Article
Thermodynamics
Tiancheng Ouyang, Jie Lu, Peihang Xu, Xiaoyi Hu, Jingxian Chen
Summary: Fuel cells are efficient, environmentally friendly, and renewable energy devices that are well-suited for portable electronic devices. This study found that vapor-feed microfluidic fuel cells have higher tolerance to low flow rates and achieve higher energy efficiency compared to liquid-feed microfluidic fuel cells. Additionally, increasing the electrolyte and fuel concentrations significantly improves the performance of these microfluidic fuel cells.
Article
Thermodynamics
Tiancheng Ouyang, Jie Lu, Zhongkai Zhao, Jingxian Chen, Peihang Xu
Summary: Fuel cell technology offers long-term energy storage and instant power generation. Microfluidic fuel cells have a broad application prospect due to small size and high power density, with vibration having a positive but limited effect on vapor-feed microfluidic fuel cells.
Article
Thermodynamics
Jingxian Chen, Peihang Xu, Jie Lu, Tiancheng Ouyang, Chunlan Mo
Summary: Microfluidic fuel cell is a promising device for portable electronic devices due to its output power, work time, and low emission, but vibration effects play a crucial role in its performance. A two-phase computational model was proposed to analyze the negative effects of vibration on the fuel cell performance, providing insights for future anti-vibration elements and cell design optimization.
Article
Energy & Fuels
Shaimaa Seyam, Ibrahim Dincer, Martin Agelin-Chaab
Summary: This study introduces a hybrid combined engine system using ecofriendly fuels, which enhances engine performance, reduces carbon emissions, and achieves high power and efficiency.
Article
Chemistry, Applied
H. Ishaq, O. Siddiqui, I. Dincer
Summary: This study developed a cascaded ammonia synthesis system by serially connecting two ammonia synthesis reactors with pre-reduced KMR catalyst, leading to improved synthesis rates. Experimental results showed that under the right operating temperature and pressure, employing a cascaded ammonia synthesis system can increase ammonia conversion efficiencies.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Tiancheng Ouyang, Jingxian Chen, Jie Lu, Peihang Xu, Chunlan Mo
Summary: Fuel cells play a significant role in clean and efficient power supply, with potential applications in portable electronic devices. Vibration has a negative impact on cell performance, which can be mitigated by increasing the feed liquid flow rate.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Energy & Fuels
Andre Bolt, Ibrahim Dincer, Martin Agelin-Chaab
Summary: This study proposes a design for a new renewable integrated multigeneration system that can produce natural gas and methane. The system utilizes solar energy and wind energy to generate electricity and store thermal energy. The system has various useful outputs including electrical power, heat for space heating, cooling and domestic hot water. The performance of the system under different operating conditions has been extensively investigated.
Article
Energy & Fuels
Mohammad Salimi Delshad, Ali Momenimovahed, Mohammad Sh Mazidi, Mehdi A. Ehyaei, Marc A. Rosen
Summary: The study conducted energy, exergy, exergoenvironmental, and exergoeconomic analyses on a natural gas boosting station, revealing the balance between system efficiency and cost under different operating conditions. The results showed significant impact of ambient temperature on system performance and cost rates, with environmental impact playing a key role in total cost rates.
ENERGY SCIENCE & ENGINEERING
(2021)
Article
Thermodynamics
Emin Acikkalp, Hakan Caliskan, Onder Altuntas, Arif Hepbasli
Summary: A novel combined extended-advanced exergy analysis method has been developed and applied to a gas turbine system for a case study, showing its variability. The method integrates various thermodynamic analysis methodologies to assess all input parameters including labor, capital, and environment with better efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Tiancheng Ouyang, Jingxian Chen, Wenjun Liu, Peihang Xu, Jie Lu, Zhongkai Zhao
Summary: Microfluidic fuel cell is considered as a future clean power source, but it faces challenges in practical application, such as the impact of vibration and two-phase flow on cell characteristics. This study establishes a biphasic model that integrates vibration effect and bubble dynamics theory, revealing that vibration distorts CO2 and delays bubble separation, while increasing flow rate improves current and power outputs at the expense of system efficiency.
Article
Energy & Fuels
Shaimaa Seyam, Ibrahim Dincer, Martin Agelin-Chaab
Summary: This paper presents a new hybrid locomotive engine that uses sustainable hydrogen-based fuel blends and includes an energy recovery system, resulting in high efficiency and low carbon emissions.
Article
Engineering, Aerospace
Hakan Caliskan, Selcuk Ekici, Yasin Sohret
Summary: In this study, exergy dynamic and advanced exergy analyses were applied to assess the exergies and performances of different components in a turbojet engine. The results showed that the combustion chamber had the highest exergy, while the air compressor had the lowest exergy. The turbine component had the highest exergy efficiency, while the combustion chamber component had the lowest exergy efficiency.
