Article
Energy & Fuels
Ali Khanjani, Mohammad Amin Sobati
Summary: In this study, waste fish oil was utilized to produce biodiesel and emulsion fuels, which were then tested in a diesel engine to evaluate performance and emissions. Through multi-objective optimization, the best emulsion fuel formulation was identified, resulting in simultaneous reduction of CO, unburnt hydrocarbon, and nitrogen oxide emissions compared to neat diesel fuel.
Article
Thermodynamics
Jong Boon Ooi, Chia Chuin Kau, Dilrukshan Naveen Manoharan, Xin Wang, Manh-Vu Tran, Yew Mun Hung
Summary: Adding multi-walled carbon nanotubes improves the thermal conductivity of 20 vol% palm oil biodiesel in fossil diesel (B20). Experimental results from a single-cylinder diesel engine show that the addition of MWCNTs reduces ignition delay, improves combustion efficiency and performance, and reduces CO and UHC emissions while increasing NOx emissions.
Article
Environmental Studies
Muhamad S. N. Awang, Nurin W. M. Zulkifli, Muhammad M. Abbas, Syahir A. Zulkifli, Mohd N. A. M. Yusoff, Muhammad H. Ahmad, Muhammad A. H. Lokman NolHakim, Wan M. A. Wan Daud
Summary: The study shows that quaternary fuels can effectively improve the performance of diesel engines and reduce emissions, demonstrating great potential for utilization.
ENERGY & ENVIRONMENT
(2022)
Article
Energy & Fuels
B. Karpanai Selvan, Soni Das, M. Chandrasekar, R. Girija, S. John Vennison, N. Jaya, P. Saravanan, M. Rajasimman, Yasser Vasseghian, N. Rajamohan
Summary: The study investigates the performance and emission characteristics of various biomass blends in a diesel engine. The results show that the AO10D blend performs well with higher thermal efficiency and lower emissions at 50% load.
Article
Green & Sustainable Science & Technology
Jun Cong Ge, Jung Young Kim, Byeong O. Yoo, Jun Hee Song
Summary: This study aims to investigate and compare the effects of different diesel-bioethanol-biodiesel ternary mixture fuels on combustion and emissions from a four-cylinder diesel engine. The results show that the addition of ethanol can improve combustion, effectively control NOx and smoke emissions. Therefore, ethanol will play an important role in the future research field of energy saving and emission reduction for diesel engines.
Article
Thermodynamics
Jose Antonio Velez Godino, Miguel Torres Garcia, Francisco Jose Jimenez-Espadafor Aguilar
Summary: Experimental study on a compression ignition engine using late direct injection of rapeseed biodiesel fuel blends shows a significant reduction in nitrogen oxides emissions without compromising performance, indicating an advanced combustion mode between traditional compression ignition engines and homogeneous charge compression ignition combustion mode.
Article
Engineering, Mechanical
Jai Gopal Gupta, Avinash Kumar Agarwal
Summary: The study conducted long-term endurance tests on a CRDI engine using mineral diesel and a 20% Karanja biodiesel blend (KB20). Results showed that the lubricating oil used in the KB20-fuelled engine exhibited higher density, ash content, oxidation, and polymerization compared to the mineral diesel-fuelled engine. The study concluded that biodiesel blends could be used in CRDI engines without significant engine durability or lubricating oil degradation issues.
Article
Energy & Fuels
Qixin Ma, Quanchang Zhang, Zunqing Zheng
Summary: The study found that the increase in EGR rates and ethanol content in DB blends can affect combustion characteristics and emissions. Ultimately, using diesel/biodiesel/ethanol ternary fuels under medium EGR rates may be a better choice for diesel engines.
Article
Energy & Fuels
Jichao Liang, Quanchang Zhang, Zheng Chen, Zunqing Zheng
Summary: The experiment investigated the effects of biodiesel and n-pentanol on a common-rail diesel engine's performance and emissions at different EGR rates. Results showed that B20P10 fuel exhibited better combustion and emission characteristics, especially at higher EGR rates, compared to other tested fuels. The addition of n-pentanol to diesel may lead to higher maximum pressure rise rate, but ternary blends can alleviate the issue without decreasing ITE significantly.
