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学者姓名：杨涵新
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Abstract ：
High temperature proton exchange membrane fuel cell is one of the prominent power generators without consuming fossil fuels. Meanwhile, absorption carbon capture system plays an important role in carbon emission reduction. In this paper, by integrating these two systems, we propose a novel hybrid system to achieve improved hydrogen utilization efficiency and negative carbon emission. Considering the electrochemical and thermodynamic irreversible losses involved, as well as the matching between the two subsystems, the power density and efficiency for each subsystem and the overall system are derived analytically. The optimal performance and operation of the hybrid system are analyzed and discussed. Notably, compared to the standalone high temperature proton exchange membrane fuel cell, the maximum power density of the hybrid system increases by 24.0% and reaches 3933 W.m(-2) for the given parameter values, and the corresponding efficiency rises from 20.9% to 23.1%. Additionally, the impacts of key parameters are investigated, which indicates the important role of the absorbent with appropriate mass to heat transfer coefficient ratio in performance enhancement. In the end, the performance comparisons with various hybrid systems based on high temperature proton exchange membrane fuel cell are presented. The outcomes show that the advanced absorbents with higher operating temperature lead to competitive performance of the proposed hybrid system.
Keyword ：
Absorption carbon capture system Absorption carbon capture system Fuel cell Fuel cell High temperature proton exchange membrane High temperature proton exchange membrane Negative carbon emission Negative carbon emission Performance enhancement Performance enhancement Waste heat utilization Waste heat utilization
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| GB/T 7714 | Tan, Chaohuan , Cheng, Linhao , Peng, Wanli et al. Negative carbon emission power generator: A combination of high temperature proton exchange membrane fuel cell and absorption carbon capture system [J]. | JOURNAL OF CLEANER PRODUCTION , 2025 , 489 . |
| MLA | Tan, Chaohuan et al. "Negative carbon emission power generator: A combination of high temperature proton exchange membrane fuel cell and absorption carbon capture system" . | JOURNAL OF CLEANER PRODUCTION 489 (2025) . |
| APA | Tan, Chaohuan , Cheng, Linhao , Peng, Wanli , Yang, Hanxin , Luo, Rongxiang , Guo, Juncheng . Negative carbon emission power generator: A combination of high temperature proton exchange membrane fuel cell and absorption carbon capture system . | JOURNAL OF CLEANER PRODUCTION , 2025 , 489 . |
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Low-grade thermal energy utilization plays an important role in addressing escalating energy demand and environmental challenges. However, primary low-grade thermal energy harvesting technologies are currently only capable of their own single and fixed energy conversion and transport modes, which limits their further application. To break this bottleneck, we innovatively propose an electrochemical energy converter (EEC(s)) cycle model, which consists of three isothermal processes and three open-circuit heating (or cooling) processes and operates between three heat reservoirs. Notably, the proposed EEC(s) integrates and enables flexible switching of thermal-to-electricity and thermal-to-refrigeration harvesting strategies. Moreover, the complementary roles of thermal energy and electricity are enabled to meet different levels of cooling demand. Significantly, its extraordinary thermal-to-refrigeration conversion efficiency and great potential as an alternative to conventional thermally driven refrigerators are emphasized. Specifically, when the EEC(s) operates at maximum cooling power density, a thermal-to-refrigeration conversion performance coefficient of 0.498 and a Carnotrelative efficiency of 32.3% are predicted for the given operating temperatures. Additionally, the different roles of the cell parameters in enhancing the EECs performance are specified. This work demonstrates the feasibility of integrating multiple energy conversion and transport modes into a novel electrochemical cycle configuration and provides a promising solution for efficient and comprehensive low-grade thermal energy utilizations.
