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Effect of variable heat capacities on performance of an irreversible Miller heat engine

Xingmei YE

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 280-284 doi: 10.1007/s11708-012-0203-0

Abstract: Based on the variable heat capacities of the working fluid, the irreversibility coming from the compressionand expansion processes, and the heat leak losses through the cylinder wall, an irreversible cycle modelof the Miller heat engine was established, from which expressions for the efficiency and work outputMoreover, the influence of the compression and expansion efficiencies, the variable heat capacities andthe heat leak losses on the performance of the cycle was discussed in detail, and consequently, some

Keywords： Miller cycle     variable heat capacity     irreversibility     parametric optimization    

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Convective heat transfer in helical coils for constant-property and variable-property flows with high

Yufei MAO, Liejin GUO, Bofeng BAI, Ximin ZHANG

Frontiers in Energy 2010, Volume 4, Issue 4,   Pages 546-552 doi: 10.1007/s11708-010-0116-8

Abstract: Forced convection heat transfer of single-phase water in helical coils was experimentally studied.Both constant-property flows at normal pressure and variable-property flows at supercritical pressureThe contribution of secondary flow in the helical coil to heat transfer was gradually suppressed withHence, heat transfer coefficients of the helical tube were close to those of the straight tube underBased on the experimental data, heat transfer correlations for both incompressible flows and supercritical

Keywords： convective heat transfer     helical coils     high Reynolds number     supercritical pressure     variable property    

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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 capacityThe method and formula to calculate the mean forced convection heat-transfer coefficient of the surfaceThe heat transmission from the blade to the rim was simplified by analogy to heat transmission in theA fin heat transfer model was then used to calculate the equivalent heat transfer coefficient of theThe proposed method helps determine the heat transfer boundary conditions in finite element analyses

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

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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: Employing thermoelectric generators (TEGs) to gather heat dissipating from the human body through theWe evaluate the energy generation capacity of a wearable TEG subject to various conditions based on biologicalheat transfer theory.

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

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Will Germany move into a situation with unsecured power supply?

Harald SCHWARZ

Frontiers in Energy 2019, Volume 13, Issue 3,   Pages 551-570 doi: 10.1007/s11708-019-0641-z

Abstract: from German power generation is nearly constant for the past 20 years, even a renewable generation capacity2022: Due to a former decision of the German Government, the actual remaining nuclear power generation capacityhard coal and lignite-fired power plants, so that Germany should reduce its conventional generation capacityphotovoltaic, this paper will describe the negligible contribution of these sources to the secured generation capacity

Keywords： sub>2 reduction     mobility sector     renewable generation     coal commission     secured power generation capacity     reliable power supply     power-to-gas     power-to-heat    

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Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 3, doi: 10.1007/s11465-022-0691-5

Abstract: This study traces the development of dexterous hand research and proposes a novel antagonistic variablefinger mechanism not only achieves passive compliance against physical impacts, but also implements the variable

Keywords： multifingered hand     mechanism design     robot safety     variable stiffness actuator    

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A neural network-based production process modeling and variable importance analysis approach in corn

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 358-371 doi: 10.1007/s11705-022-2190-y

Abstract: In this paper, a neural network-based production process modeling and variable importance analysis approachUltimately, variable importance analysis is carried out by the extended weight connection method, and

Keywords： big data     corn to sugar factory     neural network     variable importance analysis    

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Novel Radiation-Adjustable Heating Terminal Based on Flat Heat Pipe Combined with Air Source Heat Pump Article

Yifan Wu,Hongli Sun,Mengfan Duan,Borong Lin,Hengxin Zhao,Chaohung Liu

Engineering 2023, Volume 20, Issue 1,   Pages 192-207 doi: 10.1016/j.eng.2021.09.019

Abstract: As a clean and sustainable electrified heating technology, air-source heat pumps (ASHPs) are widely usedRadiant terminals currently suffer from three major problems: limited maximum heating capacity, inabilityResults showed that the maximum heating capacity increased by 23.6% and radiation heat transfer ratioFurther, new flat heat pipe (FHP) design improved stability (compressor oil return), intermittency (refrigerant

Keywords： Novel heating terminal     Air-source heat pump     Structural improvement design     Maximum heating capacity     Rapid    

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On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 1,   Pages 5-15 doi: 10.1007/s11465-012-0310-y

Abstract:

Without modifying the cam contour, a cam mechanism with a variable input speed trajectory offers an

Keywords： cam mechanism     variable input speed     kinematic design     dynamic design     optimal design    

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Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 4,   Pages 711-725 doi: 10.1007/s11465-021-0647-1

Abstract: Thus, this paper aims to design a novel variable stiffness actuator (VSA) that can provide safer physicalVSA follows the idea of modular design, mainly including a variable stiffness module and a drive moduleThe variable stiffness module transmits the motion from the drive module in a roundabout manner, makingAs the key component of the variable stiffness module, a stiffness adjustment mechanism with a symmetrical

Keywords： variable stiffness actuator     variable stiffness module     drive module     symmetrical structure     double-deck    

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Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Frontiers in Energy 2017, Volume 11, Issue 4,   Pages 414-436 doi: 10.1007/s11708-017-0507-1

Abstract: In this paper, three important aspects for absorption heat pump for waste heat reuse are reviewed.In the first part, different absorption heat pump cycles are classified and introduced.Absorption heat pumps for heat amplification and absorption heat transformer for temperature upgradingIn the third part, the applications of the absorption heat pump and absorption heat transformer for wasteheat reuse in different industries are introduced.

