Article
Environmental Sciences
Xiaolin Wu, Wenbin Liu, Hanfei Gao, David Alfaro, Shurui Sun, Rongrong Lei, Tianqi Jia, Minghui Zheng
Summary: Coal-fired power plants are significant sources of PAH emissions, with different air pollution control devices showing varying effects on PAH emissions. WESPs and LLT-ESPs were found to be effective in reducing PAH emissions, offering potential for adoption in other plants for PAH reduction.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Yali Tong, Kun Wang, Jiajia Gao, Tao Yue, Penglai Zuo, Chenlong Wang, Li Tong, Xiaoxi Zhang, Yun Zhang, Quanming Liang, Jieyu Liu
Summary: Coal-fired industrial boilers are a significant source of mercury emissions. This study assessed the mercury flow of these boilers in China, and established an inventory of mercury output from waste products. The findings showed that smaller boilers were the dominant source of mercury, and regions in North China, Northeast China, and Northwest China had high atmospheric mercury emissions.
AIR QUALITY ATMOSPHERE AND HEALTH
(2022)
Article
Environmental Sciences
Jiajia Gao, Kun Wang, Yali Tong, Tao Yue, Chenlong Wang, Penglai Zuo, Jieyu Liu
Summary: Coal-fired industrial boilers are a significant source of trace metals emissions in China. A high-resolution emission inventory for Hg, As, Cd, Cr, and Pb in 2017 was established based on data from over 61,000 CFIBs. The study found that emissions were concentrated in northern and eastern regions, with seasonal variations and an overall decrease in emissions due to control measures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Kun Wang, Yali Tong, Tao Yue, Jiajia Gao, Chenlong Wang, Penglai Zuo, Jieyu Liu
Summary: From 2015 to 2017, China implemented strong air pollution control measures for coal-fired industrial boilers, including elimination, promoting clean fuels, and updating air pollution control devices. Updating air pollution control devices was identified as the major measure to reduce air pollutants, accounting for more than 35% of emission reductions and mitigated concentration.
ENVIRONMENTAL POLLUTION
(2021)
Article
Green & Sustainable Science & Technology
Ke Cheng, Xinyue Zhou, Yan Wang, Jingyu Li, Shangguan Yu, Huanjia Liu, Jishao Jiang, Peng Yi
Summary: Coal burning is a major anthropogenic source of air pollutants, and coal-fired industrial boilers are a significant challenge for China's carbon peaking and carbon neutrality policies. This study establishes an emission inventory and uses models to analyze the emissions of air pollutants and greenhouse gases from coal-fired industrial boilers. The driving forces behind emission trends are quantified, and future emission projections are made. The results show that policy adjustments have a significant impact on pollutant emissions, and control technology is a key factor in reducing emissions.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Thermodynamics
Chun Lou, Yang Pu, Yonggang Zhao, Yang Bai, Bin Yao, Dunxi Yu
Summary: Measurement of time-resolved alkali metals release is crucial to mitigate the problems caused by alkali metals during coal combustion. The Flame Emission Spectroscopy (FES) method proposed in this paper can accurately measure the release of sodium (Na) and distinguish different stages of release.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Review
Energy & Fuels
Pieter Rousseau, Ryno Laubscher, Brad Travis Rawlins
Summary: Integrated whole-boiler process models are useful in boiler design and analysis of different scenarios. One-dimensional thermofluid network models are necessary for analyzing the overall performance. This review paper aims to provide a summary of recent literature on boiler modeling, describe the thermofluid network modeling methodology, and demonstrate its application in case studies.
Article
Energy & Fuels
Simon Koumi Ngoh, Samuel Epesse Misse, Inoussah Moungnutou Mfetoum
Summary: This study shows that switching fuel from heavy fuel oil to natural gas in industrial boilers can have significant environmental and economic impacts, reducing greenhouse gas emissions and improving boiler thermal efficiency.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Thermodynamics
Li Gao, Ruonan Li, Yingdan Mei, Xiaoli Zhao
Summary: This study measures the technical efficiency of coal-fired power enterprises in a large Chinese power generation group from 2010 to 2015 using stochastic frontier analysis. The study provides a detailed analysis of technical efficiency in terms of return to scale, operation hours, and regional characteristics. The findings suggest that there is room for improvement in the technical efficiency of coal-fired power enterprises, and the impact of return to scale, operation hours, and regional characteristics varies. Reducing coal consumption and increasing equity are important ways to improve technical efficiency.
