Introduction to energy management

Kent, Robin

doi:10.1016/b978-0-08-102507-9.50001-5

Cited by 10 publications

(18 citation statements)

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“…Increasing the MPP concentration also increases the adsorption percentage to a limiting value that might be caused by steric hindrance among the absorbed MPPs. These experimental observations suggest the existence of strong hydrophobic interactions between the non-polar (e.g., HDPE, PP, LDPE, and PVC) plastic surfaces [29,67,68,102,106] and the hydrophobic "waxy" film on the CFs surface as verified via FTIR (Section 3.1). The experimental evidence obtained in this study suggests that hydrophobic interactions dominate the physisorption process of MPPs onto the hydrophobic surface of CFs.…”

Section: Adsorption Mechanism Of Mpps Onto the Hydrophobic Cfs Surfacementioning

confidence: 72%

“…Figure 7 displays the chemical structures of the plastic materials evaluated in this work. The non-polar nature of PVC, PP, LDPE, and HDPE is well-defined by the chemical structures of these plastics [101,102]. The chemical structure of Nylon 6 reveals its polarity via the amide group, which interacts with surfaces via hydrogen bonding [103].…”

Section: Batch Adsorption Tests Of Mmps Onto Cfsmentioning

confidence: 99%

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Effective Removal of Microplastic Particles from Wastewater Using Hydrophobic Bio-Substrates

Bhagwat,

Rodrigue,

Romero-Zerón

2024

Pollutants

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The rapid increase in soil and water pollution is primarily attributed to anthropogenic factors, notably the mismanagement of post-consumer plastics on a global scale. This exploratory research design evaluated the effectiveness of natural hydrophobic cattail (Typha Latifolia) fibres (CFs) as bio-adsorbents of microplastic particles (MPPs) from wastewater. The study investigates how the composition of the adsorption environment affects the adsorption rate. Straightforward batch adsorption tests were conducted to evaluate the “spontaneous” sorption of MPPs onto CFs. Five MPP materials (PVC, PP, LDPE, HDPE, and Nylon 6) were evaluated. Industrial wastewater (PW) and Type II Distilled Water (DW) were employed as adsorption environments. The batch test results show that CFs are effective in removing five MPP materials from DW and PW. However, a higher removal percentage of MPPs was observed in PW, ranging from 89% to 100% for PVC, PP, LDPE, and HDPE, while the adsorption of Nylon 6 increased to 29.9%, a removal increase of 50%. These findings indicate that hydrophobic interactions drive the “spontaneous and instantaneous” adsorption process and that adjusting the adsorption environment can effectively enhance the MPP removal rate. This research highlights the significant role that bio-substrates can play in mitigating environmental pollution, serving as efficient, sustainable, non-toxic, biodegradable, low-cost, and reliable adsorbents for the removal of MPPs from wastewaters.

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Section: Adsorption Mechanism Of Mpps Onto the Hydrophobic Cfs Surfacementioning

confidence: 72%

Section: Batch Adsorption Tests Of Mmps Onto Cfsmentioning

confidence: 99%

Effective Removal of Microplastic Particles from Wastewater Using Hydrophobic Bio-Substrates

Bhagwat,

Rodrigue,

Romero-Zerón

2024

Pollutants

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“…Not only does the large cooling requirement of these channels contribute to increased operating costs, but it also leads to a gradual development of limescale, dirt, and corrosion over time. These can build up and block the cooling channels, reducing the overall heat transfer coefficient, thus hindering the total heat transfer and resulting in increased cooling times and energy use [5]. For reference, the thermal conductivity of limescale is in an order of magnitude lower than that of tool steel, which obstructs the heat flow from the working fluid to the mold.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Mechanical Optimization of Die Casting Molds Using Topology Optimization and Numerical Simulations

Djabraian,

Teichmann,

Müller

2024

Materials

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Conventional cooling channels used in die casting molds exhibit significant drawbacks, resulting in extended cooling times for cast parts. Issues such as the formation of dirt, limescale, and corrosion substantially diminish the thermal efficiency of these channels, leading to challenges in achieving uniform cooling and potential quality issues. In response to these challenges, this study proposes Topology Optimization as a novel approach. It involves designing cooling structures through Topology Optimization to replace traditional cooling channels, incorporating both Discrete and Gaussian boundary conditions to optimize thermal efficiency. Additionally, Structural Topology Optimization is employed to ensure structural integrity, preventing deformation or yielding under high loads during the die casting process. Numerical analysis revealed superior thermal performance compared to conventional channels, particularly when subjected to Discrete and Gaussian boundary conditions. Furthermore, the application of the latter establishes conformal cooling and minimizes temperature gradients in the casting, reducing casting defects such as shrinkage porosity. These findings highlight the efficacy of Topology Optimization in addressing the challenges of traditional cooling methods, with wide-ranging implications for manufacturing processes utilizing permanent molds for shaping materials.

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“…Desiccant wheels (Figure 4) are based on a wheel with desiccant crystals impregnated and grown on a fiberglass substrate. The lightweight wheel has a high surface-area-toairflow ratio [58]. The desiccant wheel is a passive desiccant wheel or enthalpy wheel when there is no regeneration air heater.…”

Section: Introductionmentioning

confidence: 99%

Desiccant Technologies for Improving Air Quality: An Overview of the Brazilian Scenario and Comparison of Available Design Software for Manufactured Desiccant Wheels

Santiago

Nunes²,

Fontana³

et al. 2023

Processes

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A review of desiccant dehumidification technologies for improving air quality is presented, mainly focusing on alternatives for air conditioning systems for minimizing Sick Building Syndrome. The principles and types of desiccant wheels, as well as the existing selection software for these types of equipment, were reviewed and comparatively evaluated. The study focused on the Brazilian context; thus, information about this country’s air conditioning systems and laws were evaluated. Possible applications of desiccant wheels, such as their integration into cooling cycles and the sensible heat wheel, were also analyzed. Finally, several examples of commercial desiccant wheel selection software that are useful in many situations were evaluated. Nevertheless, it was evidenced that the available software could not perform an operation analysis for only a specific period. Therefore, creating computational tools to select desiccant wheels is essential when considering the data from the different Brazilian regions for a year.

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Introduction to energy management

Cited by 10 publications

References 0 publications

Effective Removal of Microplastic Particles from Wastewater Using Hydrophobic Bio-Substrates

Effective Removal of Microplastic Particles from Wastewater Using Hydrophobic Bio-Substrates

Thermo-Mechanical Optimization of Die Casting Molds Using Topology Optimization and Numerical Simulations

Desiccant Technologies for Improving Air Quality: An Overview of the Brazilian Scenario and Comparison of Available Design Software for Manufactured Desiccant Wheels

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