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Coupling evaluation for material removal and thermal control on precision milling machine tools
《机械工程前沿(英文)》 2022年 第17卷 第1期 页码 12-12 doi: 10.1007/s11465-021-0668-9
关键词: machine tools cutting energy efficiency thermal stability machining accuracy coupling evaluation
Zhixiang WU, Lingen CHEN, Yanlin GE, Fengrui SUN
《能源前沿(英文)》 2019年 第13卷 第3期 页码 579-589 doi: 10.1007/s11708-018-0557-z
关键词: finite-time thermodynamics Dual-Miller cycle power output thermal efficiency ecological function
LIU Bin, SU Wanhua, WANG Hui, HUANG Haozhong
《能源前沿(英文)》 2007年 第1卷 第4期 页码 420-427 doi: 10.1007/s11708-007-0061-7
关键词: combustion compression homogenous in-cylinder modulated multi-pulse
Thermal and energy analysis of a Chinese kang
Zhi ZHUANG, Yuguo LI, Xudong YANG, Bin CHEN, Jiaping LIU,
《能源前沿(英文)》 2010年 第4卷 第1期 页码 84-92 doi: 10.1007/s11708-010-0009-x
关键词: Chinese kang elevated kang rural house thermal modeling building energy efficiency DeST
Xinfeng Wang, Tao Wang, Likun Xue, Wei Nie, Zheng Xu, Steven C. N. Poon, Wenxing Wang
《环境科学与工程前沿(英文)》 2017年 第11卷 第4期 doi: 10.1007/s11783-017-0925-7
关键词: TD-CIMS Peroxyacetyl nitrate Interference Photochemical pollution Formation efficiency
Experimental study of heat transfer coefficient with rectangular baffle fin of solar air heater
Foued CHABANE,Nesrine HATRAF,Noureddine MOUMMI
《能源前沿(英文)》 2014年 第8卷 第2期 页码 160-172 doi: 10.1007/s11708-014-0321-y
关键词: Nusselt number flow rate heat transfer heat transfer coefficient thermal efficiency forced convection
Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen
R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN
《能源前沿(英文)》 2015年 第9卷 第4期 页码 486-494 doi: 10.1007/s11708-015-0368-4
关键词: hydrogen brake thermal efficiency crank angle compressed ignition (CI)
一种高效的二冲程发动机概念——结合空气混合动力系统的增压 直流扫气式直喷汽油(BUSDIG)发动机 Review
王新颜, 赵华
《工程(英文)》 2019年 第5卷 第3期 页码 535-547 doi: 10.1016/j.eng.2019.03.008
本研究提出并设计了一种新颖的二冲程增压直流扫气式直喷汽油(BUSDIG)发动机,以实现发动机小型化和低速化,进而提升发动机的性能和效率。本文综述了BUSDIG 发动机的设计和开发过程,并总结了主要的研究成果。为了最大限度地提高发动机的扫气性能,并实现合理的缸内流动以促进燃油/ 空气的混合过程,本研究采用三维(3D)计算流体动力学(CFD)模拟手段系统分析了发动机缸径/ 冲程比(B/S)、扫气道角度和进气道的设计。此外,本研究还系统分析了扫气口和排气门开启型线对扫气过程的影响。为实现最佳的缸内燃油分层,采用经过实验标定的Reize-Diwakar模型开展了缸内喷雾的CFD 模拟,系统分析了不同喷油策略对缸内混合气形成过程的影响。基于优化后的BUSDIG 发动机设计方案,在Ricardo WAVE 软件中构建了对应的一维(1D)发动机计算模型。计算结果表明,采用稀薄燃烧和喷水策略,二冲程BUSDIG发动机的最高有效热效率可达47.2%。在化学计量燃空当量比条件下,BUSDIG 发动机在1600 r∙min–1 的转速下可实现379 N∙m 的扭矩,在4000 r∙min–1 的转速下可达到112 kW∙L–1 的功率密度。
La ZHUO, Arjen Y. HOEKSTRA
《农业科学与工程前沿(英文)》 2017年 第4卷 第2期 页码 185-194 doi: 10.15302/J-FASE-2017149
关键词: field management irrigation efficiency water footprint water productivity water use efficiency
Evaluating R&D efficiency of China’s listed lithium battery enterprises
《工程管理前沿(英文)》 页码 473-485 doi: 10.1007/s42524-022-0213-5
关键词: Data Envelopment Analysis R&D investment efficiency China’s listed lithium battery enterprises technical efficiency pure technical efficiency scale efficiency
null
《农业科学与工程前沿(英文)》 2019年 第6卷 第4期 页码 357-365 doi: 10.15302/J-FASE-2019275
Phosphorus (P) is essential for life and for efficient crop production, but global P use with limited recycling is inefficient in several sectors, including agronomy. Unfortunately, plant physiologists, agronomists, farmers and end users employ different measures for P use efficiency (PUE), which often masks their values at different scales. The term P use effectiveness, which also considers energetic and sustainability measures in addition to P balances, is also a valuable concept. Major physiological and genetic factors for plant P uptake and utilization have been identified, but there has been limited success in genetically improving PUE of modern crop cultivars. In maize, studies on root architectural and morphological traits appear promising. Rhizosphere processes assist in mobilizing and capturing sparingly soluble phosphate from rock phosphate. Combinations of phosphate-solubilizing microorganisms with ammonium-based nitrogen fertilizer, as well as strategies of fertilizer placement near the roots of target crops, can moderately enhance PUE. The desired concentration of P in the products differs, depending on the final use of the crop products as feed, food or for energy conversion, which should be considered during crop production.
