Article
Thermodynamics
Ding Luo, Zeyu Sun, Ruochen Wang
Summary: A novel fluid-thermal-electric multiphysics numerical model is proposed in this paper to predict the performance of a thermoelectric generator system for automobile waste heat recovery. The study reveals that the position of thermoelectric modules on the hot side heat exchanger plays a crucial role in output uniformity, and output becomes more uniform as vehicle speed increases.
Article
Energy & Fuels
Yulong Zhao, Mingjie Lu, Yanzhe Li, Minghui Ge, Liyao Xie, Liansheng Liu
Summary: The article introduces a new design of thermoelectric generator, which improves overall thermoelectric performance by enhancing heat transfer in the exhaust channel. The research finds that the net output power of the new generator can be significantly increased, while the number of modules can be greatly reduced.
Article
Chemistry, Analytical
Jianfei Chen, Wei Xie, Min Dai, Guorong Shen, Guoneng Li, Yuanjun Tang
Summary: This study designed and tested a low-pressure drop thermoelectric generator for waste heat recovery, achieving an overall efficiency of 1.21%.
Article
Thermodynamics
Ding Luo, Zihao Wu, Yuying Yan, Dongxu Ji, Ziming Cheng, Ruochen Wang, Ying Li, Xuelin Yang
Summary: A fluid-thermal-electric multiphysics numerical model is established to study the performance of heat exchangers in automotive thermoelectric generator (ATEG) systems. The optimal parameters for heat exchangers with and without fins are obtained through optimization. The use of fins can significantly increase the net power and net efficiency of the ATEG system.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Ratnak Sok, Jin Kusaka
Summary: Integrated thermoelectric generators (TEGs) and heat exchangers (HEX) are important for converting heat into electrical power. This study develops a 1D TEG model using the model-based development (MBD) method and focuses on the heat transfer coefficient alpha, pressure drop AP, and component temperatures that affect the electrical power from thermoelectric modules (TEM). Two methods are used to develop the model, with Method 2 achieving good performance without model tuning. The fast-predictive TEG model can be used for TEG redesign and integrated into vehicle-level simulations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Ding Luo, Yuying Yan, Ying Li, Xuelin Yang, Hao Chen
Summary: The automobile thermoelectric generator is a promising technology for improving fuel economy. By optimizing the fin distance and thickness of the heat exchanger, significant improvements in performance are observed, with increases in power, efficiency, net power, and net efficiency compared to the generator without fin optimizations.
Article
Environmental Sciences
Ayman Eldesoukey, Hamdy Hassan
Summary: The performance of a thermoelectric generator cooled by a microchannel heat spreader using nanofluid for waste heat recovery from a vertical chimney is investigated in this paper. Results show that increasing the size of the heat spreader and microchannel improves the output power of the thermoelectric generator and achieves maximum cooling system efficiency and net output power.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Thermodynamics
Minghui Ge, Yuntong Zhao, Yanzhe Li, Wei He, Liyao Xie, Yulong Zhao
Summary: This study investigated the influence of the structural parameters of a thermoelectric generator on the system efficiency of a photovoltaic-thermoelectric hybrid system. An optimal structural parameter for the TEG was identified, along with an analysis of its relationship with CPV temperature coefficient, concentration ratio, and cooling heat transfer coefficient.
Article
Thermodynamics
Guoneng Li, Jie Ying, Youqu Zheng, Wenwen Guo, Yuanjun Tang, Chao Ye
Summary: An analytical design model for waste heat thermoelectric generator (TEG) is developed and validated through experiments, which interlinks the material, device, and system levels. The waste heat TEG prototype generates 96.6W electric power under the exhaust gas temperature of 648K, showing superior performance.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Alvaro Casi, Miguel Araiz, Leyre Catalan, David Astrain
Summary: Thermoelectricity has potential in waste heat recovery through thermoelectric generators, but challenges remain in implementing the technology in industries. Computational models and experimental studies are used to optimize the performance of the generators and heat pipes, resulting in an average of 4.6 W of electrical power during testing period.
APPLIED THERMAL ENGINEERING
(2021)
Article
Energy & Fuels
Mahmut Hekim, Engin Cetin
Summary: This study demonstrates the integration of TEGs into geothermal power plants to harvest waste thermal energy from reinjected geothermal brine, potentially increasing electricity generation. The optimal layout configuration of TEGs and the effect of temperature variations on ORC and TEG performance are analyzed, revealing potential power outputs for different temperature differences. Careful consideration is needed when implementing TEGs to ensure optimal energy production without compromising the overall performance of geothermal power plants.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Ding Luo, Ruochen Wang, Yuying Yan, Wei Yu, Weiqi Zhou
Summary: The study introduces a complete transient fluid-thermal-electric multiphysics coupling field numerical model to evaluate the dynamic performance of automotive thermoelectric generator systems. Results indicate that there is a delay in output response with changes in exhaust temperature, and the changes in output voltage and power are often accompanied by changes in exhaust mass flow rate.
