Article
Chemistry, Physical
Xinxin Deng, Yitian Xiao, Qibin Li, Chao He, Shukun Wang
Summary: The molecular dynamics simulation study of the evaporation behaviors of R1234yf, R1234ze(E), and R1234ze(Z) liquid films on a solid surface revealed that R1234yf had the highest evaporation rate and heat flux in the steady state. However, the total thermal resistance of R1234ze(Z) was greater than that of R1234ze(E) and R1234yf. The difference in total thermal resistance was mainly attributed to the large difference in evaporation resistance at the liquid-vapor interface.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Shizhen Li, Yingxin Liu, Yanjun Liu, Jingzhi Zhang
Summary: The study investigated the performance of environmentally friendly refrigerants R1234yf and R1234ze(E) as alternatives to R134a in an ejector refrigeration system. Results showed that R1234yf had a higher entrainment ratio compared to R134a and R1234ze(E), but its shocking position was closer to the upstream. Heat transfer inside the ejector showed similar trends with the three working fluids.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Thermodynamics
Gennaro Criscuolo, Wiebke Brix Markussen, Knud Erik Meyer, Martin Ryhl Kaern
Summary: This study investigated the flow boiling heat transfer of refrigerants in narrow channels and analyzed the effect of heat flux on the heat transfer behavior and flow patterns. The results showed the existence of different boiling regimes and flow patterns in the channels, and the influence of heat flux on the two-phase local heat transfer coefficient varied in these regimes.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Waldemar Kuczynski, Henryk Charun, Piotr Piatkowski, Blazej Balasz, Katarzyna Chliszcz
Summary: This article proposes a regressive model describing dynamic pressure and temperature impulsive instabilities during condensation of R134a refrigerant and isomers R1234yf and R1234ze(E) in minichannels, with verification against experimental results, showing a satisfactory compliance of +/- 25%. The model development involved dimensionless analysis using Buckingham's Pi theorem to obtain the dependence on dimensionless values of the propagation velocities of pressure and temperature instabilities.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Xiaoxian Yang, Hangtao Liu, Shi Hai Chen, Dongchan Kim, Fufang Yang, Arash Arami-Niya, Yuanyuan Duan
Summary: The authors conducted viscosity measurements of six binary mixtures of R32 + R1234yf and R32 + R1243zf at different compositions in various conditions, and found that the measured values agreed well with the calculated values from the model, indicating the effectiveness of the model used.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Thermodynamics
Ximei Liang, Qingyu Sun, Xianyang Meng, Jiangtao Wu
Summary: This study measured the viscosity of several refrigerant mixtures using a vibrating-wire viscometer and developed an extended hard-sphere model to predict the viscosity. The relative deviations between the experimental results and the model predictions were within 2%.
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2022)
Article
Thermodynamics
Shuzhou Peng, Erqi Wang, Shuhao Li, Zhen Yang, Yuanyuan Duan
Summary: The vapor-liquid equilibrium (VLE) properties of R1234yf + R32 + R125 and R1234yf + R32 + CO2 ternary mixtures were measured in this study, and the PR + WS + NRTL model was used to correlate the VLE data. The results showed that both ternary mixtures were zeotropic.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2023)
Article
Thermodynamics
Xinxin Deng, Yu Liu, Chao Liu
Summary: This study investigates the evaporation behaviors of different mass fractions of a mixed refrigerant on a copper surface using molecular dynamics simulations. The results show that R32 molecules are easier to evaporate compared to R1234ze(E), and an increased fraction of R32 leads to a higher evaporation rate in the mixed refrigerant systems. The study also calculates the intermolecular interaction energies to explain the simulation results.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Martin Ryhl Kaern, Gennaro Criscuolo, Knud Erik Meyer, Wiebke Brix Markussen