PROPULSION AND POWER RESEARCH
(2022)
Article
Thermodynamics
Kalimuthu Selvam, Yosuke Komatsu, Anna Sciazko, Shozo Kaneko, Naoki Shikazono
Summary: The study found that solid oxide fuel cells fueled with hydrogen carriers have lower efficiency and measures need to be taken to improve it, especially by using the 100% system fuel utilization configuration achieved by a dead-end anode (DEA) loop. The ammonia-fueled recirculation system has higher energy efficiency and exergy efficiency compared to the conventional system.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Lukas Kerpen, Achim Schmidt, Bernd Sankol
Summary: This study evaluates a combustion process using the Physical Optimal (PhO) method and investigates the differences between PhO and exergy, showing that PhO may be used for combustion evaluation. However, it also demonstrates that PhO is a simplification of fuel exergy and does not provide advantages over exergy evaluation. No adaptation of PhO is made due to minimal deviation in simulated energy indicators, and proposed adjustments could exceed limits of the PhO-Factor. The introduction of the indirect PhO-Factor is proposed for targeted process optimization, which closely corresponds to exergy efficiency.
Article
Thermodynamics
Aidan Rigby, Ben Lindley, Jonathan Cullen
Summary: As energy systems worldwide change to mitigate against climate change, the sustainability of electricity production methods is becoming increasingly relevant. Nuclear energy needs efficient conversion of uranium to electricity to be considered sustainable. This study proposes a more comprehensive definition of nuclear exergy that accounts for the additional exergy released in nuclear decay. The newly defined nuclear exergy is used to evaluate the sustainability of advanced nuclear fuel cycles.
Article
Chemistry, Multidisciplinary
Xiaoran Zhang, Xiaomin Xu, Sixian Yao, Chao Hao, Can Pan, Xue Xiang, Zhi Qun Tian, Pei Kang Shen, Zongping Shao, San Ping Jiang
Summary: In this study, single cobalt atom catalysts embedded in nitrogen-doped carbon materials were successfully synthesized by precursor modulation. The researchers found that the catalyst with graphitic nitrogen coordination exhibited superior activity and stability in oxygen reduction and evolution reactions, due to the electron donation effect of graphitic nitrogen on the Co-N-4 active sites.
Article
Engineering, Mechanical
Yudong Shen, Wenwu Lei, Wentao Tang, Tiancheng Ouyang, Lizhe Liang, Zhi Qun Tian, Pei Kang Shen
Summary: Research on nano additives for friction and wear reduction at steel/steel contact interfaces indicates that SiO2/3D GNS nanoblend demonstrates the best tribological performance under low speed and heavy load conditions. This is due to the synergistic effect between nanoparticles and the formation of a protective film, which reduces friction and wear at the friction interface.
Article
Engineering, Environmental
Xiaoran Zhang, Xingyu Wen, Can Pan, Xue Xiang, Chao Hao, Qinghao Meng, Zhi Qun Tian, Pei Kang Shen, San Ping Jiang
Summary: Precise regulation of N, S doping and their synergetic effect is crucial for N, S co-doped carbon materials as efficient electrocatalysts. Graphene nanosheets prepared from specific precursors exhibit excellent performance in ORR and OER.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Thermodynamics
Changzheng Li, Zheng Liu, Hongrui Zhang, Nan Qiao, Zhe Zhang, Jianyang Zhou, Zhi Qun Tian
Summary: This study proposes an ion transport model driven by pressure and temperature gradient to investigate the energy conversion characteristic in nanochannels. The results show that different electrical boundary conditions lead to significant deviations in power generation performance. The output power is improved with increasing temperature and pressure gradient due to enhanced current. Additionally, the Soret effect is found to play an important role in ion transport.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Can Pan, Qi Wei, Xiaoran Zhang, Yilin Huang, Danlian Liu, Wentao Tang, Tiancheng Ouyang, Iizhe Liang, Zhi Qun Tian, Pei Kang Shen
Summary: A method for synthesizing graphene powders via self-polymerized compounds was developed, and the key properties of the graphene powders were effectively modulated. These graphene powders exhibit high specific surface area, high conductivity, and thin thickness, making them suitable for applications in lubrication enhancement and electromagnetic shielding.
Article
Engineering, Environmental
Xue Xiang, Xiaoran Zhang, Bowen Yan, Kun Wang, Yunqiu Wang, Dandan Lyu, Shibo Xi, Zhi Qun Tian, Pei Kang Shen
Summary: A general method of synthesizing transition metal coordinated by nitrogen doped carbon (M-N-C) using a synchronous complexation-polymerization strategy was developed, showing excellent ORR activity and durability of Fe-N-C for metal-air batteries and fuel cells.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Electrochemistry
Changzheng Li, Zheng Liu, Nan Qiao, Zhenfei Feng, Zhi Qun Tian
Summary: This study considers the effect of channel height on surface charge in nanochannels and investigates the associated ions transport, fluidic flow, and heat transfer. The results show that the deviation considering the height effect or not is significant, especially in the situation of boundary slip. This research provides useful guidelines for understanding the electroviscous effect in nanochannels and optimizing the design and performance of nanofluidic devices.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Xingxian Lan, Taijin Tang, Huarui Xie, Syed Waqar Hasan, Lizhe Liang, Zhi Qun Tian, Pei Kang Shen
Summary: Flexible power sources are crucial for the widespread use of portable and wearable electronics. This study presents a facile and general method for fabricating fibrous electrodes, which bridges the gap between materials and fiber-shaped electrodes for flexible energy storage devices.