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
Materials Science, Multidisciplinary
Keita Toh, Koichiro Suekuni, Katsuaki Hashikuni, Hirotaka Nishiate, Ushin Anazawa, Chul-Ho Lee, Michitaka Ohtaki
Summary: It has been shown that ball milling and sintering processes can effectively reduce the secondary phases in alpha-MgAgSb samples, contributing to improved sample purity and thermoelectric performance. Further reduction of secondary phases and enhancement of ZT values can be achieved by decreasing the starting Ag content.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Energy & Fuels
Yulong Zhao, Mingjie Lu, Like Yue, Liyao Xie, Minghui Ge
Summary: This study proposes the addition of porous plates in vehicle exhaust to improve the thermoelectric conversion efficiency of waste heat. A coupled heat-electric-flow model is constructed and simulation results show that the addition of porous plates has a significant impact on the overall temperature of the exhaust channel. An optimal insertion position exists for maximum power generation.
Article
Thermodynamics
Jie Chen, Ruochen Wang, Ding Luo, Weiqi Zhou
Summary: In this study, a segmented converging thermoelectric generator is proposed and optimized, leading to a significant improvement in output power by making the temperature differences of thermoelectric modules in all segments approximately identical.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
Weiqi Zhou, Jiasheng Yang, Qing Qin, Jiahao Zhu, Shiyu Xu, Ding Luo, Ruochen Wang
Summary: This study investigates the effect of module layout on the output power of an automotive exhaust thermoelectric power generation system through numerical simulation. The results show that the module spacing and module coverage ratio have an impact on the output power, and choosing larger module size can improve temperature uniformity and increase the power output.
Article
Thermodynamics
Ding Luo, Zeyu Sun, Ruochen Wang
Summary: A novel fluid-thermal-electric multiphysics numerical model is proposed in this paper to predict the performance of a thermoelectric generator system for automobile waste heat recovery. The study reveals that the position of thermoelectric modules on the hot side heat exchanger plays a crucial role in output uniformity, and output becomes more uniform as vehicle speed increases.
Article
Thermodynamics
Zeyu Sun, Ding Luo, Ruochen Wang, Ying Li, Yuying Yan, Ziming Cheng, Jie Chen
Summary: A comprehensive three-dimensional transient thermal-electric numerical model is established to evaluate the dynamic response and energy recovery potential of the solar thermoelectric generator (STEG). The research finds that the transient model can predict the performance of the STEG more accurately by considering factors such as thermal diffusion.
Article
Energy & Fuels
Ding Luo, Yuying Yan, Ying Li, Ruochen Wang, Shan Cheng, Xuelin Yang, Dongxu Ji
Summary: This study proposes a hybrid transient CFD-thermoelectric numerical model to predict the dynamic response characteristics of an automobile thermoelectric generator system. Through transient numerical study, it is found that the dynamic output power changes smoothly while the conversion efficiency fluctuates greatly. The findings contribute to a better understanding of the dynamic response characteristics of the automobile thermoelectric generator system.
Article
Thermodynamics
Ding Luo, Yuying Yan, Ying Li, Wei-Hsin Chen, Xuelin Yang, Xuehui Wang, Bingyang Cao
Summary: This study evaluates the dynamic performance of a simplified automobile thermoelectric generator under different driving cycles and provides guidance for the application of automobile thermoelectric waste heat recovery. The findings suggest that the dynamic output power of the generator exhibits smoother fluctuations compared to exhaust temperature and displays hysteresis in its response, while the dynamic conversion efficiency experiences sharp fluctuations. The behavior of the generator in dynamic situations is not entirely proportional to vehicle speed but depends on changes in exhaust heat. Comparing steady and dynamic results, it is found that the steady-state model overestimates output power but may underestimate conversion efficiency. The automobile thermoelectric generator is more suitable for vehicles with frequent speed changes to enhance dynamic output performance.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Wei-Hsin Chen, Manuel Carrera Uribe, Ding Luo, Liwen Jin, Lip Huat Saw, Ravita Lamba
Summary: In recent years, the use of unsustainable and inefficient energy sources has led to environmental pollution. Thermoelectric generators (TEGs) have the potential to recover wasted heat, but their energy conversion efficiency needs improvement. This study optimizes commercially available TEGs by considering hot side temperature, heat sink size, and wind airspeed. The results show that hot side temperature has the greatest influence on the output power, while the impact of wind speed is minimal.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Ding Luo, Yuying Yan, Ying Li, Xuelin Yang, Hao Chen
Summary: The automobile thermoelectric generator is a promising technology for improving fuel economy. By optimizing the fin distance and thickness of the heat exchanger, significant improvements in performance are observed, with increases in power, efficiency, net power, and net efficiency compared to the generator without fin optimizations.
