Article
Thermodynamics
Linhong Li, Guangyao Yang, Aiwu Fan
Summary: The study verified that a symmetrical configuration of micro-combustor can improve combustion efficiency and radiation efficiency, allowing it to operate at higher average velocities. Furthermore, as the average velocity increases, combustion efficiency decreases monotonically while radiation efficiency and radiant energy output increase first and then decrease.
Article
Thermodynamics
Mutabe Aljaghtham, Emrah Celik
Summary: This paper presents a comprehensive analysis of novel unileg cascade thermoelectric systems, and simulation results show that unileg cascade systems perform significantly better than their unicouple counterparts in both two and three stage configurations, offering enhanced thermoelectric power generation and reduced thermal stress.
Article
Energy & Fuels
Zakaria Mansouri
Summary: A novel micro-combustor with a wavy wall shape is proposed for micro-thermophotovoltaic devices, aiming to improve energy conversion efficiency. Numerical simulations show that the wavy shape increases the combustor efficiency by 8.3% compared to a flat shape. Optimum parameters for better conversion performance are reported.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Thermodynamics
Zhengyang Zhao, Zhengxing Zuo, Wei Wang, Nianling Kuang, Peiyun Xu
Summary: This study proposes an opposed flow porous micro combustor structure that provides stable combustion under high inlet power. The results show that the combustor meets the temperature requirements of thermoelectric module and has a high thermal efficiency and power density. By improving the structure and customizing the thermoelectric module, the system achieves both high conversion efficiency and power density.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Miftah Y. Fauzan, S. M. Muyeen, Syed Islam
Summary: This paper presents a technique to enhance the performance of a thermoelectric generator under non-uniform heat distribution, validated through experimentation. A method for maximizing power to overcome the effects of non-uniform heat distribution is proposed.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Xiongbao Hu, Zuguo Shen, Yu Wang
Summary: It is impossible to control the outer wall temperature of the micro-combustor below the maximum allowable temperature of commercial thermoelectric generators simply through increasing the equivalent heat transfer coefficient. Three simple strategies were developed to improve temperature uniformity, yet none of them could ensure full temperature control.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2024)
Article
Thermodynamics
Guoneng Li, Zhihao Zhu, Youqu Zheng, Wenwen Guo, Yuanjun Tang
Summary: This study develops a powerful hybrid micro thermoelectric generator powered by an ultrahigh capacity miniature combustor. It can provide an electric power of over 50 W with a systematic efficiency of 2.92%. By combining different types of thermoelectric modules, the performance of the thermoelectric generator is significantly improved. Detailed characteristics such as temperature distribution, combustion efficiency, pollutant emissions, and various efficiencies are explored, and discussions on different metrics of the hybrid thermoelectric generator are conducted.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Electrical & Electronic
Alireza Hassanzadeh, Sajjad Baghestani
Summary: This article introduces a new self-powered temperature sensor based on thermoelectric generators (TEGs). The sensor utilizes two types of TEGs to measure temperature and supply the interface circuit, and employs a three-terminal TEG to account for the temperature difference between the cold and hot surfaces. By using a machine-learning algorithm and Seebeck curve fitting, the sensor achieves an error of less than +/- 1 degrees C for cold surface temperatures ranging from 0 degrees C to 70 degrees C.
IEEE SENSORS JOURNAL
(2022)
Article
Thermodynamics
Won Hyun Kim, Tae Seon Park
Summary: In this study, the combination of H2-air micro combustor (MC) with micro-thermophotovoltaic and micro-thermoelectric systems was analyzed. The effect of multihole baffle plate on combustion efficiency and mean temperature was explored, and the results showed improvements in both parameters.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Physical
Ziqiang He, Yunfei Yan, Shuai Feng, Xiuquan Li, Ruiming Fang, Zhiliang Ou, Zhongqing Yang
Summary: This study compared the heat transfer performance and energy output of different channel shapes MCMC and CMC in the MTPV system, finding that the MCMC with diamond channels had a higher outer wall temperature at a certain flow rate. Additionally, the double-layer MCMC with counterflow structure achieved the highest total energy conversion efficiency under specific conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Review
Engineering, Electrical & Electronic
Qihao Zhang, Kangfa Deng, Lennart Wilkens, Heiko Reith, Kornelius Nielsch
Summary: This review examines the development of micro-thermoelectric devices, exploring progress in device design, integration, and performance, as well as the potential applications of the technology in cooling, power generation, and sensing. These devices offer faster response time, higher resolution, and greater power density compared to their commercial counterparts, making them crucial for highly integrated electronic devices, the Internet of Things, and flexible and wearable technology.
NATURE ELECTRONICS
(2022)
Review
Physics, Multidisciplinary
Nassima Radouane
Summary: Our community is currently facing issues such as rising electricity costs, pollution, and global warming. Scientists are improving energy-harvesting power generators to minimize their impact, using the Seebeck effect to demonstrate the capabilities of thermoelectric generators (TEGs) in converting thermal energy into electrical energy. TEGs are environmentally friendly, operate quietly, can be fabricated using different technologies, and have a long operational lifetime. They can be integrated into various devices and have applications in fields such as automobile and biomedical.
