Article
Green & Sustainable Science & Technology
Richard Kingsley Padi, Annie Chimphango
Summary: The study assesses the long-term greenhouse gas mitigation and economic impacts of integrating bioenergy from cassava residues into the national energy mix in South Africa. It shows significant emission savings in scheme (I) compared to scheme (III) and potential cost increments based on the existing energy scheme. The bioenergy schemes (I) and (II) exemplify sustainable national bioenergy models for enhancing low-carbon economies.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Green & Sustainable Science & Technology
Ilaria Perissi, Gianluca Martelloni, Ugo Bardi, Davide Natalini, Aled Jones, Angel Nikolaev, Lukas Eggler, Martin Baumann, Roger Samso, Jordi Sole
Summary: The study compares energy transition scenarios from different integrated assessment models in depicting the transition in Austria and Bulgaria, finding good agreement in historical trends but major discrepancies when increasing renewable energy implementation for decarbonization, mainly due to differences in models' conception and structures.
Article
Green & Sustainable Science & Technology
Juyeon Kim, Hoyoung Park, Jeehoon Han, Jechan Lee
Summary: This study explores a co-production process that converts volatile fatty acids (VFA) derived from anaerobic digestion of organic waste into ethanol (EtOH) and butanol (BuOH) as potential gasoline alternatives. The process integration of acetic acid to EtOH and butyric acid to BuOH is investigated at a large scale to improve energy efficiency and economics. The simulation results show a high overall (EtOH + BuOH)/VFA mass yield of 46.2% and a significant energy efficiency of 37.3%, with most of the heat requirements being fulfilled internally. The techno-economic feasibility of the co-production process is estimated to be US$ 5.29 per gallon of gasoline equivalent.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Theophilus Nii Odai Mensah, Ayobami Solomon Oyewo, Christian Breyer
Summary: This study explores the grid balancing role of bioenergy in a fully renewable power sector in sub-Saharan Africa, using Ghana as a case study. Results indicate that bioenergy can contribute to electricity production for grid balancing, with relatively low costs, showing potential for sustainable development in the region.
Article
Energy & Fuels
Soley Akcaba, Fehiman Eminer
Summary: This article presents an integrated approach to identifying strategic energy alternatives for Northern Cyprus. Through SWOT analysis, ANP weighting, and FTOPSIS ranking, alternative energy strategies were evaluated and ranked. The results highlight the preference of decision-makers in the Northern Cyprus energy sector for establishing an interconnected connection to the mainland.
Article
Engineering, Environmental
Simin Tazikeh, Sohrab Zendehboudi, Samira Ghafoori, Ali Lohi, Nader Mahinpey
Summary: With increasing demand for energy and growing environmental pollution, industries are seeking alternative energy sources to replace fossil fuels. Algal bioenergy has emerged as a renewable energy source in various industries. However, the production of algal bioenergy is costly and faces numerous challenges and unknown factors. This review paper examines the potential of microalgae bioenergy production, influential parameters, previous studies, and different methods for microalgae biofuel production. The findings suggest that innovative engineering methods can overcome scalability challenges, increase production rate, and reduce costs.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Jeremy Twitchell, Kyle DeSomber, Dhruv Bhatnagar
Summary: Accelerating the deployment of variable renewable energy is creating an emerging need for storage technologies with extended energy-duration capabilities to maintain grid reliability. This study reviews current uses of energy storage and assesses how the power generation industry and academia are defining long-duration storage. It concludes that two classes of long-duration energy storage will be needed in a decarbonized grid: one lasting up to 20 hours to manage daily cycles and one lasting for weeks or months to manage seasonal cycles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Multidisciplinary Sciences
Beyzanur Cayir Ervural
Summary: Fuzzy goal programming is a significant optimization tool for energy management decisions involving various stakeholders. Prioritizing green energy resources and analyzing their societal impacts are crucial for developing optimal investment plans. This study presents a practical decision model to achieve a balance between energy consumption and production quantities for sustainable development.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2021)
Review
Environmental Sciences
Tianqi Liu, Pengyun Miao, Yang Shi, Kuok Ho Daniel Tang, Pow-Seng Yap
Summary: This paper presents recent advances and limitations in bioenergy production, covering both thermochemical and biochemical processes. The combination of these processes can overcome individual shortcomings, while the choice of feedstock plays a key role in production efficiency. Future research will focus on technological development and sustainability assurance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Green & Sustainable Science & Technology
Patience Afi Seglah, Yajing Wang, Hongyan Wang, Komikouma Apelike Wobuibe Neglo, Chunyu Gao, Yuyun Bi
Summary: This study quantified the availability and energy potential of crop straws in different regions of Ghana, highlighting the highest potential in yam, groundnut, maize, and soybean. The research emphasized the sustainability of crop straws as bioenergy and conducted a life cycle assessment to explore the environmental sustainability of crop straw-based power generation.