Keyword ：
Combined thermal and power driving mode Combined thermal and power driving mode Electrochemical energy converter Electrochemical energy converter Low-grade thermal energy utilization Low-grade thermal energy utilization Thermal-to-electricity conversion Thermal-to-electricity conversion Thermal-to-refrigeration conversion Thermal-to-refrigeration conversion
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| GB/T 7714 | Chen, Bo , Chen, Yangfeng , Yang, Hanxin et al. An electrochemical energy converter integrating multiple energy conversion and transport modes [J]. | ENERGY CONVERSION AND MANAGEMENT , 2025 , 327 . |
| MLA | Chen, Bo et al. "An electrochemical energy converter integrating multiple energy conversion and transport modes" . | ENERGY CONVERSION AND MANAGEMENT 327 (2025) . |
| APA | Chen, Bo , Chen, Yangfeng , Yang, Hanxin , Luo, Rongxiang , Gonzalez-Ayala, Julian , Hernandez, A. Calvo et al. An electrochemical energy converter integrating multiple energy conversion and transport modes . | ENERGY CONVERSION AND MANAGEMENT , 2025 , 327 . |
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Absorption carbon capture is currently the most commercialized technology and deemed as the vital solution to balance continued use of fossil fuels and carbon emission reduction. Nevertheless, its high energy cost remains the major concern for wide-scale application. Consequently, it is of great significance to address this issue by analyzing the underlying energy conversion mechanism, answering the pivotal question 'What characteristics lead to a superior absorbent?', and developing more efficient absorbent. In this paper, an irreversible decoupling model of absorption carbon capture system, consisting of a heat engine and a chemical pump, is innovatively established. Accordingly, key performance indicators are analytically derived and the optimal operation strategies of the system are explicitly determined. Notably, the matching of two subsystems leads to a novel insight into the heat and mass transfer interaction of absorbent, according to which the simulated results and the question concerning the best absorbent are thermodynamically interpreted and addressed, respectively. Additionally, the comparisons between the calculated optimal energy conversion efficiencies with experimental and simulated results are presented and discussed. Our findings may indicate the efficient pathway for developing advanced absorbent and provide instructing information for the design and operation of practical carbon capture systems. © 2024
Keyword ：
Absorption Absorption Benchmarking Benchmarking Carbon capture Carbon capture Emission control Emission control Energy conversion efficiency Energy conversion efficiency Fossil fuels Fossil fuels Mass transfer Mass transfer
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| GB/T 7714 | Guo, Juncheng , Tan, Chaohuan , Li, Zhexu et al. New insights into energy conversion mechanism, optimal absorbent selection criteria, and operation strategies of absorption carbon capture systems [J]. | Energy , 2024 , 304 . |
| MLA | Guo, Juncheng et al. "New insights into energy conversion mechanism, optimal absorbent selection criteria, and operation strategies of absorption carbon capture systems" . | Energy 304 (2024) . |
| APA | Guo, Juncheng , Tan, Chaohuan , Li, Zhexu , Chen, Bo , Yang, Hanxin , Luo, Rongxiang et al. New insights into energy conversion mechanism, optimal absorbent selection criteria, and operation strategies of absorption carbon capture systems . | Energy , 2024 , 304 . |
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Abstract ：
Absorption carbon capture is currently the most commercialized technology and deemed as the vital solution to balance continued use of fossil fuels and carbon emission reduction. Nevertheless, its high energy cost remains the major concern for wide-scale application. Consequently, it is of great significance to address this issue by analyzing the underlying energy conversion mechanism, answering the pivotal question "What characteristics lead to a superior absorbent?", and developing more efficient absorbent. In this paper, an irreversible decoupling model of absorption carbon capture system, consisting of a heat engine and a chemical pump, is innovatively established. Accordingly, key performance indicators are analytically derived and the optimal operation strategies of the system are explicitly determined. Notably, the matching of two subsystems leads to a novel insight into the heat and mass transfer interaction of absorbent, according to which the simulated results and the question concerning the best absorbent are thermodynamically interpreted and addressed, respectively. Additionally, the comparisons between the calculated optimal energy conversion efficiencies with experimental and simulated results are presented and discussed. Our findings may indicate the efficient pathway for developing advanced absorbent and provide instructing information for the design and operation of practical carbon capture systems.
