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Effectiveness analysis and optimum design of the rotary regenerator for thermophotovoltaic (TPV) system

Xi WU, Hong YE, Jianxiang WANG, Jie HE, Jian YANG

Frontiers in Energy 2012, Volume 6, Issue 2,   Pages 193-199 doi: 10.1007/s11708-012-0184-z

Abstract: The influence of the period of rotation on the effectiveness of the thermophotovoltaic (TPV) rotary regeneratorBased on the modified model, the influence of geometrical parameters of rotary regenerator on the effectivenessThe results demonstrate that the effectiveness increases with the increase of the rotary regenerator

Keywords： thermophotovoltaic (TPV) system     rotary regenerator     effectiveness     carryover loss    

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Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Frontiers in Energy 2009, Volume 3, Issue 1,   Pages 80-84 doi: 10.1007/s11708-009-0008-y

Abstract: A brief review is presented on previous experimental results and correlations on the friction factor of cryocooler regenerators operating at oscillating flow and pulsating pressure conditions, for different mesh sizes of packed woven screens, focusing on the effects of different operating frequencies ranging from 20 to 80 Hz, at room and cryogenic temperatures. A comparison of the friction factor data with those of other studies is presented to clarify the reason for the difference. Finally, a new oscillating flow correlation of regenerators, in terms of several non-dimensional parameters, is discussed and compared.

Keywords： friction factor     regenerator     oscillating flow     high frequency    

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Soybean drying characteristics in microwave rotary dryer with forced convection

Ruifang WANG, Zhanyong LI, Yanhua LI, Jingsheng YE

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3,   Pages 289-292 doi: 10.1007/s11705-009-0022-y

Abstract: A new hybrid drying technique by combining microwave and forced convection drying within a rotary drum, i.e., microwave rotary drying, was developed with the purpose to improve the uniformity of microwaveIn a laboratory microwave rotary dryer, rewetted soybean was utilized as experimental material to study

Keywords： cracking     microwave     rotary drying     soybean    

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Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4,   Pages 344-350 doi: 10.1007/s11465-016-0406-x

Abstract: The structure of the rotary valve has received considerable research interest because of its favorableThis paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novel

Keywords： direct drive rotary valve     computational fluid dynamics (CFD)     flow regulation    

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The application of DX rotary and squeezed pile on railway bridge engineering

Zhang Dehua,Wang Mengshu

Strategic Study of CAE 2009, Volume 11, Issue 7,   Pages 92-96

Abstract:

Squeezed pile with plates (being DX pile) is a new type pile that has been developed in recent years. Based on common cast-in-place pile, it adequately avails itself of the bearing capacity of each soil hard layer. According to the difference of design bearing capacity and engineering geological condition, it consists of plates by the squeezing equipment of hydraulic pressure in the different parts of DX pile. DX pile is a sort of change-section pile and is priority to shaft resistance between friction pile and shaft pile. Making use of the tip resistance of breaches and plates and shaft resistance around the branches is in order to add the shaft resistance and tip resistance. In situ test has shown that it can sharply improve the bearing capacity of pile. DX squeezed pile cannot only be applied in clay, silt, sand, weathering rock mass and residual deposits of soil, but also can be used in interactive layers of gravel,clay,and sand. The diameter of DX squeezed pile can be 400~2 000 mm,and the length of it can be more than 60 m. It is a new type of pile which has a bright future for application. Now it has got the extensive application in high building, bridge,civil engineering and high structure. Due to it's good bearing capacity and low settlements,it can an be applied and promoted to different foundation engineering of railway bridge engineering,and would get a good prospect of application and extension.

Keywords： DX pile     DX rotary and squeezed pile     bearing capacity    

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Performance of rolling piston type rotary compressor using fullerenes (C70) and NiFe

Ruixiang WANG,Yihao ZHANG,Yi LIAO

Frontiers in Energy 2020, Volume 14, Issue 3,   Pages 644-648 doi: 10.1007/s11708-017-0453-y

Abstract: A novel way for a compressor to improve its coefficient of performance was proposed in this paper. Fullerenes (C70) and NiFe O nanocomposites were modified by span 80 and dispersed in refrigeration oil by solid grinding (SG). Besides, the tribological properties of the nanocomposites were investigated using a four ball friction tester. The results show that when the mass concentration of fullerenes nanocomposite is higher than 60 ppm and the concentration of nano-oil is 2 g/L, the friction coefficient decreases from 0.13 to 0.06 which means the wear is reduced. The coefficient of performance of the compressor under the air conditioning test condition can be raised by 1.23%.

