Flow and Convective Heat Transfer Characteristics of Spiral Pipe for Nanofluids
نویسندگان
چکیده
This paper presents an experimental investigation of convective heat transfer coefficient for nanofluids using spiral pipe heat exchanger. The aim of this study is to investigate experimentally flow and convective heat transfer characteristics of water-based nanofluids flowing through a spiral pipe. The test section consist of spiral pipe with ratio pitch per diameter is 7.0 and mean hydraulic diameter of 30 mm. The straight spiral tube with 1600 mm length is used as the test section. At the inner of spiral pipe installed a circular copper pipe with 10 mm diameter. Measurements of pressure drop and convective heat transfer are carried out for Al2O3, TiO2 and CuO at 1% and 3%, particle volume with pure water. The convective heat transfer coefficient of the nanofluids increases by up to 28% at a concentration of 3 vol. % compared with that of pure water.
منابع مشابه
Fluid flow and heat transfer characteristics in a curved rectangular duct using Al2O3-water nanofluid
In the present research, the laminar forced convective heat transfer and fluid flow characteristics for Al2O3-water nanofluid flowing in different bend (i.e., 180o and 90o) pipes have been investigated numerically in a three-dimensional computational domain using the finite volume technique. The effects of different pertinent parameters, such as the Reynolds number of the duct, volume fraction ...
متن کاملFluid Flow and Heat Transfer of Nanofluids over a Flat Plate with Conjugate Heat Transfer
The falling and settling of solid particles in gases and liquids is a natural phenomenon happens in many industrial processes. This phenomenon has altered pure forced convection to a combination of heat conduction and heat convection in a flow over a plate. In this paper, the coupling of conduction (inside the plate) and forced convection of a non-homogeneous nanofluid flow (over a flat plate) ...
متن کاملNumerical Simulation of Forced Convection of Nanofluids by a Two-Component Nonhomogeneous Model
Nanofluids, in which nano-sized particles (typically less than 100 nm) are suspended in liquids, have emerged as a possible effective way of improving the heat transfer performance of common fluids. In this paper a numerical study is performed to analyze the wall shear stress and heat transfer coefficient of γAl2O3-water nanofluids under laminar forced convection through a circular pipe. It is ...
متن کاملNumerical study of the enhancement of heat transfer for hybrid CuO-Cu Nanofluids flowing in a circular pipe.
A numerical simulation model for laminar flow of nanofluids in a pipe with constant heat flux on the wall was built to study the effect of the Reynolds number on convective heat transfer and pressure loss. The investigation was performed for hybrid nanofluids consisting of CuO-Cu nanoparticles and compared with CuO and Cu in which the nanoparticles have a spherical shape with size 50, 50, 50nm ...
متن کامل