Keyword ：
Absorbent selection criteria Absorbent selection criteria Absorption carbon capture Absorption carbon capture Carbon capture rate Carbon capture rate Energy conversion efficiency Energy conversion efficiency Thermodynamic decoupling model Thermodynamic decoupling model
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| GB/T 7714 | Guo, Juncheng , Tan, Chaohuan , Li, Zhexu et al. New insights into energy conversion mechanism, optimal absorbent selection criteria, and operation strategies of absorption carbon capture systems [J]. | ENERGY , 2024 , 304 . |
| MLA | Guo, Juncheng et al. "New insights into energy conversion mechanism, optimal absorbent selection criteria, and operation strategies of absorption carbon capture systems" . | ENERGY 304 (2024) . |
| APA | Guo, Juncheng , Tan, Chaohuan , Li, Zhexu , Chen, Bo , Yang, Hanxin , Luo, Rongxiang et al. New insights into energy conversion mechanism, optimal absorbent selection criteria, and operation strategies of absorption carbon capture systems . | ENERGY , 2024 , 304 . |
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Despite a large number of studies on collective motion, individuals are usually assumed to participate in flocking unconditionally, and the cost of communication with other in-dividuals is rarely considered . In fact, individuals often need to face a dichotomous sce-nario: choosing to move together with others and pay the communication cost, or choos-ing to walk alone and have no communication cost. In this paper, a modified Vicsek model is proposed, in which agents have different kinds of moving patterns depending on the strategies taken by them. Each individual obtains a payoff based on the benefit of the col-lective motion and the cost of communication with neighbors. Individuals update their strategies according to the evolutionary game theory. It is found that not only cooperation can be maintained, but also the highest synchronization level can be achieved at an op-timal value of communication radius. The influence of other pertinent quantities such as the random noise, the relative cost, and the density of agents have also been investigated in detail.(c) 2022 Elsevier Inc. All rights reserved.
Keyword ：
Collective motion Collective motion Communication cost Communication cost Evolutionary game theory Evolutionary game theory Vicsek model Vicsek model
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| GB/T 7714 | You, Feng , Yang, Han-Xin , Li, Yumeng et al. A modified Vicsek model based on the evolutionary game [J]. | APPLIED MATHEMATICS AND COMPUTATION , 2023 , 438 . |
| MLA | You, Feng et al. "A modified Vicsek model based on the evolutionary game" . | APPLIED MATHEMATICS AND COMPUTATION 438 (2023) . |
| APA | You, Feng , Yang, Han-Xin , Li, Yumeng , Du, Wenbo , Wang, Gang . A modified Vicsek model based on the evolutionary game . | APPLIED MATHEMATICS AND COMPUTATION , 2023 , 438 . |
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Heat transformers, also referred to as temperature boosters, draw considerable attention for the great potential in exploiting low-grade thermal energy. In this paper, a generic model of three-terminal heat transformer without reference to any specific heat-transfer law is established on the basis of the low-dissipation assumption. Accordingly, the optimum behaviors and parametric choices under two different parameter constraints are investigated and compared. Notably, the connection between overall time constraint and the presence of external heat leak for the three-terminal heat transformer is revealed. In addition, the Omega function based on the trade -off consideration is introduced to provide more practical evaluations. The performances of the three-terminal heat transformer operated at maximum Omega regime are derived and found to be less powerful but more efficient comparing with the associated maximum heating load regime. Moreover, the influences of dissipation symmetry on several key performance indicators are elaborated by using numerical calculation, which leads to the important results of the present paper, namely the performance bounds of coefficient of performance (COP) at maximum heating load and maximum Omega regimes. Finally, the reported COPs from previous researches are collected to illustrate the validity and practical significance of the proposed model and associated perfor-mance bounds.
