Article
Construction & Building Technology
Ji-Su Choi, Gun-Joo Jung, Kyu-Nam Rhee
Summary: Ceiling radiant cooling panel (CRCP) systems have been widely used for space cooling due to their high thermal comfort and energy efficiency. However, the cooling capacity of CRCP systems can be limited due to the need to maintain the panel surface temperature above the dew-point temperature. In this study, a fan-assisted ceiling radiant cooling panel (FCRCP) system was developed using small and low-cost fans to enhance the cooling capacity without major modifications to the existing architectural or mechanical elements. Experimental and numerical analysis results showed that the FCRCP system can significantly improve the cooling performance compared to conventional CRCP systems.
ENERGY AND BUILDINGS
(2023)
Article
Energy & Fuels
Andres Gallardo, Umberto Berardi
Summary: The study developed a RCP system with PCM and established design criteria through parametric dynamic simulations, showing effective results in a small test chamber.
Article
Thermodynamics
Yiwei Fan, Zhaohui Wang, Ting Fu
Summary: A novel double-layered dendritic channels liquid cooling system was proposed for electric vehicle lithium-ion battery cooling, and multi-objective optimization design was carried out based on constructal theory. The optimized design significantly reduced the maximum temperature, surface temperature standard deviation, and pressure drop, showing potential for more efficient cooling system design.
APPLIED THERMAL ENGINEERING
(2021)
Article
Construction & Building Technology
Ali Radwan, Takao Katsura, Lan Ding, Ahmed A. Serageldin, Ahmed EL-Seesy, Katsunori Nagano
Summary: This article presents a new type of CRCP based on multi-segmented mini-channels, which achieves higher cooling capacity and lower power consumption compared to the traditional flat sheet-and-tube panels. By inclining and increasing the area, the new design significantly enhances the cooling capacity at the same indoor temperature.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Energy & Fuels
Mohammad Hakim Mohd Radzai, Chong Tak Yaw, Chin Wai Lim, Siaw Paw Koh, Nur Amirani Ahmad
Summary: The article focuses on maximizing the cooling capacity of a radiant cooling panel through flow configuration. Different chilled water pipe configurations were designed and compared with conventional serpentine flow configuration. It was found that the proposed designs have the potential to improve the overall efficiency of RCP in terms of temperature distribution, cooling capacity, and pressure drop.
Article
Construction & Building Technology
Marie Rugholm Krusaa, Ida Orduk Hoffmann, Christian Anker Hviid
Summary: This paper experimentally investigates the cooling performance of a concept where a radiant ceiling is suspended from a hollow-core concrete slab and ventilation air is distributed without ducts and air terminals. The results show that the concept performs well in terms of thermal comfort and draught, and offers streamlined installation procedures.
ENERGY AND BUILDINGS
(2022)
Article
Thermodynamics
Minzhi Ye, Ahmed A. Serageldin, Ali Radwan, Hideki Sato, Katsunori Nagano
Summary: Research shows that the ceiling radiant cooling panel with a segmented and concave surface performs well in terms of thermal efficiency in a laboratory-scale room, as lowering the inlet water temperature can effectively reduce the average air temperature and increase the total heat flux. The heat flux of the panel varies significantly with changes in inlet water temperature, while changes in flow rate have a smaller impact.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Minzhi Ye, Ahmed A. Serageldin, Katsunori Nagano
Summary: The study proposed an integrated system combining a novel free-suspended ceiling radiant cooling panel with a wall Attached Ventilation system to improve indoor thermal comfort conditions and achieve better thermal comfort. The results showed that using a ventilation system with a ceiling inlet and ceiling outlet was more effective, and selecting specific operating conditions could achieve the optimal design.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Construction & Building Technology
Jun Shinoda, Ongun B. Kazanci, Katsuaki Hidari, Hiroki Watanabe, Yoshimi Takahashi, Shin-ichi Tanabe
Summary: This study aims to quantify the effect of plenum temperature on the room-and plenum-side cooling of suspended radiant ceiling panels and proposes a methodology to measure and predict the cooling at both sides of the panel.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Thermodynamics
Wei Chen, Min Tu, Hui Huang, Junlu Fang, Wenhao Deng
Summary: This paper introduces an innovative aquifer-cooled radiant wall panel system that improves cooling capacity and maintains uniform surface temperatures. Compared to traditional radiant systems, this system's installation does not compromise space height and demonstrates high efficiency and reliability in experimental tests.
APPLIED THERMAL ENGINEERING
(2024)
Article
Construction & Building Technology
Ahmed A. Serageldin, Minzhi Ye, Ali Radwan, Hideki Sato, Katsunori Nagano
Summary: The optimized segmented concave RCH panel can reduce indoor air temperature and floor temperature, improving thermal performance and thermal comfort.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Energy & Fuels
Mi-Su Shin, Ji-Su Choi, Kyu-Nam Rhee
Summary: The study found that using an open-type installation for CRCP systems with air circulators can enhance cooling capacity and energy efficiency, effectively reducing condensation risk and energy consumption.
Article
Construction & Building Technology
Yuying Liang, Nan Zhang, Huijun Wu, Xinhua Xu, Ke Du, Jianming Yang, Qin Sun, Kaijun Dong, Gongsheng Huang
Summary: The study shows that the thermal environment and thermal comfort created by the DRCU under low radiant cooling temperatures meet the comfort criteria of the ASHRAE Standard.
BUILDING AND ENVIRONMENT
(2021)
Article
Thermodynamics
Yong-Kwon Kang, Hansol Lim, Seong-Yong Cheon, Jae-Weon Jeong
Summary: The experimental results showed that increasing the thickness of the PCM layer helps extend the duration of both active and passive cooling, and the cooling capacity decreases with lower MRT. The optimum PCM thickness was determined to be 6-8mm based on objective functions, with a higher emphasis on minimizing electric power consumption rather than maximizing cooling capacity.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Daoming Xing, Nianping Li
Summary: This study reconsiders the pipe-plate structure of radiant cooling panels and constructs radiant cooling panels with integrated flow channels, similar to liquid cooling plates. The effects of panel materials, flow channels, and dimensions on the thermal and hydraulic performance are discussed in detail based on numerical calculations.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
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
Thermodynamics
Alexandre Malley-Ernewein, Sylvie Lorente
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(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
Thermodynamics
Matthieu Labat, Ion Hazyuk
Summary: Ventilated slabs are a type of Thermally Activated Building System (TABS) that utilize the thermal inertia of a slab and the supply air for heating and cooling. Efficient control techniques, such as Model Predictive Control, can be used to maintain the desired indoor temperature range with minimal energy consumption. Lower airflow rates are preferred as they reduce fan energy consumption and improve indoor comfort.
APPLIED THERMAL ENGINEERING
(2023)
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
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)