Journal of Non-Equilibrium Thermodynamics最新文献_第10页

Variations on the models of Carnot irreversible thermomechanical engine 卡诺不可逆热力机械发动机模型的变体

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-04-08 DOI: 10.1515/jnet-2023-0109

Michel Feidt, Monica Costea

{"title":"Variations on the models of Carnot irreversible thermomechanical engine","authors":"Michel Feidt, Monica Costea","doi":"10.1515/jnet-2023-0109","DOIUrl":"https://doi.org/10.1515/jnet-2023-0109","url":null,"abstract":"The JETC Conference held in Salerno (June 12–17, 2023) was the opportunity to honor the two centuries anniversary of the booklet publication of Sadi Carnot. The paper reports on a selective review summarizing the evolution of the ideas and concepts proposed by Carnot. We consider mainly: a. The Carnot cycle relative to thermomechanical engine, b. The concept of efficiency (Carnot efficiency), c. The forms of energy (thermal energy or heat, Q, and mechanical energy or work, W), d. The concept of entropy, rediscovered and completed by Clausius. We show the importance of the energy conversion irreversibilities that started to be considered more recently by two methods, namely, the ratio method and the entropy production method. The second approach provides more significant results from a global point of view, also with more local modeling (cycle process modeling). Some examples are given that illustrate the proposal: Carnot cycle in endo-irreversible or exo-reversible configuration, Chambadal modeling, Curzon–Ahlborn modeling. More generally, the modeling is done in the frame of FTT (Finite Time Thermodynamics), FST (Finite Speed Thermodynamics), or FDOT (Finite physical Dimensions Optimal Thermodynamics). Preliminary conclusions and perspectives are proposed.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"1 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140538680","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Proposing a procedure for multi-objective optimization of cascade thermoelectric coolers to achieve maximum cooling capacity and COP 提出一种多目标优化级联热电冷却器的程序，以实现最大冷却能力和 COP

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-03-22 DOI: 10.1515/jnet-2023-0087

Amin Hadidi

{"title":"Proposing a procedure for multi-objective optimization of cascade thermoelectric coolers to achieve maximum cooling capacity and COP","authors":"Amin Hadidi","doi":"10.1515/jnet-2023-0087","DOIUrl":"https://doi.org/10.1515/jnet-2023-0087","url":null,"abstract":"A novel approach is proposed for optimal designing two-stage thermoelectric coolers using the biogeography-based optimization algorithm. For the comprehensiveness of the research, both types of two-stage coolers, including electrically serial and separated stages, have been investigated. Using the proposed procedure, first by selecting the most important performance parameters of the cooler, i.e. COP and the cooling capacity as objective functions, the efficiency and the validity of the approach are proved by comparing the results with results of the previous researchers. In all the examined cases, the proposed approach has led to the enhancing of the cooler performance. The results of single-objective optimization showed that using the proposed method, the cooling capacity and COP can be improved up to 17 % and 8.5 % compared to the previous designs, respectively. In the following, multi-objective optimization of thermoelectric coolers is conducted, taking into account both the objectives of the COP and the cooling capacity. Finally, Pareto optimal solutions and the exergetic efficiency of the optimized cooler were calculated for different values of the weight factor of the multi-objective function. The results of multi-objective optimization showed that by increasing the COP weight factor in the objective function, the exergetic efficiency of the refrigeration system enhances.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"32 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140192494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Poroacoustic front propagation under the linearized Eringen–Cattaneo–Christov–Straughan model 线性化 Eringen-Cattaneo-Christov-Straughan 模型下的咽腔声前传播

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-03-19 DOI: 10.1515/jnet-2023-0121

Vittorio Zampoli, Pedro M. Jordan

引用次数: 0

The wall effect in a plane counterflow channel 平面逆流水道中的壁面效应

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-03-19 DOI: 10.1515/jnet-2023-0123

