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学者姓名：罗荣祥
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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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The negative differential thermal resistance (NDTR) effect refers to a phenomenon that may take place ina heat transport system where the heat current counterintuitively decreases as the temperature differencebetween heat baths increases. Understanding and controlling the NDTR properties of out-of-equilibrium systemsand using them to design new functional thermal devices are the major challenges of modern science andtechnology, which has important theoretical significance and application prospects. Up to now, the variouslattice models representing solid materials have been taken to study the NDTR properties, but the fluid modelshave not received enough attention. It has recently been shown that in one-dimensional hard-point gas modelsrepresenting fluids, there is a mechanism for NDTR induced by heat baths. The mechanism for NDTR in such asystem depends on the simple fact that decreasing the temperature of the cold bath can weaken the motion ofparticles and decrease the collision rate between particles and the hot bath, thus impeding thermal exchangebetween the cold and hot baths. In this paper, we study how this mechanism works in more general two-dimensional gas models described by multi-particle collision dynamics. The gas models we consider are in afinite rectangular region of two-dimensional space with each end in contact with a heat bath. Based on theanalytical results and numerical simulations, we show that the mechanism underlying NDTR induced by heatbaths is also in effect for two-dimensional gas models and is applicable for describing systems with small sizesand weak interactions. Our result, together with that previously obtained in one-dimensional gas models,provides strong evidence that gas systems can exhibit NDTR by decreasing the temperature of the heat bath,which sheds new light on the exploring direction for developing various fluidic thermal control devices
Keyword ：
gas model gas model multi-particle collision multi-particle collision negative differential thermal resistance negative differential thermal resistance transport transport
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| GB/T 7714 | Huang, Li -Sheng , Luo, Rong -Xiang . Negative differential thermal resistance in atwo-dimensional gas model br [J]. | ACTA PHYSICA SINICA , 2023 , 72 (1) . |
| MLA | Huang, Li -Sheng et al. "Negative differential thermal resistance in atwo-dimensional gas model br" . | ACTA PHYSICA SINICA 72 . 1 (2023) . |
| APA | Huang, Li -Sheng , Luo, Rong -Xiang . Negative differential thermal resistance in atwo-dimensional gas model br . | ACTA PHYSICA SINICA , 2023 , 72 (1) . |
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Abstract ：
负微分热阻效应是指在一个热输运系统中增大热流驱动力热流反倒减小的现象.理解和控制非平衡热输运系统中的负微分热阻效应,并利用其设计制造新功能热器件是科学技术的前沿挑战,有着重要的理论意义和应用前景.相对晶格模型中的负微分热阻研究而言,流体模型中的负微分热阻性质还亟待认知.本文选用由多粒子碰撞动力学描述的二维气体模型为研究对象,理论证明了热库对气体粒子运动的约束是诱导负微分热阻的一个新机制,并通过非平衡分子动力学方法揭示了该机制仅适用于弱相互作用的小尺寸系统.这些结果为气体模型能表现出负微分热阻现象提供了微观机制的支持,同时也为开发新的应用提供了新思路.
