Numerical investigation on enhancement of heat transfer using rod inserts in single pipe heat exchanger

Abstract

The current study focused on statistically investigating nanofluids' turbulent flow and rate of heat transfer in double pipe heat exchanger with rod inserts. Through the use of numerical simulation, the effects which the various kinds of nanofluids have on the enhancement of heat transfer using finite volume method (FVM) are studied. An application of homogeneous heat flux is made to the tube wall. More so, an examination of the effect of three varying slant angles of rod insert (α = 25°, 30°, 45°) was carried out at varying Reynolds number ranging from 7500 -20000. The statistical results revealed that the coefficient of transferring heat in the tube containing rod inserts is higher than that of the smooth tube. In addition, results also showed that when rod insert are used in double pipe heat exchanger to augment the Nusselt number increases the slant angle. The max value of Nusselt number was demonstrated at the angle 45° of rod insert. Through the use of the rod inserts at (α=45°) and (S = 30mm), the coefficient of maximal skin friction was determined because of the resistance of larger flow. The maximal value of the Performance Evaluation Criteria (PEC) was mentioned in the case of min slant angle of (α = 25°) and the pitch distance of S = 30 mm.

Identifying some regularities of the heat transfer in the welded joint of SUS304 pipe using a numerical approach

“…Using an ANSYS FE model that accounted for strain hardening, it was discovered that the peak residual stress of weld metal was much higher than the yield stress of the parent material. For a dissimilar welded connection between P91 and SS304L steel, the authors [28] used the DHD method to examine the residual stress distribution over the weldment thickness. Weld metal has the lowest residual stress level when ranked from highest to lowest [29].…”

A review of different twisted tape configurations used in heat exchanger and their impact on thermal performance of the system

“…TT is also considered the eddy generator that enhances the HT coefficient [ [14] , [15] , [16] , [17] , [18] ]. The goal of the current study is to provide the necessary information of twisted tape geometry fixed in the tube for the thermal enhancement of the system [ [19] , [20] , [21] , [22] , [23] ]. The cyclic representation of HT in heat pipe is represented in Fig.…”

Improved Heat Transfer in W-Baffled Air-Heat Exchangers with Upper-Inlet and Lower-Exit

“…Moreover, some studies contributed to the nanometer and other fluids for different ducts of various application systems. For example, see Kolsi [31], Rashad [32], Ghalambaz et al [33], Ismael [34], Selimefendigil [35], Ashham et al [36], Alsabery et al [37], and Hajjar et al [38]. Other predictions have treated both heat and mass transfer in different flow conditions using nuerical and experimental methods.…”