Article
Thermodynamics
Chuanmin Tai, Guansan Tian, Wenjun Lei
Summary: A novel district heating system based on absorption heat exchange and water-heat combined supply is proposed to address the challenges faced by traditional steam extraction cogeneration in nuclear power plants. This system offers improvements in heating and transportation capacity while reducing investment and power consumption.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Pauli Hiltunen, Sanna Syri
Summary: The city of Espoo plans to abandon coal in its district heating system by 2025, replacing it with renewable fuels, heat pumps, and waste heat utilization. This transition will significantly reduce CO2 emissions with a small increase in production costs. Utilizing waste heat can further reduce emissions and prevent an increase in production costs.
Article
Thermodynamics
Miguel Gonzalez-Salazar, Julia Klossek, Pascal Dubucq, Thomas Punde
Summary: Long-term portfolio optimization for district heating systems is challenging due to the need for high accuracy and computational speed. This paper investigates the advantages and disadvantages of using merit order (MO) models compared to mixed integer linear programming (MILP) models. Results suggest that MO models, especially those incorporating heat storage and detailed description of CHP plants, can significantly reduce computation time without sacrificing accuracy. Combining MO and MILP models offers a faster and more robust decision-making process.
Article
Thermodynamics
Yichi Zhang, Par Johansson, Angela Sasic Kalagasidis
Summary: This study evaluates the practical storage potential of district heating networks based on field investigations of Swedish and Chinese networks, and analyzes the relationship between heat density and storage potential. It finds that raising the network temperatures in low-temperature district heating systems to utilize district heating network inertia reduces heat source efficiency, making it infeasible. Additionally, the back-pressure mode is not economically attractive. Overall, the study identifies limited benefits of district heating network inertia and stresses the need for careful consideration in future works.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Jiayang Chen, Wen Zheng, Ying Kong, Xiaolin Yang, Zhaoyang Liu, Jianjun Xia
Summary: This study examines the feasibility of using nuclear energy for heating in the context of increasing urbanization in China, and proposes a CHW system as an alternative heating solution for urban areas, using the Jiaodong Peninsula as a case study. The analysis compares the CHW system with traditional heating schemes and highlights the social, environmental, and economic benefits of the HYNP CHW scheme in the Jiaodong Peninsula.
Article
Thermodynamics
Lin Fu, Yonghong Li, Yanting Wu, Xiaoyin Wang, Yi Jiang
Summary: The study introduces a low carbon district heating system that is suitable for large cities in Northern China, aiming to reduce energy consumption, emissions, and improve the economics of the heating systems.
Article
Thermodynamics
Yubo Lian, Heping Ling, Gan Song, Qingchan Ma, Bin He
Summary: In this paper, a refrigerant-based battery thermal management system (BTMS) is proposed, which can heat and cool the battery pack without auxiliary systems. Experimental results show that compared to a coolant-based BTMS, the proposed system improves battery heating rate and reduces energy consumption.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Gokhan Sevilgen, Muhsin Kilic, Halil Bayram, Enes Basak, Harun Dursun
Summary: This paper investigates the innovative hybrid heat pump system (HHPS) with a Positive Temperature Coefficient (PTC) heater commonly used in electric vehicles (EVs) in different heating modes. The results show that using HHPS can increase the driving range of EVs by up to 15%. It is suggested that a high-capacity PTC heater and heat pump should work together at the beginning of heating, and gradually reduce the PTC capacity at lower ambient conditions. HHPS is a promising solution for achieving the target temperature in less than 300 s at lower ambient conditions in new generation EVs.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
R. Skvorcinskiene, N. Striugas, A. Galinis, V Lekavicius, E. Kurkela, M. Kurkela, R. Lukosevicius, M. Radinas, A. Sermuksniene
Summary: This article proposes a new concept of tri-generation of Fischer-Tropsch products, heat, and power for future energy markets. The feasibility and economic attractiveness of the concept are examined through a techno-economic assessment, providing a new solution to reduce fossil fuel usage and improve the efficiency of district heating systems.
