Article
Energy & Fuels
Shuwei Jin, Yongping Li, Lei Yu
Summary: This paper introduces a fuzzy chance-constrained fractional programming (FCFP) method for planning distributed multi-energy systems (DMES), which was applied to a real airport in a case study. Results showed that the combined cooling, heat, and power were the primary distributed energy resource, providing significant heating, cooling, and electricity in different seasons. A comparison between conventional energy system (CES) and DMES revealed differences in energy consumption, economic aspects, and environmental performance, with DMES showing better environmental performance and peak shaving function.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
M. F. Roslan, M. A. Hannan, Pin Jern Ker, R. A. Begum, T. M. Indra Mahlia, Z. Y. Dong
Summary: This study presents the development of an optimal power scheduling controller using lightning search algorithm for energy management of distributed energy resources in a microgrid system. The optimized controller aims to minimize total operating costs, reduce environmental emissions, and solve complex constraint optimization problems. Comparative analysis shows that the lightning search algorithm offers a more cost-effective solution with significant cost savings and carbon dioxide emission reductions compared to other optimization algorithms.
Article
Engineering, Electrical & Electronic
Luka Strezoski, Harsha Padullaparti, Fei Ding, Murali Baggu
Summary: With the rapid integration of distributed energy resources, distribution utilities face new challenges, and distribution energy resource management systems (DERMSs) provide solutions to these challenges.
JOURNAL OF MODERN POWER SYSTEMS AND CLEAN ENERGY
(2022)
Article
Automation & Control Systems
Kaihong Lu, Hang Xu, Yuanshi Zheng
Summary: This paper studies the problem of distributed resource allocation with coupled equality, nonlinear inequality, and convex set constraints. A new distributed primal-dual algorithm is proposed for addressing this problem in a continuous-time multi-agent system under a time-varying graph. Two consensus strategies are employed to estimate the coupled equality constraint function and the corresponding optimal dual variable. A novel Lyapunov function is constructed to analyze the convergence of the algorithm based on a strongly convex function. The results show that the algorithm asymptotically converges to the solution of the distributed resource allocation problem if the time-varying graph is balanced and the union in a certain period is strongly connected.
Article
Energy & Fuels
Sanjana Vijayshankar, Chin-Yao Chang, Kumar Utkarsh, Dylan Wald, Fei Ding, Sivasathya Pradha Balamurugan, Jennifer King, Richard Macwan
Summary: This paper investigates the cyber resiliency of future power systems with high penetration of distributed energy resources using advanced distributed and (or) hierarchical control architectures. Specifically, cyberattacks on three prototypical use cases are simulated, and attack scenarios that have the most damaging impact on overall system performance are identified. It is shown that these attacks can significantly affect grid operation. Results provide additional insights into the robustness of the system to the most common cyberattacks.
Article
Automation & Control Systems
Zhongguo Li, Zhengtao Ding
Summary: This article formulates a distributed multiobjective optimization problem for resource allocation in network-connected multiagent systems. Novel distributed algorithms are proposed to solve the problem using the weighted L-p preference index without specifying unknown parameters. The framework does not require prior information and can protect private data effectively using a distributed approach.
IEEE TRANSACTIONS ON CYBERNETICS
(2021)
Article
Construction & Building Technology
Liwei Ju, Liling Huang, Hongyu Lin, Hanfang Li, Zhongfu Tan
Summary: The study focused on the optimization problem of micro energy grids participating in bidding games with a utility energy grid. Multi-level bidding game strategies and an improved ant colony optimization algorithm were proposed, leading to the conclusion that the global optimum solution for multi-MEGs operation can be achieved through the strategies and algorithm. The research also highlighted the effectiveness of price-based demand response in converting renewable power into different forms of energy and increasing bidding revenue in a more liberalized energy market.