Review
Agricultural Engineering
S. Thanigaivel, Saravanan Rajendran, Tuan K. A. Hoang, Awais Ahmad, Rafael Luque
Summary: Compared to other hydrogen production methods, biohydrogen produced from biological origin like microalgae is significantly less harmful to the surrounding ecosystem and can replace conventional fossil fuels without emitting greenhouse gases. Substrates like food, agricultural waste, and industrial waste can be easily utilized after pretreatment, increasing hydrogen yield. Improving biofuel production at each stage can have a significant impact, making it a potentially useful tool. Thus, this study comprehensively covers various approaches to pretreat algal biomass, enzymes and catalysts for hydrogen production, variables influencing hydrogen production, and the potential applications of genetic engineering.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Benjamin P. Riley, Prodromos Daoutidis, Qi Zhang
Summary: This article introduces a model that combines chemical energy storage and electrochemical energy storage as a non-wires alternative to optimize the design and operation of distribution systems. By applying this model in a case study, it is found that ammonia-powered generators are suitable for long-term, high-total-energy use cases, while batteries are suitable for short-term use.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Wenna Ai, Wei-Hai Fang, Neil Qiang Su
Summary: This study focuses on the range-separated correlation in long-range corrected hybrid functionals, presenting a theory on its derivation and proving its reliability and effectiveness. The new functional proposed in this work outperforms the traditional LC-BLYP method in various tests and maintains important properties of the XC potential.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Green & Sustainable Science & Technology
Muhammad Shahid, Kafait Ullah, Kashif Imran, Arshad Mahmood, Maarten Arentsen
Summary: Several planning problems in the power sector of Pakistan, including gradual reliance on expensive energy sources, supply shortages, circular debt, have hindered the growth of allied economic sectors. Using the LEAP system, this study simulated Pakistan's electrical system and analyzed different scenarios based on technoeconomic and environmental parameters. The study suggests prioritizing the use of indigenous and renewable energy resources to alleviate the energy crisis.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Chemistry, Analytical
Georgios Papaioannou, Zaw Htike, Chenhui Lin, Efstathios Siampis, Stefano Longo, Efstathios Velenis
Summary: This paper presents the application of motion planning in automated vehicles to minimize motion sickness. By seeking the optimum velocity profile, a balance is achieved between reducing motion sickness and optimizing journey time.
Article
Economics
Wikus Kruger, Ivan Nygaard, Lena Kitzing
Summary: The use of competitive bidding programmes or auctions for procuring utility-scale renewable energy generation capacity has led to cost reductions of renewable energy technologies. While market concentration was observed in South Africa's renewable energy auction programme, it did not have a negative impact on project pricing or market development. Providing preferential conditions for small, local players has been more effective at counteracting market concentration than lowering entry barriers overall. Policy certainty and predictability are more crucial in countering market concentration and dominance than auction design measures.
Article
Green & Sustainable Science & Technology
Nii Nelson, Jo Darkwa, John Calautit, Mark Worall, Robert Mokaya, Eunice Adjei, Francis Kemausuor, Julius Ahiekpor
Summary: This study investigates the potential of using crop residues in rural Ghana for rural development, with a focus on cocoa pod husks as important biomass resources. Through thermo-chemical analysis, it was found that cocoa pod husks have high heating value and are environmentally friendly.
Article
Energy & Fuels
Kimball C. Chen, Matthew Leach, Mairi J. Black, Meron Tesfamichael, Francis Kemausuor, Patrick Littlewood, Terry Marker, Onesmus Mwabonje, Yacob Mulugetta, Richard J. Murphy, Rocio Diaz-Chavez, John Hauge, Derek Saleeby, Alex W. Evans, Elisa Puzzolo
Summary: The feasibility of bioLPG technology in providing clean cooking energy solutions for Sub-Saharan Africa has been demonstrated, utilizing biogas and syngas from municipal solid waste and agricultural waste. This technology has the potential to significantly contribute towards achieving a green economy and universal energy access in Africa.
Article
Energy & Fuels
Mairi J. Black, Amitava Roy, Edson Twinomunuji, Francis Kemausuor, Richard Oduro, Matthew Leach, Jhuma Sadhukhan, Richard Murphy
Summary: Anaerobic digestion technology can effectively manage organic waste, recover energy and nutrients, but faces challenges in developing countries due to inadequate natural gas and electricity grid infrastructure.
Article
Environmental Studies
Elder Davy, Ulrich E. Hansen, Ivan Nygaard
Summary: This study examines the learning and capability-building trajectory of an MNC subsidiary in the market for solar power in South Africa, filling a research gap in the development of innovation capabilities in developing-country firms. The subsidiary managed to achieve an advanced level of innovation capabilities in a short period through interaction with the parent company and internal learning. The findings are relevant for 'born global' MNCs in the global market for renewable energy and highlight the importance of regulatory conditions in shaping knowledge transfer and capability building.
ENERGY RESEARCH & SOCIAL SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Uchechukwu Stella Ezealigo, Blessing Nonye Ezealigo, Francis Kemausuor, Luke Ekem Kweku Achenie, Azikiwe Peter Onwualu
Summary: The bioenergy sector in Nigeria lacks a proper assessment of resource availability. A study on the bioenergy potential of agricultural residues and municipal waste in Nigeria showed that biogas has higher energy generation potential compared to cellulosic ethanol under the same conditions. Biogas has diverse applications, from heat to electricity generation, making it a promising solution to Nigeria's current electricity crisis.
