Enhanced thermo-mechanical properties of cementitious composites via red mud-based microencapsulated phase change material: Towards energy conservation in building

Yu, Kunyang; Jia, Minjie; Tian, Weichen; Yang, Yingzi; Liu, Yushi

doi:10.1016/j.energy.2024.130301

Cited by 25 publications

(3 citation statements)

References 70 publications

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“…The optimization of water, heat, and electricity was addressed in [ 23 ] and the optimization of nitrogen dioxide in [ 18 ], as well as in work [ 24 ]. The work [ 25 ] suggests that incorporating micro-encapsulated phase change materials (PCMs) into cement contributes to the reduction of energy consumption in buildings. In an extension of this work [ 26 ], a PCM based on decanoic acid/polyethylene glycol is created.…”

Section: Related Workmentioning

confidence: 99%

Data-Driven AI Models within a User-Defined Optimization Objective Function in Cement Production

Manis,

Skoumperdis,

Kioroglou

et al. 2024

Sensors

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This paper explores the energy-intensive cement industry, focusing on a plant in Greece and its mill and kiln unit. The data utilized include manipulated, non-manipulated, and uncontrolled variables. The non-manipulated variables are computed based on the machine learning (ML) models and selected by the minimum value of the normalized root mean square error (NRMSE) across nine (9) methods. In case the distribution of the data displayed in the user interface changes, the user should trigger the retrain of the AI models to ensure their accuracy and robustness. To form the objective function, the expert user should define the desired weight for each manipulated or non-manipulated variable through the user interface (UI), along with its corresponding constraints or target value. The user selects the variables involved in the objective function based on the optimization strategy, and the evaluation is based on the comparison of the optimized and the active value of the objective function. The differential evolution (DE) method optimizes the objective function that is formed by the linear combination of the selected variables. The results indicate that using DE improves the operation of both the cement mill and kiln, yielding a lower objective function value compared to the current values.

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Section: Related Workmentioning

confidence: 99%

Data-Driven AI Models within a User-Defined Optimization Objective Function in Cement Production

Manis,

Skoumperdis,

Kioroglou

et al. 2024

Sensors

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show abstract

“…(5) Energy storage applications The organic components in SS and RM can be used as excellent TES materials after specific treatment [102]. This application method not only improves energy efficiency, but also further reduces carbon emissions in the sludge treatment process, opening up a new means of carbon emission reduction and the utilization of SS and RM.…”

Section: Recycling Optionsmentioning

confidence: 99%

“…Afolabi et al [136] encapsulated paraffin PCM with expanded graphite and compounded it with an RM polymer, using vacuum impregnation technology, to prepare thermal comfort materials for the construction industry, and concluded that the combination of PCM and additives of red mud and an alkaline activator can successfully develop a unique composite material for building walls. Yu et al [102] used capric acid and paraffin as a PCM (LH value of 143.4 J/g) and micro-encapsulated it with nano-silica and RM, and added it to cement mortar to improve the energy efficiency of buildings, with the conclusion that RM-based ESCs have a good TES capacity (73.5 J/g), chemical compatibility, and thermal stability. Anagnostopoulos et al [137] used RM as the SM, and solar salt (60% NaNO 3 and 40% KNO 3 ) as the PCM, to prepare RM-solar salt ESCs for medium-and high-temperature TES and waste heat recovery and utilization; the results show that the maximum LH of the ESCs is 58 J/g, and the TES density is calculated to be up to 1396 MJ/m 3 , which demonstrates that the composite material is an ideal TES material.…”

Section: Red Mud Energy Storage Compositesmentioning

confidence: 99%

A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

Xiong,

Zhang,

Zhao

et al. 2024

Energies

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Sewage sludge and red mud, as common industrial waste, have become a research hotspot in the field of achieving carbon peaking and carbon neutrality, reducing carbon emissions, and solving environmental problems. However, their treatment and disposal have always been a difficult problem in the environmental field. Utilizing these two materials for thermal energy storage can not only improve energy utilization efficiency but also further reduce carbon emissions during their treatment process, providing a new approach for sustainable development in the industrial sector. This article summarizes the research progress for the resource recovery of sewage sludge and red mud for direct thermal energy recovery and composite phase change energy storage. After proper treatment, sludge and red mud can be directly used as energy storage materials. In addition, sludge and red mud can be combined with phase change materials to prepare composite materials with an excellent energy storage performance. This composite has broad application prospects in fields such as solar energy utilization and building energy efficiency. However, there are still some challenges and issues in this resource recovery and utilization, such as potential environmental pollution during the treatment process, the long-term stability of energy storage materials, and cost-effectiveness, which require further research and resolution. The purpose of this paper is to evaluate the potential of sewage sludge and red mud as energy storage materials, to explore their feasibility and advantages in practical applications, and to reveal the research progress, technical challenges, and future development directions of these two materials in the field of thermal energy storage.

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Exploring the potential of fly ash cenosphere—capric acid composite phase change material in concrete incorporating supplementary cementitious material

Sivasubramani,

Srisanthi

2024

Structural Concrete

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Increasing demand for energy globally, with the building sector being a significant contributor to energy consumption, is a major issue. To address this, efforts are being made to make buildings more energy efficient, including lowering the demand for heating, ventilation, and air conditioning to decrease energy demand. Phase change material (PCM) functions as a latent heat energy storage material that absorbs heat energy while transforming its phase from solid to liquid and then releases the heat energy when it transforms from liquid to solid state. Integrating PCM into building materials can considerably enhance their energy storage density. In this study, the potential of using fly ash cenosphere—capric acid (CeCA) composite PCM in concrete is evaluated. The mechanical, durability and thermal properties of the CeCA blended concrete were investigated. Furthermore, the CeCA‐concrete is enhanced with auxiliary cementitious substance, namely ground granulated blast furnace slag (GGBS). The optimal proportion of CeCA was determined to ensure a balance of compressive strength and thermal conductivity. The results indicated that the compressive strength of the CeCA blended concrete lowered with an increase in the percentage of CeCA. The thermal conductivity of the concrete specimen was lowered by 33.14% at a 25% incorporation of CeCA, resulting in improved thermal performance. The incorporation of GGBS has enhanced the mechanical and durability performance of CeCA‐Concrete. The optimal concrete specimen was found to be 25% CeCA +40% GGBS, which had greater thermal efficiency than the control specimen with similar strength performance. The findings were validated by field emission scanning electron microscopy analysis of the concrete specimen.

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Enhanced thermo-mechanical properties of cementitious composites via red mud-based microencapsulated phase change material: Towards energy conservation in building

Cited by 25 publications

References 70 publications

Data-Driven AI Models within a User-Defined Optimization Objective Function in Cement Production

Data-Driven AI Models within a User-Defined Optimization Objective Function in Cement Production

A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

Exploring the potential of fly ash cenosphere—capric acid composite phase change material in concrete incorporating supplementary cementitious material

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