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  1. Article: Current Status and Future Prospects of Renewable and Sustainable Energy in North America: Progress and Challenges

    Azarpour, Abbas / Mohammadzadeh, Omid / Rezaei, Nima / Zendehboudi, Sohrab

    Energy conversion and management. 2022 June 27,

    2022  

    Abstract: Energy is an important drive for the economic development and social growth. The energy demand has remarkably escalated due to technological developments in various governmental, industrial, and municipal activities. In light of such a fast growth, the ... ...

    Abstract Energy is an important drive for the economic development and social growth. The energy demand has remarkably escalated due to technological developments in various governmental, industrial, and municipal activities. In light of such a fast growth, the fuel prices and control of greenhouse gas emission are the leading driving forces for more effective enhancement in the utilization of renewable energy sources. This reflects the importance of mitigation of global energy demands and climate change, which are the most significant factors in the modern days. In this review paper, a detailed overview in the development and evolution of renewable and sustainable energy supply is provided in terms of their types, characteristics and applications, production processes, advantages, and disadvantages. Moreover, the impacts of the renewable energies on health and environment, along with the relevant policies and regulations are discussed. Further, there is a detailed focus on the emerging technologies, and theoretical and practical challenges in the development of renewable energies are analyzed. Particularly, this review provides information on renewable and sustainable energy status and prospects in North America. Central large-scale technology and distributed configuration of the renewable energies might be improved in the North American countries to effectively utilize the renewable energies to produce electricity, biomass-based fuels, and heating in both local/rural and industrial divisions. In addition to employment opportunities stemmed from manufacturing of the renewable energies, its significant impact on the economic development can be enhanced in all three nations through development of the sources.
    Keywords administrative management ; climate change ; economic development ; electricity ; employment ; energy conversion ; greenhouse gas emissions ; North America
    Language English
    Dates of publication 2022-0627
    Publishing place Elsevier Ltd
    Document type Article
    Note Pre-press version
    ZDB-ID 2000891-0
    ISSN 0196-8904
    ISSN 0196-8904
    DOI 10.1016/j.enconman.2022.115945
    Database NAL-Catalogue (AGRICOLA)

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  2. Article: Reliable Connectionist Tools to Determine Biodiesel Cetane Number based on Fatty Acids Methyl Esters Content

    Ghiasi, Mohammad M. / Mohammadzadeh, Omid / Zendehboudi, Sohrab

    Energy conversion and management. 2022 Apr. 07,

    2022  

    Abstract: The self-ignition ability of fuels is characterized using a property called cetane number (CN). The main objective of this research work is to develop accurate models using smart algorithms to predict the CNs associated with 149 samples of biofuels ... ...

    Abstract The self-ignition ability of fuels is characterized using a property called cetane number (CN). The main objective of this research work is to develop accurate models using smart algorithms to predict the CNs associated with 149 samples of biofuels collected from the literature. In this study, we use two machine learning (ML) algorithms, namely least squares support vector machine (LSSVM) and extra trees (ET) and an experimental dataset containing a variety of fatty acids methyl esters (FAME). To assess the predictive performance of the developed models, various statistical parameters including average relative deviation in percentage (ARD%), average absolute relative deviation in percentage (AARD%), and coefficient of determination (R²) are calculated. The statistical and graphical analyses presented in this study reveal that the ET model outperforms the LSSVM model in predicting the CN associated with the biodiesel systems from the collected dataset so that the value of AARD% is less than 3% for the ET method. It is also found that Linoleic (18:02) is the most important factor affecting the CN magnitude of biodiesels. According to the sensitivity analysis, the CN value decreases upon an increase in the concentration of Palmitoleic (16:01), Oleic (18:01), Linoleic (18:02), and Linolenic (18:03); this is in agreement with the experimental studies. The smart modelling techniques used in this study can be utilized as alternative methods to direct measurements for determination of biodiesel CN.
    Keywords administrative management ; biodiesel ; data collection ; energy conversion ; models ; support vector machines
    Language English
    Dates of publication 2022-0407
    Publishing place Elsevier Ltd
    Document type Article
    Note Pre-press version
    ZDB-ID 2000891-0
    ISSN 0196-8904
    ISSN 0196-8904
    DOI 10.1016/j.enconman.2022.115601
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Modeling Approach to Determine Static Rivulet Height in Regular Polygonal Capillary Tubes.

