Review
Green & Sustainable Science & Technology
Tao Zhang, Dongxin Huo, Chengyao Wang, Zhengrong Shi
Summary: This study summarizes different methods to solve the phase transition process, discusses the advantages of employing CFD software to simulate the process, and reveals the influences of natural convection and nanoparticles on solidification/melting processes. The challenges and future developments in solution methods are also prospected.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Mechanics
Xiaohong Yan, Guang Chen
Summary: An approximation approach for the implementation of the phase change model based on the volume-of fluid method is proposed, showing good agreement with analytical solutions and experimental data for film boiling, bubble growth, and condensation processes. This verifies the accuracy of the current approximation approach.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Thermodynamics
Thanh-Hoang Phan, Van-Tu Nguyen, Trong-Nguyen Duy, Dong-Hyun Kim, Warn-Gyu Park
Summary: This study explores the effects of phase-change on the dynamics of cavitation bubbles over multiple cycles. A two-phase homogeneous mixture model combined with an interface-capturing method was used to simulate the bubble dynamics, taking into account compressibility, heat transfer, condensation, and evaporation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Marco A. B. Zanoni, Jiahao Wang, Jose L. Torero, Jason I. Gerhard
Summary: Moisture transport, evaporation, and condensation are crucial mechanisms in the energy management of processes occurring in porous media. This study developed a one-dimensional numerical model to accurately predict the movement of evaporative and condensation fronts in a partially saturated porous bed. The model successfully captured experimental results by introducing calibration constants in the effective thermal properties.
APPLIED THERMAL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Everett A. Wenzel, Marco Arienti
Summary: This paper presents a method for simulating evaporation in a compressible, interface-resolved framework. The method ensures consistent mass and thermal energy transport at the phase interface, conserves mass, momentum, and energy, and can model compressible and incompressible systems. Verification and validation tests are performed, and the method is shown to be accurate and efficient in studying phase change in engineering systems.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Thermodynamics
Jiahao Wang, Marco A. B. Zanoni, Jose L. Torero, Jason I. Gerhard
Summary: Accurately understanding the storage and transfer of energy in porous media is crucial for applied smoldering systems. Water evaporation and condensation play important roles in energy conservation during smoldering, especially when there is significant water presence. This study presents a one-dimensional smoldering model that considers water phase change and successfully predicts the progression of evaporation, condensation, and smoldering reactions. The model can be used to improve wet smoldering applications by increasing fuel concentration and injected airflow. Additionally, five characteristic zones are established for the wet smoldering front, including evaporation, condensation, pre-heating, smoldering, and cooling.
COMBUSTION AND FLAME
(2023)
Article
Mechanics
Anirban Chandra, Zhi Liang, Assad A. Oberai, Onkar Sahni, Pawel Keblinski
Summary: The study examines the efficiency of continuum methods in modeling multi-phase flow at large scales and raises questions about their applicability to nanoscale systems. It also emphasizes the importance of appropriate constitutive relations at liquid-vapor interfaces for correctly representing the dynamics of the specific problem of interest. The results suggest that with certain approaches, interfacial phenomena can be accurately described in the context of liquid-vapor phase change.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Thermodynamics
Zhao Liu, Jin Zhao, Chao Wang, Yangjun Qin, Yanbiao Wang, Chang Liu
Summary: A comprehensive two-dimensional model is established to investigate the thermal performance of a two-phase closed thermosyphon charged with acetone. The VOF method is used to simulate phase change and two-phase flow behaviors, while a user-defined function (UDF) source is employed for the mass and heat transfer processes. The results show that the TPCT with an extended condenser surface can maintain thermal homogeneity and enhance heat transfer performance, leading to a decrease in total thermal resistance compared to a normal condenser.
HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
N. Karami, A. Tessier-Poirier, E. Leveille, L. G. Frechette
Summary: This paper experimentally investigates the effect of phase change timing on the oscillation amplitude for a vapor bubble-liquid plug system. Two different working fluids, water and ethanol, are studied. By manipulating the phase change through a wicking fiber, stable oscillations with constant amplitude can be achieved. A new tool is proposed to evaluate the phase change effectiveness, which is defined as the ratio of the phase change work to the maximum theoretical work. The study shows the potential for optimizing the oscillations in pulsating heat pipes and self-oscillating fluidic heat engines by engineering the phase change.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Lukasz Adrian, Szymon Szufa, Piotr Piersa, Piotr Kurylo, Filip Mikolajczyk, Krystian Kurowski, Slawomir Pochwala, Andrzej Obraniak, Jacek Stelmach, Grzegorz Wielgosinski, Justyna Czerwinska, Przemyslaw Kubiak
Summary: This study focuses on analyzing methods to enhance heat transfer efficiency in heat exchangers. Experimental tests showed that the heat recovery efficiency from the ground in the examined exchangers exceeded 90%, leading to reduced emissions in building heating systems.
