Article
Energy & Fuels
Chenyun Pan, Hongtao Fan, Ruixiang Zhang, Jie Sun, Yu Wang, Yaojie Sun
Summary: In this paper, an improved multi-timescale coordinated control strategy is proposed for an integrated energy system (IES) with a hybrid energy storage system (HESS) to address the complex energy coupling and fluctuation of renewable energy sources. The power response characteristics of various devices in IES at different time scales are analyzed, demonstrating the effectiveness of the multi-timescale coordinated control method in coupling with the IES. The advantages of HESS in stabilizing power fluctuation and extending energy storage life are compared, and a control method for supercapacitor under multi-timescale coordinated control strategy is proposed.
Article
Energy & Fuels
Xiaoou Liu
Summary: With the growing proportion of renewable energy generation connected to the grid, the architecture, control method, and operation mode of the energy system are changing. The introduction of blockchain technology into the energy system to form an energy blockchain network helps to solve information security issues and others.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Min Wu, Pengcheng Du, Meihui Jiang, Hui Hwang Goh, Hongyu Zhu, Dongdong Zhang, Thomas Wu
Summary: For the purpose of increasing the energy efficiency of the city's energy supply, adopting the joint planning of an integrated energy system is an effective approach. However, formulating the coupling matrix in the integrated energy system is quite challenging. In this paper, a standardized construction method for modeling an Energy Hub is proposed, which involves several steps. Additionally, a comprehensive energy system optimization strategy is proposed using an improved particle swarm optimization algorithm, taking into account the nonlinear problem caused by dispatch factors. The effectiveness of the proposed modeling and calculation method is verified using an example of a residential area with cooling, heating, and electricity system. Furthermore, the impact of demand response and energy storage on the economy during operation is analyzed.
Article
Thermodynamics
Asli Ergenekon Arslan, Oguz Arslan, Suheyla Yerel Kandemir
Summary: This study evaluated the Simav Integrated Geothermal Energy System using TOPSIS and a new model combining AHP. It determined the best design, analyzed aspects such as energy, electricity generation, and economy, and concluded that installing the integrated system at lower outlet temperatures is the optimal application.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Kavita Singh, Mamta Dahiya, Ashish Grover, Richa Adlakha, Mohammad Amir
Summary: This study proposes an effective (1 + TD)-TID cascade regulator to address the issue of load frequency control inefficiency. The regulator is efficient and interfaces the output of a 1 + TD regulator with the inputs of a TID regulator. The study aims to examine the load frequency control issue and explore the coordination of 2-area thermal systems with renewable energy sources and nonlinearities.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Xiaozhu Li, Weiqing Wang, Haiyun Wang
Summary: The study presents a hybrid time-scale energy optimal scheduling model based on game interaction with supply and demand, which effectively addresses the complex energy coupling and competition among multiple market entities in integrated energy systems. The results demonstrate that the strategy can balance the economy and robustness, improving the profit benefit of the integrated energy system and increasing the benefits of market entities.
Article
Engineering, Marine
Yuanjie Ren, Lanyong Zhang, Peng Shi, Ziqi Zhang
Summary: A hierarchical collaborative control energy management scheme is proposed for the propulsion system of hybrid electric ships. The scheme effectively solves the problems of steady-state oscillation and deviation from the tracking direction caused by volatility and uncertainty, achieving significant improvement.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Thermodynamics
Junhui Meng, Nuo Ma, Fanmin Meng, Xiaohui Zhang, Li Liu
Summary: This paper studies a hybrid energy system for a multi-lobes hybrid air vehicle (HAV), which uses solar cells, fuel cells, and lithium batteries as energy sources. By establishing a rule-based power-following management strategy, different energy subsystems can be better managed to achieve optimal flight performance for HAV.
Article
Thermodynamics
Yuchun Li, Jinkuan Wang, Yan Zhang, Yinghua Han
Summary: A novel hybrid optimization method for the day ahead scheduling of an integrated heating and power system is proposed in this paper. The method addresses the uncertainties on both the supply and demand sides using scenario-based stochastic analysis and the information gap decision theory. The heating system is utilized as a virtual storage for managing wind power dispatch. The concept of price-based integrated demand response is introduced to enhance the system economic.
Article
Green & Sustainable Science & Technology
Joshi Sukhdev Nirbheram, Aeidapu Mahesh, Ambati Bhimaraju
Summary: In this paper, a novel hybrid demand response program (DRP) and energy management strategy (EMS) are proposed to improve the efficiency of power systems. The hybrid DRP combines time-of-use and incentive-based methods, while the EMS utilizes variations in grid tariff to charge the energy storage system at low cost. The results of a case study show that the hybrid DRP reduces peak demand and energy cost, and the EMS further decreases the cost.
