The influence of magnetic field on heat transfer of magnetic nanofluid in a double pipe heat exchanger proposed in a small-scale CAES system

Abstract

Globally, the integration of renewable energy (which has an intermittent nature) into the power system requires the system operators to improve the system performance to be able to effectively handle the variations of the power production in order to balance the supply and demand. This problem is seen as a major obstacle to the expansion of renewable energy if it is not handled in a suitable way. Efficient electricity storage technology is one of the feasible solutions. The current study proposes Fe3O4/water nanofluid under magnetic field as the secondary fluid in the proposed double pipe heat exchanger before the cavern. The heat of compressed air is absorbed by the secondary fluid and it is stored in an isolation tank. This stored fluid is used to warm up the air that leaves the cavern for expanding in the turbine. The results demonstrated that increasing the mass flow rate of secondary fluid decreases the cavern temperature. Also, the value of convective heat transfer of ferrofluid increases when the volume fraction of nanoparticle as well as magnetic field increases. Furthermore, increasing the volume fraction and magnetic field increases the pressure drop and friction factor of ferrofluid.

Numerical Study of Mixing and Mass Transfer in a Micromixer by Stimulation of Magnetic Nanoparticles in a Magnetic Field

“…Fluid actuation by a ferrofluid in microfluidic devices and micromixers is an expanding research field that offers different approaches to fluid handling. Besides, several attractive studies have been made to drive the application of stimulated MNP in the intensification of mixing and heat and mass transfer processes [8][9][10][11][12][13][14][15]. Even though extensive studies about this issue have been performed, there are limited studies that focused on the numerical modeling of the mixing enhancement by MNP actuation.…”

A magnetic vortex generator for simultaneous heat transfer enhancement and pressure drop reduction in a mini channel

“…On the other hand, numerical simulations can be utilized for a precise discovery of magnetic field effects on thermal and hydrodynamic behavior. In most numerical studies, the magnetic source has been considered to be a magnetic dipole due to the simplicity of the magnetic force calculation . It is also worth noting that the observed heat transfer enhancement in these works has been attributed to the formation of the recirculation zone and the increase of the flow mixing.…”

Application of Nanofluids in enhancing the Thermal Conductivity of Heat Exchangers- A Review

“…Malekan et al [14] numerically investigated the effect of using Fe 3 O 4 -water nanofluid as the secondary fluid under magnetic field in a double pipe heat exchanger. In the adiabatic compressed air energy storage (CAES) system, the air is heated by the secondary fluid and is stored in a cavern.…”