Article
Thermodynamics
Battal Dogan, Mehmet Celik, Cihan Bayindirli, Dervis Erol
Summary: This paper investigated the influence of titanium dioxide (TiO2) and silver oxide (Ag2O) nanoparticles additives on biodiesel fuel obtained from cottonseed oil. The fuel blends formed by nanoparticles with biodiesel fuel were evaluated in terms of performance and emissions. The results showed that adding nanoparticles to biodiesel fuel increased thermal efficiency and exergy efficiency, and decreased total exergy losses in fuel blends.
Article
Energy & Fuels
Dervis Erol, Murat Kadir Yesilyurt, Hayri Yaman, Battal Dogan
Summary: The research evaluated the usability of diesel-biodiesel and diesel-biodiesel-hexanol fuel blends as alternatives to diesel fuel in a compression ignition engine. Energy and exergy analyses were conducted and the sustainability index was calculated. The results showed that the diesel-biodiesel binary fuel blend was the most suitable alternative fuel, with higher thermal efficiency, exergy efficiency, and sustainability index values compared to pure diesel fuel. The sustainability index decreased with an increase in alcohol and hexanol ratios in the fuel blends.
Article
Chemistry, Multidisciplinary
Chandrabhushan Tiwari, Tikendra Nath Verma, Gaurav Dwivedi, Puneet Verma
Summary: Renewable energy is gaining more attention due to the depletion of fossil fuel reserves. In this study, Spirulina microalgae were used as feedstock for biodiesel production. Energy and exergy analysis were conducted on a diesel engine using different fuel blends. The results showed that the exergy efficiency of pure diesel was higher than that of biodiesel blends. The study also found that the engine's sustainability index was associated with exergy efficiencies.
APPLIED SCIENCES-BASEL
(2023)
Article
Thermodynamics
Suleyman Simsek, Gursah Guruf, Samet Uslu, Hatice Simsek
Summary: In this study, the exergy, exergoeconomic, enviroeconomic, and sustainability index analyses of biodiesel and diesel blends obtained from waste animal fats were conducted. The experiment utilized a fixed-speed four-stroke, single-cylinder, and air-cooled compression ignition engine operating at engine loads between 500 and 3000 W. The results showed that the highest exergy efficiency, lowest relative cost difference, and maximum sustainability index value were obtained in the D90B10 fuel at a 3000 W engine load. Regarding enviroeconomics, the cost of annual CO2 emission was found to increase with engine load, with D90B10 fuel being closest to D100 fuel at low engine loads.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Green & Sustainable Science & Technology
Akshay Jain, Bhaskor Jyoti Bora, Rakesh Kumar, Prabhakar Sharma, Hiranya Deka
Summary: The study investigates the influence of injection timing and load on the performance, exergy, and emission analysis for a Water Hyacinth biodiesel-run diesel engine. Response Surface Methodology (RSM) is used to model and predict the optimal operating parameters. The results show that an injection timing of 20 degrees bTDC leads to improved fuel conversion efficiency, reduced exergy destruction, and lower emissions for the biodiesel-run diesel engine.
Article
Thermodynamics
M. Gowthama Krishnan, Sundararajan Rajkumar
Summary: This experimental study investigates the effects of dual fuel combustion of isobutanol on the performance, emission, and energy-exergy characteristics of an off-road diesel engine. The results show that the dual fuel combustion of isobutanol can improve the thermal efficiency and reduce the emissions of carbon monoxide and nitrogen oxides. Additionally, at a certain premixed energy ratio, the dual fuel combustion of B20 isobutanol has a positive effect on improving the energy-exergy efficiency.
