Article
Ecology
Jie Yang, Yijing Huang, Kenji Takeuchi
Summary: This study estimates the impact of the 2009/2010 drought in southwestern China on industrial outcomes and CO2 emissions. The findings suggest that severe drought reduces hydropower production and economic output of energy-intensive sectors, while increasing power production of thermal power firms, leading to increased net CO2 emissions in the region.
ECOLOGICAL ECONOMICS
(2022)
Article
Green & Sustainable Science & Technology
Chuyin Tian, Guohe Huang, Yulei Xie
Summary: This study developed a two-stage fuzzy-stochastic chance-constrained interval (TFCI) regional energy system optimization model to assess the rationality of existing hydropower exploitation plan in Sichuan, China. The results indicated the necessity to limit the expansion of hydropower installed capacity in order to improve the utilization efficiency of all renewable technologies.
Article
Engineering, Electrical & Electronic
Yuhang Ma, Yuan Huang, Gang Wu, Junyong Liu, Yang Liu, Yue Xiang, Youbo Liu, Zao Tang
Summary: This study presents a decentralized monthly generation scheduling model of cascade hydropower plants in multiple time scale markets. By introducing decoupling methods and designing flow-based bilateral contracts, it addresses issues of information privacy and profit distribution, while protecting information privacy and increasing total revenues of the cascade hydropower system.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Article
Engineering, Environmental
Yuanyuan Zhang, Youheng Su, Zhe Li, Shuhui Guo, Lunhui Lu, Bin Zhang, Yu Qin
Summary: This study explores the impact of reservoir operation on particulate organic carbon (POC) and methane (CH4) in cascade hydroelectric reservoirs. The results show that reservoir operation significantly affects the transport of POC and accumulation of CH4, where mineral POC is more likely to drive CH4 accumulation.
Article
Environmental Sciences
Wei Wu, Jiawei Wang, Xiaode Zhou, Bo Yuan, Mengjing Guo, Lei Ren
Summary: The study on cascade reservoirs in the Lancang River (Yunnan section) reveals that the development and operation of these reservoirs have made it a significant area for N2O emissions, with concentrations varying by season and influenced by factors such as water temperature and dissolved oxygen levels.
RIVER RESEARCH AND APPLICATIONS
(2021)
Article
Green & Sustainable Science & Technology
Zhou Fang, Shengli Liao, Chuntian Cheng, Hongye Zhao, Benxi Liu, Huaying Su
Summary: This paper proposes a parallel improved dynamic programming with successive approximation (PIDPSA) method for medium-term optimal scheduling of hydropower plants in China. The method improves the solution quality by considering more hydraulic connections and reducing unnecessary calculations, and it greatly shortens the solution time through fine-grained parallelism. The results show that PIDPSA can obtain higher quality solutions and provides high efficiency and practical value for solving MOSHPP problems.
Review
Environmental Sciences
Yuanan Hu, Hefa Cheng, Shu Tao
Summary: China has prioritized harnessing geothermal resources for renewable energy development, with little progress in geothermal power generation but rapid growth in geothermal direct use. Key barriers for geothermal energy utilization include the lack of high temperature hydrothermal resources for power generation and technological challenges. Significant investment in research and favorable policies are recommended to accelerate the growth of geothermal energy market.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Environmental Sciences
Sai-Nan Chen, Fu-Jun Yue, Xiao-Long Liu, Jun Zhong, Yuan-Bi Yi, Wan-Fa Wang, Yulin Qi, Hua-Yun Xiao, Si-Liang Li
Summary: The study in a karst watershed in southwest China showed that nitrogen concentration was higher in summer in the cascade reservoir system, with nitrification being the dominant conversion process in the water system. Fertilizer application significantly influenced nitrate concentration in the karst cascade reservoirs.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biodiversity Conservation
Rui Wu, Lvrong Zhou, Hua Qu, Zai-Wei Ge
Summary: Four new Scleroderma species, S. erubescens, S. separatum, S. squamulosum, and S. vinaceum, were described from Yunnan, southwestern China based on morphological and molecular data. Images of fresh basidiomata and scanning electron microscope (SEM) images of basidiospores were provided. Phylogenetic analyses using ITS sequences revealed that these four new taxa belong to Scleroderma section Scleroderma.
