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High-efficiency inspecting method for mobile robots based on task planning for heat transfer tubes ina steam generator

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 2, doi: 10.1007/s11465-022-0741-z

Abstract: Many heat transfer tubes are distributed on the tube plates of a steam generator that requires periodicSince there are thousands of tubes to be checked, task planning is essential to guarantee the preciseMost in-service robots check the task tubes using row-by-row and column-by-column planning.

Keywords： steam generator transfer tubes     mobile robot     dexterous structure     task planning     efficient inspection    

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Modeling analysis on solar steam generator employed in multi-effect distillation (MED) system

Zhaorui ZHAO, Bao YANG, Ziwen XING

Frontiers in Energy 2019, Volume 13, Issue 1,   Pages 193-203 doi: 10.1007/s11708-019-0608-0

Abstract: Specifically, the effects of operating parameters, such as the motive steam temperature, seawater flowproduced have been investigated in the MED desalination system combined with the bilayer wood solar steamgenerator.It is found that, under a given operating condition, there exists an optimum steam generation temperatureThis parametric simulation study will help the design of efficient bilayer wood solar steam generator

Keywords： solar energy     steam generating     multi-effect desalination    

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Heat transfer coefficient of wheel rim of large capacity steam turbines

SHI Jinyuan, DENG Zhicheng, YANG Yu, JUN Ganwen

Frontiers in Energy 2008, Volume 2, Issue 1,   Pages 20-24 doi: 10.1007/s11708-008-0015-4

Abstract: A way of calculating the overall equivalent heat transfer coefficient of wheel rims of large capacitysteam turbines is presented.The method and formula to calculate the mean forced convection heat-transfer coefficient of the surfaceA fin heat transfer model was then used to calculate the equivalent heat transfer coefficient of theof temperature and thermal stress fields of steam turbine rotors.

Keywords： convection heat-transfer     capacity     heat-transfer coefficient     bottom     transmission    

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Effect of heat transfer coefficient of steam turbine rotor on thermal stress field under off-design condition

Jie GUO,Danmei XIE,Hengliang ZHANG,Wei JIANG,Yan ZHOU

Frontiers in Energy 2016, Volume 10, Issue 1,   Pages 57-64 doi: 10.1007/s11708-015-0385-3

Abstract: The precise calculation of temperature and thermal stress field of steam turbine rotor under off-designof paramount significance for safe and economic operation, in which an accurate calculation of heat transferThe result shows that the accuracy of coefficient calculation when steam parameters are low has a greaterWhen steam parameters are high and HT coefficient is larger than 10 W/(m ·°C), there will be barely

Keywords： steam turbine     rotor     thermal stress     heat transfer coefficient     empirical formula    

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A new heat transfer correlation for supercritical fluids

Yanhua YANG, Xu CHENG, Shanfang HUANG

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 226-232 doi: 10.1007/s11708-009-0022-0

Abstract: A new method of heat transfer prediction in supercritical fluids is presented.Assessment of qualitative behaviour of heat transfer is conducted based on existing test data and experiencesingle dimensionless number, the acceleration number, is introduced to correct the deviation of heat transferThe new correlation structure excludes direct dependence of heat transfer coefficient on wall surfaceComparison of various heat transfer correlations with the selected test data shows that the new correlation

Keywords： super critical fluids     heat transfer     circular tubes     prediction method    

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A performance analysis of integrated solid oxide fuel cell and heat recovery steam generator for IGFC

Souman RUDRA, H. T. KIM, Jinwook LEE, L. ROSENDAHL,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 402-413 doi: 10.1007/s11708-010-0122-x

Abstract: The outputs from SOFC can be utilized by heat recovery steam generator (HRSG), which drives the steamefficiency of the heat recovery from the SOFC exhaust gas and to maximize the power production in the steamThe steam turbine efficiency was calculated for measuring the total power plant output.

