Frontiers in Energy最新文献_第9页

Highlights of mainstream solar cell efficiencies in 2022 2022年主流太阳能电池效率的亮点

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-02-28 DOI: 10.1007/s11708-023-0871-y

Wenzhong Shen, Yixin Zhao, Feng Liu

引用次数: 3

Reduction potential of the energy penalty for CO2 capture in CCS 碳捕集与封存技术中二氧化碳捕获能量损失的减少潜力

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-02-28 DOI: 10.1007/s11708-023-0864-x

Yawen Zheng, Lin Gao, Song He, Hongguang Jin

引用次数: 0

Liquid-based high-temperature receiver technologies for next-generation concentrating solar power: A review of challenges and potential solutions 下一代聚光太阳能的液体高温接收器技术:挑战和潜在解决方案综述

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-02-28 DOI: 10.1007/s11708-023-0866-8

Ya-Ling He, Wenqi Wang, Rui Jiang, Mingjia Li, Wenquan Tao

{"title":"Liquid-based high-temperature receiver technologies for next-generation concentrating solar power: A review of challenges and potential solutions","authors":"Ya-Ling He, Wenqi Wang, Rui Jiang, Mingjia Li, Wenquan Tao","doi":"10.1007/s11708-023-0866-8","DOIUrl":"10.1007/s11708-023-0866-8","url":null,"abstract":"<div><p>To reduce the levelized cost of energy for concentrating solar power (CSP), the outlet temperature of the solar receiver needs to be higher than 700 °C in the next-generation CSP. Because of extensive engineering application experience, the liquid-based receiver is an attractive receiver technology for the next-generation CSP. This review is focused on four of the most promising liquid-based receivers, including chloride salts, sodium, lead-bismuth, and tin receivers. The challenges of these receivers and corresponding solutions are comprehensively reviewed and classified. It is concluded that combining salt purification and anti-corrosion receiver materials is promising to tackle the corrosion problems of chloride salts at high temperatures. In addition, reducing energy losses of the receiver from sources and during propagation is the most effective way to improve the receiver efficiency. Moreover, resolving the sodium fire risk and material compatibility issues could promote the potential application of liquid-metal receivers. Furthermore, using multiple heat transfer fluids in one system is also a promising way for the next-generation CSP. For example, the liquid sodium is used as the heat transfer fluid while the molten chloride salt is used as the storage medium. In the end, suggestions for future studies are proposed to bridge the research gaps for > 700 °C liquid-based receivers.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"17 1","pages":"16 - 42"},"PeriodicalIF":2.9,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5078451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A systemic review of hydrogen supply chain in energy transition 能源转型中的氢供应链系统回顾

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-02-28 DOI: 10.1007/s11708-023-0861-0

Haoming Ma, Zhe Sun, Zhenqian Xue, Chi Zhang, Zhangxing Chen

{"title":"A systemic review of hydrogen supply chain in energy transition","authors":"Haoming Ma, Zhe Sun, Zhenqian Xue, Chi Zhang, Zhangxing Chen","doi":"10.1007/s11708-023-0861-0","DOIUrl":"10.1007/s11708-023-0861-0","url":null,"abstract":"<div><p>Targeting the net-zero emission (NZE) by 2050, the hydrogen industry is drastically developing in recent years. However, the technologies of hydrogen upstream production, midstream transportation and storage, and downstream utilization are facing obstacles. In this paper, the development of hydrogen industry from the production, transportation and storage, and sustainable economic development perspectives were reviewed. The current challenges and future outlooks were summarized consequently. In the upstream, blue hydrogen is dominating the current hydrogen supply, and an implementation of carbon capture and sequestration (CCS) can raise its cost by 30%. To achieve an economic feasibility, green hydrogen needs to reduce its cost by 75% to approximately 2 $/kg at the large scale. The research progress in the midterm sector is still in a preliminary stage, where experimental and theoretical investigations need to be conducted in addressing the impact of embrittlement, contamination, and flammability so that they could provide a solid support for material selection and large-scale feasibility studies. In the downstream utilization, blue hydrogen will be used in producing value-added chemicals in the short-term. Over the long-term, green hydrogen will dominate the market owing to its high energy intensity and zero carbon intensity which provides a promising option for energy storage. Technologies in the hydrogen industry require a comprehensive understanding of their economic and environmental benefits over the whole life cycle in supporting operators and policymakers.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"17 1","pages":"102 - 122"},"PeriodicalIF":2.9,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5081692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

