Diamond Nanofluids: Microstructural Analysis and Heat Transfer Study

Mashali, Farzin; Languri, Ethan; Davidson, J.L.; Kerns, D.V.

doi:10.1080/01457632.2019.1707388

Cited by 12 publications

(3 citation statements)

References 45 publications

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“…The Holman equation [43] can be used to quantify the uncertainty resulting from the measured parameters. Where E is the uncertainty in the function, y is the calculated parameter, and 𝑥 𝑖 is the measurement uncertainty.…”

Section: Uncertainty Analysismentioning

confidence: 99%

Efficient Industrial Wastewater and Leachate Evaporation Utilizing Heat Localization in Porous Media

Zaro,

Jones,

Languri

2023

J Energ Power Technol

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In this paper, an efficient industrial wastewater and leachate evaporation method is proposed and tested experimentally. The goal of this study is to investigate whether the addition of a carbon foam (CF) porous layer can lead to energy savings by evaporating more water mass per unit of energy input. The standard boiling evaporator layout was redesigned by placing the heating element in the upper region of the tank and CF underneath the heat source. The CF purposed to localize the energy in an area by the water's surface and minimize conduction heat losses to the rest of the water. A 90.2% reduction in energy lost to regions outside of the CF isolated control volume, specifically during the evaporator preheating process was observed with the addition of 100 Pores Per Inch (PPI) CF. In addition, a reduction in evaporative energy intensity was observed yielding results of 3.344 , 3.441 , and 3.644 for the 100 PPI, 45 PPI, and 10 PPI tests, respectively. This new evaporation design provides a more energy- and cost-efficient method for reducing the volume of various industrial wastewater and leachate concentrations onsite.

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Section: Uncertainty Analysismentioning

confidence: 99%

Efficient Industrial Wastewater and Leachate Evaporation Utilizing Heat Localization in Porous Media

Zaro,

Jones,

Languri

2023

J Energ Power Technol

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“…Hence, a high level of sp 3 carbon bonded diamond nanoparticles can be obtained. This can be done by using oxidants such as nitric acid (HNO 3 ), perchloric acid (HCLO 4 ), or hydrochloric acid (HCL) [ 81 ]. Furthermore, the modification phase is essential so that the fabricated NDs can meet the requirements of their targeted application.…”

Section: Synthesis Of Nanoscaled Carbon-based Materialsmentioning

confidence: 99%

Carbon-Based Nanofluids and Their Advances towards Heat Transfer Applications—A Review

et al. 2021

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Nanofluids have opened the doors towards the enhancement of many of today’s existing thermal applications performance. This is because these advanced working fluids exhibit exceptional thermophysical properties, and thus making them excellent candidates for replacing conventional working fluids. On the other hand, nanomaterials of carbon-base were proven throughout the literature to have the highest thermal conductivity among all other types of nanoscaled materials. Therefore, when these materials are homogeneously dispersed in a base fluid, the resulting suspension will theoretically attain orders of magnitude higher effective thermal conductivity than its counterpart. Despite this fact, there are still some challenges that are associated with these types of fluids. The main obstacle is the dispersion stability of the nanomaterials, which can lead the attractive properties of the nanofluid to degrade with time, up to the point where they lose their effectiveness. For such reason, this work has been devoted towards providing a systematic review on nanofluids of carbon-base, precisely; carbon nanotubes, graphene, and nanodiamonds, and their employment in thermal systems commonly used in the energy sectors. Firstly, this work reviews the synthesis approaches of the carbon-based feedstock. Then, it explains the different nanofluids fabrication methods. The dispersion stability is also discussed in terms of measuring techniques, enhancement methods, and its effect on the suspension thermophysical properties. The study summarizes the development in the correlations used to predict the thermophysical properties of the dispersion. Furthermore, it assesses the influence of these advanced working fluids on parabolic trough solar collectors, nuclear reactor systems, and air conditioning and refrigeration systems. Lastly, the current gap in scientific knowledge is provided to set up future research directions.

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“…[ 24 ] Several studies used a transient hot wire approach to investigate TC of nanofluids containing ND particles. [ 25–32 ] All these studies reported an increase in TC with nanodiamond concentrations. Several of these studies attributed the increase in TC to the inherited thermal properties of bulk diamond, while some to the role of Brownian motion or the formation of covalent bonds.…”

Section: Introductionmentioning

confidence: 99%

Nanodiamond‐Agarose Gels for Effective Photothermal Heating

Rashwan,

Baskaran,

Burda

2023

Adv Funct Materials

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Experimental investigation of the photothermal properties of carboxylated nanodiamond (ND) particles in agarose gel base medium over a range of very low particle concentrations from 6.55 × 10−5 to 2.29 × 10−2% v/v and two different sizes (35 and 160 nm) is carried out. Laser‐induced spot heating of gels with trace amounts of ND particles lead to a very large increase in temperatures away from the spot compared to base gels. These increases are inconsistent with any thermal conductivity increases associated with the incorporation of particles. UV‐visible and Raman spectroscopy investigation demonstrates that this photothermal phenomenon is attributed to particle concentrations and size‐dependent changes in optical scattering/entrapment of nanoparticle‐laden gels. Structural investigation of the gels suggests that ND particles associate with the agarose polymer structure which leads to increased optical scattering and entrapment in particle‐laden gels. Collectively, it is concluded that combining trace amounts of nanodiamond particles in agarose gels dramatically affect the light scattering and entrapment properties of the nanoparticle‐laden gels, subsequently influencing the photothermal conversion efficiency of the system. This effect arises from the synergistic modification of the gel by the nanodiamond particle addition, rather than the independent effects of nanoparticles or the gel alone.

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Diamond Nanofluids: Microstructural Analysis and Heat Transfer Study

Cited by 12 publications

References 45 publications

Efficient Industrial Wastewater and Leachate Evaporation Utilizing Heat Localization in Porous Media

Efficient Industrial Wastewater and Leachate Evaporation Utilizing Heat Localization in Porous Media

Carbon-Based Nanofluids and Their Advances towards Heat Transfer Applications—A Review

Nanodiamond‐Agarose Gels for Effective Photothermal Heating

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