Article
Chemistry, Physical
Zhenyu Chen, Chao Hao, Bowen Yan, Qiuyan Chen, Huiyan Feng, Xiaoqing Mao, Jianmei Cen, Zhi Qun Tian, Panagiotis Tsiakaras, Pei Kang Shen
Summary: A self-confined method for synthesizing highly dispersed PtCo-alloy on Co, N co-doped mesoporous carbon (PCN-MC) was developed via a dual-template strategy. By adjusting the feeding-ratio, the alloying degree and nanoparticle size were optimized to achieve outstanding oxygen reduction reaction activity and durability.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Applied
Qing Hao Meng, Chao Hao, Bowen Yan, Bin Yang, Jia Liu, Pei Kang Shen, Zhi Qun Tian
Summary: Fabrication of PEMFCs with order-structured cathodic electrodes was achieved by depositing Pt nanoparticles onto vertically aligned carbon nanotubes (VACNTs) grown on Al foil, resulting in improved power output and durability. The proportion of hydrophilic Pt-deposited region and the residual hydrophobic region of VACNTs without Pt strongly influenced the cell performance, especially at high current densities. The optimized structure showed the highest performance at a Pt loading of 50 gg cm-2 and a VACNTs length of 4.6 gm.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Electrochemistry
Lice Yu, Xinru Pang, Zhiqun Tian, Shuli Wang, Ligang Feng
Summary: The catalytic performance of NiSe2 nanorod for urea oxidation can be greatly improved by Fe doping, which enhances the interface electric field and the adsorption capacity to urea molecules. The optimal Fe doping amount is 1.68 at.%, achieving the highest catalytic performance with a current density of 125.8 mA cm-2.
ELECTROCHIMICA ACTA
(2023)
Article
Thermodynamics
Changzheng Li, Zheng Liu, Yaofeng Wang, Asad Ali, Zhi Qun Tian
Summary: This paper proposes an energy harvesting system based on charged conical nanopore and investigates the influence of salinity and temperature gradient on the maximum output power and energy conversion efficiency. The results show that the enhancement of negative temperature difference has a more significant effect on the maximum output power, and the system achieves a maximum optimal value of 0.22 pW.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Mechanical
Wenwu Lei, Wentao Tang, Xiaoyu Mo, Zhiqun Tian, Peikang Shen, Tiancheng Ouyang
Summary: In this study, nitrogen-doped element-modified graphene with strong adsorption and superior lubricating properties was prepared using a bottom-up chemical strategy to overcome the limited adsorption capacity of ordinary graphene at high temperature. The reciprocating tribometer was used to simulate the piston operating environment and evaluate the lubrication performance of nitrogen-doped graphene. Characterization and analysis of wear marks were conducted using depth-of-field microscope, scanning electron microscope, energy dispersive spectrometer, and other instruments. The experimental results showed that the friction-reduction and anti-wear properties of PAO 6 base oil were improved by 22.4% and 56.9% (100 ?), respectively, after adding 0.4 wt% nitrogen-doped graphene. Additionally, abrasive and adhesive wear were significantly reduced due to inter-layer slip and superior adsorption performance. The interfacial lubrication mechanism of lubricant protective film under high-temperature conditions was also revealed.
JOURNAL OF TRIBOLOGY-TRANSACTIONS OF THE ASME
(2023)
Article
Nanoscience & Nanotechnology
Changzheng Li, Minjin Huang, Zhe Zhang, Yaoyu Qin, Lizhe Liang, Zhi Qun Tian, Asad Ali, Pei Kang Shen
Summary: The thermal properties of hybrid thermal interface materials (TIMs) were improved by adding three-dimensional (3D) graphene as fillers, which resulted in enhanced thermal diffusivity and thermal conductivity. The optimal thermal characteristics were observed at 1.5 wt% of 3D graphene content, with a maximum enhancement of 683%. Heat dissipation experiments demonstrated the potential of the 3D graphene/epoxy hybrids, and applying them to high-power LED effectively reduced the maximum temperature.
Article
Materials Science, Multidisciplinary
Changzheng Li, Hongrui Zhang, Yaofeng Wang, Xuyang Liu, Asad Ali, Zhi Qun Tian
Summary: A bubble driven triboelectric nanogenerator (BD-TENG) is explored to efficiently scavenge energy directly from rising air bubbles in a PTFE tube filled with deionized water. The BD-TENG can generate sustained voltages of up to -120 V and has been demonstrated to illuminate blue LEDs. The innovative research work provides a roadmap for bubble energy harvesting in liquid media.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
