Effects of Using Sun-shape Turbulator on Thermal-Hydraulic Performances of a Heat Exchanger Filled with Nanofluid

The main aim of the present article is to produce a smaller and cheaper heat exchanger with similar performance. The second goal of this investigation is to study the effects of using oil-based nano-fluids in a refinery heat exchanger. The third objective of this paper is to compare the results which are obtained from the singe- and multi-phase approaches. To fulfill this demand, ANSYS-Fluent and Aspen-HYSYS softwares are employed. Also, MgO-SAE10 nanofluid is studied in this paper using two-phase approaches. The THPEC, Thermal-Hydraulic Performance Evaluation Criteria, and specific heat flux, q", have major roles in this paper. In the second step, the authors try to achieve an efficient model which has not only the THPEC > 1 but also the maximum value of q". According to obtained results, the usage of nanofluid and turbulators can enhance thermal-hydraulic performances of the heat exchanger significantly. Furthermore, it is concluded that by employing nanofluid and turbulators, the cost of manufacturing refinery heat exchangers are sharply reduced. A heat exchanger filled with MgO-SAE10 nanofluid and equipped with SOL-shaped turbulators with =0.5mm, =5.8mm and =5.8mm is suggested as the best configuration, which can improve the thermal characteristics of heat exchanger about 62% in this work.