Article
Thermodynamics
Ding Luo, Ying Li, Yuying Yan, Xiaoming Hu, Xi'an Fan, Wei-Hsin Chen, Yong Ren, Bingyang Cao
Summary: This study aims to address the low conversion efficiency of thermoelectric modules by introducing a novel periodic heating method. Testing and modeling analysis showed that the periodic heating method greatly improved the average efficiency and ZTta value of the thermoelectric modules. Additionally, recommendations for optimizing parameters were provided to further enhance the dynamic behavior.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Ding Luo, Yuying Yan, Wei-Hsin Chen, Xuelin Yang, Hao Chen, Bingyang Cao, Yulong Zhao
Summary: This paper proposes a comprehensive hybrid transient CFD-thermal resistance model for predicting the dynamic behavior of an automobile thermoelectric generator (ATEG) system. The model considers temperature dependencies, topological connections of thermoelectric modules, and dynamic characteristics, providing high accuracy and short computational time. The dynamic behavior of the ATEG system is analyzed using transient exhaust heat as the heat source input. The model results show that the dynamic output power of the ATEG system follows the same variation trend as the exhaust temperature, but with more stability. The model is experimentally validated, yielding mean deviations of 7.70% for output voltage and 1.12% for outlet air temperature. It serves as a convenient tool for evaluating the behavior of ATEG systems under different topological connections and assessing their dynamic performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Green & Sustainable Science & Technology
Minghui Ge, Zhiwei Xuan, Xionglei Liu, Ding Luo, Yulin Wang, Yanzhe Li, Yulong Zhao
Summary: This study investigates the effect of optimizing the structure of solar thermoelectric generators (STEGs) under the condition of allowed stress on their thermoelectric performance. The results show that the optimal structure considering allowed stress differs from the optimal structure without considering stress, and thermal stress has a significant impact on the optimized structural parameters under high concentration ratios.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Energy & Fuels
Minghui Ge, Zhiwei Xuan, Chenyang Zhao, Ding Luo, Yulin Wang, Yanzhe Li, Yulong Zhao
Summary: A new type of internal-arc thermoelectric leg is proposed to overcome the contradictory relationship between thermoelectric efficiency and thermal stress in solar thermoelectric generators (STEGs). The new leg shows excellent power output and lower thermal stress compared to the rectangular leg. The best configuration for STEGs depends on the concentration ratio, with the X-type leg preferred for lower ratios and the inner-arc type preferred for higher ratios. Further optimization of the inner-arc type leg can significantly increase the critical power density.
Review
Multidisciplinary Sciences
Kuan-Ting Lee, Da-Sheng Lee, Wei-Hsin Chen, Yu-Li Lin, Ding Luo, Young -Kwon Park, Argel Bandala
Summary: The recovery and power generation of waste heat are of great significance in reducing carbon emissions and addressing global warming. The commercialization of solid-state thermoelectric technology provides broader prospects for the utilization of low-temperature waste heat. However, factors such as power generation cost and energy utilization efficiency are still challenges for the commercialization of solid-state thermoelectric technology.
Article
Chemistry, Physical
Jin Cao, Yongxin Sun, Dongdong Zhang, Ding Luo, Lulu Zhang, Rungroj Chanajaree, Jiaqian Qin, Xuelin Yang, Jun Lu
Summary: A novel additive, sodium diphenylamine sulfonate (DASS), is proposed to regulate uniform zinc deposition and to suppress side reactions in an aqueous electrolyte. The DASS can adsorbed on the Zn anode surface due to the strong double coordination effect between N, S sites and Zn (ZnN, ZnS), which prevents interfacial side reactions and guides uniform electrodeposition of zinc ions.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Ruochen Wang, Yuxuan Fu, Ding Luo, Jie Chen, Weiqi Zhou
Summary: This study presents an innovative optimization method for a heat exchanger to improve the temperature uniformity and output performance of a thermoelectric generator. The results show that the optimization method can significantly enhance the temperature uniformity and output performance.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)
