Application of porous metal foam heat exchangers and the implications of particulate fouling for energy-intensive industries

Kuruneru, Sahan Trushad Wickramasooriya; Vafai, Kambiz; Sauret, Emilie; Gu, Yuantong

doi:10.1016/j.ces.2020.115968

Cited by 66 publications

(25 citation statements)

References 123 publications

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“…The excellent thermophysical properties of metal foam make it an attractive alternative to conventional finned heat exchange systems [11][12][13]. The results of the study [14] show that at a high Reynolds number and a small foam thickness, the thermal characteristics of a tube wrapped with a metal porous layer are better than a tube with fins at the same weight. The most important result of this study is that when the tube is partially covered with a layer of metal foam, the heat transfer rate can be increased by at least 20% compared to a tube completely wrapped in foam, while the weight of the heat exchanger can be significantly reduced.…”

Section: Introductionmentioning

confidence: 93%

Experimental study of pressure drop in porous structures created on the basis of Kelvin cells

Soloveva

Соловьев

Шакурова

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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In this work, we carried out the experimental studies of the pressure drop in porous structures created on the basis of Kelvin cells. The cross sections of the struts of porous structures had the following geometries: circle, triangle, and spinner. The equivalent diameter of the struts was 5, 10, 15, and 20% of 3 mm, where 3 mm is the length of the edge of the cube into which the cell is inscribed. At the same time, several models of porous structures had narrowing in the struts. Experimental studies were carried out at the following air flow velocities: 0.25; 0.5; 0.75; 1 and 1.25 m/s. The research results showed that with an equivalent strut diameter of 5, 10, and 15% of the length of the edge of the cube in which the cell is inscribed, the largest pressure drop at all studied air flow velocities is observed in porous structures with a circular cross section of the struts, without narrowing. With an equivalent strut diameter of 10, 15, 20% of the length of the cube edge, the smallest pressure drop is shown by cells with a circular cross section of the struts, with a narrowing. With an equivalent strut diameter of 20%, the structure with strut geometry in the form of a spinner showed the highest pressure drop. Thus, the geometry of struts of porous structures has a significant effect on the value of the pressure drop.

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Section: Introductionmentioning

confidence: 93%

Experimental study of pressure drop in porous structures created on the basis of Kelvin cells

Soloveva

Соловьев

Шакурова

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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show abstract

“…The use of liquid-to-air membrane energy exchangers [ 46 , 47 ], porous metal foam heat exchangers [ 48 ], nanofluid as heat transfer fluid [ 49 ], phase change material as heat transfer media [ 50 , 51 , 52 , 53 ], membrane heat exchanger [ 54 , 55 , 56 ], and polymer heat exchangers [ 57 , 58 ] affect the energy consumption and recovery and sustainability of HVAC systems positively.…”

Section: Energymentioning

confidence: 99%

Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Asim

Badiei

Mohammad

et al. 2022

IJERPH

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Increasing demand on heating, ventilation, and air-conditioning (HVAC) systems and their importance, as the respiratory system of buildings, in developing and spreading various microbial contaminations and diseases with their huge global energy consumption share have forced researchers, industries, and policymakers to focus on improving the sustainability of HVAC systems. Understanding and considering various parameters related to the sustainability of new and existing HVAC systems as the respiratory system of buildings are vital to providing healthy, energy-efficient, and economical options for various building types. However, the greatest opportunities for improving the sustainability of HVAC systems exist at the design stage of new facilities and the retrofitting of existing equipment. Considering the high available percentage of existing HVAC systems globally reveals the importance of their retrofitting. The attempt has been made to gather all important parameters that affect decision-making to select the optimum HVAC system development considerations among the various opportunities that are available for sustainability improvement.

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“…It is composed of a rigid framework and internal pores, because it has both metal characteristics and some special physical properties of non-metal, such as porous, lightweight, low density, and high specific strength. There are different types of metal foam, including aluminum foam, titanium foam, copper foam, iron foam, and nickel foam [8]. Among them, nickel foam (Ni foam) is often used as an electrode substrate material in electrochemical energy storage devices, such as secondary nickel-hydrogen, nickel-cadmium batteries, and nickel-zinc batteries, which play a role in collecting current and supporting active materials.…”

Section: Foamsmentioning

confidence: 99%

Nickel Foam Electrode with Low Catalyst Loading and High Performance for Alkaline Direct Alcohol Fuel Cells

Xu¹,

Zhang²,

Yang³

2022

Electrocatalysis and Electrocatalysts for a Cleaner Environment - Fundamentals and Applications

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Nickel foam has a unique three-dimensional (3-D) network structure that helps to effectively utilize catalysts and is often used as an electrode support material for alkaline direct alcohol fuel cells. In this chapter, first, the effect of nickel foam thickness on cell performance is explored. The results show that the thickness affects both mass transfer and electron conduction, and there is an optimal thickness. The thinner the nickel foam is, the better the conductivity is. However, the corresponding three-dimensional space becomes narrower, which results in a partial agglomeration of the catalyst and the hindrance of mass transfer. The cell performance of 0.6 mm nickel foam electrode is better than that of 0.3 and 1.0 mm. Secondly, to fully exert the catalytic function of the catalyst even at a lower loading, a mixed acid-etched nickel foam electrode with lower Pd loading (0.35 mg cm−2) is prepared then by a spontaneous deposition method. The maximum power density of the single alkaline direct ethanol fuel cell (ADEFC) can reach 30 mW cm−2, which is twice the performance of the hydrochloric acid treated nickel foam electrode. The performance improvement is attributed to the micro-holes produced by mixed acids etching, which enhances the roughness of the skeleton and improves the catalyst electrochemical active surface area.

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Application of porous metal foam heat exchangers and the implications of particulate fouling for energy-intensive industries

Cited by 66 publications

References 123 publications

Experimental study of pressure drop in porous structures created on the basis of Kelvin cells

Experimental study of pressure drop in porous structures created on the basis of Kelvin cells

Sustainability of Heating, Ventilation and Air-Conditioning (HVAC) Systems in Buildings—An Overview

Nickel Foam Electrode with Low Catalyst Loading and High Performance for Alkaline Direct Alcohol Fuel Cells

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