Keywords： rotary compressor     friction coefficient     nanocomposite materials     coefficient of performance     fullerenes    

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Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1488-1

Abstract:

• Adding kaolin/zeolite promotes the formation of stable heavy metals.

Keywords： Co-pyrolysis     Sewage sludge     Heavy metals     Rotary kiln     Immobilization mechanism    

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Novel precision piezoelectric step rotary actuator

LIU Jianfang, YANG Zhigang, ZHAO Hongwei, CHENG Guangming

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3,   Pages 356-360 doi: 10.1007/s11465-007-0062-2

Abstract: A novel piezoelectric (PZT) precision step rotary actuator was developed on the basis of PZT technologydistributed thin flexible hinge to solve problems such as ineffective anchoring/loosening, low step rotaryIt greatly improves the ability to drive the existing PZT step rotary actuator.

Keywords： developed     stability     ineffective anchoring/loosening     technology     piezoelectric    

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Modeling and analysis of steady-state vibration induced by backlash in servo rotary table

Xiao YANG,Dun LU,Sanli LIU,Jun ZHANG,Wanhua ZHAO

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 43-47 doi: 10.1007/s11465-015-0327-0

Abstract: This paper presents a mathematical model of a servo rotary table, considering the effect of backlash.

Keywords： backlash     servo rotary table     steady-state vibration    

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Study on the technology of rotary drilling rig used for bored piles

Li Lin,Min Feng

Strategic Study of CAE 2010, Volume 12, Issue 4,   Pages 33-36

Abstract: All the piles are constructed by rotary drilling rig.Based on the construction of the bridge, the paper analyses the construction techniques of rotary drilling

Keywords： rotary drilling rig     construction     bored pile     technology     feature    

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general parameterized time--frequency transform and its application in the feature extraction of a rotary

Peng ZHOU, Zhike PENG, Shiqian CHEN, Yang YANG, Wenming ZHANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 292-300 doi: 10.1007/s11465-017-0443-0

Abstract:

With the development of large rotary machines for faster and more integrated performance, the conditionSince the time-frequency (TF) pattern of the vibration signal from the rotary machine often contains

Keywords： rotary machines     condition monitoring     fault diagnosis     GPTFT     SCI    

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Impact drive rotary precision actuator with piezoelectric bimorphs

ZHANG Hongzhuang, ZENG Ping, HUA Shunming, CHENG Guangming, YANG Zhigang

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 1,   Pages 71-75 doi: 10.1007/s11465-008-0008-3

Abstract: An impact drive rotary precision actuator with end-loaded piezoelectric cantilever bimorphs is proposed

Keywords： specific fixed-frequency     waveform     piezoelectric cantilever     mechanisms     adjustable-amplitude    

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Study on dynamics of rotary swaging machine driven by servo motor

Song Tao,Zhao Shengdun,Yan Guanhai,Liu Hongbao

Strategic Study of CAE 2013, Volume 15, Issue 1,   Pages 63-67

Abstract:

In this paper, the servo motor driven swaging machine was designed; profile of striker was derived from cycloidal motion curve and its motion features were analyzed. The maximum load of swaging machine was calculated by upper bound method. According to the calculation, the maximum load of swaging machine decreased with die angle increasing, but on the other hand, the push force on perform increased. The compromised die angle in the field was 5°~ 15°.