关键词: acquisition efficiency plant growth promoting rhizobacteria phosphate use efficiency utilization efficiency
Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI
《机械工程前沿(英文)》 2018年 第13卷 第4期 页码 563-570 doi: 10.1007/s11465-018-0487-9
The thermal hydraulic (TH) behavior of coo-lant water is a key factor in the structural integrity assessments on reactor pressure vessels (RPVs) of pressurized water reactors (PWRs) under pressurized thermal shock (PTS) events, because the TH behavior may affect the loading conditions in the assessment. From the viewpoint of TH behavior, configuration of plant equipment and their dimensions, and operator action time considerably influence various parameters, such as the temperature and flow rate of coolant water and inner pressure. In this study, to investigate the influence of the operator action time on TH behavior during a PTS event, we developed an analysis model for a typical Japanese PWR plant, including the RPV and the main components of both primary and secondary systems, and performed TH analyses by using a system analysis code called RELAP5. We applied two different operator action times based on the Japanese and the United States (US) rules: Operators may act after 10 min (Japanese rules) and 30 min (the US rules) after the occurrence of PTS events. Based on the results of TH analysis with different operator action times, we also performed structural analyses for evaluating thermal-stress distributions in the RPV during PTS events as loading conditions in the structural integrity assessment. From the analysis results, it was clarified that differences in operator action times significantly affect TH behavior and loading conditions, as the Japanese rule may lead to lower stresses than that under the US rule because an earlier operator action caused lower pressure in the RPV.
关键词: structural integrity reactor pressure vessel pressurized thermal shock thermal hydraulic analysis pressurized water reactor weld residual stress
Assessment indices for uniform and non-uniform thermal environments
ZHANG Yufeng, SUN Shufeng, ZHAO Rongyi
《能源前沿(英文)》 2008年 第2卷 第2期 页码 129-133 doi: 10.1007/s11708-008-0029-y
关键词: thermal sensation proper assessment relationship equivalent thermal acceptability
Liquid metal thermal hydraulics R&D at European scale: achievements and prospects
《能源前沿(英文)》 2021年 第15卷 第4期 页码 842-853 doi: 10.1007/s11708-021-0743-2
Optimization of power and efficiency for an irreversible Diesel heat engine
Shiyan ZHENG, Guoxing LIN
《能源前沿(英文)》 2010年 第4卷 第4期 页码 560-565 doi: 10.1007/s11708-010-0018-9
关键词: Diesel heat engine irreversibility power output efficiency parameter optimization
标题 作者 时间 类型 操作
Coupling evaluation for material removal and thermal control on precision milling machine tools
期刊论文
Optimization of the power, efficiency and ecological function for an air-standard irreversible Dual-Miller
Zhixiang WU, Lingen CHEN, Yanlin GE, Fengrui SUN
期刊论文
distribution of modulated multi-pulse injection modes based diesel HCCI combustion and their effects on engine thermalefficiency and emissions
LIU Bin, SU Wanhua, WANG Hui, HUANG Haozhong
期刊论文
Thermal and energy analysis of a Chinese kang
Zhi ZHUANG, Yuguo LI, Xudong YANG, Bin CHEN, Jiaping LIU,
期刊论文
Peroxyacetyl nitrate measurements by thermal dissociation–chemical ionization mass spectrometry in an
Xinfeng Wang, Tao Wang, Likun Xue, Wei Nie, Zheng Xu, Steven C. N. Poon, Wenxing Wang
期刊论文
Experimental study of heat transfer coefficient with rectangular baffle fin of solar air heater
Foued CHABANE,Nesrine HATRAF,Noureddine MOUMMI
期刊论文
Performance, emission and combustion characteristics of CI engine fuelled with diesel and hydrogen
R. Senthil KUMAR,M. LOGANATHAN,E. James GUNASEKARAN
期刊论文
The effect of different agricultural management practices on irrigation efficiency, water use efficiency
La ZHUO, Arjen Y. HOEKSTRA
期刊论文
Improving the efficiency and effectiveness of global phosphorus use: focus on root and rhizosphere levels
null
期刊论文
Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics
Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI
期刊论文
Assessment indices for uniform and non-uniform thermal environments
ZHANG Yufeng, SUN Shufeng, ZHAO Rongyi
期刊论文