Article
Chemistry, Physical
Ziqiang He, Yunfei Yan, Xiuquan Li, Kaiming Shen, Junnan Li, Zhien Zhang
Summary: The study focuses on the impact of hydrogen mass flow rate, equivalence ratio, and materials on the thermal performance of micro-thermophotovoltaic (MTPV) system, providing suggestions for improving energy output.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Electrical & Electronic
Yuriy Lobunets
Summary: The article discusses the importance of utilizing low-potential energy sources and the potential of thermoelectric power generation technology, highlighting the key to optimizing thermoelectric generator efficiency lies in the research of material and device parameter optimization. The researchers also emphasized the importance of mathematical modeling and the possibility of tuning thermoelectric material properties for specific tasks in external conditions.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Thermodynamics
Song Lv, Jiahao Yang, Juwen Ren, Bolong Zhang, Yin Lai, Zhihao Chang
Summary: This research constructs a three-dimensional thermal simulation transient model for evaluating the performance of the PV-TEG-PCM system under fluctuating solar irradiation. The effects of PCM melting temperature, thickness, and thermal conductivity are studied, and the results show that the performance of the PV-TEG-PCM system is superior to other systems.
Article
Thermodynamics
Jun Li, Pengbin Fu, Qiren Zhu, Yandong Mao, Cheng Yang
APPLIED THERMAL ENGINEERING
(2018)
Article
Thermodynamics
Qingqing Li, Jun Li, Junrui Shi, Zhaoli Guo
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2019)
Article
Thermodynamics
Yilin Zhu, Weiyi Li, Jun Li, Haojie Li, Yongzhen Wang, Shuai Li
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Engineering, Multidisciplinary
Jun Li, Pengbin Fu, Yandong Mao, Varinder Saini, Ellina Sokol
Article
Thermodynamics
Jun Li, Yinan Yang, Jinsong Li, Yandong Mao, Varinder Saini, Svetlana Kokh
Summary: Underground coal fires cause significant loss of energy resources and pollution. The limited oxygen supply in UCFs results in a unique mode of coal-oxygen reactions. Experimental results show that oxygen concentration does not significantly affect early reaction stages, but influences reaction intensity and duration at low oxygen levels. The variation in apparent activation energy reflects different reaction stages, such as volatiles burning and char oxidation, with limited oxygen supply controlling reaction rate throughout the process.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Jun Li, Hongcheng Xiao, Qingqing Li, Junrui Shi
Summary: The study aims to analyze heat fluxes in porous micro-combustors and discuss the effects of wall thermal conductivity and porous media properties on flame temperature. Results show that smaller porous micro-combustors have a higher proportion of heat recirculation relative to heat losses, and flame temperature is inversely related to the ratio of total heat losses to total heat recirculation.
Article
Chemistry, Multidisciplinary
Qingqing Li, Jiansheng Wang, Jun Li, Junrui Shi
Summary: Inserting porous media into the micro-scale combustor space enhances heat recirculation, extending flammability limits and improving flame stability. A pore-scale model (PSM) is developed to consider the detailed structure of the porous media, showing better understanding of combustion characteristics and flame stability limits compared to the volume-averaged model (VAM). The PSM predicts scattered flame zones, larger flame stability range, and other improved parameters compared to VAM, indicating its suitability for simplification in certain configurations of porous micro-combustors.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Environmental
Yinan Yang, Jun Li
Summary: This study investigated the macro-kinetics of coal-oxygen reactions under varying oxygen concentrations, especially under extremely oxygen-depleted conditions. The results provide insights into the control and extinguishment of underground coal fires.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Environmental Sciences
Varinder Saini, Jun Li, Yinan Yang, Jinsong Li
Summary: Coal mining activities have significant environmental impacts, particularly on air quality. This study used the analytic hierarchy process to evaluate the environmental quality of the Rujigou coalfield. The results showed that mining activities had the greatest impact on air quality.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Qingqing Li, Jun Li, Junrui Shi
Summary: Micro-combustors filled with porous media provide dual pathways for heat recirculation, making them potentially suitable for micro-combustion applications. A 3D pore-scale model is developed to simulate the combustion process in a planar channel partially filled with porous media. The results highlight the importance of considering detailed pore structures in modeling porous micro-combustors.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2023)
Article
Environmental Sciences
Varinder Saini, Jun Li, Yinan Yang, Jinsong Li, Baoming Wang, Jun Tan
Summary: This study investigates the environmental impacts of coal mining in the Ruqigou coalfield in China. The results show that mining activities have led to deforestation, air and water pollution, soil degradation, and changes in land cover, especially vegetation. The use of field-based measurements and remote sensing data proves to be an effective tool in understanding the comprehensive environmental impacts of large-scale mining.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2022)
Article
Engineering, Civil
Jun Li, Junjie Pan, Jinsong Li
Summary: Smouldering is the dominant combustion mode in underground coal fires (UCFs). This study investigated the effects of air leakage and burning position on smouldering propagation in UCFs. The results showed that coarser particles failed to ignite, while finer particles successfully initiated self-sustained smouldering. Air leakage enhanced the smouldering temperature near the wall boundary, and the ignition position influenced the burning rate of the coal bed.
FIRE SAFETY JOURNAL
(2022)
Article
Engineering, Chemical
Long Meng, Jun Li, Qingqing Li, Junrui Shi
Article
Thermodynamics
Qingqing Li, Jiansheng Wang, Long Meng, Jun Li, Zhaoli Guo
APPLIED THERMAL ENGINEERING
(2017)
