Comprehensive numerical model for the analysis of potential heat recovery solutions in a ceramic industry

Venturelli, Matteo; Brough, Daniel; Milani, Massimo; Montorsi, Luca; Jouhara, Hussam

doi:10.1016/j.ijft.2021.100080

Cited by 29 publications

(14 citation statements)

References 21 publications

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“…However, the raw materials for traditional ceramic plates are mineral resources, which are limited and overexploited [1,2]. Thus, there is a significant tendency for ceramic plates to decrease the thickness to reduce energy consumption and improve the utilization rate of mineral raw materials [3,4]. Consequently, the thickness of large-sized thin architectural ceramic plates is only 3-5 mm, which is 50-85% thinner and 40-53% lower in energy consumption compared to 10-20 mm thick traditional ceramic plates [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of large-sized thin architectural ceramic plate enhanced by alumina fibres and in situ mullite whiskers

Zhong

Cao

Huang

et al. 2022

PAC

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The fibres reinforced thin architectural ceramic plates of 900?1800?2.5mm with excellent mechanical properties were prepared by fast-sintering method using a controllable fibre dispersion process. The effects of ball-milling time on dispersity, average length-to-diameter ratio and microstructure of alumina fibres were investigated. Meanwhile, the effects of alumina fibre contents on the bulk density, water absorption, phase transformation and microstructure of the thin ceramic plate were researched. It was found that the two-step ball-milling process can effectively control the average length-to-diameter ratio of alumina fibres, achieving a good dispersion mixture of fibres and ceramic powders. Ceramics bulk density and bending strength increase with fibre contents rise from 0 to 5 wt.% and then decrease with further fibre content addition from 5 to 15wt.%. The in situ formed mullite whiskers via fast-sintering method are beneficial for protecting fibres and fibre/matrix interfaces. The maximum value of bending strength and fracture toughness reach 147MPa for 5 wt.% fibre contents and 2.6MPa?m1/2 for 9 wt.%fibre contents, corresponding to the strengthening of alumina fibres and the formation of mullite whiskers in fibre/matrix interfaces and matrix via fast-sintering process.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of large-sized thin architectural ceramic plate enhanced by alumina fibres and in situ mullite whiskers

Zhong

Cao

Huang

et al. 2022

PAC

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“…Energy consumption is increasing year by year. Due to the EU's Energy Union strategy introduced to improve energy efficiency and sustainability, as detailed by J. Malinauskaite et al [1], researchers are looking for different solutions to recover waste heat energy [2][3][4][5]. In both industrial and non-industrial sectors, the use of thermoelectric generators (TEGs) is perfectly in line with this trend.…”

Section: Introductionmentioning

confidence: 99%

Investigation and Computational Modelling of Variable TEG Leg Geometries

et al. 2021

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In this work, computational modelling and performance assessment of several different types of variable thermoelectric legs have been performed under steady-state conditions and the results reviewed. The study conducted has covered geometries, not previously analysed in the literature, such as Cone-leg and Diamond-leg, based on the corresponding thermoelectric generator leg shape structure. According to the findings, it has been demonstrated that the inclusion of a variable cross-section can have an impact on the efficiency of a thermoelectric generator. It has been concluded that the Diamond configuration generated a slightly larger voltage difference than the conventional Rectangular geometry. In addition, for two cases, Rectangular and Diamond configurations, the voltage generated by a TEG module consisting of 128 pairs of legs was analysed. As thermal stress analysis is an important factor in the selection of TEG leg geometries, it was observed based on simulations that the newly implemented Diamond-leg geometry encountered lower thermal stresses than the traditional Rectangular model, while the Cone-shape may fail structurally before the other TEG models. The proposed methodology, taking into account the results of the simulation carried out, provides guidance for the development of thermoelectric modules with different forms of variable leg geometry.

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“…The efficiency of heat exchangers in boiler houses depends on the rates of injected water and gas flow and also the height and diameter of the heat exchanger [11]. The use of condensing heat exchangers in boiler plants allows significant annual fuel savings [12,13].…”

Section: Introductionmentioning

confidence: 99%

An Experimental Investigation of Water Vapor Condensation from Biofuel Flue Gas in a Model of Condenser, (2) Local Heat Transfer in a Calorimetric Tube with Water Injection

et al. 2021

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In order for the operation of the condensing heat exchanger to be efficient, the flue gas temperature at the inlet to the heat exchanger should be reduced so that condensation can start from the very beginning of the exchanger. A possible way to reduce the flue gas temperature is the injection of water into the flue gas flow. Injected water additionally moistens the flue gas and increases its level of humidity. Therefore, more favorable conditions are created for condensation and heat transfer. The results presented in the second paper of the series on condensation heat transfer indicate that water injection into the flue gas flow drastically changes the distribution of temperatures along the heat exchanger and enhances local total heat transfer. The injected water causes an increase in the local total heat transfer by at least two times in comparison with the case when no water is injected. Different temperatures of injected water mainly have a major impact on the local total heat transfer until almost the middle of the model of the condensing heat exchanger. From the middle part until the end, the heat transfer is almost the same at different injected water temperatures.

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Comprehensive numerical model for the analysis of potential heat recovery solutions in a ceramic industry

Cited by 29 publications

References 21 publications

Mechanical properties of large-sized thin architectural ceramic plate enhanced by alumina fibres and in situ mullite whiskers

Mechanical properties of large-sized thin architectural ceramic plate enhanced by alumina fibres and in situ mullite whiskers

Investigation and Computational Modelling of Variable TEG Leg Geometries

An Experimental Investigation of Water Vapor Condensation from Biofuel Flue Gas in a Model of Condenser, (2) Local Heat Transfer in a Calorimetric Tube with Water Injection

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