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Optimization of cold-end system of thermal power plants based on entropy generation minimization

Frontiers in Energy 2022, Volume 16, Issue 6,   Pages 956-972 doi: 10.1007/s11708-021-0785-5

Abstract: However, little attention has been paid to the optimization of the cold-end system with multi-pressureThe results show that the entropy generation rate of the multi-pressure cold-end system is less thanthat of the single-pressure cold-end system when the total condenser area is constant.Moreover, the economic performance can be improved with the adoption of the multi-pressure cold-end systemWhen compared with the single-pressure cold-end system, the excess revenues gained by using dual- and

Keywords： cold-end system     entropy generation minimization     optimization     economic analysis     genetic algorithm    

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Optimization of turbine cold-end system based on BP neural network and genetic algorithm

Chang CHEN,Danmei XIE,Yangheng XIONG,Hengliang ZHANG

Frontiers in Energy 2014, Volume 8, Issue 4,   Pages 459-463 doi: 10.1007/s11708-014-0335-5

Abstract: The operation condition of the cold-end system of a steam turbine has a direct impact on the economyand security of the unit as it is an indispensible auxiliary system of the thermal power unit.Many factors influence the cold-end operation of a steam turbine; therefore, the operation mode needsThe optimization analysis of a 1000 MW ultra-supercritical (USC) unit, the turbine cold-end system, wasthat the optimized parameters were of significance to the performance and economic operation of the system

Keywords： optimization     turbine     cold-end system     BP neural network     genetic algorithm    

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Optimization of cold end system of steam turbine

ZHAO Bin, LIU Ling, ZHANG Wenbing

Frontiers in Energy 2008, Volume 2, Issue 3,   Pages 348-353 doi: 10.1007/s11708-008-0036-z

Abstract: An optimization of the movement characteristic of the cold end system of the steam turbine was conducted

Keywords： circulation     characteristic     analysis     optimization     condenser    

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Polyamines and antioxidant defense system are associated with cold tolerance in centipedegrass

Jingjing CHEN, Junyang FANG, Zhenfei GUO, Shaoyun LU

Frontiers of Agricultural Science and Engineering 2018, Volume 5, Issue 1,   Pages 129-138 doi: 10.15302/J-FASE-2017197

Abstract: Physiological responses to low temperature were analyzed in a chilling-tolerant centipedegrass ( ) accession, Shao Guan (SG), in comparison to the commercial cultivar, Common. Lower levels of ion leakage and higher chlorophyll (Chl) concentration were observed in SG than in Common during chilling stress. The maximum photochemical efficiency, the actual photosystem II (PSII) efficiency, photochemical quenching efficiency, and net photosynthetic rate were decreased during chilling stress in both genotypes, with higher levels of these parameters shown by SG than Common. In addition, higher activities of superoxide dismutase (SOD), catalase (CAT), ascorbate-peroxidase (APX) and glutathione reductase (GR), and higher concentrations of ascorbic acid (AsA) and glutathione (GSH) were observed in SG than in Common. Moreover, higher concentrations of putrescine (Put), spermidine (Spd), and spermine (Spm) were observed in SG than in Common. Correlation analysis indicated that SOD, CAT, APX and GR activities, and AsA and GSH concentrations showed high correlation to Put, while APX, GR, and AsA concentrations were correlated to Spd. Exogenous Put or Spd increased antioxidant enzyme activities and chilling tolerance. The results suggested that polyamine-regulated antioxidants are important for chilling tolerance in centipedegrass and protect plants against chilling induced oxidative damage.

Keywords： antioxidants     centipedegrass     chilling     photosynthesis     polyamines    

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Establishment of the Comprehensive Evaluation System of Cold Stamping Die Quality

LU Xiao-chun, GUO Sheng, RUAN Feng

Frontiers of Mechanical Engineering 2006, Volume 1, Issue 1,   Pages 80-84 doi: 10.1007/s11465-005-0021-8

Abstract:

A comprehensive evaluation system of die quality, a multiplayer hierarchical amendment index systemaccording to the characteristics of cold stamping die production, an evaluation standard referring toThe applications show that the system can be used to evaluate the die quality objectively, fairly, and