Keywords： absorption     heat pump     heat transformer     waste heat     working pair    

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Performance design of a cryogenic air separation unit for variable working conditions using the lumped

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 24-42 doi: 10.1007/s11465-019-0558-6

Abstract: petrochemical and semiconductor industries, are being developed with high operating elasticity under variableThis feature indicates that thousands of technical parameters in adsorption, heat transfer, and distillationbasis of material and energy conservation laws, the piecewise-lumped parameters are extracted under variableLPM, the performance of the air compressor, molecular sieve adsorber, turbo expander, main plate-fin heatexchangers, and packing column of a 100000 Nm O /h large-scale ASU is enhanced to adapt to variable

Keywords： performance design     air separation unit (ASU)     lumped parameter model (LPM)     variable working conditions    

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Effects of radiation and heat source/sink on unsteady MHD boundary layer flow and heat transfer over

Krishnendu Bhattacharyya

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 3,   Pages 376-384 doi: 10.1007/s11705-011-1121-0

Abstract: In this paper, an investigation is made to study the effects of radiation and heat source/sink on theunsteady boundary layer flow and heat transfer past a shrinking sheet with suction/injection.The thermal boundary layer thickness decreases with Prandtl number, radiation parameter and heat sinkparameter, but it increases with heat source parameter.heat transfer.

Keywords： MHD boundary layer     unsteady flow     heat transfer     thermal radiation     heat source/sink     shrinking sheet     suction    

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Heat-spreading analysis of a heat sink base embedded with a heat pipe

B. V. BORGMEYER, H. B. MA,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 143-148 doi: 10.1007/s11708-010-0013-1

Abstract: A simplified model predicting the heat transfer performance of a heat sink base with a high thermal conductivityas the base embedded with a typical heat pipe, the entire heat sink can be modeled as a flat plate witha uniform temperature and an effective convection heat transfer coefficient.This simplified model can be used to determine the heat transfer performance of a heat sink embeddedwith a typical heat pipe or vapor chamber.

Keywords： heat pipe     heat sink     microprocessor heat removal    

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Application of entransy dissipation theory in heat convection

Mingtian XU, Jiangfeng GUO, Lin CHENG,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 402-405 doi: 10.1007/s11708-009-0055-4

Abstract: work, formulas for calculating the rates of the local thermodynamic entransy dissipation in convective heat

Keywords： entransy dissipation     heat convection     heat exchanger    

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Title Author Date Type Operation

Effect of variable heat capacities on performance of an irreversible Miller heat engine

Xingmei YE

Journal Article

Convective heat transfer in helical coils for constant-property and variable-property flows with high

Yufei MAO, Liejin GUO, Bofeng BAI, Ximin ZHANG

Journal Article

Heat transfer coefficient of wheel rim of large capacity steam turbines

SHI Jinyuan, DENG Zhicheng, YANG Yu, JUN Ganwen

Journal Article

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

Yang YANG, Jing LIU,

Journal Article

Will Germany move into a situation with unsecured power supply?

Harald SCHWARZ

Journal Article

Mechanical design, modeling, and identification for a novel antagonistic variable stiffness dexterous

Journal Article

A neural network-based production process modeling and variable importance analysis approach in corn

Journal Article

Novel Radiation-Adjustable Heating Terminal Based on Flat Heat Pipe Combined with Air Source Heat Pump

Yifan Wu,Hongli Sun,Mengfan Duan,Borong Lin,Hengxin Zhao,Chaohung Liu

Journal Article

On the improvement design of dynamic characteristics for the roller follower of a variable-speed plate

Hui Ching FAN, Hong Sen YAN

Journal Article

Mechanical design and analysis of a novel variable stiffness actuator with symmetrical pivot adjustment

Journal Article

Absorption heat pump for waste heat reuse: current states and future development

Zhenyuan XU, Ruzhu WANG

Journal Article

Performance design of a cryogenic air separation unit for variable working conditions using the lumped

Jinghua XU, Tiantian WANG, Qianyong CHEN, Shuyou ZHANG, Jianrong TAN

Journal Article

Effects of radiation and heat source/sink on unsteady MHD boundary layer flow and heat transfer over

Krishnendu Bhattacharyya

Journal Article

Heat-spreading analysis of a heat sink base embedded with a heat pipe

B. V. BORGMEYER, H. B. MA,

Journal Article

Application of entransy dissipation theory in heat convection

Mingtian XU, Jiangfeng GUO, Lin CHENG,

Journal Article