Numerical study on impact behavior of nanoparticle shapes on the performance improvement of shell and tube heat exchanger

Hajabdollahi, Hassan; Hajabdollahi, Zahra

doi:10.1016/j.cherd.2017.05.005

Cited by 38 publications

(15 citation statements)

References 25 publications

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“…Higher particle concentration was needed in the cases of blades and bricks nanoparticle shapes. In this also cylindrical shows the best result [17].…”

Section: Shape Of Particlementioning

confidence: 89%

Effect of Different Nanofluids on Performance of Shell and Tube Heat Exchanger: A Review

Kamthe¹

2017

IJRET

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“…Higher particle concentration was needed in the cases of blades and bricks nanoparticle shapes. In this also cylindrical shows the best result [17].…”

Section: Shape Of Particlementioning

confidence: 89%

Effect of Different Nanofluids on Performance of Shell and Tube Heat Exchanger: A Review

Kamthe¹

2017

IJRET

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“…Finally, thermal and hydraulic coefficients are defined as follows 24 : where Re NF , Pr NF , and n p are Reynolds number, Prandtl number, and tube pass number, respectively. The mentioned factors are accurate for the Reynolds number in the range of 2500 to 124 000.…”

Section: Formulations Of Nanoparticles Casementioning

confidence: 99%

“…In addition to the thermal effectiveness, cost is one of the most important parameters that must be taken into account in the optimal design of HE. In this investigation, two costs including the initial cost (investment cost of HE) and the operation cost (the cost of pumping cold and hot fluids) are considered in calculating the total annual cost (TAC) in the following form 24,31 :…”

Section: Formulations Of Shell Sidementioning

confidence: 99%

“…Density and heat capacity of the nanoparticle are 3050 kg/m 3 and 618.3 W/m•K, respectively. 24 The input constant of economics modeling including interest rates, equipment life period, pump efficiency, operation hours in a year, electrical unit price, and unit price of nanoparticles are assumed to be 10%, 10, 0.6, 7500, 0.02 $/kWh, and 300 $/kg, respectively. Remaining parameters of the modeling input are shown in Table 4.…”

Section: Case Studymentioning

confidence: 99%

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Thermoeconomic analysis and multiobjective optimization of tubular heat exchanger network using different shapes of nanoparticles

2020

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In this study, the effects of different nanoparticle shapes including blades, cylinders, and bricks on the thermoeconomic optimization of tubular heat exchanger (HE) networks have been studied. Boehmite alumina was used as nanoparticle and water as the base fluid. Optimal results were proposed to improve both thermal effectiveness and total annual cost simultaneously by eight design parameters. In addition, optimization was performed for four nanofluid mass flow rates, 0.5, 1, 1.5, and 2 kg/s. The results show that the application of nanoparticles was accompanied by an improvement in the thermal economic parameters of the HE network, and this improvement rate was noticeable in higher values of effectiveness. However, the results indicate a nanofluid optimal mass flow rate of 1.5 kg/s, whereas there was no significant improvement by increasing mass flow rate to 2 kg/s. The optimum results in this paper showed that the best-studied nanoparticle shape was blade, followed by brick and cylinder shapes.

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“…Another and new useful way to increase the of heat transfer and improve the thermal performance of heat exchangers is the use of nanoparticles in the fluid. For example, Hajabdollahi et al investigated the effect of different nanoparticle shapes on the performance improvement of a shell and tube heat exchanger. The optimum results reveal that heat exchanger thermoeconomic parameters are improved higher in the case of bricks as nanoparticle shape and generally followed by blades, cylindrical, and platelets shapes.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of heat transfer and friction factor in a tube with groove and rib on the wall

et al. 2020

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Heat transfer and friction factor in a tube with turbulator internally grooved and rib are studied using numerical simulation. Two different turbulator geometries, including only groove and both groove and rib, on the tube wall are investigated. The study is developed for different parameters of turbulator including pitch ratio (PR), groove and rib height (DR), and Reynolds number in the range of 10 000 to 38 000. The results revealed that the best Nusselt number is achieved for GR turbulator and for the tube wall with PR = 2 and DR = 1. Furthermore, for a specific turbulator parameter, Nusselt number is improved by 46% compared with the experimental result. The results show that the friction factor decreases by increase of both step and height ratios. For example, based on Reynolds number, 21% to 69% reduction in the friction factor was observed for PR = 7 and DR = 3. In addition, the correlations for Nusselt number and friction factor with acceptable deviation are presented for the studied turbulators.Finally, thermal performance enhancement factor is defined to be a good criterion for selection of the optimum turbulator and their parameters.correlation, friction factor, Nusselt number, thermal performance enhancement factor, turbulator

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Numerical study on impact behavior of nanoparticle shapes on the performance improvement of shell and tube heat exchanger

Cited by 38 publications

References 25 publications

Effect of Different Nanofluids on Performance of Shell and Tube Heat Exchanger: A Review

Effect of Different Nanofluids on Performance of Shell and Tube Heat Exchanger: A Review

Thermoeconomic analysis and multiobjective optimization of tubular heat exchanger network using different shapes of nanoparticles

Numerical study of heat transfer and friction factor in a tube with groove and rib on the wall

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