Keywords： SOFC     HRSG     IGFC     syngas    

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Typical off-design analytical performances of internal combustion engine cogeneration

Xiaohong HE, Ruixian CAI

Frontiers in Energy 2009, Volume 3, Issue 2,   Pages 184-192 doi: 10.1007/s11708-009-0007-z

Abstract: In combination with analytical solution of single-pressure heat recovery steam generator (HRSG) and influenceThe approach temperature difference Δ , relative steam production and superheated steam temperatureIt is worth emphasizing that Δ is likely to be negative in low load condition with high design steamHence, approach temperature difference, relative steam production and superheated steam temperature decrease

Keywords： internal combustion engine (ICE)     cogeneration     heat recovery steam generator (HRSG)     off-design     superheatedsteam     saturated steam     ambient pressure    

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Experimental research of rust removed by flowing sodium

Liu Zejun,Sun Shuha

Strategic Study of CAE 2012, Volume 14, Issue 11,   Pages 99-102

Abstract: was found that there were badly oxidation phenomena in a superheater and a evaporator of CEFR's steamthe sodium technology department of CEFR to investigate how to removing the rust from the CEFR's steamBut the site condition of CEFR's steam generators can not achieve the ndition of the means of removingto investigate behavior of the oxidation surface of CEFR's steam generators in the flowing sodiumwould provide the esting foundation for the work of removing rust by flowing sodium of CEFR’s steam

Keywords： steam generator     sample     oxidation     removing rust by flowing sodium    

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Theoretical study on the confine-stiffening effect and fractal cracking of square concrete filled steel tubes

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1317-1336 doi: 10.1007/s11709-021-0763-3

Abstract: Based on an experimental program on tension performance of three square concrete-filled tubes (SCFT),

Keywords： square concrete filled tubes     confine-stiffening     confine-strengthening     fractal cracking     fracture    

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Transversal tube pitch effects on local heat transfer characteristics of the flat tube bank fin mounted

Liangbi WANG, Zhimin LIN, Kangjie SUN, Yuanxin DONG, Song LIU, Yongheng ZHANG,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 333-345 doi: 10.1007/s11708-009-0061-6

Abstract: The tube bank fin is commonly used to increase the area of the heat transfer surface with a small heattransfer coefficient of a heat exchanger.If vortex generators (VGs) are punched on the fin surface, the heat transfer performance of the fin canThis paper focused on the effect of transversal tube pitch on the local heat transfer performance ofused fin materials and fin thickness, the transversal tube pitch has considerable effect on the heat transfer

Keywords： heat transfer enhancement     vortex generator     finned flat tube bank     heat exchanger    

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Evaluation of the power-generation capacity of wearable thermoelectric power generator

Yang YANG, Jing LIU,

Frontiers in Energy 2010, Volume 4, Issue 3,   Pages 346-357 doi: 10.1007/s11708-010-0112-z

Abstract: energy generation capacity of a wearable TEG subject to various conditions based on biological heat transfer

Keywords： thermal energy harvester     thermoelectric generator     biological heat transfer     power generating capacity    

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Civil and structural engineering applications, recent trends, research and developments on pultruded fiber reinforced polymer closed sections: a review

Alfred Kofi GAND, Tak-Ming CHAN, James Toby MOTTRAM

Frontiers of Structural and Civil Engineering 2013, Volume 7, Issue 3,   Pages 227-244 doi: 10.1007/s11709-013-0216-8

Abstract: The objectives of this study are to review and evaluate the developments and applications of pultruded fiber-reinforced polymer composites in civil and structural engineering and review advances in research and developments. Several case applications are reviewed. The paper presents a state-of-the-art review of fundamental research on the behavior of pultruded fiber reinforced polymer closed sections and highlights gaps in knowledge and areas of potential further research.

Keywords： reinforced polymer composites     behaviour of FRPs tubular sections     pultruded FRP tubular profiles     FRP tubesin bridges     applications of pultruded FRP tubes     new-build with FRP tubes    

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High-Level Layout Technology and Engineering Application for Advanced Air-Cooled Ultra-Supercritical Steam-TurbineGenerator Unit

Wang Shumin, Zhang Yi, Xu Lu, Li Yanbing, Gu Yongzheng, Zhuo Hua, Sun Rui, Zhang Manping, Jiang Shihong, Liu Jianhai, Li Hongxing

Strategic Study of CAE 2023, Volume 25, Issue 2,   Pages 147-159 doi: 10.15302/J-SSCAE-2023.02.012

Abstract: generator unit.the main power house,thereby ensuring the safety of the main power house structure, high-temperature steampipelines, and steam turbine generator unit through technological breakthroughs.and reheat steam pipelines of the high-level layout (its operating floor level being 65 m) can save34.2% and 20.9% of raw materials,respectively; and exhaust steam pipes of the air-cooled island can save