Article
Thermodynamics
Ahmed Fathy, Dalia Yousri, Turki Alanazi, Hegazy Rezk
Summary: This paper proposes an energy management strategy based on the parasitism-predation algorithm for hybrid renewable energy sources to supply aircraft in emergency situations. The strategy aims to minimize hydrogen consumption and improve aircraft power durability, showing superior efficiency and minimum hydrogen consumption in experimental results.
Article
Green & Sustainable Science & Technology
Yanhua Li, Xilian Wang, Xinyu Fang, Yuenan Liu, Pengyu Zhao, Ruizhen Cui
Summary: An hydraulic energy-storage wave energy conversion system is developed and analyed in this paper, with stable operation, feasible topology scheme, modulation algorithm and control strategy. AC-side harmonics are effectively suppressed.
Article
Energy & Fuels
Chun Wang, Rui Liu, Aihua Tang
Summary: In this paper, a genetic algorithm (GA)-optimized fuzzy control energy management strategy for electric vehicles is proposed, which can improve the energy economy of electric vehicles.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Minghao Guo, Wei Wang, Renhui Chen
Summary: This paper presents a new renewable hybrid energy power system and studies a scheduling strategy considering demand response. The simulation analysis shows that the proposed strategy can significantly reduce operating costs.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Sihua Huang, Noor Azizi Mohd Ali, Nazlina Shaari, Mohd Sallehuddin Mat Noor
Summary: This paper proposes a load forecasting method based on feature clustering, which analyzes the correlation degree of control factors and the influence of environmental factors on loads, extracts feature vectors using convolutional neural networks, establishes clustering models for various energy loads, and obtains accurate load forecasting results.
Article
Green & Sustainable Science & Technology
Weiwu Ma, Yucong Zhang, Jiaqian Fan, Xiaotian Wu, Gang Liu
Summary: This paper proposes a novel data-driven long-term energy planning method for developing countries, which can help them formulate appropriate energy expansion schemes, considering excessive power generation of renewable energy and energy self-sufficiency.
JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
(2022)
Article
Green & Sustainable Science & Technology
Gang Liu, Jie Zeng, Yanjie Wu, Shengming Liao
Summary: This study evaluates the technical and economic performance of solar photovoltaic/wind hybrid renewable power systems in 14 cities in Xinjiang province. The results show a clear linear correlation between technical and economic indicators and solar radiation or wind speed, with wind speed having a better fitting effect. Most cities have satisfactory technical and economic performance for photovoltaic systems, but wind power systems are not profitable.
IET RENEWABLE POWER GENERATION
(2022)
Article
Thermodynamics
Gang Liu, Zhengwei Yuan, Chunwei Zhou, Zhijing Fu, Zhenghua Rao, Shengming Liao
Summary: Non-planar fractures are crucial for the efficient operation of enhanced geothermal systems as they greatly impact heat and mass transfer. In this study, the influences of non-planar fractures, continuity, and fracture networks on production temperature, mass flow rate, and power generation rate were comprehensively investigated using thermal-hydraulic-mechanical coupling and finite element methods. Results show that non-planar and continuous fractures reduce flow resistance and fluid leakage, leading to improved heat output.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Xia Zhou, Hanwei Zhang, Yangyiming Rong, Jian Song, Song Fang, Zhuoren Xu, Xiaoqin Zhi, Kai Wang, Limin Qiu, Christos N. Markides
Summary: The annual energy consumption of cryogenic air separation units in China is high, with a significant amount of energy dissipated as waste heat during compression processes. The use of organic Rankine cycle (ORC) based waste heat recovery systems can effectively recover and utilize this waste heat, bringing economic and environmental benefits. Case studies and analysis show that the ORC-m-VCR system performs the best when the expansion work-electricity conversion efficiency is low.
Article
Energy & Fuels
Weiwu Ma, Chong Yang, Shams Forruque Ahmed, N. M. S. Hassan, Huichao Cui, Xiaotian Wu, Gang Liu
Summary: This study analyzes the influence of the thermophysical parameters of fracturing fluid on the damage of hot dry rocks (HDR). The results show that increasing density and specific heat capacity decrease rock damage volume, while increasing thermal conductivity increases rock damage volume. The impacts of volume compressions and viscosity on rock damage are not always consistent, but vary. Low liquid permeability results in a larger volume of rock damage.