Summary: This experimental study investigated narrow and high aspect ratio multi-microchannels micro-machined in copper during saturated flow boiling of refrigerants. The study found that these channels could increase the footprint critical heat flux significantly and the effect of inlet subcooling was consistently significant at higher mass fluxes, contrary to previous findings. The research proposed a new correlation model predicting 93.3% of data points within 10% error.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Applied
Xuan Zhang, Qing-rong Zheng, Hong-zhou He
Summary: In this study, a new type of porous material for hydrogen purification from COG was developed by synthesizing M-MOF-74 and incorporating super activated carbon. It was found that Mg-MOF-74 has the highest selectivity value, and blending with AX-21 significantly increased the adsorption capacity and selectivity values.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Thermodynamics
Dongchan Kim, Hangtao Liu, Xiaoxian Yang, Fufang Yang, Jackson Morfitt, Arash Arami-Niya, Mincheol Ryu, Yuanyuan Duan, Eric F. May
Summary: Thermal conductivity measurements were conducted for pure R1243zf and binary mixtures of R32 + R1243zf and R32 + R1234yf using a transient hot-wire technique. Results showed deviations between measured and calculated thermal conductivities at different temperatures and pressures, but the RESCPA model could provide predictions within 10%, indicating its potential for predicting thermal conductivities of mixtures.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Thermodynamics
Houpei Li, Pega Hrnjak
Summary: This paper presents the measurements of flow boiling heat transfer coefficient and pressure gradient for R32 and R1234yf mixtures in a microchannel tube. The results show that mass flux has a significant effect on both heat transfer coefficient and pressure gradient, while heat flux only affects the heat transfer coefficient. Furthermore, the temperature glide curve has an impact on the heat transfer coefficient.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Physics, Applied
Juan Liu, Ping Cai, Hongmei Xu
Summary: In this study, molecular dynamics and grand canonical Monte Carlo simulations were used to investigate the adsorption and energy storage properties of R32, R134a, and R1234yf in MOF-5 and MOF-177. The results showed that smaller molecular-sized working fluids were easier to absorb and desorb in the MOF structures. Additionally, MOFs with larger specific surface areas and pore sizes could absorb more organic working fluids, resulting in greater enhancement of energy storage.
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2022)
Article
Energy & Fuels
Kexin Yi, Yuanyang Zhao, Guangbin Liu, Qichao Yang, Guoxin Yu, Liansheng Li
Summary: With the increasing global requirements for environmental protection, refrigerants with ODP of 0 and low GWP are widely concerned and applied. A study was conducted to simulate the replacement of R134a centrifugal compressor with R1234yf and R1234ze(E) using the CFD numerical method. The results showed that the replacement had different effects on cooling capacity and COP. Compared with R134a, R1234ze(E) had a smaller reduction in system performance, while R1234yf had a larger reduction.
Article
Thermodynamics
D. Sanchez, R. Larrondo, F. Vidan-Falomir, R. Cabello
Summary: Using CO2 mixtures can increase the critical temperature and reduce working pressures, but its overall effect on cycle performance has not been studied in detail. This study experimentally compared the performance of CO2-binary blends and pure CO2 in different cycle arrangements.