Keywords： ultra-supercritical     advanced coal-fired power     air-cooled steam turbine generator unit     high-level layout    

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New technique of precision necking for long tubes with variable wall thickness

Yongqiang GUO, Chunguo XU, Jingtao HAN, Zhengyu WANG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 622-630 doi: 10.1007/s11465-019-0565-7

Abstract: This study analyzed the deformation law of rear axles with variable wall thickness under bidirectional horizontal extrusion and found that necking was accompanied by upsetting deformation through theoretical calculation, numerical simulation, and experimental research. The sequence and occurrence of necking and upsetting deformations were obtained. A theory of deformation was proposed by controlling the distribution of temperature field. Effective processes to control the wall thickness of rear axle at different positions were also proposed. The ultimate limit deformation with a necking coefficient of 0.68 could be achieved using the temperature gradient coefficient. A new technology of two-step heating and two-step extrusion for a 13 t rear axle was developed, qualified test samples were obtained, and suggestions for further industrial application were put forward.

Keywords： extrusion     rear axle     necking coefficient     temperature gradient    

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Intrinsic kinetics and external diffusion of catalytic steam gasification of fine coal char particles

Xuantao Wu, Jie Wang

Frontiers of Chemical Science and Engineering 2019, Volume 13, Issue 2,   Pages 415-426 doi: 10.1007/s11705-018-1725-8

Abstract: Catalytic steam gasification of fine coal char particles was carried out using a self-made laboratoryThe external mass transfer coefficients ( ) and the effectiveness factors were determined at lower GFVs

Keywords： coal char     catalytic steam gasification     pressure     kinetics     diffusion    

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Title Author Date Type Operation

High-efficiency inspecting method for mobile robots based on task planning for heat transfer tubes ina steam generator

Journal Article

Modeling analysis on solar steam generator employed in multi-effect distillation (MED) system

Zhaorui ZHAO, Bao YANG, Ziwen XING

Journal Article

Heat transfer coefficient of wheel rim of large capacity steam turbines

SHI Jinyuan, DENG Zhicheng, YANG Yu, JUN Ganwen

Journal Article

Effect of heat transfer coefficient of steam turbine rotor on thermal stress field under off-design condition

Jie GUO,Danmei XIE,Hengliang ZHANG,Wei JIANG,Yan ZHOU

Journal Article

A new heat transfer correlation for supercritical fluids

Yanhua YANG, Xu CHENG, Shanfang HUANG

Journal Article

A performance analysis of integrated solid oxide fuel cell and heat recovery steam generator for IGFC

Souman RUDRA, H. T. KIM, Jinwook LEE, L. ROSENDAHL,

Journal Article

Typical off-design analytical performances of internal combustion engine cogeneration

Xiaohong HE, Ruixian CAI

Journal Article

Experimental research of rust removed by flowing sodium

Liu Zejun,Sun Shuha

Journal Article

Theoretical study on the confine-stiffening effect and fractal cracking of square concrete filled steel tubes

Journal Article

Transversal tube pitch effects on local heat transfer characteristics of the flat tube bank fin mounted

Liangbi WANG, Zhimin LIN, Kangjie SUN, Yuanxin DONG, Song LIU, Yongheng ZHANG,

Journal Article

Evaluation of the power-generation capacity of wearable thermoelectric power generator

Yang YANG, Jing LIU,

Journal Article

Civil and structural engineering applications, recent trends, research and developments on pultruded fiber reinforced polymer closed sections: a review

Alfred Kofi GAND, Tak-Ming CHAN, James Toby MOTTRAM

Journal Article

High-Level Layout Technology and Engineering Application for Advanced Air-Cooled Ultra-Supercritical Steam-TurbineGenerator Unit

Wang Shumin, Zhang Yi, Xu Lu, Li Yanbing, Gu Yongzheng, Zhuo Hua, Sun Rui, Zhang Manping, Jiang Shihong, Liu Jianhai, Li Hongxing

Journal Article

New technique of precision necking for long tubes with variable wall thickness

Yongqiang GUO, Chunguo XU, Jingtao HAN, Zhengyu WANG

Journal Article

Intrinsic kinetics and external diffusion of catalytic steam gasification of fine coal char particles

Xuantao Wu, Jie Wang

Journal Article