Keywords： rotary swaging     servo drive     upper bound method    

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Multi-Objective Adaptive Optimization Model Predictive Control: Decreasing Carbon Emissions from a Zinc Oxide Rotary Article

Ke Wei, Keke Huang, Chunhua Yang, Weihua Gui

Engineering 2023, Volume 27, Issue 8,   Pages 96-105 doi: 10.1016/j.eng.2023.01.017

Abstract:

The zinc oxide rotary kiln, as an essential piece of equipment in the zinc smelting industrial processAlthough researchers have revealed the principle of the rotary kiln and set up computational fluid dynamicsproblem in real time, a suitable setting value is sent to the MPC layer to ensure that the zinc oxide rotary

Keywords： Zinc oxide rotary kiln     Model reduction     Sparse identification     Real-time optimization     Model predictive    

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Exergy analysis and simulation of a 30MW cogeneration cycle

Nikhil Dev, Samsher, S. S. Kachhwaha, Rajesh Attri

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 2,   Pages 169-180 doi: 10.1007/s11465-013-0263-9

Abstract:

Cogeneration cycle is an efficient mean to recover the waste heat from the flue gases coming out of gas turbine. With the help of computer simulation, design parameters may be selected for the best performance of cogeneration cycle. In the present work a program is executed in software EES on the basis of mathematical modelling described in paper to study cogeneration cycle performance for different parameters. Results obtained are compared with the results available in literature and are found in good agreement with them. Real gas and water properties are inbuilt in the software. Results show that enthalpy of air entering the combustion chamber is higher than that of the flue gases at combustion chamber outlet. For different operative conditions, energy and exergy efficiencies follow similar trends; although, exergy efficiency values are always lower than the corresponding energy efficiency ones. From the results it is found that turbine outlet temperature (TIT) of 524°C is uniquely suited to efficient cogeneration cycle because it enables the transfer of heat from exhaust gas to the steam cycle to take place over a minimal temperature difference. This temperature range results in the maximum thermodynamic availability while operating with highest temperature and highest efficiency cogeneration cycle. Effect of cycle pressure ratio (CR), inlet air temperature (IAT) and water pressure at heat recovery steam generator (HRSG) inlet on the 30 MW cogeneration cycle is also studied.

Keywords： Cogeneration cycle     air compressor     HRSG     gas turbine     regenerator     CR     IAT    

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Title Author Date Type Operation

Effectiveness analysis and optimum design of the rotary regenerator for thermophotovoltaic (TPV) system

Xi WU, Hong YE, Jianxiang WANG, Jie HE, Jian YANG

Journal Article

Comparative study of oscillating flow characteristics of cryocooler regenerator at low temperatures

Yonglin JU , Qingqing SHEN ,

Journal Article

Soybean drying characteristics in microwave rotary dryer with forced convection

Ruifang WANG, Zhanyong LI, Yanhua LI, Jingsheng YE

Journal Article

Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Journal Article

The application of DX rotary and squeezed pile on railway bridge engineering

Zhang Dehua,Wang Mengshu

Journal Article

Performance of rolling piston type rotary compressor using fullerenes (C70) and NiFe

Ruixiang WANG,Yihao ZHANG,Yi LIAO

Journal Article

Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Journal Article

Novel precision piezoelectric step rotary actuator

LIU Jianfang, YANG Zhigang, ZHAO Hongwei, CHENG Guangming

Journal Article

Modeling and analysis of steady-state vibration induced by backlash in servo rotary table

Xiao YANG,Dun LU,Sanli LIU,Jun ZHANG,Wanhua ZHAO

Journal Article

Study on the technology of rotary drilling rig used for bored piles

Li Lin,Min Feng

Journal Article

general parameterized time--frequency transform and its application in the feature extraction of a rotary

Peng ZHOU, Zhike PENG, Shiqian CHEN, Yang YANG, Wenming ZHANG

Journal Article

Impact drive rotary precision actuator with piezoelectric bimorphs

ZHANG Hongzhuang, ZENG Ping, HUA Shunming, CHENG Guangming, YANG Zhigang

Journal Article

Study on dynamics of rotary swaging machine driven by servo motor

Song Tao,Zhao Shengdun,Yan Guanhai,Liu Hongbao

Journal Article

Multi-Objective Adaptive Optimization Model Predictive Control: Decreasing Carbon Emissions from a Zinc Oxide Rotary

Ke Wei, Keke Huang, Chunhua Yang, Weihua Gui

Journal Article

Exergy analysis and simulation of a 30MW cogeneration cycle

Nikhil Dev, Samsher, S. S. Kachhwaha, Rajesh Attri

Journal Article