Article
Thermodynamics
Xin Wen, Jie Ji, Zhiying Song, Zhaomeng Li
Summary: This paper proposes and discusses a concentrated hybrid power/thermal system that utilizes solar thermal energy and thermoelectric generators for heat recovery and power generation. Theoretical investigations show that the system's heat gain and electrical power are correlated with solar radiation. The system with a linear Fresnel lens outperforms the system with a compound parabolic concentrator in terms of thermal and electrical performance.
APPLIED THERMAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Behzad Ranjbar, Mehdi Mehrpooya, Mohammad Marefati
Summary: A novel solar driven hybrid system composed of a concentrated solar collector, thermionic generator, and thermoelectric device has been proposed, with analytical investigations on power output and efficiency. The design parameters affecting system performance have been studied, with two different scenarios considered for the data of five cities in Asia. Results show that the increase in ratio of resistances does not have a significant effect on the efficiency and power of the process.
Article
Thermodynamics
Ming Zhao, Shuoyang Fang, Zhizhong Jiang, Jie Yu
Summary: This study proposes a novel mathematical model of a static hybrid power generator composed of a cesium thermionic energy converter (CTEC) and a thermoelectric generator (TEG). The model considers the irreversible heat loss and energy barriers of the CTEC module, as well as the Thomson effect of the TEG module. The effects of various parameters on the output performance were systematically investigated using MATLAB. The results show that the hybrid generator achieves a maximum efficiency of 26.82% at specific temperatures and reducing the anode work function significantly improves the output power and efficiency.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Junwei Zhao, Wei Xu, Zhengfei Kuang, Rui Long, Zhichun Liu, Wei Liu
Summary: This study presents a seven-layer segmented thermoelectric generator with optimized material sequences for each semiconductor leg, resulting in improved electric power and energy conversion efficiency. Machine learning and ensemble-based regression model are employed to reveal the relationship between leg material sequences and the performance of the STEG. The results contribute to the rational design and fabrication of satisfactory STEGs.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Kehinde G. Ismaila, Ahmet Z. Sahin, Bekir S. Yilbas
Summary: The exergo-economic analysis of a concentrated photovoltaic-thermoelectric generator (CPV-TEG) hybrid system showed that the system is more cost effective compared to using a concentrated photovoltaic (CPV) system alone. Optimization results indicated that integrating CPV and TEG may not be feasible in certain operating conditions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Song Lv, Bolong Zhang, Yishuang Ji, Juwen Ren, Jiahao Yang, Yin Lai, Zhihao Chang
Summary: To solve the problem of low power generation in currently developed RC-TEG devices, this paper demonstrated a promising C-RC-TEG device based on high radiation and thermal concentration. The experimental prototype utilized solar energy and radiative cooling to generate a temperature difference for driving TEG electricity generation. Results showed that solar irradiance and radiative cooling area had a positive effect on the C-RC-TEG model. Additionally, wind speed was found to decrease power generation. Concentrator in the light focusing area achieved a maximum power generation of 47 mW and a temperature difference of 7 K. This work provides guidance on effectively converting solar energy and radiative cooling into electricity.
Article
Energy & Fuels
Minghui Ge, Zhiwei Xuan, Guoyin Zhang, Yuntong Zhao, Yulong Zhao
Summary: This study investigates the effect of non-uniform heat flux on the performance of solar thermoelectric generators through a numerical model. The results show that the non-uniformity of heat flux leads to increased temperature and reduced output power.
Article
Energy & Fuels
Dianhong Li, Yimin Xuan
Summary: This study proposes a hybrid solar thermophotovoltaic-thermoelectric (STPV-TE) system to improve the efficiency of a solar thermophotovoltaic (STPV) system by utilizing high-temperature thermal radiation. The non-contact installation method between the thermophotovoltaic (TPV) cell and thermoelectric (TE) module eliminates temperature interaction and a theoretical model and analysis method for the hybrid STPV-TE system are established. Experimental results show that the STPV-TE system promotes the efficiency of the STPV system.
Article
Thermodynamics
Haythem Sahli, Mouna Elakhdar, Bourhan Tashtoush, Ezzedine Nahdi
Summary: This paper investigates a hybrid solar/thermoelectric generator/absorption cooling system, where waste heat is used to meet the electrical demand of the cooling system, achieving self-sufficiency. The study finds that the optimal location for the TEG modules is between the hot water storage tank and the ambient air.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Construction & Building Technology
Hao Dong, Ju'e Guo, Jinbao Liu, Tingting Meng, Minglu Li, Ximeng Chen, Na Li, Hosein Alavi
Summary: The study introduces a new energy system that converts solar energy into thermal energy and then into electrical energy through a Stirling engine and thermoelectric generator. The system can produce both electricity and hydrogen fuel simultaneously, providing potential for sustainable development in urban areas.