SUSTAINABLE CITIES AND SOCIETY
(2021)
Article
Automation & Control Systems
Shiling Li, Xiaohong Nian, Zhenhua Deng, Zhao Chen, Qing Meng
Summary: This article investigates a resource allocation problem of second-order nonlinear multiagent systems, proposing a distributed protocol for agents based on gradient descent and analyzing the global convergence of the algorithm by constructing a suitable Lyapunov function. Examples are provided to illustrate the results.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2021)
Article
Automation & Control Systems
Da Xu, Bin Zhou, Nian Liu, Qiuwei Wu, Nikolai Voropai, Canbing Li, Evgeny Barakhtenko
Summary: This article proposes a peer-to-peer transactive multiresource trading framework for multiple multienergy microgrids, addressing the optimization problem of multiple resources and independent decision-makings. The methodology developed can optimize communication and energy flows through Nash bargaining problem and decomposition, showing superiority in system operational economy and resource utilization.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2021)
Article
Energy & Fuels
Qing Yang, Hao Wang, Taotao Wang, Shengli Zhang, Xiaoxiao Wu, Hui Wang
Summary: The emergence of distributed energy resources has a disruptive impact on centralized power systems, leading to the necessity of shifting towards a decentralized power system with bidirectional power flow. The virtual power plant (VPP) is seen as a promising solution for managing DERs. This study develops a blockchain-based VPP energy management platform for transactive energy activities among residential users, validating its feasibility and effectiveness through experiments using real-world data trace.
Article
Engineering, Electrical & Electronic
Merkebu Zenebe Degefa, Iver Bakken Sperstad, Hanne Saele
Summary: Flexibility is becoming increasingly important in future power systems due to the integration of renewable energy, ageing infrastructure, and rising peak demand. However, there is still a lack of consensus on the definition of flexibility and terms for characterizing flexibility resources, which may hinder information exchange.
ELECTRIC POWER SYSTEMS RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Rabayet Sadnan, Anamika Dubey
Summary: The paper introduces a new distributed optimization method based on Equivalent Network Approximation (ENApp) for solving optimization problems in power distribution systems. By leveraging the radial topology of the distribution system, the communication rounds required for convergence are significantly reduced, achieving the same optimal solution as centralized optimization methods.
IEEE TRANSACTIONS ON POWER SYSTEMS
(2021)
Article
Thermodynamics
Pei Huang, Yongjun Sun, Marco Lovati, Xingxing Zhang
Summary: A hierarchical design method for distributed batteries in solar power shared building communities is proposed to reduce battery capacity and minimize energy loss. By considering all distributed batteries as a virtual "shared" battery and optimizing capacities using genetic algorithm and non-linear programming, significant reductions in battery capacity and electricity loss in sharing process can be achieved. The study integrates considerations of energy needs, local PV power sharing, community control, and battery storage sharing, aiming to optimize functions in positive energy districts.
Article
Energy & Fuels
Md Shahin Alam, Seyed Ali Arefifar
Summary: Multi-microgrids have gained significant attention due to their ability to integrate different distributed energy resources, providing a more flexible and efficient power grid. This research focuses on finding optimal location and operation of mobile energy storage in multi-microgrid systems during extreme events, aiming to maximize system resiliency. The study also investigates the impact of IoT application in mobile energy storage operation, as well as the uncertainty of demand and price on operational performance. By using simulations on a popular multi-microgrid power distribution network, the research highlights the importance of optimizing mobile energy storage and energy sharing strategies for improving operational performance.
Review
Thermodynamics
Ali Reza Abbasi, Dumitru Baleanu
Summary: Energy management is crucial for the sustainable development of human society, particularly in microgrids where an energy management system plays a key role in ensuring efficient and reliable operations. Recent research has focused on expanding energy management strategies for microgrids in order to establish self-sustaining energy systems. This study provides a comprehensive analysis of the development of energy management strategies for microgrids from 2009 to 2022, offering new directions for future research.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Engineering, Chemical
Jianlin Li, Ti Wang, Pei Liu, Zheng Li
Summary: A universal and hybrid post-combustion capture model is proposed in this study, based on first-principle approach and validated using experimental data. The analysis suggests that tower height should be designed in conjunction with flue gas flow, and the gas-liquid ratio can be optimized to reduce reboiler power under a certain capture target.
FRONTIERS OF CHEMICAL SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Chemical
Jinze Li, Pei Liu, Zheng Li
Summary: This study demonstrates the techno-economic feasibility of a stand-alone hybrid renewable energy system for remote rural communities, showing that the system is cost-competitive and helps reduce carbon emissions.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2022)
Article
Energy & Fuels
Yuanzhe Zhang, Pei Liu, Zheng Li
Summary: Inlet temperature is crucial for the thermal efficiency of gas turbines, and blade cooling is a key method to maintain high inlet temperatures. However, the use of thermal barrier coatings (TBCs) for cooling may change the heat transfer characteristics and pose challenges in calculating internal temperature and thermal efficiency. This study analyzes the impact of TBC thickness on the performance of gas turbines and proposes an improved mathematical model to consider the cooling effect of TBCs.