GEOMECHANICS FOR ENERGY AND THE ENVIRONMENT
(2022)
Article
Thermodynamics
Hanying Jiang, Yangyiming Rong, Xia Zhou, Song Fang, Kai Wang, Xiaoqin Zhi, Limin Qiu
Summary: The power consumption of the compression process in air separation units can be significantly reduced by precooling the inlet air with an organic Rankine cycle and vapor compression cycle (ORC-VCR). This paper presents an experimental assessment of a compression heat recovery system based on ORC-VCR for air separation units. The experimental results demonstrate the effectiveness of the system, with a high cooling capacity and stable operation.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Weiwu Ma, Yanrong Chen, Y. Wang, Chong Yang, Cheng Yang, Chuqing Xiao, Gang Liu
Summary: Highly efficient reservoir development and utilization is essential for the commercial operation of enhanced geothermal systems. This study introduces a new parameter, called unit effective permeable area, to describe the effective development between fractures and reservoir. The optimization parameters obtained in this study were validated and the annual average effective electric power was calculated as 10.06 MW.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Qasir Iqbal, Song Fang, Yao Zhao, Yubo Yao, Zhuoren Xu, Haoran Gan, Hanwei Zhang, Limin Qiu, Christos N. Markides, Kai Wang
Summary: This paper presents a thermo-economic analysis of a cold thermally integrated pumped-thermal electricity storage (TI-PTES) system, which converts electricity into cold energy using a vapor compression refrigeration (VCR) unit and stores it at sub-ambient temperatures. The results reveal that as the temperatures of the two cold storage tanks approach each other, the roundtrip efficiency and levelized cost of storage (LCOS) of the system increase while the electrical energy storage capacity decreases.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Chunwei Zhou, Gang Liu, Shengming Liao
Summary: Successful enhanced geothermal systems depend on fluid flow in fractured reservoir with good fissure connectivity. The study proposes a fuzzy inversion model to explore the location of the predominant flow area. The model achieves good inversion results, reduces dependence on initial guess area and property, and has good anti-interference ability.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Thermodynamics
Xia Zhou, Song Fang, Hanwei Zhang, Zhuoren Xu, Hanying Jiang, Yangyiming Rong, Kai Wang, Xiaoqin Zhi, Limin Qiu
Summary: There is a large amount of waste heat and cooling capacity required in cryogenic air separation units (ASUs). The mechanically coupled organic Rankine-vapor compression (ORVC) system is an attractive technology for heat-driven refrigeration in cryogenic ASUs. Off-design experiments are carried out on a mechanically coupled ORVC test bench to investigate the dynamic response characteristics and system performance variations.
Article
Energy & Fuels
Cheng Peng, Gang Liu, Shengming Liao
Summary: Assessment of geothermal resources is a vital and challenging task in the utilization of geothermal resources. The objective of this study is to estimate the natural thermal water discharge and recoverable thermal water mass flow rates using an express method, and evaluate the geothermal water and energy resources. The results show that the geothermal field should be divided into three sections to calculate hot water resources, and the main controlling fault zones are identified. The total mass flow rates of recoverable thermal water are found to be 49.32 kg/s, with the Reshuiwei section being suitable for comprehensive utilization of underground hot water. The recoverable heat rates reached 15.031 MW, and the reservoir temperature potential of the Reshuiwei geothermal field is estimated to be about 182.95 degrees Celsius. The conclusions drawn from this study would provide a reference for geothermal resources assessment in all geothermal fields.
Article
Green & Sustainable Science & Technology
Weiwu Ma, Chuqing Xiao, Shams Forruque Ahmed, Tao Feng, Gang Liu
Summary: This study presents a three-phase dynamic energy planning framework based on multi-objective optimization, assessment, and analysis. It proposes an optimization phase using NSGA-II to determine the optimal allocation of multiple energy sources, and a comprehensive assessment system combining the G1 method and entropy weight method. The framework is applicable to Guangdong Province and suggests prioritizing offshore wind power, steady development of hydropower and nuclear power, and vigorous development of solar power to achieve carbon neutrality by 2060.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Rong Hu, Jincan Liang, Ting Lan, Yingde Yin, Gang Liu
Summary: In most regions of southern China, condensation frequently occurs on building surfaces during the period from March to April, affecting people's safety and structural properties. This article proposes an innovative anti-condensation floor system based on the reverse Carnot cycle. Simulation studies show that the system effectively keeps the floor dry in Guilin and performs well in representative cities with low air moisture content. It also consumes 42% less energy than cooling dehumidification systems, providing a reference for the feasibility of radiant floor systems in humid climate areas.
Article
Thermodynamics
Weiwu Ma, Chong Yang, Shams Forruque Ahmed, Yanrong Chen, Cheng Yang, Gang Liu
Summary: This study investigates the influence of perforation parameters on fracturing results in the hot dry rock (HDR) environment through a coupled thermal-hydraulic-mechanical model. The results reveal the significance of in-plane perforation spacing on the fracturing efficiency. The findings can be applied to optimize the perforation parameters for fixed-plane fracturing.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Weiwu Ma, Yifan Xu, Shams Forruque Ahmed, Chong Yang, Gang Liu
Summary: This study introduces a novel index, the effective time-averaged volume, to evaluate the effectiveness of reservoirs and fractures in enhanced geothermal systems (EGS). The research finds that reducing the effective time-averaged volume can increase thermal recovery rate and power generation. The optimized parameters of the model include a reservoir permeability of 0.5 mD, a primary fracture permeability of 50 D, an injection flow rate of 45 kg/s, an injection temperature of 20 degrees C, and a well spacing of 200 m. These insights provide valuable guidance for the efficient design, operation, and optimization of EGS.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
