Heat transfer performance and friction factor of various nanofluids in a double-tube counter flow heat exchanger

Zhen, Dan; Wang, Jin; Pang, Yu; Chen, Zhanxiu; Sundén, Bengt

doi:10.2298/tsci200323280z

Cited by 19 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on test results of heat transfer performance and flow resistance, the 1% CuO–water nanofluid showed a great advantage due to a relatively high heat transfer performance (44.3%) and a low friction factor (24.9~32.7%). The 0.5% SiO 2 –water nanofluids also presented a low friction factor (26.0~28.3%) with an enhancement of heat transfer of up to 32.5% [ 69 , 70 ] (here, the friction factor is proportional to the pressure drop). In another study, Subramanian et al experimentally analyzed the heat transfer performance of a TiO 2 –water nanofluid in a double-pipe counter-flow heat exchanger for various flow regimes, laminar, transition, and turbulent cases, with Reynolds numbers between 1350 and 4650 and with a 0.5% volume concentration.…”

Section: Effects Of Nanofluid Characteristics On Heat Transfer Rate A...mentioning

confidence: 99%

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

et al. 2022

View full text Add to dashboard Cite

Nanofluids can be employed as one of the two fluids needed to improve heat exchanger performance due to their improved thermal and rheological properties. In this review, the impact of nanoparticles on nanofluid properties is discussed by analyzing factors such as the concentration, size, and shape of nanoparticles. Nanofluid thermophysical properties and flow rate directly influence the heat transfer coefficient and pressure drop. High thermal conductivity nanoparticles improve the heat transfer coefficient; in particular, metallic oxide (such as MgO, TiO2, and ZnO) nanoparticles show greater enhancement of this property by up to 30% compared to the base fluid. Nanoparticle size and shape are other factors to consider as well, e.g., a significant difference in thermal conductivity enhancement from 6.41% to 9.73% could be achieved by decreasing the Al2O3 nanoparticle size from 90 to 10 nm, affecting nanofluid viscosity and density. In addition, equations to determine the heat transfer rate and the pressure drop in a double-pipe heat exchanger are presented. It was established that the main factor that directly influences the heat transfer coefficient is the nanofluid thermal conductivity, and nanofluid viscosity affects the pressure drop.

show abstract

Section: Effects Of Nanofluid Characteristics On Heat Transfer Rate A...mentioning

confidence: 99%

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Li et al (2021) used the direct current of 0-150 W to achieve the heat flux used to heat the straight tube used in the experiment. Zheng et al (2020c) investigated the effect of inlet temperature on the thermal performance of the Al 2 O 3 -water nanofluid and noted that the nanofluid volume concentration has a considerable effect on the performance depending on the inlet temperature. Singh and Sarkar (2021) reported a reduction in the Nusselt number of the hybrid nanofluid (Al 2 O 3 1 TiO 2 ) by 38.5% when the temperature increased from 50°C to 70°C.…”

Section: Introductionmentioning

confidence: 99%

Effect of inclination angle on the thermal-hydraulic characteristics and entropy generation of Al₂O₃–water nanofluid for in-tube turbulent flow