SUSTAINABLE CITIES AND SOCIETY
(2021)
Article
Green & Sustainable Science & Technology
Yuewu Huang, Xingguo Chen, Zhuo Chen
Summary: A novel cogeneration system, consisting of a dye-sensitized solar cell (DSSC), a solar selective absorber (SSA), and a two-stage annular thermoelectric generator (ATTEG), is developed to effectively utilize solar energy. The hybrid system converts short-wavelength solar energy into electricity using DSSC, while long-wave solar energy is converted into thermal energy by SSA to drive ATTEG for additional electricity generation. Mathematical equations for performance indicators are derived to investigate the energy relationship between DSSC and ATTEG. A comprehensive comparison of the hybrid system's performance with different solar irradiance and operating temperature is outlined. The study demonstrates the superior energy and exergy efficiency of DSSC-ATTEG compared to standalone DSSC, offering valuable insights into waste heat recovery from round shaped heat sources through detailed parameter analyses.
Article
Mathematics
Alaa A. Zaky, Mohamed N. Ibrahim, Ibrahim B. M. Taha, Bedir Yousif, Peter Sergeant, Evangelos Hristoforou, Polycarpos Falaras
Summary: This study proposes a high-power-density hybrid perovskite solar cell-thermoelectric generator array for driving a water pump system. Through control techniques, maximum torque/ampere and maximum power point tracking are achieved, avoiding issues of short lifespan and high replacement cost. Simulation and experimental results demonstrate the high-performance efficiency and cost reduction of the system.
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
Kai-Qi Zhong, Yang Xiao, Xing Lu, Jun Deng, Lan Yin, Yuan Tian, Chi-Min Shu
Summary: The study established a waste heat recovery system by using nanofluid working fluid and copper oxide nanoparticles to enhance thermal extraction efficiency. By optimizing the thermosiphon, the thermoelectric conversion efficiency was improved.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Yan Cao, Nidal H. Abu-Hamdeh, Hazim Moria, Soheil Asaadi, Radi Alsulami, Hamed Sadighi Dizaji
Summary: This paper proposes a thin-film flexible annular solar thermoelectric generator for curved and variable surfaces, and conducts a comprehensive simulation to investigate the impact of various parameters on the generator's performance. The study reveals insights such as the optimal number of legs and inner radius for maximizing output power.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Environmental
Ashwin Ramachandran, Diego I. Oyarzun, Steven A. Hawks, Michael Stadermann, Juan G. Santiago
Editorial Material
Engineering, Chemical
Ashwin Ramachandran, Diego I. Oyarzun, Steven A. Hawks, Patrick G. Campbell, Michael Stadermann, Juan G. Santiago
Article
Engineering, Environmental
Steven A. Hawks, Maira R. Ceron, Diego I. Oyarzun, Tuan Anh Pham, Cheng Zhan, Colin K. Loeb, Daniel Mew, Amanda Deinhart, Brandon C. Wood, Juan G. Santiago, Michael Stadermann, Patrick G. Campbell
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2019)
Article
Chemistry, Physical
Diego I. Oyarzun, Steve A. Hawks, Patrick G. Campbell, Ali Hemmatifar, Ashish Krishna, Juan G. Santiago, Michael Stadermann
JOURNAL OF POWER SOURCES
(2020)
Article
Chemistry, Analytical
Diego A. Huyke, Ashwin Ramachandran, Diego I. Oyarzun, Thomas Kroll, Daniel P. DePonte, Juan G. Santiago
ANALYTICA CHIMICA ACTA
(2020)
Article
Nanoscience & Nanotechnology
Maira R. Ceron, Fikret Aydin, Steven A. Hawks, Diego Oyarzun, Colin K. Loeb, Amanda Deinhart, Cheng Zhan, Tuan Anh Pham, Michael Stadermann, Patrick G. Campbell
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Engineering, Environmental
Noelle R. Catarineu, Dun Lin, Cheng Zhu, Diego I. Oyarzun, Yat Li
Summary: Researchers synthesized a nitrogen-doped hierarchically porous carbon cathode through 3D printing and pyrolysis of a zinc-based metal-organic framework ZIF-8. This cathode demonstrated excellent cycling and mechanical stability and when incorporated into a zinc-ion hybrid capacitor, it exhibited an areal capacitance of 16.9 F cm-2 and energy density of 7.23 mW h cm-2, outperforming conventional cathodes.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Thomas Moore, Diego I. Oyarzun, Wenqin Li, Tiras Y. Lin, Maxwell Goldman, Andrew A. Wong, Shaffiq A. Jaffer, Amitava Sarkar, Sarah E. Baker, Eric B. Duoss, Christopher Hahn
Summary: In low-temperature CO2 electrolysis, the optimal single-pass CO2 conversion for ethylene production is typically low, around 5%-10%, but larger optima can be found with very low H2 faradic efficiency. Eliminating carbonate crossover strategies require more energy than downstream gas separation if they increase the cell potential by X0.2 V. However, when considering CAPEX, the break-even voltage increases to -0.4 to 0.8 V for electricity prices ranging from 6c/kWh to 1.5c/kWh. These findings highlight the importance of maintaining near-optimal electrolyzer performance over reducing or eliminating downstream gas separations.
