Energy Conversion on Differential Magnetization of Fe3O4 Ferrofluid

Vaidya, Milind M.; Pinjari, Dipak V.; Holkar, Chandrakant R.; Kemkar, Sanjana; Nanaware, Siddhesh; Kemkar, S. D.

doi:10.9790/9622-0701030110

Cited by 3 publications

(3 citation statements)

References 21 publications

(12 reference statements)

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“…The diffraction pattern of the Mn0,5Zn0,5Fe2O4 sample is presented in Figure 1. Visually the diffraction peak tends to shift to a lower 2θ value due to the Zn ion composition [22]. The diffraction peaks (2 2 0), (3 1 1), (2 2 2), (4 0 0), (4 2 2), (5 1 1), and (4 4 0) are observed from the diffraction patterns of the X, exhibits good crystallization formation with a single-phase cubic spinel structure and space group Fd3m.…”

Section: Resultsmentioning

confidence: 99%

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Ferrofluid Mn0.5Zn0.5Fe2O4 as Harvesting Energy: Preliminary Study

Santi,

Zuhroh,

Hidayat

et al. 2023

KEM

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Currently humans are still very dependent on resources derived from fossil fuels. Even though fossil fuels are no longer sufficient to meet energy needs. For this reason, renewable energy technology is developed in the form of energy harvesting from mechanical energy in the form of ferrofluid vibrations. The ferrofluid used in this study is composed of filler Mn0.5Zn0.5Fe2O4 where Zn doping is used to increase magnetization, surfactant tetramethylammonium hydroxide (TMAH), and H2O as a liquid carrier. This study aims to study ferrofluid Mn0.5Zn0.5Fe2O4 as energy harvesting. Mn0.5Zn0.5Fe2O4 nanoparticles were synthesized using the coprecipitation method accompanied by nanostructure studies in the form of XRD, FTIR and VSM tests to determine the diffraction peaks, functional groups and magnetic properties of the sample. The diffraction peaks of Mn0.5Zn0.5Fe2O4 are at the peaks (2 2 0), (3 1 1), (2 2 2), (4 0 0), (4 2 2), (5 1 1), and (4 4 0). The FTIR spectrum of Mn0.5Zn0.5Fe2O4 nanoparticles is shown in the wavelength range of 4000-500 cm−1. The band vibration peaks of O-H stretching, CO2, O-H, Mn-O, Zn-O, and Fe-O particles Mn0.5Zn0.5Fe2O4 are respectively at 3392 cm−1, 2309 and 2376 cm−1, 1635 cm−1, 861 and 1636 cm−1, 686 cm−1 and 539 cm−1. The functional group of the metal-oxygen group (M–O) originates from magnetic particles as fillers to form ferrofluids. The competition of Mn and Zn ions at octahedral and tetrahedral sites in the spinel system tends to change the lattice parameters of the Mn0.5Zn0.5Fe2O4 ferrofluid. The magnetization curve of the Mn0.5Zn0.5Fe2O4 ferrofluid has superparamagnetic characteristics with a saturation magnetization value of 31,727 emu/g so it can be used as an energy harvester. Based on the IV electrical test, the Mn0.5Zn0.5Fe2O4 ferrofluid has the potential for energy harvesting with a voltage value of 1.67 µV and a current of 136.6 µA.

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Section: Resultsmentioning

confidence: 99%

“…Generation of energy using a magnetic field is observed by inducing Electromotive Force (emf) in a coil. In principle, the vibration of the magnetic field is connected according to Faraday's law to induce a current which can then drive electrical devices [22].…”

Section: Resultsmentioning

confidence: 99%

Ferrofluid Mn0.5Zn0.5Fe2O4 as Harvesting Energy: Preliminary Study

Santi,

Zuhroh,

Hidayat

et al. 2023

KEM

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“…Furthermore, it is possible to generate solitonic density waves inside a closed‐loop system wrapped with copper wire coils, to extract electromagnetic forces and electric power, giving birth to the first generation of colloidal energy harvesters. [ 59 ] In all the cases where the gravitational field is parallel to both the thermal gradient and the external magnetic field, it is possible to exploit the Benard–Marangoni convection and extract energy through the use of coils, as reported by Kemkar et al [ 60 ]…”

Section: Emerging Technologiesmentioning

confidence: 99%

Waste Heat to Power: Technologies, Current Applications, and Future Potential

et al. 2020

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Energy consumption, environmental impact, and sustainability have risen fast through the ranks, achieving the first places in driving investments, policies, and concerns of all countries at any developmental stage. Energy transformation, though, must cope with nonunitary efficiency of devices and processes, which results in a distributed production of waste heat. A reduction of emissions, implying a conversion of waste heat to more noble forms of energy and a concurrent increase in efficiency of the same devices and processes, is of paramount importance. In view of the enthalpy content and distribution of the different sources of waste heat, low‐grade/low‐enthalpy sources below 200 °C are considered the most fertile field for research and development, with an impressive industrial growth rate. Thermodynamic cycles and thermal conversion devices based on the most relevant physical effects are herein introduced and briefly described, including both solutions that already achieved industrial maturity and less developed systems and devices whose study is still in progress. A specific focus on three application domains, selected due to their economic relevance, is done: industrial processes for the vast energy and capital availability, automotive sector for its permeation, and wearable devices for the market size. Limits and opportunities are critically discussed.

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