Performance optimization of thermionic refrigerators based on van der Waals heterostructures

Qiu, Susu; Ding, Zemin; Chen, Lingen; Ge, Yanlin

doi:10.1007/s11431-020-1749-9

Cited by 59 publications

(9 citation statements)

References 82 publications

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“…、经济系统 [34] 、热电装置 [93~95] 、广义流传递过程 [96] 、钢铁生产流程 [97] 等, 得到了一大批既具有理论意义又具有实际工程应用价值的研究成果, 其中有机朗肯循环 [82] 、卡琳娜循环 [83] 、有限势库化学泵 [84] 、内可逆广义机 [85] 、碘化氢反应器 [87] 、热离子制冷机 [92] 等研究工作是有限时间热力学理论的最新研究进展. 能的提升效果更为显著.…”

Section: 考虑到卡诺热机热效率最大时输出功率为零unclassified

Progress in theoretical study on constructal optimization of marine steam power plants

Chen¹,

Feng²,

Wu³

et al. 2021

Sci. Sin.-Tech.

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Section: 考虑到卡诺热机热效率最大时输出功率为零unclassified

Progress in theoretical study on constructal optimization of marine steam power plants

Chen¹,

Feng²,

Wu³

et al. 2021

Sci. Sin.-Tech.

Self Cite

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“…Finite time thermodynamics (FTT) [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 ] has been made significant progress in the research of thermal cycles and processes, including optimal configurations [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ] and optimal performances [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 ]. The FTT studies of internal combustion engine cycles mostly focus on the following factors [ 33 ]: the effects of different loss models such as heat transfer loss (HTL) [ 34 ], friction loss (FL) [ 35 ] and internal irreversibility loss (IIL) [ 36 ] on the performances of cycles; the effects of power output (

) and thermal efficiency (

) [ 37 ], efficient power (

) [ 38 ], ecological function (

) [ 39 ], power density (

) [ 40 ] and other ob...…”

Section: Introductionmentioning

confidence: 99%

Four-Objective Optimization for an Irreversible Porous Medium Cycle with Linear Variation in Working Fluid’s Specific Heat

Zang

Chen

et al. 2022

Entropy

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Considering that the specific heat of the working fluid varies linearly with its temperature, this paper applies finite time thermodynamic theory and NSGA-II to conduct thermodynamic analysis and multi-objective optimization for irreversible porous medium cycle. The effects of working fluid’s variable-specific heat characteristics, heat transfer, friction and internal irreversibility losses on cycle power density and ecological function characteristics are analyzed. The relationship between power density and ecological function versus compression ratio or thermal efficiency are obtained. When operating in the circumstances of maximum power density, the thermal efficiency of the porous medium cycle engine is higher and its size is less than when operating in the circumstances of maximum power output, and it is also more efficient when operating in the circumstances of maximum ecological function. The four objectives of dimensionless power density, dimensionless power output, thermal efficiency and dimensionless ecological function are optimized simultaneously, and the Pareto front with a set of solutions is obtained. The best results are obtained in two-objective optimization, targeting power output and thermal efficiency, which indicates that the optimal results of the multi-objective are better than that of one-objective.

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“…Since the 1970s, Finite Time Thermodynamics (FTT) has made great progress in physics and engineering fields [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 ]. Many scholars have researched the optimal performances of thermal and chemical processes and cycles [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. A great deal of work has been performed for the optimal configurations of thermal and chemical processes and cycles [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ], including heat transfer, mass transfer, heat and mass transfer, ...…”

Section: Introductionmentioning

confidence: 99%

Maximum Profit Output Configuration of Multi-Reservoir Resource Exchange Intermediary

Chen

Xia

2022

Entropy

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A model of a multi-reservoir resource exchange intermediary also defined as a commercial engine is proposed according to analogies and similarities between thermodynamics and economics. The optimal configuration of a multi-reservoir commercial engine with a maximum profit output objective is determined by applying optimal control theory. The optimal configuration consists of two instantaneous constant commodity flux processes and two constant price processes, and the configuration is independent of a number of economic subsystems and commodity transfer law qualitatively. The maximum profit output needs some economic subsystems to never contact with the commercial engine during commodity transfer processes. Numerical examples are provided for a three-economic-subsystem commercial engine with linear commodity transfer law. The effects of price changes of an intermediate economic subsystem on the optimal configuration of a three-economic-subsystem and the performance of optimal configuration are discussed. The research object is general, and the results can provide some theoretical guidelines for operations of actual economic processes and systems.

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Performance optimization of thermionic refrigerators based on van der Waals heterostructures

Cited by 59 publications

References 82 publications

Progress in theoretical study on constructal optimization of marine steam power plants

Progress in theoretical study on constructal optimization of marine steam power plants

Four-Objective Optimization for an Irreversible Porous Medium Cycle with Linear Variation in Working Fluid’s Specific Heat

Maximum Profit Output Configuration of Multi-Reservoir Resource Exchange Intermediary

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