Keyword ：
多粒子碰撞 多粒子碰撞 气体模型 气体模型 负微分热阻 负微分热阻 输运 输运
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| GB/T 7714 | 黄礼胜 , 罗荣祥 . 二维气体模型中的负微分热阻 [J]. | 物理学报 , 2023 , 72 (1) : 29-35 . |
| MLA | 黄礼胜 et al. "二维气体模型中的负微分热阻" . | 物理学报 72 . 1 (2023) : 29-35 . |
| APA | 黄礼胜 , 罗荣祥 . 二维气体模型中的负微分热阻 . | 物理学报 , 2023 , 72 (1) , 29-35 . |
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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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Abstract ：
The negative differential thermal resistance (NDTR) effect refers to a phenomenon that may take place ina heat transport system where the heat current counterintuitively decreases as the temperature differencebetween heat baths increases. Understanding and controlling the NDTR properties of out-of-equilibrium systemsand using them to design new functional thermal devices are the major challenges of modern science andtechnology, which has important theoretical significance and application prospects. Up to now, the variouslattice models representing solid materials have been taken to study the NDTR properties, but the fluid modelshave not received enough attention. It has recently been shown that in one-dimensional hard-point gas modelsrepresenting fluids, there is a mechanism for NDTR induced by heat baths. The mechanism for NDTR in such asystem depends on the simple fact that decreasing the temperature of the cold bath can weaken the motion ofparticles and decrease the collision rate between particles and the hot bath, thus impeding thermal exchangebetween the cold and hot baths. In this paper, we study how this mechanism works in more general two-dimensional gas models described by multi-particle collision dynamics. The gas models we consider are in afinite rectangular region of two-dimensional space with each end in contact with a heat bath. Based on theanalytical results and numerical simulations, we show that the mechanism underlying NDTR induced by heatbaths is also in effect for two-dimensional gas models and is applicable for describing systems with small sizesand weak interactions. Our result, together with that previously obtained in one-dimensional gas models,provides strong evidence that gas systems can exhibit NDTR by decreasing the temperature of the heat bath,which sheds new light on the exploring direction for developing various fluidic thermal control devices
Keyword ：
gas model gas model multi-particle collision multi-particle collision negative differential thermal resistance negative differential thermal resistance transport transport
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| GB/T 7714 | Huang, Li-Sheng , Luo, Rong-Xiang . Negative differential thermal resistance in a two-dimensional gas model br [J]. | ACTA PHYSICA SINICA , 2023 , 72 (1) . |
| MLA | Huang, Li-Sheng et al. "Negative differential thermal resistance in a two-dimensional gas model br" . | ACTA PHYSICA SINICA 72 . 1 (2023) . |
| APA | Huang, Li-Sheng , Luo, Rong-Xiang . Negative differential thermal resistance in a two-dimensional gas model br . | ACTA PHYSICA SINICA , 2023 , 72 (1) . |
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基于固体物理课程教学的现状,从"心流"理论所倡导的教育观出发,提出将"心流"理论引入到固体物理课程教学中,通过线上线下混合、翻转课堂和研究式学习,引导学生在学习过程中进入"心流"状态,从而使学生在学习过程中体验成长、享受成长.通过"心流"体验使学生感受到学习的乐趣,使学生从被动的接收知识变成主动的探索知识,实现最优的教学效果.通过实证分析证实"心流"理论在教学实践中取得了显著效果.
Keyword ：
固体物理 固体物理 心流 心流 研究式学习 研究式学习 线上线下混合教学 线上线下混合教学 翻转课堂 翻转课堂
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| GB/T 7714 | 俞金玲 , 邓辉 , 罗荣祥 . 基于"心流"理论的固体物理课程教学改革 [J]. | 高师理科学刊 , 2023 , 43 (2) : 94-97,101 . |
| MLA | 俞金玲 et al. "基于"心流"理论的固体物理课程教学改革" . | 高师理科学刊 43 . 2 (2023) : 94-97,101 . |
| APA | 俞金玲 , 邓辉 , 罗荣祥 . 基于"心流"理论的固体物理课程教学改革 . | 高师理科学刊 , 2023 , 43 (2) , 94-97,101 . |
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Abstract ：
It has recently been shown that in one-dimensional hard-point gases, there is a mechanism that induces negative differential thermal resistance (NDTR) between heat baths. We examine this mechanism in more general higher-dimensional fluids described by multiparticle collision dynamics. We consider fluids in a finite cuboid region of three-dimensional space with each end in contact with a heat bath. Based on analytical results and numerical models, we find that the mechanism underlying NDTR also works for high-dimensional fluidic systems with weak interactions and is very robust to mixed fluids. Our results significantly advance knowledge of NDTR induced by heat baths and illuminate different directions to explore in fabricating fluid thermal transistors in micro- and nanosystems. © 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Keyword ：
Heat resistance Heat resistance
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| GB/T 7714 | Luo, Rongxiang , Guo, Juncheng , Zhang, Jun et al. Negative differential thermal resistance of fluids induced by heat baths [J]. | Physical Review Research , 2022 , 4 (4) . |
| MLA | Luo, Rongxiang et al. "Negative differential thermal resistance of fluids induced by heat baths" . | Physical Review Research 4 . 4 (2022) . |
| APA | Luo, Rongxiang , Guo, Juncheng , Zhang, Jun , Yang, Hanxin . Negative differential thermal resistance of fluids induced by heat baths . | Physical Review Research , 2022 , 4 (4) . |
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