    Kialashaki, Mansureh / Amin, Javad Sayyad / Mohammadzadeh, Omid / Zendehboudi, Sohrab

    ACS omega

    2022  Volume 7, Issue 11, Page(s) 9310–9321

    Abstract: The rise of partially wetting liquids along the corners of noncircular capillary tubes is observed in many practical science and engineering applications such as wastewater treatment using membranes, remediation, oil recovery from petroleum reservoirs, ... ...

    Abstract The rise of partially wetting liquids along the corners of noncircular capillary tubes is observed in many practical science and engineering applications such as wastewater treatment using membranes, remediation, oil recovery from petroleum reservoirs, and blood flow. In this paper, rivulet rise at the corners of polygonal capillary tubes is studied for partially wetting liquids with contact angles below the critical value. The presence of corners changes the distribution of a liquid in an incomplete wetting condition. In this study, geometrical models are proposed to better understand the capillary rise and flow behavior at the corners. A geometrical solution for the capillary rivulet height and profile is derived under gravity in triangular, square, and pentagonal capillary tubes. The effects of several factors including contact angle, number of polygon sides, and liquid properties on the capillary rivulet height are examined. It was found that the ratio of liquid surface tension to density directly affects the corner rise, while it has an inverse relationship with other factors. The maximum rivulet height of 91.6 mm is obtained in the triangular capillary tube with a side length of 1 mm and a contact angle of 30° for polydimethylsiloxane (PDMS-20)-air fluid pair. The minimum capillary rivulet height of 6.2 mm, on the other hand, is achieved in the pentagonal capillary tube, with a side length of 3 mm and a contact angle of 30°. To validate the developed analytical approach, comparisons are made between the model results, literature predictions, and experimental data. In addition, the geometrical model for a square capillary tube is compared with previous published studies, revealing a good agreement. This study provides quantitative results for the influence of capillary tube shape on the flow behavior of fluids in noncircular tubes that can be useful for control and optimization of transport phenomena in corresponding systems.
    Language English
    Publishing date 2022-03-14
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.1c06141
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: A Review on Microalgal Biomass and Biodiesel Production through Co-cultivation Strategy

    Azarpour, Abbas / Zendehboudi, Sohrab / Mohammadzadeh, Omid / Reza Rajabzadeh, Amin / Chatzis, Ioannis

    Energy conversion and management. 2022 May 11,

    2022  

    Abstract: The adverse impacts of fossil fuels on the environment, specifically climate change, have intensified the need for finding a sustainable alternative source of energy. Numerous studies have postulated that biotechnology development, focusing on biofuel ... ...

    Abstract The adverse impacts of fossil fuels on the environment, specifically climate change, have intensified the need for finding a sustainable alternative source of energy. Numerous studies have postulated that biotechnology development, focusing on biofuel production processes, could be a suitable solution for sustainable energy production. The utilization of microorganisms, such as microalgae, is one of the basic strategies to produce biodiesel, pharmaceuticals, and nutraceuticals. Co-cultivation has overtaken mono-cultivation to improve the production of microalgae due to its endurance, foreseeability, and stability. However, further development of the co-cultivation process requires elaborate efforts to make it safe, practical, and optimal. Some dominant factors affecting the co-culture system control are the diversity of the cell groups, mass transfer, scale-up, population ratio, and time. In this review article, we will discuss some critical topics related to the co-cultivation process, such as data collection, modelling, cultivation methods, and interaction varieties. An overview of the quantification techniques for biomass concentration and lipid content is also provided. Moreover, the utilization of microalgal co-cultures will be analyzed, depicting the difficulties associated with their efficient control. As knowledge of the reactions and their entailing kinetics is elemental for analyzing the microalgal systems, which are used to synthesize intermediate products and chemicals, some studies focusing on the kinetics of microalgal biomass conversion into biofuels are presented. Moreover, since the microbial fuel cells (MFCs), as a new bioelectrochemical process, are utilized in the mixed-culture systems to treat wastewater and produce biofuels and other valuable by-products, a summary of the microalgal MFCs is also provided. Finally, arguments about the challenges and advantages of the co-cultivation systems are presented.
    Keywords administrative management ; algae culture ; biodiesel ; biomass ; climate change ; coculture ; data collection ; dietary supplements ; drugs ; energy conversion ; fuel production ; lipid content ; mass transfer ; microalgae ; mixed culture ; wastewater
    Language English
    Dates of publication 2022-0511
    Publishing place Elsevier Ltd
    Document type Article
    Note Pre-press version
    ZDB-ID 2000891-0
    ISSN 0196-8904
    ISSN 0196-8904
    DOI 10.1016/j.enconman.2022.115757
    Database NAL-Catalogue (AGRICOLA)

    Full text online

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