Investigation of heat transfer enhancement using ferro-nanofluids (Fe₃O₄/water) in a heated pipe under the application of magnetic field

Abstract

Different volume concentrations (1.2, 0.6, 0.3 wt%) of Fe3O4/water nanofluids and for different Reynolds number (Re) varying from 2180 to 9160 were used experimentally. The aim of work is to study the effect of applying various magnetic field intensity 15.1, 30.3, 45.5 mT on heat transfer enhancement in a horizontal pipe heated with constant heating flux of 420 W. Results showed that Nusselt number (Nu) increases with increasing Re for the nanofluids and water regardless the presence or absence of the magnetic field. Also, higher values were obtained than water. The average increase in Nu for Fe3O4-nanofluids is 16.7% relative to water when the magnetic field is not applied. However, the average increase in heat transfer coefficient and Nusselt number are 9.4%, 26.1%, 31.3% and 8.8%, 13.1%, and 23.9% in the presence of magnetic field [Formula: see text] compared to the absence of magnetic field and base fluid water, respectively. Furthermore, pressure drop increases with the increase of Reynolds number and magnetic field strength. It can be concluded that the magnetic field has a big effect on the thermal transfer performance of Fe3O4/water nanofluid when compared with the thermal motion of magnetic nanoparticles. Finally, it is found that the performance factor is above unity in the presence and absence of magnetic field strength. This means that Nusselt number enhancement is higher than friction changes, which indicates the applicability of the heated pipe in the improvement of heat transfer. These results can be useful for enhancing heat transfer in many engineering applications such as heat exchangers, medical devices, and electronic devices.

Experimental Investigations of Forced Convection of Nanofluids in Smooth, Horizontal, Round Tubes: A Review

“…Like Sharma et al [60], Asirvatham et al [69], Meyer et al [88], Wusiman et al [94], Selvam et al [129], and Saxena et al [135], Demirkir and Ertürk [154] observed that the transition from laminar to turbulent flow occurred at lower Re number with NPs concentration increase. Ebaid et al [155] observed an almost 17% increase in the Nu number with an increase in NPs concentration compared to base fluid for turbulent flow. Siddiqi et al [156] determined that for the same concentration of NPs, the average HTC decreased from a maximum of about 29% by more than half with a doubling of the tube diameter.…”

Exploring cooling of PV panels based on metallic and nonmetallic nanofluids: An experimental study

“…To synthesize the Fe 3 O 4 nanoparticles, Ebaid et al 26 dissolved 16 g of ferrous-chloride-tetrahydrate (FeCl 2 . 4H 2 O, 99.0%, Fischer) in 300 ml of deoxygenated deionized water and 32 g of ferric-chloride-hexahydrate (FeCl 3 .6H 2 O, 99.0%, Alpha Chemika) in 400 ml of deoxygenated deionized water separately, as shown in Figure 1(a).…”

“…Previous research into solar PV cooling using nano-fluids has focused on those made with metal, metal-oxide, and silicon carbide nanoparticulate inclusions. Ebaid et al 26 investigated the enhancement of heat transfer using water-based magnetite-nano-fluids in a heated pipe. The results showed that the thermal transfer performance of Fe 3 O 4 /water nano-fluid is significantly affected by the magnetic field.…”

RANCANGAN HEAT EXCHANGER JENIS SHELL AND TUBE UNTUK PRODUKSI NANOPARTIKEL Fe3O4 SKALA INDUSTRI

“…Penelitian ini didasarkan dari penelitian sebelumnya [5] yang dilakukan pada skala laboratorium dengan mencampurkan 8 g besi klorida tetrahidrat (FeCl2.4H2O) dalam 150 mL air asam terdeoksigenasi dan 16 g besi klorida heksahidrat (FeCl3.6H2O) dalam 200 mL air asam terdeoksigenasi yang dilarutkan secara terpisah dan kemudian dipanaskan pada suhu 70 -80 o C. Setelah nanopartikel Fe3O4 terbentuk kemudian endapan disaring dengan kertas saring dan dicuci beberapa kali dengan akuades dan etanol hingga pH netral. Dari prosedur tersebut diketahui bahwa pada proses produksi Fe3O4 membutuhkan sistem pemanasan.…”

“…Pada proses pembuatan nanopartikel Fe3O4 dalam pelaksanaannya merujuk pada penelitian yang sebelumnya telah dilakukan oleh Ebaid [5] dimana tahap yang dilakukan yaitu mencampurkan 8 g besi klorida tetrahidrat (FeCl2.4H2O) dalam 150 mL air asam terdeoksigenasi dan 16 g besi klorida heksahidrat (FeCl3. (2)…”