Two-phase simulation of a shell and tube heat exchanger filled with hybrid nanofluid

Abstract

The major purpose of the present research study is to design an efficient heat exchanger filled with hybrid nanofluid numerically by making use Al2O3-Cu-water hybrid nanofluid, FVM and SIMPLEC algorithm. The influences of utilizing ribbed tube and then applying nanofluid are probed. Based on obtained findings usage of inner grooves for tube has an obvious effect on the rise of heat exchanger. The inner grooved heat exchanger with N = 3, P = 12 mm, a = 0.9 mm and q = 50° is introduced as the most efficient inner grooved model filled with nanofluid. Further, it is shown that utilizing nanofluid improves the heat exchanger's energy efficiency. Also one of the important goals of this paper was to choose the optimum grid-mesh (GM) along with the least calculation time as well as the highest accuracy. Due to fulfill this demand, four diverse grid-meshes models were developed. For each of the models, various grids were developed and then checked for the analysis of error percent as well as estimation of the time values. The GM-Four with 930289 nodes is considered to ensure a good agreement in the 137 min. The model with Re=2,000,000 and φCu = 0.10 & φAl2O3 = 0.05 at has the most efficiency among all models.