Article
Thermodynamics
Youjun Zhang, Zhihua Ge, Yunxi Yang, Junhong Hao, Lei Xu, Xiaoze Du, Chresten Traeholt
Summary: This research proposes a novel CHP cascade heating system by integrating it with the electric heat pump (EHP), which improves energy utilization efficiency and flexibility, promoting decarbonization and renewable energy integration.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
A. Boldrini, J. P. Jimenez Navarro, W. H. J. Crijns-Graus, M. A. van den Broek
Summary: This study assesses the technical potential of district heating systems (DHs) as a source of flexibility in European electricity markets, finding that DHs have high potential in providing automatic and manual frequency restoration reserves, with significant untapped potential. Sensitivity analysis was conducted on DHs deployment scenarios.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Thermodynamics
Yanmin Wang, Zhiwei Li, Junjie Liu, Yan Zhao, Shengbin Sun
Summary: This study proposes a combined prediction model that improves the accuracy and stability of heat load prediction in district heating systems by combining the results of multiple single models. Experimental results show that the proposed model outperforms previous models in terms of accuracy and stability, providing a theoretical basis for the precise regulation of district heating systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Jing Ye, Danyang Zhao, Lei Zhang, Zhenghua Li, Tao Zhang
Summary: This study establishes an electrothermal coupling scheduling model considering the multi-source ring heating network pipe structure, and proposes a method to simplify a multi-source cyclic heating network topology approximation, effectively simplifying model complexity while retaining thermal dynamic characteristics, thus improving system solving efficiency.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Thermodynamics
Chunhua Sun, Lingyu Yuan, Shanshan Cao, Guoqiang Xia, Yanan Liu, Xiangdong Wu
Summary: This paper proposes an association rule mining-based method to identify supply-demand mismatch from DHS operation data. The proposed method is tested and verified in a typical DHS. The identification results are validated by analyzing the heat substations' operation data.
Article
Thermodynamics
Liang Chen, Jun Cai, Songlin Gu
Summary: A state trajectory tracking method for natural gas, district heating and power systems is proposed in this paper. By combining physical model and measurements, the method utilizes Kalman filter technologies to enhance tracking accuracy.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Review
Green & Sustainable Science & Technology
R. Martinez-Gordon, G. Morales-Espana, J. Sijm, A. P. C. Faaij
Summary: The importance of spatial resolution in energy modeling has been growing, and this paper provides a comprehensive review of the topic, including applications of GIS, analysis of energy modeling tools, and practices for incorporating spatial resolution in energy models.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Multidisciplinary Sciences
Laura Florentina Gusatu, Stefano Menegon, Daniel Depellegrin, Christian Zuidema, Andre Faaij, Claudia Yamu
Summary: The study proposes a comprehensive assessment methodology for understanding the potential impacts of OWF projects on the marine ecosystem in the North Sea basin. Results indicate 2022 as the peak year for cumulative impacts of approved OWFs, with a significant increase in potential impacts from planned 212GWs by 2050. The research highlights the varying degrees of impact in concentrated areas (such as SE UK) and dispersed areas (Germany) over time.
SCIENTIFIC REPORTS
(2021)
Editorial Material
Multidisciplinary Sciences
Yang Ou, Gokul Iyer, Leon Clarke, Jae Edmonds, Allen A. Fawcett, Nathan Hultman, James R. McFarland, Matthew Binsted, Ryna Cui, Claire Fyson, Andreas Geiges, Sofia Gonzales-Zuniga, Matthew J. Gidden, Niklas Hoehne, Louise Jeffery, Takeshi Kuramochi, Jared Lewis, Malte Meinshausen, Zebedee Nicholls, Pralit Patel, Shaun Ragnauth, Joeri Rogelj, Stephanie Waldhoff, Sha Yu, Haewon McJeon
Article
Environmental Studies
Leonardo Nascimento, Takeshi Kuramochi, Gabriela Iacobuta, Michel den Elzen, Hanna Fekete, Marie Weishaupt, Heleen Laura van Soest, Mark Roelfsema, Gustavo De Vivero-Serrano, Swithin Lui, Frederic Hans, Maria Jose de Villafranca Casas, Niklas Hoehne
Summary: Despite an increase in the number and coverage of climate change mitigation policies over the past twenty years, significant policy adoption gaps exist, with half of key policy options not widely adopted. Adoption is particularly low for policies targeting coal and oil phase-outs, energy reductions, industrial emissions reductions, urban planning for retrofits, and renewable energy use in buildings. Policy gaps leave at least one-tenth of G20 emissions uncovered, highlighting the need to improve policy adoption to achieve global net zero greenhouse gas emissions.