Article
Engineering, Multidisciplinary
Hariana, Prabowo, Edi Hilmawan, Fairuz Milky Kuswa, Arif Darmawan, Muhammad Aziz
Summary: This paper comprehensively investigates the combustion performances and slagging and fouling behaviors during cofiring biomass and coal. The results show that cofiring coal with 25% biomass has the best combustion performance.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Zhixiang Zhu, Xinwei Guo, Hao Bai, Zhongxiao Zhang, Juan Yu, Xiaojiang Wu, Zixiang Li, Jian Liu, Qichao Zhang
Summary: This study conducted industrial-scale trials to investigate the reduction of NOx by injecting ammonia solution into the fuel-rich zone of a coal-fired boiler. The results showed that the distribution mode of secondary air and the ratio of secondary overfire air (SOFA) had significant impacts on the reduction performance. The configuration of ammonia solution injectors also played a crucial role in the reduction of NOx emissions.
Article
Environmental Sciences
Jingfan Zheng, Jing Wang, Fengling Yang, Zhiping Du, Fangqin Cheng
Summary: Selective non-catalytic reduction (SNCR) with NH3 as the reducing agent is commonly used for denitrification in coal-fired boilers. In this study, the mechanisms of NH3 adsorption and reactions on coal ash were investigated. The adsorption capacity of lignite ash was higher than that of anthracite ash due to its larger specific surface area and surface acidity. At temperatures between 450-850 degrees C, coal ash exhibited catalytic activity for NH3 decomposition and oxidation. NH3 adsorbed over acid sites on coal ash and underwent hydrogen abstraction to produce intermediates, which then reacted with the surface lattice oxygen of coal ash to produce NO and N2O.
Article
Environmental Sciences
Jiajia Gao, Kun Wang, Kaiyun Liu, Yali Tong, Jieyu Liu, Yun Zhang, Tao Yue
Summary: Coal preparation significantly reduces atmospheric emissions of toxic trace elements (TEs) in Chinese coal-fired industrial boilers (CFIBs) and decreases their environmental risks. Heilongjiang, Liaoning, and Inner Mongolia are the top contributors to TE emissions. The utilization of coal preparation products and byproducts lowers TE contents in waste materials.
AIR QUALITY ATMOSPHERE AND HEALTH
(2023)
Article
Green & Sustainable Science & Technology
V. A. Kuznetsov, A. V. Minakov, D. M. Bozheeva, A. A. Dekterev
Summary: Numerical studies were conducted on oxy-fuel combustion of pulverized coal in an industrial boiler BKZ 500-140-1. A comprehensive mathematical model was tested based on experimental data from a smaller scale laboratory stand, and good agreement with the experimental results was observed. The effect of operating modes on physical and chemical processes and harmful emissions was analyzed, as well as the impact of oxygen concentration and CO2/H2O ratio on the combustion process.
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2023)
Article
Thermodynamics
Xiaoqiang Wen, Kaichuang Li, Jianguo Wang
Summary: In this paper, new ensemble learning methods are proposed to predict NOx concentration at the SCR inlet in coal-fired boilers. Three kinds of single models are constructed as base learners, and their model structures and parameters are optimized. The presented ensemble models have excellent prediction accuracy and generalization, as verified by experimental results using a different dataset.
Article
Thermodynamics
Qi Zhang, Henan Yi, Zaihai Yu, Jintong Gao, Xiaozhuang Wang, Heyong Li, Bo Shen
APPLIED THERMAL ENGINEERING
(2018)
Article
Energy & Fuels
Yue-Jun Zhang, Ting Liang, Yan-Lin Jin, Bo Shen
Article
Green & Sustainable Science & Technology
Haoming Liu, Shuxian Deng, Salman Habib, Bo Shen
Summary: With the increasing demand for refrigeration, the electricity consumed in the refrigeration field is also growing, leading to environmental challenges. This study examines emission reduction-oriented configuration schemes in the refrigeration field using Ningbo, China as a case study. The research shows that proper configuration of distributed photovoltaic and energy storage devices can effectively reduce costs and emissions in the refrigeration field.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Multidisciplinary Sciences
Jing-Li Fan, Zezheng Li, Xi Huang, Kai Li, Xian Zhang, Xi Lu, Jianzhong Wu, Klaus Hubacek, Bo Shen
Summary: Decarbonized power systems are crucial for addressing climate change. This study develops a simulation model to explore the optimal solution for a reliable and resilient near-zero power system using carbon capture, utilization, and storage. The findings suggest that allowing up to 20% of abated fossil fuel power generation could significantly reduce the power shortage rate in China by 2050 and increase system resilience.
NATURE COMMUNICATIONS
(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.