Article
Green & Sustainable Science & Technology
Saket Kumar, Raghvendra Gautam
Summary: Exergy-energy analysis of biodiesel and baseline diesel was compared at various engine design variables to determine optimal operating conditions for efficient combustion of B20 blend fuel. The results showed that energy efficiency was 31.69% at a compression ratio of 17.5 and injection pressure of 210 bar, with the maximum efficiency observed for diesel at 32.67%. Based on the data analysis, it is suggested that B20 tallow-based biodiesel can be used as an efficient and sustainable fuel.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Thermodynamics
Juan Zapata-Mina, Alvaro Restrepo, Juan Esteban Tibaquira
Summary: This study evaluated the performance of low glyceride palm oil biodiesel blended with diesel fuel in a compression ignition engine through experimental analysis of exergy, emissions, and combustion characteristics. The results showed that higher concentrations of CO and CO2 were obtained for B10, while lower concentrations of NOx were found for B20 and B50. Increasing the fuel blend improved the combustion process by enhancing premixed burning and reducing diffuse burning. Decreasing the glyceride content in biodiesel resulted in adequate performance, significant emission reduction, and homogeneous combustion when blended with conventional diesel.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Environmental Sciences
Sama Amid, Mortaza Aghbashlo, Wanxi Peng, Ali Hajiahmad, Bahman Naja, Hassan S. Ghaziaskar, Hajar Rastegari, Pouya Mohammadi, Homa Hosseinzadeh-Bandbafha, Su Shiung Lam, Meisam Tabatabaei
Summary: This study investigated the performance of a diesel engine running on fuel mixtures with EGDA from exergoeconomic and exergoenvironmental perspectives. The results showed that engine load significantly influenced the exergetic parameters, and adding EGDA to fuel mixtures did not improve the engine's performance due to its energy-intensive and cost-prohibitive production process. Overall, the adverse effects of additives on thermodynamic parameters of diesel engines, especially on exergoeconomic and exergoenvironmental indices, should be considered before real-world application.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Thermodynamics
Battal Dogan, Dervis Erol
Summary: This study examines the energy and exergy performance of biodiesel as an alternative fuel in diesel engines. It finds that while biodiesel decreases engine power, it improves emissions. The exergy efficiency of biodiesel fuel blends is lower compared to pure diesel fuel, and the addition of nanoparticles can decrease exergy destruction and increase useful work.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Green & Sustainable Science & Technology
Mostafa Kiani Deh Kiani, Sajad Rostami, Gholamhassan Najafi, Mohamed Mazlan
Summary: Exergy analysis was conducted on a direct-injection diesel engine using biodiesel-diesel fuel blends, showing differences in exergy parameters for fuel mixtures at different injection pressures. Increasing biodiesel concentration in fuel blends led to higher exergy and energy efficiencies at higher injection pressures.
Article
Green & Sustainable Science & Technology
V Praveena, M. Leenus Jesu Martin, Edwin Geo Varuvel
Summary: This experimental work addresses the challenges of waste management by converting biomass waste into useful fuel for internal combustion engines. The study analyzes the effects of different piston shapes and nozzle profiles on the energy and exergy rates of an engine running on grapeseed oil methyl ester blended with cerium oxide nano particles. The results show that adjusting the nozzle shape and hole number can improve the energy efficiency and exergetic efficiency of the engine, while reducing exhaust emissions.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Aman Singh Rajpoot, H. Chelladurai, Akhilesh Kumar Choudhary, Balram Ambade, Tushar Choudhary
Summary: This study analyzes the energy, exergy, sustainability, and emission performance of a Botryococcus braunii microalgae biodiesel blended with three different nanoparticles in a diesel engine system. The inclusion of nanoparticles improves combustion efficiency and energy utilization efficiency, but increases NOx emissions. Additionally, nanoparticles reduce particulate matter emissions and exergy destruction.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Energy & Fuels
Aman Singh Rajpoot, Tushar Choudhary, H. Chelladurai, Tikendra Nath Verma, Arivalagan Pugazhendhi
Summary: The present study analyzes the sustainability of spirulina microalgae biodiesel and evaluates its energy-exergy-emission (3E) performance in a diesel engine. The results indicate that spirulina biodiesel has similar sustainability index to diesel and shows potential as an alternative fuel.