Luca Galantucci, Michele Sciacca

引用次数: 0

Corrigendum to: Significance of entropy generation and the Coriolis force on the three-dimensional non-Darcy flow of ethylene-glycol conveying carbon nanotubes (SWCNTs and MWCNTs) 更正：熵产生和科里奥利力对输送碳纳米管（SWCNTs 和 MWCNTs）的乙烯-乙二醇三维非达西流动的意义

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-03-12 DOI: 10.1515/jnet-2023-0102

Ikram Ullah, Tasawar Hayat, Arsalan Aziz, Ahmed Alsaedi

{"title":"Corrigendum to: Significance of entropy generation and the Coriolis force on the three-dimensional non-Darcy flow of ethylene-glycol conveying carbon nanotubes (SWCNTs and MWCNTs)","authors":"Ikram Ullah, Tasawar Hayat, Arsalan Aziz, Ahmed Alsaedi","doi":"10.1515/jnet-2023-0102","DOIUrl":"https://doi.org/10.1515/jnet-2023-0102","url":null,"abstract":"This corrigendum addresses some typographical mistakes and errors in published article “Significance of entropy generation and the Coriolis force on the three-dimensional non-Darcy flow of ethylene-glycol conveying carbon nanotubes (SWCNTs and MWCNTs)”. Corrections about some typographical errors and plots of <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" overflow=\"scroll\"> <m:mi>g</m:mi> <m:mfenced close=\")\" open=\"(\"> <m:mrow> <m:mi>η</m:mi> </m:mrow> </m:mfenced> </m:math> $gleft(eta right)$ satisfying ambient condition in study (I. Ullah, T. Hayat, A. Aziz, and A. Alsaedi, “Significance of entropy generation and the coriolis force on the three-dimensional non-Darcy flow of ethylene-glycol conveying carbon nanotubes (SWCNTs and MWCNTs),” J. Non-Equilibrium Thermodyn., vol. 47, pp. 61–75, 2022) are presented here.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"14 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140115307","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the dynamic thermal conductivity and diffusivity observed in heat pulse experiments 热脉冲实验中观察到的动态热导率和扩散率

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-03-11 DOI: 10.1515/jnet-2023-0119

Anna Fehér, Róbert Kovács

引用次数: 0

Optimization analysis of an endoreversible quantum heat engine with efficient power function 具有高效功率函数的内可逆量子热机的优化分析

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-02-14 DOI: 10.1515/jnet-2023-0082

Kirandeep Kaur, Anmol Jain, Love Sahajbir Singh, Rakesh Singla, Shishram Rebari

{"title":"Optimization analysis of an endoreversible quantum heat engine with efficient power function","authors":"Kirandeep Kaur, Anmol Jain, Love Sahajbir Singh, Rakesh Singla, Shishram Rebari","doi":"10.1515/jnet-2023-0082","DOIUrl":"https://doi.org/10.1515/jnet-2023-0082","url":null,"abstract":"We study the optimal performance of an endoreversible quantum dot heat engine, in which the heat transfer between the system and baths is mediated by qubits, operating under the conditions of a trade-off objective function known as the maximum efficient power function defined by the product of power and efficiency of the engine. First, we numerically study the optimization of the efficient power function for the engine under consideration. Then, we obtain some analytic results by applying a high-temperature limit and compare the performance of the engine at maximum efficient power function to the engine operating in the maximum power regime. We find that the engine operating at maximum efficient power function produces at least 88.89 % of the maximum power output while at the same time reducing the power loss due to entropy production by a considerable amount. We conclude by studying the stochastic simulations of the efficiency of the engine in maximum power and maximum efficient power regime. We find that the engine operating at maximum power is subjected to fewer power fluctuations as compared to the one operating at maximum efficient power function.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"184 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139739500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling equilibrium and non-equilibrium thermophysical properties of liquid lubricants using semi-empirical approaches and neural network 利用半经验方法和神经网络模拟液体润滑剂的平衡和非平衡热物理性质

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-02-08 DOI: 10.1515/jnet-2023-0062