Article
Thermodynamics
Siming Song, Tianxiao Li, Pei Liu, Zheng Li
Summary: Achieving carbon neutrality requires reshaping energy supply systems, with a focus on infrastructure layout in system planning to improve transition feasibility. Results indicate that power systems and hydrogen systems will dominate in carbon neutral energy systems, and more efforts are needed beyond 2030 to achieve carbon neutrality.
Article
Green & Sustainable Science & Technology
Yayu Xiao, Honghua Yang, Yunlong Zhao, Geng Kong, Linwei Ma, Zheng Li, Weidou Ni
Summary: This paper proposes a comprehensive methodology to address the gap in LCET planning for rapidly growing cities. Through a theoretical framework and a three-step method, the energy-related CO2 emissions and obstacles to achieving carbon peak in Chengdu city have been studied.
Article
Computer Science, Interdisciplinary Applications
Jinze Li, Pei Liu, Zheng Li
Summary: This paper demonstrates the techno-economic feasibility and flexibility of hybrid renewable energy systems for rural electrification, using a case study of a village in West China. The results show that a hybrid system comprising solar, wind, and biomass is reliable, cost-effective, and brings environmental and social benefits.
COMPUTERS & CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Shuo Sun, Linwei Ma, Zheng Li
Summary: This paper aims to estimate methane emission data in China's oil and gas sector to guide emission mitigation activities. The study reveals that the production stage of natural gas is the main contributor, and there is still potential for reducing methane emissions through technological development.
Article
Thermodynamics
Jianxi Yu, Wenquan Han, Kang Chen, Pei Liu, Zheng Li
Summary: Maintaining the accuracy of isentropic efficiency calculation for steam turbine systems is challenging due to gross errors in measurements. This study proposes a data reconciliation model with inequality constraints and statistical tests to effectively detect and eliminate gross errors, improving the thermal calculation accuracy.
Article
Engineering, Chemical
Chenxi Li, Pei Liu, Zheng Li
Summary: This study uses a multi-regional model to quantify the optimal decarbonisation path for the transport sector and finds that electricity and hydrogen will be the major fuels in the future. Freight transport has reached its CO2 emissions peak, while passenger transport will reach its peak around 2041. Giving priority to decarbonisation in freight transport can save costs.
Article
Thermodynamics
Yuanzhe Zhang, Pei Liu, Zheng Li
Summary: This paper proposes an off-design behavior model for gas turbines and investigates the impacts of ambient conditions on their performances. Through case studies, it is found that ambient temperature has the most significant influence and can improve the efficiency, power output, and load regulation capacity of gas turbines.
Article
Thermodynamics
Binglin Du, Pei Liu, Zheng Li
Summary: This study focuses on the transformation of coal power plants in the power and heating sectors. By using an optimization model, the optimal low-carbon transition pathway for both sectors is determined, and the pathway of coal power plants is analyzed. The study finds that considering the heating production to the central heating sector results in significant changes in regional distribution, although there is only a slight increase in remaining capacity.
Review
Green & Sustainable Science & Technology
Aofang Yu, Lingli Xing, Wen Su, Pei Liu
Summary: This article provides a state-of-the-art review of CO2 combined power and cooling systems. It introduces various system configurations and structures, presents existing models for system performance analysis, and determines the performances of power, refrigeration, and combined cycles using CO2 and CO2 mixtures as working fluids. The review finds that current system configurations are based on researchers' experience, the optimal organic fluids for CO2 mixtures are usually found through trial-and-error, and there are no unified criteria for system construction and fluid selection. Most research focuses on steady-state performance, with limited studies on dynamic performance and experiments. Promising future research directions include intelligent system structure construction, organic fluid screening in CO2 mixtures, dynamic simulation, and experimental research.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Green & Sustainable Science & Technology
Jiankun He, Zheng Li, Xiliang Zhang, Hailin Wang, Wenjuan Dong, Ershun Du, Shiyan Chang, Xunmin Ou, Siyue Guo, Zhiyu Tian, Alun Gu, Fei Teng, Bin Hu, Xiu Yang, Siyuan Chen, Mingtao Yao, Zhiyi Yuan, Li Zhou, Xiaofan Zhao, Ying Li, Danwei Zhang
Summary: As the world's largest carbon emitter, China must make significant efforts to peak its emissions by 2030 and achieve carbon neutrality by 2060. This study examines different scenarios and evaluates the pathways, energy transformation, technology, policy, and investment demands necessary for carbon neutrality. The findings highlight the challenges and investment requirements for China to achieve its carbon neutrality goals.
ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
(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)