APPLIED THERMAL ENGINEERING
(2024)
Article
Food Science & Technology
Lihui Zhang, Yu Qiao, Chao Wang, Li Liao, Lu Liu, Defang Shi, Kejing An, Jianzhong Hu, Qing Xu
JOURNAL OF FOOD QUALITY
(2019)
Article
Materials Science, Multidisciplinary
Linxing Zhang, Sen Tian, Tiefeng Peng
Article
Chemistry, Multidisciplinary
Qiang Wang, Qizhong Tang, Sen Tian
Article
Physics, Applied
Zhuangjun Wu, Maoxiang Li, Sen Tian, Linxing Zhang
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2020)
Article
Physics, Applied
Yi Que, Sen Tian, Maoxiang Li, Xuanyan Dai
MODERN PHYSICS LETTERS B
(2020)
Article
Physics, Applied
Sen Tian, Xuanyan Dai, Maoxiang Li, Linxing Zhang, Jie Chen
MODERN PHYSICS LETTERS B
(2020)
Article
Nanoscience & Nanotechnology
Xuechao Gao, Zhi Li, Cheng Chen, Chao Da, Lang Liu, Sen Tian, Guozhao Ji
Summary: The interfacial barrier of entry for light gas transport in a nanopore was found to be a crucial factor in determining separation efficiency in membrane technologies. By using a finite element method and a slit pore model, the interfacial resistance can be analyzed accurately to predict the ideal selectivity between gases.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Environmental Sciences
Weile Geng, Wensong Wang, Zuoan Wei, Gun Huang, Xiaofei Jing, Changbao Jiang, Sen Tian
Summary: This study investigated the effect of moisture content on the deformation characteristics of unsaturated tailings and found that different moisture contents of tailings exhibit similar deformation characteristics under load, which can be divided into four stages, with an optimal moisture content corresponding to maximum deformation resistance. The influence of the liquid bridge regime on the mesostructure deformation of unsaturated tailings was also discussed in this study.
Article
Geosciences, Multidisciplinary
Sen Tian, Xuanyan Dai, Guangjin Wang, Yiyu Lu, Jie Chen
Summary: This study investigated the safety of tailings impoundments and the potential secondary disasters caused by dam breaks. Experimental and theoretical analysis were conducted to examine the processes of tailings dam overtopping and dam body collapse. The research also explored the characteristics of leaked tailings flow evolution after dam failure.
Article
Energy & Fuels
Xuanyan Dai, Sen Tian, Yi He, Yiyu Lu, Guangjin Wang
Summary: This study investigated the adsorption and diffusion performances of methane and carbon dioxide in different minerals using MD and GCMC methods, revealing that the adsorption capacities and diffusion coefficients varied with buried depths. Montmorillonite exhibited the highest adsorption capacity for carbon dioxide, while methane was more susceptible to competitive adsorption in mixed adsorption scenarios.
Article
Energy & Fuels
Sen Tian, Ruyi Bai, Xuanyan Dai, Yiyu Lu, Jie Chen, Guangjin Wang
Summary: This study investigates the adsorption rules of methane and carbon dioxide in clay minerals found in shale. It examines the influence of temperature and pressure on gas adsorption quantity and compares the adsorption characteristics of different mineral components. The results suggest that at lower temperatures and higher pressures, the minerals have greater adsorption quantities for gas, with carbon dioxide being more easily adsorbed. The optimal fitting model for the adsorption isotherm curves is the Freundlich model.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Geosciences, Multidisciplinary
Sen Tian, Yi He, Ruyi Bai, Jie Chen, Guangjin Wang
Summary: The size distribution of tailings particles in different regions of the tailings reservoir during storage greatly affects the consolidation efficiency and stability of the tailings dam. This study conducted sampling, consolidation, and triaxial shear experiments to explore the consolidation characteristics and strength variation of tailings with different gradations. The results showed that the compressibility and porosity of tailings changed significantly with an increase in fine particle content. The consolidation coefficient of fine particles increased with consolidation pressure, while the compressibility coefficient decreased sharply. The dominance of coarse particles resulted in a more stable pore structure and higher shear strength in the tailings.
Article
Engineering, Geological
Guangjin Wang, Sen Tian, Bin Hu, Jie Chen, Xiangyun Kong
Summary: Based on the previous tailings dam break model experiment and numerical simulation results, an evaluation index system for the hazards induced by discharged tailings flow was established using uncertainty measurement theory. The results showed that the evolution process of discharged tailings flow was divided into three stages, with a greater sand burst amount associated with a greater risk to the downstream of the tailings impoundment.
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2021)
Article
Engineering, Geological
Zehao Cao, Sen Tian, Hu Si, Yiyu Lu, Jie Chen
GEOTECHNICAL AND GEOLOGICAL ENGINEERING
(2020)