Sayed Mostafa Hosseini, Taleb Zarei, Mariano Pierantozzi

{"title":"Modeling equilibrium and non-equilibrium thermophysical properties of liquid lubricants using semi-empirical approaches and neural network","authors":"Sayed Mostafa Hosseini, Taleb Zarei, Mariano Pierantozzi","doi":"10.1515/jnet-2023-0062","DOIUrl":"https://doi.org/10.1515/jnet-2023-0062","url":null,"abstract":"This study explored the capability of semi-empirical and neural network approaches for correlating and predicting some equilibrium and non-equilibrium thermophysical properties of liquid lubricants. The equilibrium properties, including the densities and several thermodynamic coefficients for 12 liquid lubricants, were correlated and predicted through a perturbed hard-chain equation of state (PHC EoS) by an attractive term of Yukawa tail. The molecular parameters of PHC EoS were obtained by correlating them with 935 data points for the densities and isothermal compressibilities of studied systems in the 278–353 K range and pressure up to 70 MPa with the average absolute relative deviations (AARDs) of 0.36 % and 5.25 %, respectively. Then, that EoS was employed to predict the densities of other literature sources (with an AARD of 0.81 %) along with several thermodynamic coefficients, including isobaric expansivities (with an AARD of 12.92 %), thermal pressure coefficients (with the AARD of 12.93 %), and internal pressure (with the AARD of 13.67 %), for which the reference values were obtained from Tait-type equations and available in literature. Apart from the equilibrium mentioned above properties, the PHC EoS was combined with a rough hard-sphere-chain (RHSC) model to correlate and predict the 548 data points for the viscosities of 7 selected liquefied lubricants in 283–353 K range and pressures up to 100 MPa with the AARD of 11.85 %. The accuracy of the results from the RHSC-based model has also been compared with an empirical PηT equation of Tammann-Tait type and an artificial neural network (ANN), both of which were developed in this work. The ANN of one hidden layer and 13 neurons was trained using the back-propagation algorithm. The results acquired from this approach were very promising and demonstrated the potential of the ANN approach for predicting the viscosity of lubricants, reaching an AARD of 0.81 % for the entire dataset.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"34 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139710707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrodynamic, electronic and optic analogies with heat transport in extended thermodynamics 扩展热力学中的流体力学、电子学和光学与热传输的类比

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-01-26 DOI: 10.1515/jnet-2023-0096

Vito Antonio Cimmelli, David Jou, Antonio Sellitto

引用次数: 0

Thermodynamic costs of temperature stabilization in logically irreversible computation 逻辑不可逆计算中温度稳定的热力学成本

IF 6.6 3区工程技术

Journal of Non-Equilibrium Thermodynamics Pub Date : 2024-01-26 DOI: 10.1515/jnet-2023-0099

Shu-Nan Li, Bing-Yang Cao

{"title":"Thermodynamic costs of temperature stabilization in logically irreversible computation","authors":"Shu-Nan Li, Bing-Yang Cao","doi":"10.1515/jnet-2023-0099","DOIUrl":"https://doi.org/10.1515/jnet-2023-0099","url":null,"abstract":"In recent years, great efforts are devoted to reducing the work cost of the bit operation, but it is still unclear whether these efforts are sufficient for resolving the temperature stabilization problem in computation. By combining information thermodynamics and a generalized constitutive model which can describe Fourier heat conduction as well as non-Fourier heat transport with nonlocal effects, we here unveil two types of the thermodynamic costs in the temperature stabilization problem. Each type imposes an upper bound on the amount of bits operated per unit time per unit volume, which will eventually limit the speed of the bit operation. The first type arises from the first and second laws of thermodynamics, which is independent of the boundary condition and can be circumvented in Fourier heat conduction. The other type is traceable to the third law of thermodynamics, which will vary with the boundary condition and is ineluctable in Fourier heat conduction. These thermodynamic costs show that reducing the work cost of the bit operation is insufficient for resolving the temperature stabilization problem in computation unless the work cost vanishes.","PeriodicalId":16428,"journal":{"name":"Journal of Non-Equilibrium Thermodynamics","volume":"34 1","pages":""},"PeriodicalIF":6.6,"publicationDate":"2024-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139567837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0