Article
Energy & Fuels
Alexandre Malley-Ernewein, Sylvie Lorente
Summary: This paper presents a flow configuration design for Thermochemical Energy Storage using salt impregnated porous medium, proposing a Fishbone-like structure for the design. Through thermodynamic analysis and constructal approach, it identifies an efficient arrangement of the Fishbones to enhance energy efficiency.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Wei Li, Lianjie Zhang, Jiri Jaromfr Klemes, Qiuwang Wang, Min Zeng
Summary: This study proposes a corrugated-shaped heat storage unit with an embedded porous metal bracket to enhance heat transfer and comprehensively investigates thermo-chemical conversion behaviors. Numerical results show that increasing the heat fluid transfer temperature facilitates charging while decreasing reaction bed temperature promotes discharging. Increasing evaporation temperature and thermal conductivity of the thermochemical material can shorten the reaction period.
Article
Construction & Building Technology
Cheng Zeng, Shuli Liu, Ashish Shukla, Liu Yang, Xiaojing Han, Yongliang Shen
Summary: The study reveals that the charging performance of the reactor depends on factors such as charging temperature, air flow rate, bed porosity, and charging duration, while the discharging performance is affected by inlet air temperature, inlet air relative humidity, and material particle diameter. Suggestions have been given for these parameters based on the analysis, and a holistic control strategy should be considered in future reactor studies.
ENERGY AND BUILDINGS
(2021)
Article
Energy & Fuels
Mengyi Wang, Li Chen, Yuhao Zhou, Wen-Quan Tao
Summary: In this study, a three-dimensional numerical model is developed to investigate the thermochemical energy storage process by Ca(OH)(2) dehydration reaction. The study reveals that the inlet temperature and velocity of the heat transfer fluid have an impact on the reaction, and lower porosity leads to higher flow resistance. By adding more tubes, the reaction time is shortened and the energy storage amount is increased. Different schemes are discussed to improve the energy conversion performance of the reactor.
Article
Green & Sustainable Science & Technology
Heng Zhang, Shuli Liu, Ashish Shukla, Yuliang Zou, Xiaojing Han, Yongliang Shen, Liu Yang, Pengwei Zhang, Kanzumba Kusakana
Summary: This paper investigates the use of copper mesh for enhancing the thermal performance of thermochemical reactors, showing that the copper mesh method has better thermal performance, including higher temperature rise and lower pressure drop.
Article
Chemistry, Physical
Kelvin Randhir, Michael Hayes, Philipp Schimmels, Joerg Petrasch, James Klausner
Summary: This work presents a unique thermochemical process for charging magnesium-manganese-oxide-based solid-state rechargeable redox fuel. The high-temperature heating of the system can be driven by renewable electricity or concentrated solar power. The main focus of this work is achieving solid flowability at high temperatures and extracting chemically charged solid at ambient temperature with minimal energy loss. The operation strategies described in this work have achieved high system and thermal-to-chemical efficiency, which are the highest reported to date for thermochemical fuels.
Article
Energy & Fuels
Jintao Song, Ziming Cheng, Yaping Fan, Fuqiang Wang, Xuhang Shi, Jie Xu, Hongliang Yi
Summary: Inspired by the physical mechanism of the human ear, a biomimetic solar thermochemical reactor is proposed to improve energy conversion efficiency. By regulating the radiative intensity and temperature field, it achieves high methane conversion efficiency and energy storage efficiency.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Assaad Alsahlani, Nesrin Ozalp, Kelvin Randhir, Michael Hayes, Philipp Schimmels, James Klausner
Summary: This paper presents a low-order heat transfer model for the design of a solar thermochemical energy storage reactor. The model involves indirect heating of gas and solid reactants to convert solar energy into a stable form for long-term storage. Numerical simulations were used to validate the experimental results and could be used for designing a feedback control system for the reactor temperature.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Green & Sustainable Science & Technology
J. F. Lu, Y. X. Dong, Y. R. Wang, W. L. Wang, J. Ding
Summary: The thermochemical energy storage performance of methane reforming with carbon dioxide in a cavity reactor under a concentrated sun simulator has been studied both experimentally and numerically. A novel catalyst bed structure with Ni/Al2O3 particles and perforated quartz encapsulation is proposed, which allows for high bed temperature and greenhouse effect, resulting in high chemical energy storage efficiency and total energy utilization efficiency of up to 41.1% and 80.3%, respectively.