Article
Environmental Sciences
Mishal Alsehli
Summary: The research investigates the performance of a hybrid solar desalination arrangement to solve freshwater shortage in remote areas. The use of a parabolic trough solar collector, automatic solar tracking system, modified solar still, and condensation units improved the productivity of the system. The inclusion of hot feed water, condenser, and phase change material further enhanced the yield of the modified solar still. The study shows the potential of this hybrid solar desalination system in providing a large quantity of fresh water in arid regions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Mechanics
M. R. Moore, D. Vella, J. M. Oliver
Summary: In this study, we investigate the influence of droplet geometry on the formation of the coffee-ring during evaporation. By analyzing two different evaporation models, we find that the curvature of the contact line affects the formation and growth of the coffee ring.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Thermodynamics
Wei Deng, Tianquan Wang, Jingtan Chen, Sihong He, Kejian Dong, Jiyun Zhao
Summary: This paper adopts Molecular Dynamics simulation to study nanoscale heat pipes. Hydrophilic/hydrophobic patterns are applied on the hot and cold surfaces to enhance performance. It is found that the pattern on the hot surface increases evaporation rate, while the pattern on the cold surface does not significantly affect condensation rate. Constructing nanopillars on the cold surface does not necessarily enhance performance due to hindered liquid circulation.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Ali Basem, Karrar A. Hammoodi, Ammar M. Al-Tajer, A. M. Mohsen, Ihab Omar
Summary: This study investigated the effects of increasing heat transmission on paraffin wax in a half-cylindrical cell with a range of copper rods, revealing that the melting time of paraffin wax decreases with an increasing number of rods.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Mechanics
E. S. Benilov
Summary: The present paper discusses the role of interfacial physics in the evaporation of liquids and derives a generalized version of Maxwell's boundary condition for the near-interface vapor density using the diffuse-interface model. The study shows that the vapor emission capacity of the interface exceeds the throughput of air only when the radius of the liquid drop is approximately 10 μm or larger, and for a radius of about 2 μm, they are comparable. When the radius is less than or approximately 1 μm, evaporation is driven by the interface, resulting in a noticeably smaller evaporation rate than predicted by the classical model.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Energy & Fuels
Iker Camacho, Qicheng Chen, Luis Gonzalez-Fernandez, Oleksandr Bondarchuk, Luis Bartolome, Zhu Jiang, Yulong Ding, Yaroslav Grosu
Summary: Research suggests that adding nanoparticles can reduce the corrosivity of molten salts. Through experiments and simulations, it was found that nanoparticles diffuse into construction materials at high temperatures, thus slowing down the corrosion of molten salts, paving the way for new anti-corrosion strategies.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Materials Science, Ceramics
Renwei Li, Qicheng Chen, Mingxi Ji, Yulong Ding
Summary: This study implements a first-principles calculations method to explore the effects of rare-earth element dopants on the properties of the alpha-Al2O3 (0001)/gamma-Fe (111) interface. The results show that the doped-Y Fe/Al2O3 interface has greater adhesion energy and improved critical strain and tensile stress compared to the non-doped interface. The introduction of rare-earth Y changes the failure mode of the Fe/Al2O3 interface from brittle to toughness fracture, significantly improving its mechanical performance.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
Qicheng Chen, Chenyu Wang, Yingjin Zhang, Yulong Ding
Summary: The integration of concentrated solar power (CSP) with calcium looping (CaL) system and methane reforming (MR) subsystem has achieved significant breakthroughs in solar energy utilization. By combining the MR subsystem with the energy storage (ES) and energy release (ER) units, the CSP-CaL-MR systems effectively solve the problems of heat loss and power demand in the traditional CSP-CaL systems. The design and optimization strategy based on thermal dynamic properties demonstrates improved efficiency of power generation and overall energy consumption reduction.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Polymer Science
Qicheng Chen, Nan He, Jing Fan, Fenhong Song
Summary: This study synthesized four deep eutectic solvents (DESs) and measured their physical properties. The relationship between density and surface tension with temperature was analyzed and fitted as a linear function. The commonly used Arrhenius model was used to describe the dependence between viscosity and temperature. These findings are significant for both the industrial applications of DESs and the research on their synthesis mechanism and microstructure.
Article
Energy & Fuels
Junting Wu, Qicheng Chen, Yingjin Zhang, Kanglong Sun
Summary: A novel latent heat thermal energy storage (LHTES) unit with discrete heat and cold sources was proposed and numerically investigated. The performance of different arrangements was compared, and the results showed that the discrete source arrangement significantly improved the performance of the side-heated LHTES unit, but had no obvious improvement on the bottom-heated LHTES unit.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Junting Wu, Yingjin Zhang, Kanglong Sun, Qicheng Chen
Summary: This study aims to improve the thermal performance and flexibility of triple-tube latent heat thermal energy storage (LHTES) unit by enhancing the operating modes and fin configurations. By establishing a numerical model and analyzing entropy generation, the optimal combination of operating mode and fin configuration is proposed.
