Advances in heat intensification techniques in shell and tube heat exchanger

Roy, Uttam; Roy, Pranab

doi:10.1016/b978-0-12-819422-5.00007-4

Cited by 9 publications

(3 citation statements)

References 20 publications

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“…Nusselt number remarkably is more than 32 for nanofluids indicating that the heat transfer is coeffective mode, and the experimental results reflects good enhancement of nanofluids. To our knowledge, if the Nusselt number is between 1 and 10, it is a laminar flow with coeffective heat transfer [45]. However, the flow is laminar, it is observed that the Nusselt number is more than 32 in the presence and absence of nanoparticles, interpreting that the nanofluids highly work as a successful coolant in terms of convection.…”

Section: Nusselt Numbermentioning

confidence: 91%

Design of Nanofluid-Based Spring Water/Tap Water and Nanoparticles of Fe2O3/ZnO as a Coolant for the Engines

Faisal,

Abdullah Mohammed

2023

DJES

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In this work, an experimental system was established to measure the heat transfer characteristics, including the heat transfer coefficient, overall heat transfer, Nusselt number, and thermal conductivity. The investigation focused on spring water and tap water-based nanofluids containing Fe2O3 and ZnO nanoparticles with particle sizes of 50 nm and 70 nm, respectively. The experiments were conducted inside an automobile engine, studying the effects of varying nanoparticle volume fractions at a constant temperature. Fe2O3 and ZnO concentration in the respective based fluids was verified between 0.02 % and 0.08 % v/v and 0.01 and 0.07 %, respectively. The spring water is not so far used in the previous studies and is much more available in Kurdistan region. Reynolds numbers of nanofluids inside the engine were considered between 1000 to 8000 in a different range as that of the literature review. Reynolds analogy for heat and momentum has been employed in this study. It was observed that the thermo-physio-mechanical properties of nanofluids increased with increase in the concentration of nanoparticles and Reynolds number. However, the friction factor decreased with increasing Reynolds number but increased with an increasing volume concentration of nanoparticles. Generally, the results showed that the enhancement of the effective heat transfer of the nanofluids reached 46%, the overall heat transfer coefficient reached 39%, thermal conductivity reached 21.35% and Nusselt number reached to 38%. at 0.08% volume fraction of Fe2O3/spring water nanofluid. Based on all previous parameters estimated, the designed nanofluids in this study could be classified as a workable nanofluid in many industry applications

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Section: Nusselt Numbermentioning

confidence: 91%

Design of Nanofluid-Based Spring Water/Tap Water and Nanoparticles of Fe2O3/ZnO as a Coolant for the Engines

Faisal,

Abdullah Mohammed

2023

DJES

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“…Miniaturization needs rapid heat transfer from the system such as micro channels enclosures, and deforming tubes are a few common techniques to improve heat transfer in thermal devices and energy schemes [2][3][4]. In everyday life, heat transmission occurs almost everywhere, also in the engineering processes like packed-bed storage tanks, grain storage, packed-bed catalytic reactors.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Energy Transfer Performance in an Inclined Magneto-Convective Sutterby Ternary Hybrid Nanoflow: Application for Nano Diesel

Poornima

2024

Contemp. Math.

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This study investigates sodium alginate-based nano-lubricants with added copper and aluminum oxides. The thermal performance of nano (Al2O3), hybrid (Al2O3 + CuO) and ternary (Al2O3 + CuO + TiO2) nanofluids is studied and compared in this article. Due to the significant impact of higher stream rates, the ternary nanofluid is crucial in domains such as petroleum engineering. A Sutterby nanoflow model past a stretching sheet embedded in permeable media is considered. In this fluid, the effects of thermal radiation, hotness source/sink, inclined magneto-convection under Stefan blowing, and chemical reaction are assumed. The highest-order nonlinear partial differential equation is handled by utilizing the similarity function, producing a new set of ordinary differential equations. The derived equations are then quantitatively analyzed using the bvp4c approach in MATLAB.Graphical representations of several features for specific non-dimensional variables, including heat transfer, Sherwood, drag coefficient, velocity, temperature, and concentration, are presented. An increase in the thermal curve is observed due to the heat source/sink parameter; however, the Nusselt number exhibits the opposite pattern. The participation of Nb and the thermophoresis force led to greater thermal radiation. For Sc and Kr, the mass transfer ratio of the ternary nanofluid is lower. The results show very good congruence when compared to the literature. Our results also prove that the ternary hybrid nanofluid transfers more heat from the system than the hybrid or nanofluid. With an increase in Stefan blowing, the rate of energy and mass transfer rises, while the local skin friction coefficients show a tendency in the opposite direction.

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“…Heat exchangers under operation experience an acquisition of depositing materials on their surface. This surface accumulation of non‐usable materials results in a decreased efficiency of heat transfer, a phenomenon referred to as fouling 3. Fouling comprises of complicated chemical and physical procedures, involving chemical reactions (like auto‐oxidation, precursor formation, accumulation, etc.…”

Section: Introductionmentioning

confidence: 99%

Overview of Fouling – An Industrial Jeopardy

Unnikrishnan

Lavanya

2023

ChemBioEng Reviews

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A brief insight into fouling and its various types, which impose a hurdle on the performance of an apparatus and ultimately a negative impact on the environment as a whole due to the excess unwanted deposits, is given. Within the various types mentioned, specific cases of fouling occurrences in each are also highlighted. The mechanism associated with the specific cases as well as the difficulties arising are mentioned as interpreted from previous literature and experiments. There are cases where more than one type of fouling is found to be simultaneously occurring, which is referred to as composite fouling. Numerous parameters control this phenomenon, along with some exceptions associated with the same. Few membranes or plates or their physical aspects prove to be quite effective in withstanding or overcoming a specific type of fouling. Mitigation of fouling demands proper monitoring and control of the chemical processes to ensure lesser damage to the equipments. Industrial fouling in general and specific scenarios of fouling are overviewed and discussed.

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Advances in heat intensification techniques in shell and tube heat exchanger

Cited by 9 publications

References 20 publications

Design of Nanofluid-Based Spring Water/Tap Water and Nanoparticles of Fe2O3/ZnO as a Coolant for the Engines

Design of Nanofluid-Based Spring Water/Tap Water and Nanoparticles of Fe2O3/ZnO as a Coolant for the Engines

Enhanced Energy Transfer Performance in an Inclined Magneto-Convective Sutterby Ternary Hybrid Nanoflow: Application for Nano Diesel

Overview of Fouling – An Industrial Jeopardy

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