Heat Transfer in a Loop Heat Pipe Using Fe₂NiO₄-H₂O Nanofluid

Abstract

Abstract. Nanofluids are stable suspensions of nano fibers and particles in fluids. Recent investigations show that thermal behavior of these fluids, such as improved thermal conductivity and convection coefficients are superior to those of pure fluid or fluid suspension containing larger size particles. The use of enhanced thermal properties of nanofluids in a loop heat pipe (LHP) for the cooling of computer microchips is the main aim of this study. Thus, the Fe2NiO4-H2O served as the working fluid with nanoparticle mass concentrations ranged from 0 to 3 % in LHP for the heat input range from 20W to 60W was employed. Experimental apparatus and procedures were designed and implemented for measurements of the surface temperature of LHP. Then, a commercial liquid cooling kit of LHP system similar as used in experimental study was installed in real desktop PC CPU cooling system. The test results of the proposed system indicate that the average decrease of 5.75 o C (14%) was achieved in core temperatures of desktop PC CPU charged with Fe2NiO4-H2O as compared with pure water under the same operating conditions. The results from this study should find it's used in many industrial processes in which the knowledge on the heat transfer behavior in nanofluids charged LHP is of uttermost importance.

A Review on Development of Liquid Cooling System for Central Processing Unit (CPU)

“…Gunnasegran et al, [11] Fe2NiO4 -water An average decrease of 5.75 o C (14%) was achieved in core temperatures of desktop PC CPU using Fe2NiO4-H2O Sarafraz et al, [12] Liquid gallium CuO-water Results demonstrated that both coolants present a higher thermal performance in comparison with water. Gallium showed superior thermal performance compared to nanofluid.…”

“…From the literature reviews, it is confirmed that a higher concentration of nanofluid has better heat transfer performance. Unfortunately, most of the studies just use a small percentage of nanofluid approximately <5% concentration in the liquid system [10,11,22]. One of the considerations of the selected concentration is the stability of nanofluid.…”