Keyword ：
Dissipation symmetry Dissipation symmetry Parameter constraints Parameter constraints Performance bounds Performance bounds Three-terminal heat transformer Three-terminal heat transformer Trade-off function Trade-off function
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| GB/T 7714 | Cao, Haibo , Li, Zhexu , Peng, Wanli et al. Optimal analyses and performance bounds of the low-dissipation three-terminal heat transformer: The roles of the parameter constraints and optimization criteria [J]. | ENERGY , 2023 , 277 . |
| MLA | Cao, Haibo et al. "Optimal analyses and performance bounds of the low-dissipation three-terminal heat transformer: The roles of the parameter constraints and optimization criteria" . | ENERGY 277 (2023) . |
| APA | Cao, Haibo , Li, Zhexu , Peng, Wanli , Yang, Hanxin , Guo, Juncheng . Optimal analyses and performance bounds of the low-dissipation three-terminal heat transformer: The roles of the parameter constraints and optimization criteria . | ENERGY , 2023 , 277 . |
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The extraordinary thermal-to-electricity conversion efficiency of thermally regenerative electrochemical cycle triggers interest in its reverse counterpart, namely thermally regenerative electrochemical refrigerator (TRER), a promising alternative to conventional cooling devices. Nevertheless, due to three fundamental obstacles, the practically feasible TRER model is still absent, which hinders the development of follow-up research. To break this bottleneck, heating by discharging and cooling by charging effects are innovatively utilized to construct TRER models where the electrochemical counterparts of traditional adiabatic compression and expansion processes, namely adiabatic pre-charging and pre-discharging processes, are proposed and introduced. Significantly, the maximum coefficient of performance (COP) and the COP at maximum cooling power are predicted to achieve up to 40% and 5% of Carnot COP, respectively for the given values of parameters. Moreover, the great potential for efficient refrigeration is highlighted by comparing the obtained results with various refrigeration systems. This work lays the foundation for further experimental investigations and opens a new avenue for constructing other novel electrochemical cycles.
Keyword ：
Adiabatic pre-charging process Adiabatic pre-charging process Adiabatic pre-discharging process Adiabatic pre-discharging process Cooling by charging Cooling by charging Electrochemical counterpart Electrochemical counterpart Heating by discharging Heating by discharging Thermally regenerative electrochemical refrigerator Thermally regenerative electrochemical refrigerator
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| GB/T 7714 | Chen, Bo , Gonzalez-Ayala, Julian , Hernandez, A. Calvo et al. A novel electrochemical system with adiabatic pre-charging and pre-discharging processes for efficient refrigeration [J]. | ENERGY CONVERSION AND MANAGEMENT , 2023 , 293 . |
| MLA | Chen, Bo et al. "A novel electrochemical system with adiabatic pre-charging and pre-discharging processes for efficient refrigeration" . | ENERGY CONVERSION AND MANAGEMENT 293 (2023) . |
| APA | Chen, Bo , Gonzalez-Ayala, Julian , Hernandez, A. Calvo , Luo, Rongxiang , Yang, Hanxin , Guo, Juncheng . A novel electrochemical system with adiabatic pre-charging and pre-discharging processes for efficient refrigeration . | ENERGY CONVERSION AND MANAGEMENT , 2023 , 293 . |
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Results show that the astrocytes can not only listen to the talk of large assemble of neurons but also give advice to the conversations and are significant sources of heterogeneous couplings as well. In the present work, we focus on such regulation character of astrocytes and explore the role of heterogeneous couplings among interacted neuron-astrocyte components in a signal response. We consider reduced dynamics in which the listening and advising processes of astrocytes are mapped into the form of group coupling, where the couplings are normally distributed. In both globally coupled overdamped bistable oscillators and an excitable FitzHugh-Nagumo (FHN) neuron model, we numerically and analytically demonstrate that two types of bell-shaped collective response curves can be obtained as the ensemble coupling strength or the heterogeneity of group coupling rise, respectively, which can be seen as a new type of double resonance. Furthermore, through the bifurcation analysis, we verify that these resonant signal responses stem from the competition between dispersion and aggregation induced by heterogeneous group and positive pairwise couplings, respectively. Our results contribute to a better understanding of the signal propagation in coupled systems with quenched disorder.