Article
Energy & Fuels
Y. H. Teoh, H. Yaqoob, H. G. How, T. D. Le, H. T. Nguyen
Summary: This study compares the combustion, performance, and emission characteristics of tire pyrolysis oil, biodiesel, and diesel blended fuel in a multi-cylinder high-pressure common-rail diesel engine. The results show that the P10 fuel outperforms B10 and diesel fuel in terms of torque, brake power, brake thermal efficiency, and emissions reduction. Therefore, P10 is a suitable alternative fuel for multi-cylinder diesel engines without any modifications.
Article
Energy & Fuels
Haseeb Yaqoob, Yew Heng Teoh, Muhammad Ahmad Jamil, Farooq Sher
Summary: Waste to fuel conversion is important due to fuel demand, waste disposal issues, and environmental and economic impact. This study examines the energy, exergy, thermoeconomic, and sustainability aspects of tire pyrolysis oil (TPO)-diesel blends. The results show that DP10 (Diesel 90%-TPO 10%) performs the best in terms of energy and exergy efficiency, as well as sustainability.
Article
Thermodynamics
Md. Nurun Nabi, Wisam K. Hussam, Hasan Mohammad Mostofa Afroz, Adib Bin Rashid, Jahidul Islam, A. N. M. Mominul Islam Mukut
Summary: This study investigated the engine performance and emissions of waste tire oil-diesel-biodiesel blends, finding that the maximum blending limit for waste tire pyrolysis oil was 30% in diesel fuel.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Environmental
Melvin Victor De Poures, Damodharan Dillikannan, Gopal Kaliyaperumal, Sathish Thanikodi, Uemit Agbulut, Anh Tuan Hoang, Z. Mahmoud, Saboor Shaik, C. Ahamed Saleel, Asif Afzal
Summary: This study aimed to optimize the performance of a direct injection diesel engine by utilizing a ternary blend of diesel, biodiesel, and 1-hexanol. The fuel injection timing and exhaust gas recirculation (EGR) were optimized using response surface methodology (RSM). The HX20 blend (diesel 50 v/v% + biodiesel 30 v/v% + 1-hexanol 20 v/v%) injected at lesser fuel injection timing and EGR rate showed the best emission and performance characteristics.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Thermodynamics
Hanbey Hazar, Tugay Telceken, Huseyin Sevinc
Summary: In this study, safflower methyl ester (SME) was obtained from safflower seed oil for a CI engine through transesterification, which showed promising results in terms of emissions reduction compared to diesel fuel. However, improvements are still needed in terms of fuel efficiency and NOx emissions.
Article
Energy & Fuels
K. Shojae, M. Mahdavian, E. Baghshani
Summary: This study numerically investigated the emission and combustion characteristics of a heavy-duty diesel engine with different piston bowls, injection timings, and an exhaust gas recirculation system. The results showed that the use of P2 piston bowl improved thermal efficiency and internal power while reducing soot emission. The exhaust gas recirculation system and injection timing also had an impact on the emission and combustion characteristics.
Article
Engineering, Environmental
Jingwei Chen, Yu Bai, Tian Meng, Qiteng Wang, Chenxi Wang, E. Jiaqiang
Summary: This study investigates the decomposition mechanisms of amoxicillin in supercritical water through molecular dynamics simulation. The results show that amoxicillin undergoes carbon ring opening, carbon chain breaking, and small molecular compound conversion in supercritical water. The OH radical plays a vital role in the decomposition process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Wei Zuo, Dexin Li, E. Jiaqiang, Yongfang Xia, Qingqing Li, Yifan Quan, Guangde Zhang
Summary: A hydrogen-fueled micro planar combustor with cavity is designed to achieve high energy output power and energy conversion efficiency for micro-thermophotovoltaic system. Numerical investigations show that the micro planar combustor with cavity can achieve higher and more uniform outer wall temperature. With the reduction of cavity length and outlet size, the energy output and energy conversion efficiency of MTPV increase, but the pressure loss also becomes larger. The optimal dimensionless cavity length and outlet size are found to be 3/9 and 5/7 x 1/3, respectively. Nickel is identified as the optimal solid wall material for higher energy conversion efficiency, reaching 3.86% at an inlet velocity of 5 m/s. Therefore, the micro planar combustor with cavity is more suitable for MTPV system with higher energy output and energy conversion efficiency.
