase fluid approach technique is used the Ansys 19.0 workbench was to create model. Heat tests with at three rates (680<Re<1900) carried out laminar developing zone. For testing, 500...

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Microchannel heat exchangers (MCHXs) are now widely used in the HVAC&R industry. Similar to tube-fin heat exchangers used mainly in the indoor units, the innovative variable geometry microchannel heat exchanger will further reduce its compact size and enhance its performance. Variable geometry refers to a heat exchanger with different tube and fin surfaces within the same core with one or more ...

In this study, the effect of the tube material on the thermal stress generated in a vertical shell and tube heat exchanger is investigated. Shell and tube heat exchangers are the most common heat exchangers used in industries. One of the most common failures in these exchangers in the industry is the tube failure at the junction of the tube to tubesheet. When the shell side and the tube side fl...

With the growing need for more energy, it is imperative to design efficient heat exchangers that are simpler, cheaper manufacture, have higher transfer rates, and low in pressure drop. One of these double tube exchanger used many industries. From past present, caught attention researchers because their simplicity wide range applications. This review paper contains a critical analysis impact dif...

The entropy generation analysis of fully turbulent convective heat transfer to nanofluids in a circular tube is investigated numerically using the Reynolds Averaged Navier–Stokes (RANS) model. The nanofluids with particle concentration of 0%, 1%, 2%, 4% and 6% are treated as single phases of effective properties. The uniform heat flux is enforced at the tube wall. To confirm the validity of the...

This study numerically investigates heat transfer augmentation using water-based Al₂O₃ and CuO nanofluids flowing in a triangular cross-sectional duct under constant heat flux in laminar flow conditions. The Al₂O₃/water nanofluids with different volume fractions (0.1%, 0.5%, 1%, 1.5%, and 2%) and CuO/water nanofluids with various volume fractions (0.05%, 0.16%, 0.36%, 0.5%, and 0.8%) are employ...

Natural circulation loops with double pipe heat exchangers at heating and cooling ends have a potential to be used in the refrigeration systems as an alternative suction line exchangers. The transfer capability of such natural depends on geometrical parameters well thermophysical properties working fluid. This study aims investigate effect water-ethylene glycol mixture based Fe3O4 nanofluids (0...

In this paper, first the governing parameters characterizing low-finned tubes are reviewed. Second, the more important of the available performance correlations are compared with the available experimental data. The most reliable one can be employed to develop a pressure drop relationship, which has already been used in an algorithm for exchanger sizing. Also a means for the identification of a...