Article
Chemistry, Physical
Tianxiao Cui, Qicheng Chen, Yingjin Zhang, Binjian Nie, Boting Yang
APPLIED SURFACE SCIENCE
(2022)
Article
Agricultural Engineering
Dayu Yu, Guizhen Xie, Qicheng Chen, Yang Yang, Nanhang Dong
Summary: This paper investigates the liquefaction of microalgae and yeasts in subcritical water, analyzing the fractional yield distribution and characteristics of the end-products. In comparison to the pyrolysis biocrudes of algae and yeast, the HTL biocrudes do not have an advantage in terms of N-containing compounds.
BIOMASS & BIOENERGY
(2022)
Article
Engineering, Environmental
Zhiwei Ge, Feng Jiang, Qicheng Chen, Liang Wang, Yulong Ding, Haisheng Chen
Summary: This study presents a strategy of using MgO-supported molten salt to enhance the multicycle stability of calcium-based materials in thermochemical energy storage systems. The supported molten salt helps to maintain stable thermal energy during cycling, making it a promising approach for designing high-temperature thermal energy storage systems.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Qicheng Chen, Junting Wu, Kanglong Sun, Yingjin Zhang
Summary: This study investigates the effects of bifurcated fins on the phase change process, proposes a novel arc-shaped fin configuration, and analyzes entropy generation and thermal uniformity. The results demonstrate that bifurcated fins can effectively reduce entropy generation, and arc-shaped fins have better thermal performance and shorter energy storage and release time compared to straight fins.
Article
Physics, Condensed Matter
Dehao Kong, Mingxi Ji, Qicheng Chen, Yingjin Zhang, Binjian Nie
Summary: The optical and thermodynamic properties of Fe-doped Ca-based materials were investigated using the Density Functional Theory method. The results showed that the incorporation of Fe atoms formed inert structures, improving the sintering resistance of CaO at high temperatures. Furthermore, the doping of Fe facilitated electron transitions, enhancing the light absorption ability of the Cabased composites. The thermodynamic analysis revealed that the thermal conductivity and specific heat capacity decreased with increasing iron content, while the Debye temperature increased. Additionally, Fe doping reduced the activation energy and suppressed the reaction rate of CaO with CO2 due to the formation of electron-deficient O sites on the surface.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Engineering, Chemical
Yang Yu, Kai Wang, Yurong Zhao, Qicheng Chen, Nanhang Dong
Summary: The effects of magnetic fields on the flow and heat transfer of nanofluids were investigated, and it was found that applying a magnetic field can increase the heat transfer coefficients of Cu-H2O nanofluids. Moreover, both the heat transfer coefficients and the Nusselt numbers increase with the increment of magnetic field intensities.
Article
Thermodynamics
Nan He, Qicheng Chen, Jing Fan, Fenhong Song, Yukun Zhang, Han Mu
Summary: Compared with traditional organic solvents and ionic liquids, deep eutectic solvents (DESs) have shown remarkable advantages in CO2 absorption, such as low melting point, cheapness, easy preparation, regeneration and biodegradation. In this study, halogen-free DESs composed of betaine as hydrogen bond acceptor, 1,2-propanediol and diethylene glycol as hydrogen bond donor were used to absorb CO2. The CO2 solubility in DESs was found to increase with decreasing temperature and increasing pressure. The Jou and Mather model was employed to calculate the CO2 solubility data and the results were compared with experimental results. The study also provided insights into the thermodynamic properties and regeneration process of the DES-CO2 system.
JOURNAL OF CHEMICAL THERMODYNAMICS
(2023)
Article
Chemistry, Multidisciplinary
Zhaofeng Dai, Bohan Shao, Qicheng Chen, Yulong Ding, Yongliang Li, Muxing Zhang, Ershuai Yin, Xiaohui She, Xiaosong Zhang, Dongliang Zhao
Summary: This study successfully synthesizes a plastic crystal composite material with a colossal barocaloric effect and excellent thermal conductivity through molecular design and dual encapsulation strategies. The resulting composite material exhibits high entropy change and thermal conductivity under pressure changes below 40 MPa, along with high mechanical response and fatigue resistance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Nan He, Qicheng Chen, Jing Fan, Fenhong Song, Nanhang Dong
Summary: In this study, the structure and properties of DESs synthesized by different molar ratios of betaine and 1,2-propanediol were investigated using DFT and MD simulation. The results confirmed the importance of the relationship between betaine and 1,2-propanediol in the formation of stable DESs. The analysis of hydrogen bonds suggested that the electrostatic interaction between the oxygen atoms of betaine and hydrogen atoms from the hydroxyl groups of 1,2-propanediol played a major role in the stability of DESs. Additionally, increasing the content of 1,2-propanediol weakened the hydrogen bond between betaine and 1,2-propanediol, and strengthened the hydrogen bond between 1,2-propanediol molecules. The viscosity of DESs was mainly determined by the interaction between betaine and 1,2-propanediol.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