Article
Green & Sustainable Science & Technology
Alexander Damkaer Hansen, Takeshi Kuramochi, Birka Wicke
Summary: This study assessed the status and quality of corporate emissions reporting and target setting in the global food system. The findings indicate that there are significant gaps and inconsistencies in emissions reporting, particularly for Scope 3 emissions. The food and beverages industry urgently needs to improve its GHG emissions reporting and management in order to mitigate its impact on climate change.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Michel G. J. den Elzen, Ioannis Dafnomilis, Nicklas Forsell, Panagiotis Fragkos, Kostas Fragkiadakis, Niklas Hohne, Takeshi Kuramochi, Leonardo Nascimento, Mark Roelfsema, Heleen van Soest, Frank Sperling
Summary: This study analyzes the greenhouse gas emissions and macroeconomic impacts of the new NDCs submitted by 156 countries. The results show that while these new NDCs contribute to additional reductions in global emissions by 2030, achieving the climate goals of the Paris Agreement still requires a significant increase in emission reductions.
MITIGATION AND ADAPTATION STRATEGIES FOR GLOBAL CHANGE
(2022)
Article
Environmental Sciences
Leonardo Nascimento, Takeshi Kuramochi, Niklas Hoehne
Summary: This article compares the greenhouse gas emission projections for 2021 to 2030 with those from 2015, finding that the G20's projections for 2030 are almost 15% lower than projected in 2015. This decrease is primarily due to the adoption of new policies, updated expectations on technology and economic growth, as well as the short-term effects of the COVID-19 pandemic. However, despite the improvements, the collective emissions of the G20 are still projected to slightly increase until 2030, falling short of the temperature goals set by the Paris Agreement.
MITIGATION AND ADAPTATION STRATEGIES FOR GLOBAL CHANGE
(2022)
Article
Energy & Fuels
Ahmed Younis, Rene Benders, Jezabel Ramirez, Merlijn de Wolf, Andre Faaij
Summary: The study proposes a combined approach to address the challenges in integrating variable renewable energy sources into the energy system. It enhances the temporal resolution of an energy model and simulates the projected electricity mix using a power model. The results show that combining both methods leads to more accurate assessment of renewable energy penetration and highlights the additional investments and costs required for reliable power system operation.
Article
Energy & Fuels
Andre P. C. Faaij
Summary: Biomass use for energy and materials is a key mitigation option to reach the 1.5 degrees C global temperature target set in the Paris Agreement. However, negative connotations have emerged in certain parts of the EU, particularly regarding displacement effects in markets and land use. Despite this, strong evidence supports the use of sustainable biomass, and there are insights on how to avoid displacement issues. By utilizing better agricultural methods, restoring marginal and degraded lands, and adapting to climate change, biomass can contribute significantly to the future energy and material supply, with potential benefits for overall mitigation and the removal of CO2 from the atmosphere. It is recommended that future policies prioritize the synergy between biomass, energy transition, climate adaptation, agriculture, and land use, as this offers an opportunity to contribute to the European Green Deal and improve energy security.
Article
Environmental Sciences
Mark Roelfsema, Heleen L. van Soest, Michel den Elzen, Heleen de Coninck, Takeshi Kuramochi, Mathijs Harmsen, Ioannis Dafnomilis, Niklas Hohne, Detlef P. van Vuuren
Summary: The framework presented in this study aims to provide transparency and understanding of climate policy in integrated assessment models. It categorizes policy aims and implementation at different stages, and can be used to link international and national-level climate policy scenarios. The framework's application is demonstrated in the IMAGE model.
ENVIRONMENTAL SCIENCE & POLICY
(2022)
Article
Thermodynamics
Longquan Li, Purushothaman Vellayani Aravind, Theo Woudstra, Machteld van den Broek
Summary: Proper thermal management can improve the efficiency of hydrogen storage chains based on liquid organic hydrogen carriers (LOHC). Various strategies for heat integration are designed to enhance the energy efficiency of LOHC chains, with dibenzyltoluene (DBT) identified as the most favorable LOHC pair for waste heat recovery (WHR). The WHR strategies significantly improve the energy efficiency of LOHC chains, making them more efficient than traditional compressed or liquid hydrogen chains in certain scenarios.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Kathelijne Bouw, Carina J. J. Wiekens, Casper Tigchelaar, Andre Faaij
Summary: Participatory energy planning at the local level can increase citizen engagement, establish legitimacy and trust, and promote successful implementation of renewable energies. This research contributes to the current literature by providing concrete examples and verified approaches to clarify the guiding principles of participatory energy planning and address the opportunities and challenges involved. The paper presents a process design that includes multiple tools for collecting social input, such as surveys, questionnaires, and workshops, to facilitate participatory technology choices. The design is applied and tested in a case study of a Dutch neighborhood, and the lessons learned serve as a basis for further research.