China’s policy framework for carbon capture, utilization and storage: Review, analysis, and outlook 中国碳捕集、利用与封存政策框架:回顾、分析与展望

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-02-28 DOI: 10.1007/s11708-023-0862-z

Qiao Ma, Shan Wang, Yan Fu, Wenlong Zhou, Mingwei Shi, Xueting Peng, Haodong Lv, Weichen Zhao, Xian Zhang

{"title":"China’s policy framework for carbon capture, utilization and storage: Review, analysis, and outlook","authors":"Qiao Ma, Shan Wang, Yan Fu, Wenlong Zhou, Mingwei Shi, Xueting Peng, Haodong Lv, Weichen Zhao, Xian Zhang","doi":"10.1007/s11708-023-0862-z","DOIUrl":"10.1007/s11708-023-0862-z","url":null,"abstract":"<div><p>Carbon capture, utilization, and storage (CCUS) is estimated to contribute substantial CO<sub>2</sub> emission reduction to carbon neutrality in China. There is yet a large gap between such enormous demand and the current capacity, and thus a sound enabling environment with sufficient policy support is imperative for CCUS development. This study reviewed 59 CCUS-related policy documents issued by the Chinese government as of July 2022, and found that a supporting policy framework for CCUS is taking embryonic form in China. More than ten departments of the central government have involved CCUS in their policies, of which the State Council, the National Development and Reform Commission (NDRC), the Ministry of Science and Technology (MOST), and the Ministry of Ecological Environment (MEE) have given the greatest attention with different focuses. Specific policy terms are further analyzed following the method of content analysis and categorized into supply-, environment- and demand-type policies. The results indicate that supply-type policies are unbalanced in policy objectives, as policy terms on technology research and demonstration greatly outnumber those on other objectives, and the attention to weak links and industrial sectors is far from sufficient. Environment-type policies, especially legislations, standards, and incentives, are inadequate in pertinence and operability. Demand-type policies are absent in the current policy system but is essential to drive the demand for the CCUS technology in domestic and foreign markets. To meet the reduction demand of China’s carbon neutral goal, policies need to be tailored according to needs of each specific technology and implemented in an orderly manner with well-balanced use on multiple objectives.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"17 3","pages":"400 - 411"},"PeriodicalIF":2.9,"publicationDate":"2023-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5075987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Approaching the commercial threshold of solar water splitting toward hydrogen by III-nitrides nanowires 利用 III-氮化物纳米线接近太阳能水分离制氢的商业门槛

IF 3.1 4区工程技术

Frontiers in Energy Pub Date : 2023-02-20 DOI: 10.1007/s11708-023-0870-z

Baowen Zhou, Shuhui Sun

引用次数: 0

Engineering Fronts in fields of Energy and Electrical Science and Technologies in the report of Engineering Fronts 2022 《工程前沿2022》报告中能源与电气科学与技术领域的工程前沿

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-02-15 DOI: 10.1007/s11708-023-0868-6

Yonglin Ju, Ruiqin Liu, Lingxiao Fu

引用次数: 0

The most influential “Top 10 Events” in carbon neutrality and climate change in 2022 2022年碳中和和气候变化领域最具影响力的“十大事件”

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-02-13 DOI: 10.1007/s11708-023-0869-5

Research Institute of Carbon Neutrality of Shanghai Jiao Tong University

引用次数: 0

A methodology for regulating fuel stratification and improving fuel economy of GCI mode via double main-injection strategy 采用双主喷射策略调节燃油分层和提高GCI模式燃油经济性的方法

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2023-01-10 DOI: 10.1007/s11708-022-0859-z

Haoqing Wu, Yaoyuan Zhang, Shijie Mi, Wenbin Zhao, Zhuoyao He, Yong Qian, Xingcai Lu