Article
Thermodynamics
Ibrahim Yildiz, Hakan Caliskan, Kazutoshi Mori
Summary: The study showed that diesel-fueled engine has higher power than biodiesel-fueled engine; SiC-DPF has a positive impact on emissions of biodiesel-fueled engine but not on diesel-fueled engine; Biodiesel-fueled engine has higher energy and exergy efficiencies compared to diesel-fueled engine.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Green & Sustainable Science & Technology
Hadi Taghavifar, Sinnin Anvari
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2020)
Article
Energy & Fuels
Simin Anvari, Umberto Desideri, Hadi Taghavifar
Article
Energy & Fuels
Francisco Javier Salvador, Joaquin De la Morena, Hadi Taghavifar, Arash Nemati
Article
Energy & Fuels
Hadi Taghavifar, Simin Anvari, S. H. Mousavi
Article
Thermodynamics
Hadi Taghavifar
Summary: This study focuses on the importance of considering radiation heat transfer in numerical computations, comparing the heat transfer effects in different modes to reveal the differences between convection and radiation heat transfer.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Hadi Taghavifar, Behzad Koozegar Kaleji, Javad Kheyrollahi
Article
Chemistry, Physical
Hadi Taghavifar, Hamid Taghavifar
Summary: Energy management of hybrid photovoltaic (PV)-battery systems is a challenging task due to their complex and nonlinear characteristics, but a novel adaptive robust control framework has been proposed in this study to optimize the system's performance. This framework ensures global asymptotic stability and improved transient performance compared to benchmark studies.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Hadi Taghavifar, Shahram Khalilarya, Samad Jafarmadar
Summary: Mixing dynamics play a crucial role in the combustion process of fuels in thermal systems, affecting energy conversion and emission concentrations in diesel engines. This study proposes a new analytical approach for quantifying mixture uniformity in the cylinder using statistical means, leading to accurate measurement of engine parameters and emission concentrations. The results show significant agreement between experimental and modeling data, with the new model demonstrating error reduction compared to conventional models.
Article
Chemistry, Physical
Hadi Taghavifar, Arash Nemati, F. J. Salvador, J. De la Morena
Summary: The research proposes a reactivity controlled compression ignition (RCCI) turbocharger-assisted engine that operates with diesel hydrogen fuels. The study evaluates the effects of various parameters on engine performance and analyzes the impact of design variables on exergetic performance.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Thermodynamics
Hadi Taghavifar
Summary: The study analyzed and compared the potential of E-transportation technology in phasing out internal combustion engines. Results showed significant improvements in mileage, fuel consumption, and emissions reduction in hybrid mode compared to traditional ICE alone mode.
Article
Green & Sustainable Science & Technology
Hadi Taghavifar, Zahra Sadat Zomorodian
Summary: This research identifies a highly potential campus site for solar/wind energy production, aiming to install a micro-hybrid system in on-grid mode to sellback excess electricity for income. Techno-economic surveys were conducted on different PV/wind/grid system configurations, showing differences in cost, renewable fraction, and cost of energy. Factors like inflation rate and wind speed impact the system's cost-effectiveness, with different equipment setups leading to varying outcomes. Increasing the number of wind turbines and higher wind speeds can reduce costs and energy expenses in the system.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Green & Sustainable Science & Technology
Hadi Taghavifar
Summary: In this study, the potential of gaseous fuels such as hydrogen, methane, and hythane in combination with diesel fuel is assessed. The results show that the entropy generation in hythane and hydrogen is higher compared to diesel, while water injection can reduce entropy. The study also compares the engine performance and emissions characteristics of different fuel blends.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Energy & Fuels
Ali Jabbarzadeh Ghandilou, Hadi Taghavifar
Summary: Numerical studies show that low temperature biodiesel spray injection induces more air entrainment to the spray boundary compared to diesel and high temperature biodiesel spray. The normalized parcel density for biodiesel is 12% larger than diesel and peaks at a shorter distance from the injection point.
Article
Engineering, Mechanical
Hadi Taghavifar, Simin Anvari
INTERNATIONAL JOURNAL OF HEAVY VEHICLE SYSTEMS
(2020)
Article
Multidisciplinary Sciences
Hadi Taghavifar, Simin Anvari
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2020)
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.