Keywords： scientific evaluation     stamping     multiplayer hierarchical     technique     evaluation standard    

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A simplified model of direct-contact heat transfer in desalination system utilizing LNG cold energy

Qingqing SHEN, Wensheng LIN, Anzhong GU, Yonglin JU

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 122-128 doi: 10.1007/s11708-012-0175-0

Abstract: extensive utilization of liquefied natural gas (LNG) in China today, sustainable and effective using of LNG coldIn this paper, the utilization of LNG cold energy in seawater desalination system is proposed and analyzedIn this system, the cold energy of the LNG is first transferred to a kind of refrigerant, i.e., butaneThe cold refrigerant is then directly injected into the seawater.A simplified model of the direct-contact heat transfer in this desalination system is proposed and theoretical

Keywords： liquefied natural gas (LNG)     cold energy utilization     desalination     direct-contact heat transfer    

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Radial electromagnetic type unbalance vibration self-recovery regulation system for high-end grinding

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0763-1

Abstract: Modern rotating machines, which are represented by high-end grinding machines, have developed towardThe unbalance vibration self-recovery regulation (UVSRR) system is proposed to suppress the vibrationFirst, technical principles and the system composition are introduced.Second, the balancing actuator in the UVSRR system is analyzed in detail.Finally, the engineering application value of the UVSRR system is verified by laboratory performance

Keywords： UVSRR system     radial electromagnetic type     vibration suppression     performance simulation     engineering    

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Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Frontiers in Energy 2014, Volume 8, Issue 3,   Pages 394-402 doi: 10.1007/s11708-014-0310-1

Abstract: this study is to evaluate the performance of a centralized open-loop ground-water heat pump (GWHP) systemfor climate conditioning in Beijing with a cold climate in China.Thus, a long-time test was conducted on a running GWHP system for the heating season from December 2011testing data indicates that the average heat-pump coefficient of performance (COP) and the COP of the systemTherefore, some suggestions are proposed to improve the performance for GWHPs in the cold climate region

Keywords： ground-water heat pump (GWHP)     actual coefficient of performance     heat transfixion    

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End-to-end delay analysis for networked systems

Jie SHEN,Wen-bo HE,Xue LIU,Zhi-bo WANG,Zhi WANG,Jian-guo YAO

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 9,   Pages 732-743 doi: 10.1631/FITEE.1400414

Abstract: End-to-end delay measurement has been an essential element in the deployment of real-time services inWe propose a novel theoretical framework to analyze the end-to-end delay distributions of networked systemsWe use a signal flow graph to model the delay distribution of a networked system and prove that the end-to-endBy analyzing the time responses of the transfer function, we obtain the end-to-end delay distribution

Keywords： Networked system     End-to-end     Delay distribution    

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Heating energy savings potential from retrofitting old apartments with an advanced double-skin façade systemin cold climate

Yeo Beom YOON, Byeongmo SEO, Brian Baewon KOH, Soolyeon CHO

Frontiers in Energy 2020, Volume 14, Issue 2,   Pages 224-240 doi: 10.1007/s11708-020-0801-1

Abstract: This paper proposes an advanced double-skin façade (DSF) system to replace existing balcony windows inConsidering the cold climate conditions of Seoul, South Korea, it mainly discusses heating energy savingsThe EnergyPlus simulation program was used to develop simulation models for a floor radiant heating systemA typical gas boiler was selected for low-temperature radiant system modeling.The air flow network method was used to model the proposed DSF system.

Keywords： double-skin façade     retrofitting     high-rise apartment     heating energy     building simulation    

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Topology-independent end-to-end learning model for improving the voltage profile in microgrids-integrated

Frontiers in Energy 2023, Volume 17, Issue 2,   Pages 211-227 doi: 10.1007/s11708-022-0847-3

Abstract: In this paper, we propose a novel data-driven voltage profile improvement model, denoted as system-widestudies that realize topology identification and decision-making optimization in sequence, the proposed end-to-endIn particular, the generator in SCAN is trained by the core modules in sequence so as to form an end-to-end

Keywords： end-to-end learning     microgrids     voltage profile improvement     generative adversarial network    

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review on technologies with electricity generation potentials using liquified natural gas regasification cold