Article
Chemistry, Multidisciplinary
Nathan C. Ellebracht, Pratanu Roy, Thomas Moore, Aldair E. Gongora, Diego I. Oyarzun, Joshuah K. Stolaroff, Du T. Nguyen
Summary: Using additive manufacturing and computational fluid dynamics, we screened and manufactured structured packings in the vast design space. Testing revealed that 3D-printed triply periodic minimal surfaces (TPMS) packings improved mass transfer performance by 49-61% and increased effective gas-liquid interfacial area by 91-140% compared to the representative industrial packing. These advanced packings also demonstrated similar or better maximum fluid loads and pressure drops, potentially reducing absorber capital costs by more than 30%.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Correction
Biochemical Research Methods
Amir Saadat, Diego A. Huyke, Diego I. Oyarzun, Paulina V. Escobar, Ingrid H. Ovreeide, Eric S. G. Shaqfeh, Juan G. Santiago
Article
Chemistry, Multidisciplinary
Fikret Aydin, Maira R. Ceron, Steven A. Hawks, Diego I. Oyarzun, Cheng Zhan, Tuan Anh Pham, Michael Stadermann, Patrick G. Campbell
Article
Biochemical Research Methods
Amir Saadat, Diego A. Huyke, Diego Oyarzun, Paulina Escobar, Ingrid H. Ovreeide, Eric S. G. Shaqfeh, Juan G. Santiago
Article
Engineering, Environmental
Helen A. Kuo, Ashwin Ramachandran, Diego I. Oyarzun, Erica C. Clevenger, Juan G. Santiago, Michael Stadermann, Patrick G. Campbell, Steven A. Hawks
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2020)
Article
Engineering, Environmental
Diego Oyarzun, Ali Hemmatifar, James W. Palko, Michael Stadermann, Juan G. Santiago
Article
Thermodynamics
Pengcheng Zhao, Jingang Wang, Liming Sun, Yun Li, Haiting Xia, Wei He
Summary: The production of green hydrogen through water electrolysis is crucial for renewable energy utilization and decarbonization. This research explores the optimal electrode configuration and system design of compactly-assembled industrial electrolyzer. The findings provide valuable insights for industrial application of water electrolysis equipment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
V. Baiju, P. Abhishek, S. Harikrishnan
Summary: Thermally driven adsorption desalination systems (ADS) have gained attention as an eco-friendly solution for water scarcity. However, they face challenges related to low water productivity and scalability. To overcome these challenges, integrating ADS with other desalination technologies can create a small-scale hybrid system. This study proposes integrating ADS with a Thermo Electric Dehumidification (TED) unit to enhance its performance.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
C. X. He, Y. H. Liu, X. Y. Huang, S. B. Wan, Q. Chen, J. Sun, T. S. Zhao
Summary: A decentralized centroid multi-path RC network model is constructed to improve the temperature prediction accuracy compared to traditional RC models. By incorporating multiple heat flow paths and decentralizing thermal capacity, a more accurate prediction is achieved.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chaoying Li, Meng Wang, Nana Li, Di Gu, Chao Yan, Dandan Yuan, Hong Jiang, Baohui Wang, Xirui Wang
Summary: There is an urgent need to shift away from heavy dependence on fossil fuels and embrace renewable energy sources, particularly in the energy-intensive oil refining process. This study presents an innovative concept called the Solar Oil Refinery, which applies solar energy in oil refining. A solar multi-energies-driven hybrid chemical oil refining system that utilizes solar pyrolysis and electrolysis has been developed, significantly improving solar utilization efficiency, cracking rate, and hydrogen yield.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Chao Ma, Guanghui Wang, Dingbiao Wang, Xu Peng, Yushen Yang, Xinxin Liu, Chongrui Yang, Jiaheng Chen
Summary: This study proposes a bio-inspired fish-tail wind rotor to improve the wind power efficiency of the traditional Savonius rotor. Through transient simulations and orthogonal experiments, the key factors affecting the performance are identified. A response surface model is constructed to optimize the power coefficient, resulting in an improvement of 9.4% and 6.6% compared to the Savonius rotor.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sina Bahmanziari, Abbas-Ali Zamani
Summary: This paper proposes a new framework for improving electrical energy harvesting from piezoelectric smart tiles through a combination of magnetic plucking, mechanical impact, and mechanical vibration force mechanisms. Experimental results demonstrate a significant increase in energy yield and average energy harvesting time compared to other mechanisms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Nanjiang Dong, Tao Zhang, Rui Wang