Article
Green & Sustainable Science & Technology
Zizhao Wang, Feng Wu, Yang Li, Linjun Shi, Kwang Y. Lee, Jiawei Wu
Summary: This paper addresses the challenges in precisely tracking the submitted generation plan of the cascade hydropower-photovoltaic (CHP-PV) complementary system due to the randomness and variability of PV power output, which may deteriorate the safety and stability of the receiving-end power grid. A multi-time scale dispatch framework with day-ahead and intra-day dispatch is established to address PV uncertainties. Simulation results demonstrate that real-time random PV fluctuations could be compensated by adjusting CHPs, and the target water level of cascade reservoirs can be tracked under the proposed approach.
Article
Green & Sustainable Science & Technology
Liwen Liu, Yaling Zhang, Lu Zhao, Cun Zhan, Chuan Liang
Summary: The green construction of large-scale hydropower projects is crucial for resource conservation and environmental protection. This study constructed an evaluation indicator system to objectively assess the green construction level, and evaluated the Wudongde Hydropower Station as an example. The evaluation results indicated a good level of green construction, but highlighted the need to strengthen aspects such as waste treatment, land use, publicity and training, soil erosion control, and water resource conservation.
Article
Environmental Sciences
Yang Liu, Wenzhe Tang, Colin F. Duffield, Felix Kin Peng Hui, Lihai Zhang, Xuteng Zhang, Yanling Kang
Summary: This study systematically examined the causal relationships among partnering, design management, design capability, and EPC hydropower project performance by establishing and validating a conceptual model. Path analysis revealed that partnering can directly promote design management and design capability, ultimately leading to better hydropower project outcomes. The study's contribution lies in theoretically linking intra- and inter-organizational design-related activities and providing practical strategies for participants to optimize their resources in designs for superior project performance.
Article
Thermodynamics
Juntao Zhang, Chuntian Cheng, Shen Yu, Jianjian Shen, Xinyu Wu, Huaying Su
Summary: This paper evaluates the feasibility of transforming cascade hydropower stations into a large-scale hydropower energy storage system to improve the utilization efficiency of hydropower. The simulation results show that this system can effectively reduce energy loss, store excess electricity, and achieve price arbitrage during periods of price differences. However, it is economically viable only when the efficiency of the pumping station is above 55%.
Article
Geography, Physical
An-feng Chen, Yang Zhang, Dong-xun Yuan, Hui-ting Wu, Jing Dou, Jing-qi Liu
Summary: This study presents an integrated conodont succession from the Bozhou section, northern Guizhou Province, southwestern China, identifying 22 conodont species and establishing the ages of members in the Yelang Formation for the first time. The conodont successions at Bozhou can be well correlated with other sections worldwide, providing valuable insights into the Permian-Triassic boundary and the Induan-Olenekian boundary.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Environmental Sciences
Yaru Qian, Yunxu Shang, Yixin Zheng, Yuqiao Jia, Feifei Wang
Summary: Freshwater rivers are crucial for providing drinking water sources and connecting oceans and lands. However, they can also serve as pathways for environmental pollutants, including microplastics, to contaminate drinking water. This study investigated the temporal and spatial variation of microplastics in a section of the Yellow River in China and found higher abundances in the wet season compared to the dry season. The predominant types of microplastics were influenced by regional precipitation, fishing activities, and improper disposal of plastic waste. The study highlighted the potential long-term threat of microplastics to drinking water safety and provided valuable information for evaluating the environmental impacts of degradable plastics.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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.