Article
Thermodynamics
Zhijie Chen, Wei Zuo, Kun Zhou, Qingqing Li, Yuhan Huang, E. Jiaqiang
Summary: This study optimized the performance of a proton exchange membrane fuel cell by using response surface methodology and non-dominated ranking genetic algorithm. The Pareto optimal solution obtained through this method improves the power density, system efficiency, and exergy efficiency of the fuel cell. This work provides a new multi-objective optimization method for designing more efficient fuel cells.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Energy & Fuels
Zhiwei Shi, Qingguo Peng, Jiaqiang E, Bo Xie, Jia Wei, Ruixue Yin, Guang Fu
Summary: This article systematically reviews the modification methods of catalysts in selective catalytic reduction (SCR) technology, analyzes the effects of various catalyst parameters on denitrification efficiency, and discusses the influences of spatial structure on catalytic effect. Additionally, it compares the performance of catalysts with different components and summarizes the current problems in catalyst research. The development of NH3-SCR technology is also prospected.
Article
Thermodynamics
Zhiqing Zhang, Rui Dong, Dongli Tan, Lin Duan, Feng Jiang, Xiaoxue Yao, Dixin Yang, Jingyi Hu, Jian Zhang, Weihuang Zhong, Ziheng Zhao
Summary: In this study, a three-dimensional computational fluid dynamics (CFD) model of diesel particulate filter (DPF) was used to investigate the influence of key structural factors on capture performance. The results show that reducing wall thickness and increasing filter diameter, filter length, and cell density per square inch (CPSI) can lead to a reduction in pressure drop and an improvement in filtration efficiency of DPF. Furthermore, the results of grey correlation analysis suggest that wall thickness is the most significant structural factor in DPF design. This work provides important reference for optimizing DPF capture performance and extending its working time.
Article
Thermodynamics
Wei Zuo, Zhijie Chen, E. Jiaqiang, Qingqing Li, Guangde Zhang, Yuhan Huang
Summary: A hydrogen-fueled micro planar combustor with tube outlet is designed to improve the energy output power and energy conversion efficiency for micro-thermophotovoltaic system. The effects of tube outlet structure parameters on the performance of micro planar combustor are numerically investigated. The results show that increasing the tube distance slightly improves the energy output and conversion efficiency, and reduces the pressure loss. Additionally, using square tubes instead of circular tubes is more suitable for the MTPV system, and increasing the number of tubes significantly enhances the energy output and conversion efficiency while reducing pressure loss.
Article
Thermodynamics
Dexin Li, Wei Zuo, Qingqing Li, Guangde Zhang, Kun Zhou, Jiaqiang E
Summary: In this study, the effects of pulsating flow and steady flow on the heat transfer and energy consumption of a multi-channel cold plate were compared and analyzed. Results show that pulsating flow has both positive and negative effects on heat transfer, pressure loss, and efficiency index during the total discharge process. The positive and negative effects are stronger with increasing pulsation amplitude at a fixed frequency. The energy consumption of pumping coolant under pulsating flow first decreases to a minimum value and then increases with further increase in pulsation amplitude.
Article
Thermodynamics
Dongli Tan, Dongmei Li, Su Wang, Zhiqing Zhang, Jie Tian, Jiangtao Li, Junshuai Lv, Wenling Zheng, Yanshuai Ye
Summary: This study aims to optimize the combustion and emission parameters of biodiesel-hydrogen engines through a 3D simulation model, experimental investigation, and response surface method. The results show that hydrogen addition enhances combustion and emission properties. The optimal working conditions include a hydrogen energy percentage of 6.9%, a load of 100%, and an EGR of 7.7%.