Summary: This study establishes a multiobjective mixed-variable configuration optimization model for a comprehensive combined cooling, heating, and power energy system, and proposes an efficient generating operator to optimize this model. The experimental results show that the proposed algorithm performs better than other state-of-the-art algorithms.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Ahmed E. Mansy, Eman A. El Desouky, Tarek H. Taha, M. A. Abu-Saied, Hamada El-Gendi, Ranya A. Amer, Zhen-Yu Tian
Summary: This study aims to convert office paper waste into bioethanol through a sustainable pathway. The results show that physiochemical and enzymatic hydrolysis of the waste can yield a high glucose concentration. The optimal conditions were determined using the Box-Behnken design, and a blended membrane was used for ethanol purification.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Sven Klute, Marcus Budt, Mathias van Beek, Christian Doetsch
Summary: Heat pumps are crucial for decarbonizing heat supply, and steam generating heat pumps have the potential to decarbonize the industrial sector. This paper presents the current state, technical and economic data, and modeling principles of steam generating heat pumps.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Le Zhang, To-Hung Tsui, Yen Wah Tong, Pruk Aggarangsi, Ronghou Liu
Summary: This study investigates the effectiveness of a current-carrying-coil-based magnetic field in promoting anaerobic digestion of chicken manure. The results show that the applied magnetic field increases methane yield, decreases carbon dioxide production, and reduces the concentration of ammonia nitrogen. Microbial community analysis reveals the enrichment of certain methanogenic genera and enhanced metabolic pathways. Pilot-scale experiments confirm the technical effectiveness of the magnetic field assistance in enhancing anaerobic digestion of chicken manure.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Bo Chen, Ruiqing Ma, Yang Zhou, Rui Ma, Wentao Jiang, Fan Yang
Summary: This paper presents an advanced energy management strategy for fuel cell hybrid electric heavy-duty vehicles, focusing on speed planning and energy allocation. By utilizing predictive co-optimization control, this strategy ensures safe inter-vehicle distance and minimizes energy demand. Simulation results demonstrate the effectiveness of the proposed method in reducing fuel cell degradation cost and overall operation cost.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Fabio Fatigati, Roberto Cipollone
Summary: Organic Rankine Cycle-based microcogeneration systems that use solar sources to generate electricity and hot water can help reduce CO2 emissions in residential energy-intensive sectors. The adoption of a recuperative heat exchanger in these systems improves efficiency, reduces thermal power requirements, and saves on electricity costs.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Lipeng He, Renwen Liu, Xuejin Liu, Xiaotian Zheng, Limin Zhang, Jieqiong Lin
Summary: This research proposes a piezoelectric-electromagnetic hybrid energy harvester (PEHEH) for low-frequency wave motion and self-sensing wave environment monitoring. The PEHEH shows promising power output and the ability to self-power and self-sense the wave environment.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Shangling Chu, Yang Liu, Zipeng Xu, Heng Zhang, Haiping Chen, Dan Gao
Summary: This paper studies a distributed energy system integrated with solar and natural gas, analyzes the impact of different parameters on its energy utilization and emissions reduction, and obtains the optimal solution through an optimization algorithm. The results show that compared to traditional separation production systems, this integrated system achieves higher energy utilization and greater reduction in carbon emissions.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Thermodynamics
Qingpu Li, Yaqi Ding, Guangming Chen, Yongmei Xuan, Neng Gao, Nian Li, Xinyue Hao
Summary: This paper proposes and studies a piston-type thermally-driven pump with a structure similar to a linear compressor, aiming to eliminate the high-quality energy consumption of existing pumps and replace mechanical pumps. The coupling mechanism of working fluid flow and element dimension is analyzed based on force analysis, and experimental data analysis is used to determine the pump operation stroke. Theoretical simulation is conducted to analyze the correlation mechanism of the piston assembly. The research shows that the thermally-driven pump can greatly reduce power consumption and has potential for industrial applications.
ENERGY CONVERSION AND MANAGEMENT
(2024)