Article
Development Studies
Ulrich Elmer Hansen, Ivan Nygaard, Mike Morris, Glen Robbins
Summary: Services play a crucial role in global value chains, but limited research has been conducted on this topic. This paper contributes to the literature by analyzing the development of an industry supplying wind-turbine services in South Africa, showcasing the upgrading pathways of local service suppliers in knowledge-intensive and high value-added service activities.
JOURNAL OF DEVELOPMENT STUDIES
(2022)
Article
Economics
Lena Kitzing, Muhammad Bilal Siddique, Ivan Nygaard, Wikus Kruger
Summary: This study compares renewable energy auctions in South Africa and European countries and assesses their effectiveness and efficiency. The research finds that South Africa has a higher realization rate due to a strong compliance package, while European countries have moderate realization rates with lenient compliance packages. The study also observes that project size is correlated with realization periods.
Article
Environmental Studies
Mark Swilling, Ivan Nygaard, Wikus Kruger, Holle Wlokas, Tasneem Jhetam, Megan Davies, Merin Jacob, Mike Morris, Glen Robbins, Mikkel Funder, Ulrich Elmer Hansen, Karen Holm Olsen, Elder Davy, Lena Kitzing, Bilal Siddique Khan, Tom Cronin
Summary: This paper examines the linkages between the deployment of large scale solar and wind technologies and economic development in the global south, with a focus on the South African energy transition as a case study. The paper highlights the complex interaction between highly globalized value chain actors, path dependent local institutions, and the interests of incumbent local actors, shedding new light on the dynamics of institutional change during energy transitions. The study develops a framework for analyzing energy transitions in the global south, emphasizing the role of rule-setting and the actions of actors within institutions in enabling financial flows, institutional change, and socio-technical adaptation.
ENERGY RESEARCH & SOCIAL SCIENCE
(2022)
Article
Development Studies
Ulrich Elmer Hansen, Padmasai Lakshmi Bhamidipati, Mathilde Brix Pedersen, Ivan Nygaard, Hope Nyambura Njoroge
Summary: This article addresses the knowledge gap in global value chain (GVC) research by examining the relationship between business strategies and upgrading pathways of 14 firms in the solar system value chain in Kenya. The findings reveal that local firms pursue different upgrading pathways to remain competitive, and the underlying business strategies that drive their choices. The article contributes to overcoming the lack of attention given to local firms undergoing upgrading processes in existing GVC literature.
DEVELOPMENT POLICY REVIEW
(2023)
Article
Green & Sustainable Science & Technology
Patience Afi Seglah, Komikouma Apelike Wobuibe Neglo, Hongyan Wang, Dan Cudjoe, Francis Kemausuor, Chunyu Gao, Yuyun Bi, Yajing Wang
Summary: This paper assesses the greenhouse gas mitigation potential and economic impact of electricity generated from major food crop residues in Ghana. The results show that biomass-based electricity generation has the potential to contribute significantly to Ghana's renewable energy targets and climate change mitigation efforts.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Multidisciplinary Sciences
Isaac Osei, Ahmad Addo, Francis Kemausuor
Summary: This study used multiple-criteria decision-making methods to select the optimal crop residues for sustainable gasification in Ghana. The results showed that cassava peels were the best alternative, and the combination of multiple residues was more favorable than individual feedstock for sustainable gasification.
Article
Thermodynamics
Akwasi Adu-Poku, God'sable Sitsofe Koku Aidam, Godfrey Atta Jackson, Kokouvi Edem N'tsoukpoe, Jerry John Kponyo, Adamah Messan, Ozioma Ikonne, Wofa Kwarteng, Francis Kemausuor
Summary: This study assessed the performance of mini-grids in five island communities in Ghana's Volta Lake and emphasized the importance of system maintenance, load management, and the impact of climate change on mini-grid reliability and sustainability.
Article
Business
Mike Morris, Glen Robbins, Ulrich Hansen, Ivan Nygard
Summary: This study examines the wind energy value chain in South Africa, highlighting the dependence of governance on system integration dynamics and how policy failures disrupted renewable energy projects and industrial policies. The key lessons learned are: global value chain dynamics and lead firms are crucial for localization efforts, green strategies should be integrated into industrial policies, localization should start with lead firms and developing domestic value-added services is equally important as manufacturing enterprises.
JOURNAL OF INTERNATIONAL BUSINESS POLICY
(2022)
Article
Economics
Ulrich Elmer Hansen, Ivan Nygaard, Mirko Dal Maso
Summary: This article discusses the potential dark side of increased disposal of off-grid solar e-waste in the Global South, suggesting research on appropriate schemes for collection and recycling of SEW. By integrating insights from social anthropology and life-cycle assessments into the global value chains framework, it aims to integrate end-user behavior and waste disposal. The study demonstrates how this conceptual framework could be applied in Kenya as an example of a regional hotspot for solar e-waste, proposing three separate research areas to inform national SEW policies and regulations.
INDUSTRY AND INNOVATION
(2021)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