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| GB/T 7714 | Liu, Cong , Wu, Zhi-Xi , Wang, Chong-Yang et al. Double resonance induced by group coupling with quenched disorder [J]. | CHAOS , 2023 , 33 (1) . |
| MLA | Liu, Cong et al. "Double resonance induced by group coupling with quenched disorder" . | CHAOS 33 . 1 (2023) . |
| APA | Liu, Cong , Wu, Zhi-Xi , Wang, Chong-Yang , Yang, Han-Xin , Guan, Jian-Yue . Double resonance induced by group coupling with quenched disorder . | CHAOS , 2023 , 33 (1) . |
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In the present paper, a general non-combined model of three-terminal refrigerator beyond specific heat transfer mechanisms is established based on the low-dissipation assumption. The relation between the optimized cooling power and the corresponding coefficient of performance (COP) is analytically derived, according to which the COP at maximum cooling power (CMP) can be further determined. At two dissipation asymmetry limits, upper and lower bounds of CMP are obtained and found to be in good agreement with experimental and simulated results. Additionally, comparison of the obtained bounds with previous combined model is presented. In particular it is found that the upper bounds are the same, whereas the lower bounds are quite different. This feature indicates that the claimed universal equivalence for the combined and non-combined models under endoreversible assumption is invalid within the frame of low-dissipation assumption. Then, the equivalence between various finite-time thermodynamic models needs to be reevaluated regarding multi-terminal systems. Moreover, the correlation between the combined and non-combined models is further revealed by the derivation of the equivalent condition according to which the identical upper bounds and distinct lower bounds are theoretically shown. Finally, the proposed non-combined model is proved to be the appropriate model for describing various types of thermally driven refrigerator. This work may provide some instructive information for the further establishments and performance analyses of multi-terminal low-dissipation models.
Keyword ：
comparative analyses comparative analyses finite-time cycle finite-time cycle low-dissipation model low-dissipation model performance bounds performance bounds three-terminal refrigerator three-terminal refrigerator
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| GB/T 7714 | Li, Zhexu , Gonzalez-Ayala, Julian , Yang, Hanxin et al. Low-dissipation model of three-terminal refrigerator: performance bounds and comparative analyses [J]. | JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL , 2022 , 55 (6) . |
| MLA | Li, Zhexu et al. "Low-dissipation model of three-terminal refrigerator: performance bounds and comparative analyses" . | JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL 55 . 6 (2022) . |
| APA | Li, Zhexu , Gonzalez-Ayala, Julian , Yang, Hanxin , Guo, Juncheng , Hernandez, A. Calvo . Low-dissipation model of three-terminal refrigerator: performance bounds and comparative analyses . | JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL , 2022 , 55 (6) . |
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Education is not only a guarantee of personal knowledge, but also a topic of national importance. In this paper, we analyzed the scientific papers published by authors from China and the United States in 239 educational journals over a period of 20 years (2000-2019). We first extracted the topic of each paper via the Latent Dirichlet allocation model, which demonstrated significant differences in specific sub-fields between both countries. Next, we constructed two networks of scientific collaboration among the educators of each country. By analyzing these networks' topological properties, we show both countries' differences and common features. Regarding individuals, Chinese educators collaborate widely, whereas American educators are more likely to collaborate in certain groups. Regarding groups, there exists an optimal team size for producing highly popular papers in both countries. (C) 2021 Published by Elsevier B.V.
Keyword ：
Collaboration networks Collaboration networks Education science Education science The science of science The science of science Topic modeling Topic modeling
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| GB/T 7714 | Chen, Shenwen , Ren, Siqiao , Zheng, Lei et al. A comparison study of educational scientific collaboration in China and the USA [J]. | PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS , 2022 , 585 . |
| MLA | Chen, Shenwen et al. "A comparison study of educational scientific collaboration in China and the USA" . | PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 585 (2022) . |
| APA | Chen, Shenwen , Ren, Siqiao , Zheng, Lei , Yang, Hanxin , Du, Wenbo , Cao, Xianbin . A comparison study of educational scientific collaboration in China and the USA . | PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS , 2022 , 585 . |
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