Article
Engineering, Environmental
Xiaoyi Chen, Xiaogang Jin, Zhihao Zhang, Danyang Song, Xiang Ling, Yan Wang, Liujuan Zhu
Summary: In the field of thermochemical energy storage, the reactor design faces challenges due to low thermal conductivity or permeability of solid reactants. A novel spiral coil reactor based on pneumatic transmission and secondary flow is proposed in this paper for thermochemical energy storage, where CaCO3 conversion is low mainly due to particle agglomeration and sintering at high temperatures which result in unstable gas velocity and pressure drop fluctuations.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
B. Chen, K. Johannes, M. Horgnies, V Morin, F. Kuznik
Summary: The energy storage technology based on ettringite shows potential for storing excess solar energy to meet heating needs in buildings. Experimental results demonstrate that this material has high energy storage capacity, low charging temperature, and high power output, making it a promising solution for thermal energy storage.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Physical
Tiziano Delise, Salvatore Sau, Anna Chiara Tizzoni, Annarita Spadoni, Natale Corsaro, Raffaele Liberatore, Tania Morabito, Emiliana Mansi
Summary: Chemical systems for thermal energy storage show promise in addressing solar irradiation fluctuation issues, and this study focused on simulating a configuration using an indirect-packed bed heat exchanger. Despite limitations in heat exchange efficiency, the results demonstrated a good storage efficiency of about 0.7.
Article
Energy & Fuels
Ruby-Jean Clark, Mohammed Farid
Summary: The study demonstrates that a cascade thermochemical energy storage system can improve thermal and exergy efficiencies, with high energy density, power output, and temperature lift over a range of dehydration temperatures.
Article
Energy & Fuels
Arun Mathew, Nima Nadim, Tilak T. Chandratilleke, Mark Paskevicius, Terry D. Humphries, Craig E. Buckley
Summary: This study conducted kinetic and parametric analyses of the carbonation reaction of CaCO3 with Al2O3 as well as the performance of a thermochemical reactor. The results revealed the rapid reaction kinetics of the carbonation reaction and provided a suitable model to explain the growth of carbonation. Numerical analysis showed that increasing the thermal conductivity of the reactor bed and reducing the boundary temperature can greatly improve the reactor's performance.
Article
Energy & Fuels
Wei Huang, David Korba, Kelvin Randhir, Joerg Petrasch, James Klausner, Nick AuYeung, Like Li
Summary: Efficient high-temperature thermochemical reactors along with optimal operating conditions are crucial for achieving high-efficiency long-term solar energy storage. Computational modeling, coupled with experimental validation, is utilized to investigate the thermal reduction of metal oxide materials and enhance energy conversion efficiency in thermal reactors.
Article
Thermodynamics
Matthieu Labat, Sylvie Lorente, Mohamed Mosa
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2020)
Article
Thermodynamics
E. S. D. Estrada, E. X. Barreto, L. A. Isoldi, E. D. dos Santos, S. Lorente, L. A. O. Rocha
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2020)
Article
Multidisciplinary Sciences
Sylvie Lorente, Mathieu Hautefeuille, Aczel Sanchez-Cedillo
SCIENTIFIC REPORTS
(2020)
Article
Construction & Building Technology
Billy Seng, Camille Magniont, Sandra Gallego, Sylvie Lorente
Summary: This study documents the behavior of a hemp-based hygroscopic material at wall scale under various temperature and moisture dynamic conditions. The experiments and numerical model demonstrate how heat and moisture transport phenomena within the wall are coupled, with temperature difference serving as a driving force for moisture release. Moisture adsorption impacts heat release and temperature changes within the wall.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Matthieu Labat, Ion Hazyuk, Matthieu Cezard, Sylvie Lorente
Summary: This paper presents a methodology for obtaining a lumped model based on the identification of the transfer functions for constant airflow rate systems, which can accurately obtain the main heat fluxes at a much lower computational cost. The study found that increasing the number of ducts promotes better indoor temperature stability, while the mass flow rate appeared to be crucial.
