The study on application of TiO 2 /water nanofluid in plate heat exchanger of milk pasteurization industries

Taghizadeh-Tabari, Zohre; Heris, Saeed Zeinali; Moradi, Maryam; Kahani, Mostafa

doi:10.1016/j.rser.2015.12.292

Cited by 105 publications

(41 citation statements)

References 49 publications

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“…However, it should not be left unsaid that low pressure drops, obtained in this study, could be a great advantage of our designed system. One of rare applications of nanofluids in food industry is a recent work by Taghizadeh‐Tabari, Zeinali Heris, Moradi, and Kahani () who added TiO 2 to distilled water to enhance heat transfer but reported that nanofluid at all concentrations (having 0.25, 0.35, or 0.8% nanoparticles) showed higher transfer rate than basefluid but greater pressure drop which could be regarded as a disadvantage.…”

Section: Methodsmentioning

confidence: 99%

Designing and application of a shell and tube heat exchanger for nanofluid thermal processing of liquid food products

Jafari

Saramnejad

Dehnad

2017

J Food Process Engineering

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One of the most commonly used types of heat exchangers is the shell and tube heat exchanger. It has been well established that applications of nanofluids in shell and tube heat exchangers are a competitive alternative for common industrial fluids such as hot water. However, conventional applications of nanofluids are restricted to nonfood industries. So, for the first time, this study aimed to design a shell and tube heat exchanger through Kern method for food applications and involving different equations and calculations in detail, to deploy intelligent thermal equipment and PLC section for controlling the performance of shell and tube heat exchanger, and finally, to apply that heat exchanger for two food products, that is, watermelon and tomato juice, in order to survey the extent to which this equipment, by using nanofluids rather than common hot water systems, can improve temperature–time profile of food systems and diminish their energy consumption. Kern method could accurately estimate the number of tubes, tube pitch, baffle spacing, tubes per pass, as well as shell‐side, tube‐side, and overall heat transfer coefficients while maintaining pressure drops in acceptable ranges. Application of 2 and 4% alumina nanofluids, instead of hot water, decreased thermal processing time of watermelon juice by 24.14 and 51.72%; similarly, these reduction rates were 22.3 and 48.76% for tomato juice processing. Consequently, energy consumption rates of watermelon juice processing dwindled to 24.64 and 48.34% and of tomato juice to 22.3 and 48.76% through deployment of 2 and 4% Al2O3, compared to hot water, respectively. Practical applications Fluids with suspended particles of nanometals or oxidized metals benefit from better heat transfer properties. There is limited research dealing with effects of adding nanoparticles to conventional thermal fluids for fruit juices processing. So, the goal of this research was to introduce nanofluid technology for thermal processing of food products, increasing heat transfer efficiency in shell and tube exchangers by nanofluids and frugality in energy consumption for pasteurization, reducing thermal processing duration and better quality retention of food products.

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Section: Methodsmentioning

confidence: 99%

Designing and application of a shell and tube heat exchanger for nanofluid thermal processing of liquid food products

Jafari

Saramnejad

Dehnad

2017

J Food Process Engineering

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“…Taghizadeh-Tabari et al [29] performed experimentation on plate heat exchanger of milk pasteurization industry by using TiO 2 /water nanofluid. Peclet number is used in experiment to compare performance of nanofluid with different concentrations.…”

Section: Application Of Titanium Dioxidementioning

confidence: 99%

Heat Transfer Applications of TiO2 Nanofluids

Ali¹,

Sajid²,

Arshad³

2017

Application of Titanium Dioxide

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To achieve acme heat transfer is our main disquiet in many heat transfer applications such as radiators, heat sinks and heat exchangers. Due to furtherance in technology, requirement for efficient systems have increased. Usually cooling medium used in these applications is liquid which carries away heat from system. Liquids have poor thermal conductivity as compared to solids. In order to improve the efficiency of system, cooling medium with high thermal conductivity should be used. Quest to improve thermal conductivity leads to usage of different methods, and one of them is addition of nanoparticles to base liquid. Application of nanofluids (a mixture of nanoparticles and base fluid) showed enhancement in heat transfer rate, which is not possible to achieve by using simple liquids. Different researchers used TiO 2 nanoparticles in different heat transfer applications to observe the effects. Addition of titanium oxide nanoparticles into base fluid showed improvement in the thermal conductivity of fluid. This chapter will give an overview of usage of titanium oxide nanoparticles in numerous heat transfer applications.

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“…With the advent of nanofluids in heat transfer applications, many researchers analyzed SPHE both numerically and experimentally using nanofluids as working medium and found improved thermal performance . The reason for the enhancement in the thermal performance can be attributed to nanoparticles thermal conductivity and volume fractions.…”

Section: Introductionmentioning

confidence: 99%

“…[14][15][16][17] With the advent of nanofluids in heat transfer applications, many researchers analyzed SPHE both numerically and experimentally using nanofluids as working medium and found improved thermal performance. [18][19][20][21][22][23][24][25][26][27][28] The reason for the enhancement in the thermal performance can be attributed to nanoparticles thermal conductivity and volume fractions. This implies that under constant volume fraction and flow rates, enhanced thermal performance purely depends on the conductivity of nano constituents.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement using hybrid nanofluids in spiral plate heat exchangers

Returi

Konijeti

Dasore

2019

Heat Trans. Asian Res.

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A possible way to enhance the rate of heat transfer in the spiral plate heat exchanger (SPHE) is by employing hybrid nanofluids as its working medium. Hence, in the present work, effects of hybrid nanofluids on the thermal performance of SPHE has been investigated numerically. First, a countercurrent SPHE is designed and modeled. Later, simulation of SPHE has been carried out by employing conventional fluid (H2normalOnormal), nanofluids (Al2normalO3)/normalH2O,normalCnormalunormalO/normalH2O,normalTnormaliO2/normalH2O), and hybrid nanofluids (Al2normalO3+normalCnormalunormalO/normalH2O,Anormall2normalO3+normalTnormalinormalO2/normalH2O) to investigate the heat transfer rates. Finally, the performance of SPHE using hybrid nanofluid is compared with that of using water and nanofluids. The heat transfer augmentation of approximately 16%‐27% with hybrid nanofluids of overall 4% nanoparticles volume concentration and 10%‐16% with 2% nanoparticles volume concentration is observed when compared with that of pure water. Therefore, it can be inferred that the application of hybrid nanofluids in SPHE seems to be one of the promising solutions for augmentation of its thermal performance.

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The study on application of TiO 2 /water nanofluid in plate heat exchanger of milk pasteurization industries

Cited by 105 publications

References 49 publications

Designing and application of a shell and tube heat exchanger for nanofluid thermal processing of liquid food products

Designing and application of a shell and tube heat exchanger for nanofluid thermal processing of liquid food products

Heat Transfer Applications of TiO2 Nanofluids

Heat transfer enhancement using hybrid nanofluids in spiral plate heat exchangers

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