Article
Energy & Fuels
Rogier Hans Wuijts, Marjan van den Akker, Machteld van den Broek
Summary: In power system studies, the unit commitment problem is solved to support market decisions and assess system adequacy. The impacts of simplifications on solution quality and computation time were thoroughly investigated, revealing that some simplifications led to significant quality loss without reducing computation time. However, the linear relaxation approach resulted in less quality loss with a significant speed-up, and no difference when unserved energy was minimized. Both the average and maximum capacity factor difference were found to be large for all model variants.
ENERGY SYSTEMS-OPTIMIZATION MODELING SIMULATION AND ECONOMIC ASPECTS
(2023)
Article
Public Administration
Leonardo Nascimento, Michel den Elzen, Takeshi Kuramochi, Santiago Woollands, Ioannis Dafnomilis, Mia Moisio, Mark Roelfsema, Nicklas Forsell, Zuelclady Araujo Gutierrez
Summary: The study found that some countries submitted more ambitious, updated NDCs without implementing sufficient policies to meet their original targets. In most countries, updated NDCs led to higher emissions than current policies. These patterns are influenced by national constraints and reliance on fossil fuels.
JOURNAL OF COMPARATIVE POLICY ANALYSIS
(2023)
Article
Green & Sustainable Science & Technology
Annika Boldrini, Derck Koolen, Wina Crijns-Graus, Ernst Worrell, Machteld van den Broek
Summary: The decarbonisation efforts in the iron and steel industry will lead to a significant increase in electricity consumption, especially with the increased electrification and the switch to hydrogen as iron reductant. This study focuses on the potential demand response strategies for new lowcarbon technologies and finds that hydrogen-based direct reduction of iron with electric arc furnace technology has a much higher potential for electricity cost savings compared to retrofitting blast furnace basic oxygen furnace technology with carbon capture.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2024)
Article
Energy & Fuels
Shitong Fang, Houfan Du, Tao Yan, Keyu Chen, Zhiyuan Li, Xiaoqing Ma, Zhihui Lai, Shengxi Zhou
Summary: This paper proposes a new type of nonlinear VIV energy harvester (ANVEH) that compensates for the decrease in peak energy output at low wind speeds by introducing an auxiliary structure. Theoretical and experimental results show that ANVEH performs better than traditional nonlinear VIV energy harvesters under various system parameter variations.
Article
Energy & Fuels
Wei Jiang, Shuo Zhang, Teng Wang, Yufei Zhang, Aimin Sha, Jingjing Xiao, Dongdong Yuan
Summary: A standardized method was developed to evaluate the availability of solar energy resources in road areas, which combined the Analytic Hierarchy Process (AHP) and the Geographic Information System (GIS). By analyzing critical factors and using a multi-indicator evaluation method, the method accurately evaluated the utilization of solar energy resources and guided the optimal location selection for road photovoltaic (PV) projects. The results provided guidance for the application of road PV projects and site selection for route corridors worldwide, promoting the integration of transportation and energy.
Article
Energy & Fuels
Chang Liu, Jacob A. Wrubel, Elliot Padgett, Guido Bender
Summary: The study investigates the effects of coating defects on the performance of the anode porous transport layer (PTL) in water electrolyzers. The results show that an increasing fraction of uncoated regions on the PTL leads to decreased cell performance, with continuous uncoated regions having a more severe impact compared to multiple thin uncoated strips.
Article
Energy & Fuels
Marcos Tostado-Veliz, Xiaolong Jin, Rohit Bhakar, Francisco Jurado
Summary: In this paper, a coordinated charging price mechanism for clusters of parking lots is proposed. The research shows that enabling vehicle-to-grid characteristics can bring significant economic benefits for users and the cluster coordinator, and vehicle-to-grid impacts noticeably on the risk-averse character of the uncertainty-aware strategies. The developed pricing mechanism can reduce the cost for users, avoiding to directly translate the energy cost to charging points.
Article
Energy & Fuels
Duan Kang
Summary: Building an energy superpower is a key strategy for China and a long-term goal for other countries. This study proposes an evaluation system and index for measuring energy superpower, and finds that China has significantly improved its ranking over the past 21 years, surpassing other countries.
Article
Energy & Fuels
Fucheng Deng, Yifei Wang, Xiaosen Li, Gang Li, Yi Wang, Bin Huang
Summary: This study investigated the synergistic blockage mechanism of sand and hydrate in gravel filling layer and the evolution of permeability in the layer. Experimental models and modified permeability models were established to analyze the effects of sand particles and hydrate formation on permeability. The study provided valuable insights for the safe and efficient exploitation of hydrate reservoirs.