JOURNAL OF BUILDING PERFORMANCE SIMULATION
(2021)
Article
Thermodynamics
Xuewei Zhang, Sylvie Lorente, Aaron P. Wemhoff
Summary: This project investigates the use of PCM as a thermal energy barrier, introducing a new efficiency metric. Results show that the predicted thermal barrier efficiency exceeds the limits, offering useful conservative estimates for designing PCM thermal barriers.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Energy & Fuels
Bruna Rodrigues Nunes, Michel Kepes Rodrigues, Luiz Alberto Oliveira Rocha, Matthieu Labat, Sylvie Lorente, Elizaldo Domingues dos Santos, Liercio Andre Isoldi, Cesare Biserni
Summary: Significant advancements have been made in developing earth-air heat exchanger models in the past few decades. The geometric evaluation of different arrangements showed that complex designs can increase thermal potential, while configurations with few curves are beneficial for reducing air pressure drop.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Thermodynamics
Sahin Gungor, Erdal Cetkin, Sylvie Lorente
Summary: A liquid cooling system based on constructal canopy-to-canopy architectures is proposed for efficient thermal management of electric vehicle battery packs. The system can effectively extract the non-uniformly generated heat by the battery cell during the discharging phase. The configuration of the cooling solution is predicted following the constructal methodology, leading to the choice of the hydraulic diameter ratios.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Physics, Applied
Xuewei Zhang, Sylvie Lorente
Summary: In this study, the architecture of capillary flow networks in a steady state is analyzed, and the impact of network morphology on maximum mass flow rate is investigated. A search algorithm is developed to determine the optimal parameters. The results demonstrate the superiority of dendritic structures in the roots and canopy branches of capillary trees.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physiology
Aimee M. Torres Rojas, Sylvie Lorente, Mathieu Hautefeuille, Aczel Sanchez-Cedillo
Summary: The liver plays a crucial role in metabolic homeostasis and has a complex vascular anatomy that can be modeled using the constructal law to predict and simulate processes in liver diseases, healing, and regeneration. The vascular network in the liver is critical for mechanics-related processes and blood flow redistribution in hepatic resilience.
FRONTIERS IN PHYSIOLOGY
(2021)
Article
Energy & Fuels
Alexandre Malley-Ernewein, Sylvie Lorente
Summary: This paper presents a flow configuration design for Thermochemical Energy Storage using salt impregnated porous medium, proposing a Fishbone-like structure for the design. Through thermodynamic analysis and constructal approach, it identifies an efficient arrangement of the Fishbones to enhance energy efficiency.
JOURNAL OF ENERGY STORAGE
(2022)
Proceedings Paper
Construction & Building Technology
M. Cezard, M. Labat, S. Lorente
Summary: This paper documents the design method of an air-based thermally activated building system (TABS) suitable for retrofitting tertiary buildings, mainly for cooling purposes. The design process includes general design, energy balance checks, and development of a numerical model under a finite element method multi-physics environment. The specifications for a 1:1 scale prototype are obtained for construction documentation.
CARBON-NEUTRAL CITIES - ENERGY EFFICIENCY AND RENEWABLES IN THE DIGITAL ERA (CISBAT 2021)
(2021)
Article
Thermodynamics
Mohamed Mosa, Alexandre Malley-Ernewein
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)