Abstract
This work is concerned with the design and performance evaluation of a shell and double concentric tubes heat exchanger using Solid Works and ANSY (Computational Fluid Dynamics).
 Computational fluid dynamics technique which is a computer-based analysis is used to simulate the heat exchanger involving fluid flow, heat transfer. CFD resolve the entire heat exchanger in discrete elements to find: (1) the temperature gradients, (2) pressure distribution, and (3) velocity vectors. The RNG k-ε model of turbulence is used to determining the accurate results from CFD.
 The heat exchanger design for this work consisted of a shell and eight double concentric tubes. The number of inlets are three and that of outlets are also three for all the fluids that pass through the heat exchanger.
 A comparison was made for the numerical and experimental results and it was found that the percentage error for the hot oil outlet temperature was (6.8%) and the percentage error was (- 21%) for cold water outlet temperature.
Highlights
The shell-and-double concentric-tube heat exchanger is one of the devices to transfer heat
The analysis showed that there is a difference between temperatures values computed from the experiment and the simulation by ANSYS 13.0
The main objective of this research project is to study the designed heat exchanger, with the use of the Kern’s technique, using the software of Computational Fluid Dynamics (CFD) by simulation the 3D geometry for counterflow smooth tube heat exchanger using hot oil that passes through the shell side and the inner tube side, while the cooling water passes counter currently in the annulus between the concentric tubes by using computational fluid dynamic (ANSYSFLUENT 15) software
Summary
The shell-and-double concentric-tube heat exchanger is one of the devices to transfer heat. The main objective of this research project is to study the designed heat exchanger, with the use of the Kern’s technique, using the software of Computational Fluid Dynamics (CFD) by simulation the 3D geometry for counterflow smooth tube heat exchanger using hot oil that passes through the shell side and the inner tube side, while the cooling water passes counter currently in the annulus between the concentric tubes by using computational fluid dynamic (ANSYSFLUENT 15) software. After reaching the required temperature, the oil pump is switched on the oil flow rate is regulated to the desired value (20, 40, and 60 l/min.) to enter to the inner tube side and the shell side in the heat exchanger. The above procedure is repeated with changing inlet temperature and flow rate for the hot oil
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