Article
Thermodynamics
Sheng Gao, Yanhui Zhang, Zhiqing Zhang, Dongli Tan, Junming Li, Zibin Yin, Jingyi Hu, Ziheng Zhao
Summary: This study investigated the performance and emission characteristics of diesel engines operating in highland areas. Through the use of response surface methodology and artificial neural networks, the emissions were predicted for different combustion chamber geometries. The predictions were then optimized using a non-dominated sorting genetic algorithm to obtain the optimal solutions.
Article
Thermodynamics
Zhijie Chen, Wei Zuo, Kun Zhou, Qingqing Li, Yuhan Huang, E. Jiaqiang
Summary: In this study, Taguchi experimental design, grey relational analysis, and analysis of variance were combined to investigate the impact of various factors on the performance of high-temperature proton exchange membranes fuel cell (HT-PEMFC). The results showed that the membrane thickness had the most significant contribution to the power density, while the anode stoichiometry ratio had the most significant contribution to the system efficiency and exergy efficiency of HT-PEMFC. This study provides important reference and valuable guidance for designing HT-PEMFC.
Article
Thermodynamics
Zhiqing Zhang, Jingyi Hu, Dongli Tan, Junming Li, Feng Jiang, Xiaoxue Yao, Dixin Yang, Yanshuai Ye, Ziheng Zhao, Guanhua Yang
Summary: This study investigated the effect of a Pd/CeO2 three-way catalytic converter on the combustion and emission characteristics of a gasoline engine. The optimal values of fuel consumption and NOx emission were 380 g/(kW·h) and 350 ppm, respectively, achieved under the torque of 45 N·m, gasoline-ethanol blending ratio of 17%, and rotational speed of 2027r/min.
Article
Thermodynamics
Hongshuo Zhao, Wei Zuo, Qingqing Li, Qianju Cheng, Ni Pan, Kun Zhou
Summary: The design of a reasonable and efficient motor cooling system is crucial for a high temperature surface type permanent magnet synchronous motor (STPMSM). This work compares and analyzes the heat transfer coefficients and pressure losses of the ordinary spiral round channel (OSRC) and the grooved spiral round channel (GSRC) under different conditions. The results show that the GSRC has reduced pressure loss and increased heat transfer coefficient compared to the OSRC. Furthermore, the thermal-hydraulic performance evaluation using the performance evaluation criterion (PEC) demonstrates that the GSRC is significantly superior to the OSRC.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Multidisciplinary Sciences
Yanhui Chen, Jian Zhang, Zhiqing Zhang, Weihuang Zhong, Ziheng Zhao, Jingyi Hu
Summary: This study investigated the impact of different proportions of biodiesel blends on the performance and emission characteristics of a diesel engine. A three-dimensional simulation model was created using CONVERGE software to simulate the combustion process. The results showed that biodiesel blends could improve the brake thermal efficiency and reduce soot emissions, but they also led to increased fuel consumption and NOx emissions.
Article
Thermodynamics
Dongli Tan, Rui Dong, Zhiqing Zhang, Bin Zhang, Feng Jiang, Yanshuai Ye, Dongmei Li, Hui Liu
Summary: This study develops a hybrid multi-objective optimization approach to optimize the comprehensive trap performance of diesel particulate filter (DPF). Critical structures are selected through fuzzy grey correlation analysis, and machine learning models are trained to relate the structures to filtration efficiency and pressure drop. The optimized DPF shows significant improvement in both pressure drop and filtration efficiency.
Article
Chemistry, Applied
Zhiqing Zhang, Ziheng Zhao, Dongli Tan, Yanshuai Ye, Bin Zhang, Bo Huang, Weihuang Zhong, Jian Zhang, Jingyi Hu
Summary: This review provides a detailed summary of the mechanism of water's effect on SCR reactions, discussing the impact of reaction conditions and catalyst types on SCR reactions and catalysts, and collating improvement strategies to enhance the activity and water resistance of SCR catalysts.
FUEL PROCESSING TECHNOLOGY
(2023)
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.