Article
Energy & Fuels
Hao Wang, Xiwen Chen, Natan Vital, Edward Duffy, Abolfazl Razi
Summary: This study proposes a HVAC energy optimization model based on deep reinforcement learning algorithm. It achieves 37% energy savings and ensures thermal comfort for open office buildings. The model has a low complexity, uses a few controllable factors, and has a short training time with good generalizability.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Energy & Fuels
Tianshu Dong, Xiudong Duan, Yuanyuan Huang, Danji Huang, Yingdong Luo, Ziyu Liu, Xiaomeng Ai, Jiakun Fang, Chaolong Song
Summary: Electrochemical water splitting is crucial for hydrogen production, and improving the hydrogen separation rate from the electrode is essential for enhancing water electrolyzer performance. However, issues such as air bubble adhesion to the electrode plate hinder the process. Therefore, a methodology to investigate the two-phase flow within the electrolyzer is in high demand. This study proposes using a microfluidic system as a simulator for the electrolyzer and optimizing the two-phase flow by manipulating the micro-structure of the flow.
Article
Energy & Fuels
Shuo Han, Yifan Yuan, Mengjiao He, Ziwen Zhao, Beibei Xu, Diyi Chen, Jakub Jurasz
Summary: Giving full play to the flexibility of hydropower and integrating more variable renewable energy is of great significance for accelerating the transformation of China's power energy system. This study proposes a novel day-ahead scheduling model that considers the flexibility limited by irregular vibration zones (VZs) and the probability of flexibility shortage in a hydropower-variable renewable energy hybrid generation system. The model is applied to a real hydropower station and effectively improves the flexibility supply capacity of hydropower, especially during heavy load demand in flood season.
Article
Energy & Fuels
Zhen Wang, Kangqi Fan, Shizhong Zhao, Shuxin Wu, Xuan Zhang, Kangjia Zhai, Zhiqi Li, Hua He
Summary: This study developed a high-performance rotary energy harvester (AI-REH) inspired by archery, which efficiently accumulates and releases ultralow-frequency vibration energy. By utilizing a magnetic coupling strategy and an accumulator spring, the AI-REH achieves significantly accelerated rotor speeds and enhanced electric outputs.
Article
Energy & Fuels
Yi Yang, Qianyi Xing, Kang Wang, Caihong Li, Jianzhou Wang, Xiaojia Huang
Summary: In this study, a novel hybrid Quantile Regression (QR) model is proposed for Probabilistic Load Forecasting (PLF). The model integrates causal dilated convolution, residual connection, and Bidirectional Long Short-Term Memory (BiLSTM) for multi-scale feature extraction. In addition, a Combined Probabilistic Load Forecasting System (CPLFS) is proposed to overcome the inherent flaws of relying on a single model. Simulation results show that the hybrid QR outperforms traditional models and CPLFS exceeds the best benchmarks in terms of prediction accuracy and stability.
Article
Energy & Fuels
Wen-Jiang Zou, Young-Bae Kim, Seunghun Jung
Summary: This paper proposes a dynamic prediction model for capacity fade in vanadium redox flow batteries (VRFBs). The model accurately predicts changes in electrolyte volume and capacity fade, enhancing the competitiveness of VRFBs in energy storage applications.
Article
Energy & Fuels
Yuechao Ma, Shengtie Wang, Guangchen Liu, Guizhen Tian, Jianwei Zhang, Ruiming Liu
Summary: This paper focuses on the balance of state of charge (SOC) among multiple battery energy storage units (MBESUs) and bus voltage balance in an islanded bipolar DC microgrid. A SOC automatic balancing strategy is proposed considering the energy flow relationship and utilizing the adaptive virtual resistance algorithm. The simulation results demonstrate the effectiveness of the proposed strategy in achieving SOC balancing and decreasing bus voltage unbalance.
Article
Energy & Fuels
Raad Z. Homod, Basil Sh. Munahi, Hayder Ibrahim Mohammed, Musatafa Abbas Abbood Albadr, Aissa Abderrahmane, Jasim M. Mahdi, Mohamed Bechir Ben Hamida, Bilal Naji Alhasnawi, A. S. Albahri, Hussein Togun, Umar F. Alqsair, Zaher Mundher Yaseen
Summary: In this study, the control problem of the multiple-boiler system (MBS) is formulated as a dynamic Markov decision process and a deep clustering reinforcement learning approach is applied to obtain the optimal control policy. The proposed strategy, based on bang-bang action, shows superior response and achieves more than 32% energy saving compared to conventional fixed parameter controllers under dynamic indoor/outdoor actual conditions.
