Heat transfer enhancement with elliptical tube under turbulent flow TiO2-water nanofluid

Hussein, Ahmed; Bakar, Rosli Abu; Kadirgama, K.; Sharma, K.V.

doi:10.2298/tsci130204003h

Cited by 25 publications

(14 citation statements)

References 18 publications

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“…Some review papers have contained the studies of nanofluid with porpous medium in the heat exchanger Agarwal et al [31], Hussein et al [32]. Hussein et al [33][34][35] have investigated numerically the heat transfer and friction characteristics by employing elliptical tube to increase the heat transfer rate with a minimum increase of pressure drop. It was concluded that the heat transfers and pressure drop increase with increasing volume concentrations but decreasing with diameters of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Improving thermal performance using Al2O3-water nanofluid in a double pipe heat exchanger filling with porous medium

Kamel

Mohammed

2020

THERM SCI

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A double pipe heat exchanger is significant device for many industrial applications. In this paper, an experimental study using both porous media and nanofluid to enhance heat transfer in a double pipe heat exchanger is performed. The test rig has been fabricated with inner copper pipe of 1.10m length, 16mm and 14mm outside and inside diameter respectively. While, the outer PVC pipe is 1m length, 31mm and 27mm outside and inside diameter respectively. The inner pipe has been filling with 3mm diameters of steel balls porous media. The experimental tests were performed utilizing alumina nanofluid (Al2O3/water) with two volume concentrations 0.5% and 1%. The volume flowrates are in the range of (2-5) liter/min and 10 liter/min through inner and outer pipe respectively. It was conducted with a constant 28ᵒC inlet temperature of cold fluid flow inside the inner pipe and 50ᵒC inlet temperature of hot fluid flow inside the outer pipe. Results indicated that the heat transfer enhanced as nanofluid volume concentrations and volume flowrates increase. It was observed that Effectiveness increases as increase of flowrate and nanofluid concentrations.

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Section: Introductionmentioning

confidence: 99%

Improving thermal performance using Al2O3-water nanofluid in a double pipe heat exchanger filling with porous medium

Kamel

Mohammed

2020

THERM SCI

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“…The heat exchanger tubes (HET) are the core components enriched with various insert geometries to enhance heat transfer rate in most of the mechanical and thermal equipment's used in engineering devices to industrial and house hold appliances [1][2][3]. In the present scenario many studies have been carried out with the aim of energy saving by minimize the size, cost and power consumption of various heat exchanger techniques [4][5][6]. The compact and geometrically enriched heat exchanger with various inserts was found an efficient way to enhance the THERMAL SCIENCE: Year 2019, Vol.…”

Section: Introductionmentioning

confidence: 99%

Fluid flow and heat transfer enhancement in wings with combined solid ring twisted tape inserts circular heat exchanger tube

Datt

Bhist

Kothiyal³

et al. 2019

THERM SCI

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Experimental examination is carried out to study the turbulent heat transfer and fluid-flow characteristics in circular heat exchanger tube using combined wing with solid ring twisted tape inserts. A series of experiments has been performed with the range of Reynolds number varied from 3000 to 21000, number of twisted taped inserts, N TT , varied from 1.0 to 4.0 with constant value of other twisted tape parameters such as rings pitch ratio, d R /D T = 1.0, wing pitch ratio, P W /W T = = 3.0, and wing depth ratio, W d /W T = 1.67. Based on the examined, turbulent heat transfer and fluid-flow in wing with combined solid ring twisted tape inserts results are compared with plain circular tube under same operating conditions. The experimental results show that the heat transfer is increased around 5.66 times than plane circular heat exchanger tube. The thermal and hydrodynamic performance parameter based on equal pumping power, η p , was found to be highest for N TT = 3.0. The optimum value of thermal and hydrodynamic performance has been found to be 2.74 for Reynolds mumber of 3000 within the range of the parameters investigated. Multiple wings with solid rings twisted tape inserts have been also shown to be thermally as well as hydraulically better in comparison to other similar twisted tape insert geometries.

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“…Turbulent forced convection heat transfer of water and nanofluid inside tube under single phase approach was carried out by the authors of References [2][3][4][5][6]. Pak and Cho [7] were investigated the effect of two different metallic oxide particles, titanium dioxide and alumina with mean diameters of 27 and 13 nm, respectively on base fluid (water) experimentally.…”

Section: Introductionmentioning

confidence: 99%

Nanofluid Convective Heat Transfer Enhancement Elliptical Tube inside Circular Tube under Turbulent Flow

Danook

Jasim

Hussein

2018

MCA

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Heat transfer enhancement employing an elliptical tube inside a circular tube to increase the heat transfer rate without increasing in pressure drop is investigated. The flow rate inside the narrow is in the range of Reynolds number 10,000 to 100,000. Commercial software is used to solve the governing equations (continuity, momentum, and energy) by adopting a finite volume method (FVM). The electrical heater is connected around the circular tube to apply uniform heat flux (3000 W/m2) as a boundary condition. The volume concentrations are in the range of 0.25% to 1% with different TiO2 nanoparticle diameters in the range of 27 nm to 50 nm dispersed in water. The results indicate that the elliptical annulus tube can enhance heat transfer and friction factor by approximately 19% and 6% than the circular tube respectively. Results show that the heat transfer enhancement is significantly increasing as the volume concentrations increase and the nanoparticles size diameter decrease.

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Heat transfer enhancement with elliptical tube under turbulent flow TiO2-water nanofluid

Cited by 25 publications

References 18 publications

Improving thermal performance using Al2O3-water nanofluid in a double pipe heat exchanger filling with porous medium

Improving thermal performance using Al2O3-water nanofluid in a double pipe heat exchanger filling with porous medium

Fluid flow and heat transfer enhancement in wings with combined solid ring twisted tape inserts circular heat exchanger tube

Nanofluid Convective Heat Transfer Enhancement Elliptical Tube inside Circular Tube under Turbulent Flow

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