Chinakwe

Adelaja

Akinseloyin

et al. 2023

WJE

View full text Add to dashboard Cite

Purpose Inclination angle has been reported to have an enhancing effect on the thermal-hydraulic characteristics and entropy of some thermal systems. Therefore, this paper aims to numerically investigate the effects of inclination angle, volume concentration and Reynolds number on the thermal and hydraulic characteristics and entropy generation rates of water-based Al2O3 nanofluids through a smooth circular aluminum pipe in a turbulent flow. Design/methodology/approach A constant heat flux of 2,000 Watts is applied to the circular surface of the tube. Reynolds number is varied between 4,000 and 20,000 for different volume concentrations of alumina nanoparticles of 0.5%, 1.0% and 2.0% for tube inclination angles of ±90o, ±60o, ±45o, ±30o and 0o, respectively. The simulation is performed in an ANSYS Fluent environment using the realizable kinetic energy–epsilon turbulent model. Findings Results show that +45o tube orientation possesses the largest thermal deviations of 0.006% for 0.5% and 1.0% vol. concentrations for Reynolds numbers 4,000 and 12,000. −45o gives a maximum pressure deviation of −0.06% for the same condition. The heat transfer coefficient and pressure drop give maximum deviations of −0.35% and −0.39%, respectively, for 2.0% vol. concentration for Reynolds number of 20,000 and angle ±90o. A 95%–99.8% and 95%–98% increase in the heat transfer and total entropy generation rates, respectively, is observed for 2.0% volume concentration as tube orientation changes from the horizontal position upward or downward. Originality/value Research investigating the effect of inclination angle on thermal-hydraulic performance and entropy generation rates in-tube turbulent flow of nanofluid is very scarce in the literature.

show abstract

“…Jasim et al [18] employed alumina nanofluid with 0.5 % and 1% volume concentrations in a double pipe heat exchanger and observed that heat transfer improved as nanofluid volume concentrations and volume flow rates increased. In a double tube heat exchanger, Zhen et al [19] investigated six nanofluids including CuO, Al 2 O 3 , Fe 3 O 4 , ZnO, SiC, and SiO 2 . Due to its comparably high heat transfer performance and low friction factor, they found that CuO-water nanofluid offers a substantial benefit.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of thermophysical properties and heat transfer characteristics of hybrid nanofluids based on particle size

Dhairiyasamy¹,

Ahmed

Abdelrhman

et al. 2022

Therm sci

View full text Add to dashboard Cite

In heat transfer applications, nanofluids are utilized to increase thermal conductivity and heat transfer coefficient. The difficulty of nanoparticle stabilization in the fluids is a significant problem in heat transfer applications. Heat exchanger materials may wear and erode as a result of the additional nanoparticle. When compared to mono nanofluids, this can be lowered by using hybrid nanofluids. In this work, hybrid nanofluids are used in a radiator under laminar flow at 75?C, and the effect of volume concentration on heat transfer enhancement is investigated. The thermophysical characteristics of hybrid nanofluids are investigated using SiC and Al2O3 at 0.1v % and 0.2v %. The results revealed that a hybrid nanofluid with a higher volume concentration improves heat transfer. Finally, regression analysis for laminar flow is carried out and correlations for experimental Nusselt number and friction factor values were developed. The impact of particle size, flow rate, and temperature on the radiator?s heat transfer enhancement is investigated using hybrid nanofluid at 75?C. It is observed that the size of the nanoparticle has a substantial effect on heat transfer characteristics. It is concluded that using smaller-sized hybrid nanoparticles of Al2O3/SiC-S with less volume concentration enhances heat transfer and reduces radiator size compared to conventional coolants.

show abstract

Heat transfer performance and friction factor of various nanofluids in a double-tube counter flow heat exchanger

Cited by 19 publications

References 15 publications

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

Effect of inclination angle on the thermal-hydraulic characteristics and entropy generation of Al₂O₃–water nanofluid for in-tube turbulent flow

Experimental investigation of thermophysical properties and heat transfer characteristics of hybrid nanofluids based on particle size

Contact Info

Product

Resources

About

Heat transfer performance and friction factor of various nanofluids in a double-tube counter flow heat exchanger

Cited by 19 publications

References 15 publications

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

Application of Nanofluids in Improving the Performance of Double-Pipe Heat Exchangers—A Critical Review

Effect of inclination angle on the thermal-hydraulic characteristics and entropy generation of Al2O3–water nanofluid for in-tube turbulent flow

Experimental investigation of thermophysical properties and heat transfer characteristics of hybrid nanofluids based on particle size

Contact Info

Product

Resources

About

Effect of inclination angle on the thermal-hydraulic characteristics and entropy generation of Al₂O₃–water nanofluid for in-tube turbulent flow