{"title":"A methodology for regulating fuel stratification and improving fuel economy of GCI mode via double main-injection strategy","authors":"Haoqing Wu, Yaoyuan Zhang, Shijie Mi, Wenbin Zhao, Zhuoyao He, Yong Qian, Xingcai Lu","doi":"10.1007/s11708-022-0859-z","DOIUrl":"10.1007/s11708-022-0859-z","url":null,"abstract":"<div><p>Gasoline compression ignition (GCI) combustion faces problems such as high maximum pressure rise rate (MPRR) and combustion deterioration at high loads. This paper aims to improve the engine performance of the GCI mode by regulating concentration stratification and promoting fuel-gas mixing by utilizing the double main-injection (DMI) strategy. Two direct injectors simultaneously injected gasoline with an octane number of 82.7 to investigate the energy ratio between the two main-injection and exhaust gas recirculation (EGR) on combustion and emissions. High-load experiments were conducted using the DMI strategy and compared with the single main-injection (SMI) strategy and conventional diesel combustion. The results indicate that the DMI strategy have a great potential to reduce the MPRR and improve the fuel economy of the GCI mode. At a 10 bar indicated mean effective pressure, increasing the main-injection-2 ratio (<i>R</i><sub>m−2</sub>) shortens the injection duration and increases the mean mixing time. Optimized <i>R</i><sub>m</sub><sub>−2</sub> could moderate the trade-off between the MPRR and the indicated specific fuel consumption with both reductions. An appropriate EGR should be adopted considering combustion and emissions. The DMI strategy achieves a highly efficient and stable combustion at high loads, with an indicated thermal efficiency (ITE) greater than 48%, CO and THC emissions at low levels, and MPRR within a reasonable range. Compared with the SMI strategy, the maximum improvement of the ITE is 1.5%, and the maximum reduction of MPRR is 1.5 bar/°CA.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"17 5","pages":"678 - 691"},"PeriodicalIF":2.9,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88660794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Experimental study of stratified lean burn characteristics on a dual injection gasoline engine 双喷汽油机分层稀薄燃烧特性试验研究

IF 2.9 4区工程技术

Frontiers in Energy Pub Date : 2022-12-31 DOI: 10.1007/s11708-021-0812-6

Chun Xia, Tingyu Zhao, Junhua Fang, Lei Zhu, Zhen Huang

{"title":"Experimental study of stratified lean burn characteristics on a dual injection gasoline engine","authors":"Chun Xia, Tingyu Zhao, Junhua Fang, Lei Zhu, Zhen Huang","doi":"10.1007/s11708-021-0812-6","DOIUrl":"10.1007/s11708-021-0812-6","url":null,"abstract":"<div><p>Due to increasingly stringent fuel consumption and emission regulation, improving thermal efficiency and reducing particulate matter emissions are two main issues for next generation gasoline engine. Lean burn mode could greatly reduce pumping loss and decrease the fuel consumption of gasoline engines, although the burning rate is decreased by higher diluted intake air. In this study, dual injection stratified combustion mode is used to accelerate the burning rate of lean burn by increasing the fuel concentration near the spark plug. The effects of engine control parameters such as the excess air coefficient (Lambda), direct injection (DI) ratio, spark interval with DI, and DI timing on combustion, fuel consumption, gaseous emissions, and particulate emissions of a dual injection gasoline engine are studied. It is shown that the lean burn limit can be extended to Lambda = 1.8 with a low compression ratio of 10, while the fuel consumption can be obviously improved at Lambda = 1.4. There exists a spark window for dual injection stratified lean burn mode, in which the spark timing has a weak effect on combustion. With optimization of the control parameters, the brake specific fuel consumption (BSFC) decreases 9.05% more than that of original stoichiometric combustion with DI as 2 bar brake mean effective pressure (BMEP) at a 2000 r/min engine speed. The NO<sub><i>x</i></sub> emissions before three-way catalyst (TWC) are 71.31% lower than that of the original engine while the particle number (PN) is 81.45% lower than the original engine. The dual injection stratified lean burn has a wide range of applications which can effectively reduce fuel consumption and particulate emissions. The BSFC reduction rate is higher than 5% and the PN reduction rate is more than 50% with the speed lower than 2400 r/min and the load lower than 5 bar.</p></div>","PeriodicalId":570,"journal":{"name":"Frontiers in Energy","volume":"16 6","pages":"900 - 915"},"PeriodicalIF":2.9,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"5172516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3