Frontiers in Energy 2023, Volume 17, Issue 3,   Pages 332-379 doi: 10.1007/s11708-023-0863-y

Abstract: scenarios, the effective and efficient utilization of the liquified natural gas (LNG) regasification cold

Keywords： liquified natural gas     cold energy     power generation    

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Construction of a new Lyapunov function for a dissipative gyroscopic system using the residual energy Personal View

Cem CİVELEK, Özge CİHANBEĞENDİ

Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 4,   Pages 629-634 doi: 10.1631/FITEE.1900014

Abstract: In a dissipative gyroscopic system with four degrees of freedom and tensorial variables in contravariantThe generalized elements are determined using the {L, D}-model of the system.

Keywords： Lyapunov function     Residual energy function     Stability of dissipative gyroscopic system    

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Current understanding and applications of the cold sintering process

Tong Yu, Jiang Cheng, Lu Li, Benshuang Sun, Xujin Bao, Hongtao Zhang

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 4,   Pages 654-664 doi: 10.1007/s11705-019-1832-1

Abstract: To overcome these drawbacks, a novel processing technique called “cold sintering process (CSP)” has been

Keywords： cold sintering process     processing variables     solid-state rechargeable batteries    

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Application of cold spraying for flux-free brazing of aluminium alloy 6060

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3,   Pages 256-260 doi: 10.1007/s11465-010-0095-9

Abstract: In the present study, samples of aluminium alloy 6060 were coated by cold spraying with a powder of brazingCoated samples were brazed flux-free under argon atmosphere by an induction heating system.The results show that the brazing alloy Al12Si could be very well deposited on the substrate by coldmetallurgical bond between the Al12Si coatings and the substrate could be realized by the deposition using cold

Keywords： aluminium alloy     flux-free brazing     cold spraying     shear strength    

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Title Author Date Type Operation

Optimization of cold-end system of thermal power plants based on entropy generation minimization

Journal Article

Optimization of turbine cold-end system based on BP neural network and genetic algorithm

Chang CHEN,Danmei XIE,Yangheng XIONG,Hengliang ZHANG

Journal Article

Optimization of cold end system of steam turbine

ZHAO Bin, LIU Ling, ZHANG Wenbing

Journal Article

Polyamines and antioxidant defense system are associated with cold tolerance in centipedegrass

Jingjing CHEN, Junyang FANG, Zhenfei GUO, Shaoyun LU

Journal Article

Establishment of the Comprehensive Evaluation System of Cold Stamping Die Quality

LU Xiao-chun, GUO Sheng, RUAN Feng

Journal Article

A simplified model of direct-contact heat transfer in desalination system utilizing LNG cold energy

Qingqing SHEN, Wensheng LIN, Anzhong GU, Yonglin JU

Journal Article

Radial electromagnetic type unbalance vibration self-recovery regulation system for high-end grinding

Journal Article

Evaluation of the performance of a centralized ground-water heat pump system in cold climate region

Shilei LU,Zhe CAI,Li ZHANG,Yiran LI

Journal Article

End-to-end delay analysis for networked systems

Jie SHEN,Wen-bo HE,Xue LIU,Zhi-bo WANG,Zhi WANG,Jian-guo YAO

Journal Article

Heating energy savings potential from retrofitting old apartments with an advanced double-skin façade systemin cold climate

Yeo Beom YOON, Byeongmo SEO, Brian Baewon KOH, Soolyeon CHO

Journal Article

Topology-independent end-to-end learning model for improving the voltage profile in microgrids-integrated

Journal Article

review on technologies with electricity generation potentials using liquified natural gas regasification cold

Journal Article

Construction of a new Lyapunov function for a dissipative gyroscopic system using the residual energy

Cem CİVELEK, Özge CİHANBEĞENDİ

Journal Article

Current understanding and applications of the cold sintering process

Tong Yu, Jiang Cheng, Lu Li, Benshuang Sun, Xujin Bao, Hongtao Zhang

Journal Article

Application of cold spraying for flux-free brazing of aluminium alloy 6060

Kirsten BOBZIN, Lidong ZHAO, Thomas SCHLAEFER, Thomas WARDA,

Journal Article