Abstract
The impact of overall heat transfer coefficient and the pressure drop on performance of a counter flow helical tube heat exchanger with Cu-Ni-water hybrid nanofluid are computed. To evaluate heat transfer rate for a mix of base fluid with copper and nickel nanoparticles of volume concentrations 0.02,0.04 and 0.06 are added. To control the sedimentation of nanoparticles in the base fluid Ultrasonication followed by magnetic stirrer method is used. In this work experiments are conducted with to enhance heat transfer rate rather than stability of nanoparticles. Experiments are conducted for different concentrations and coil turns under laminar flow regime. The results are shown that 0.04 % vol of Cu-Ni/H2O with 12 turns is more predominate foe food processing applications due to its consistency in maintaining a constant temperature.
Highlights
In this fast-growing world there is a huge demand for different food products
In this research work experiments are performed on counter flow shell and helical coil heat exchanger with CuNi-water hybrid nanofluid to improve heat transfer rate
Experiments are conducted on shell and helical coil tube heat exchanger (SHCHE) with Cu-Ni/water hybrid nanofluid for different volume concentrations and geometrical parameters of copper coil under laminar flow condition
Summary
In this fast-growing world there is a huge demand for different food products. Due this huge demand many food processing industries are preparing and preserving the liquid and solid food products to meet the requirement. The heat transfer rate and the pressure drop characteristics of double tube helical coil heat exchanger was inspected by usingCuO-water and TiO2-water single type nanofluids under laminar flow conditions [20]. It is evident that the overall heat transfer coefficient of single type nanofluids and water enhanced with increase inflow rate and De. Experiments were conducted to study a mixed flow convective heat transfer of nanofluids in a helical straight tube with at constant wall temperature for Re < 5000 [21,22]. The effect of surfactants on the thermal performance of the Aluminium-silver (Al-Ag) hybrid nanofluid at incessant wall temperature under very lowflow ratesinside the helical coil heat exchanger was investigated [29,30] They added anionic and Sodium Dodecyl sulphate (SDS) and non-ionic Poly Vinyl Pyrrolidone (PVP) surfactant with different concentrations to improve thermal performance. Μ Dynamic viscosity (Pa-s) h Heat transfer -coefficient (W/m2 k) U Overall heat transfer coefficient (W/m2 k) t thickness of copper tube (mm)
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