Article
Thermodynamics
Yueqiong Wu, Kuibin Zhou, Mengya Zhou, Mengyuan Huang, Chao Wang, Juncheng Jiang
Summary: A new facility was used to model the jet flame ejected from the ruptured tank, and the geometrical features of the flame and radiant heat fluxes on the tank surface were measured. Two thermal radiation models were established to predict the radiant heat flux field. The prediction of the models agreed well with the experimental measurements.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Engineering, Civil
Chen Wang, Jie Ji
Summary: This study investigates the impact of fuel initial velocity and nozzle-wall spacing on the temperature distribution of a horizontal jet flame impinging a wall. A new dimensionless number is proposed to determine the maximum rising temperature of the flame plume on the wall surface. The volume of the flame plume and the distance between the wall and the flame plume are identified as important factors that explain the trend of radiant heat flux.
FIRE SAFETY JOURNAL
(2022)
Article
Energy & Fuels
Xia Shi, Kuibin Zhou
Summary: This paper presents an experimental investigation on the interaction of double turbulent jet flames with different spacings. It is found that flame buoyancy, exit momentum, and nozzle spacing significantly affect the flame merging behavior. A new dimensionless parameter is proposed to describe the merging probability of double jet flames dominated by flame buoyancy and exit momentum. A correlation is developed to predict the mean flame height of double jet fires.
Article
Thermodynamics
Manhou Li, Chao Zhang, Changjian Wang, Zhaotao Liu, Baozhen Wang
Summary: The research investigates the ignition behaviors of ethanol and heptane pools by adjacent fires, revealing critical factors such as critical ignition time and ignition distance, influenced by pool diameter and interval distance. Experimental results demonstrate significant differences in critical ignition distance for ethanol and heptane pools, highlighting the importance of pool diameter and interval distance in ignition behavior.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Mingwei Liu, Yuanxin Wang, Lijia Luo, Shiyi Bao, Bo Jia, Xuesheng Li, Wuji Ding
Summary: The leakage of combustible materials causing jet fires poses a major threat to chemical plant safety. Thermal radiation from the jet fire can cause severe damage to nearby facilities and people's health. This paper presents a novel segmented line heat source model for calculating the thermal radiation of jet fires. The model divides the jet fire into three segments and considers it as a line heat source radiating heat from its centerline. Three types of thermal radiation models are built based on this model for computing the radiant heat flux distribution around the jet fire. Experimental data and numerical simulation show the effectiveness and advantages of the proposed models.
ASME JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Civil
Fei Tang, Xinyu Peng, Adriana Palacios
Summary: This study experimentally investigated the characteristics and heat flux distribution of flames in jet fire accidents caused by leaks in gas pipelines or gas tanks. The results indicate that the leak hole-tank spacing and fuel initial velocity have an impact on the height and width of the impingement flame. A new characteristic length scale and dimensionless heat release rate were proposed based on the balance of momentum flux and buoyancy flux.
FIRE SAFETY JOURNAL
(2022)
Article
Engineering, Environmental
Nur Shahidah Ab Aziz, Rafiziana Md Kasmani, Mohd Dinie Muhaimin Samsudin, Arshad Ahmad, Aishah Abd Jalil, Norazana Ibrahim
Summary: This study experimentally investigated the characteristics of free horizontal jet fires and the impingement effect using propane as fuel, with different nozzle diameter and exit velocity. The results showed that the flame features of free release changed faster than impinging release, and the presence of downstream objects affected the flame profiles to some extent. Therefore, new correlations were proposed for predicting the projected flame length and trajectory length.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Construction & Building Technology
Archana P. Ambadi, Benny Raphael
Summary: This study experimentally evaluated the radiant heat reflected from light shelves and analysed the trade-off between heat transmission and light. About 5 million data points for heat flux data were collected from light shelves made of different materials. The results provide guidance for selecting materials that reduce heat transmission without significantly affecting reflected light.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Thermodynamics
Xianjia Huang, Yuhong Wang, He Zhu, Le He, Fei Tang, Jennifer Wen
Summary: The study conducted fire experiments of wall-attached fires with different aspect ratios and investigated the effect of the sidewall on flame height and radiant heat flux. Experimental results were consistent with predictions by an existing model, validating the reliability of the setup. A new model based on flame height increase and thermal radiation from the sidewall was developed to estimate radiant heat flux, with prediction error less than 15%.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Kye-Won Park, Masayuki Mizuno, Chang-Geun Cho, Jong-Jin Jeong
Summary: This study conducted experiments by igniting mattresses in different installation height environments, comparing heat radiation measurements and calculated results, and suggesting a detailed assessment of mattress fire risks, requiring different calculation methods when estimating radiant heat.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Environmental
Kuibin Zhou, Mengya Zhou, Mengyuan Huang, Yifan Wang
Summary: This paper presents a systematic investigation on the jet fire in a pit, including the variations of gas entrainment mode and flame behavior. A dimensionless heat release rate coupling the pit geometrical property is developed to correlate the flame area and length, which is validated by experimental data. Models for predicting the thermal radiation of the jet fire are proposed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Kuibin Zhou, Mengya Zhou, Mengyuan Huang, Yifan Wang
Summary: This paper systematically investigates jet fire in a pit (JFP) caused by the explosion of underground pipelines. The study observes different types of flames and develops correlations for flame length and width in various pits, as well as proposes models to predict thermal radiation. The research indicates that flame buoyancy becomes more significant than nozzle exit momentum as the nozzle exit velocity increases, leading to the evolution of JFP behavior.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Energy & Fuels
Zhenhua Tang, Kun Zhao, Zhirong Wang, Jizhe Wang, Yi Pan
Summary: This study focuses on the burning behaviors of horizontal hydrogen jet fires under the action of a water curtain system. The experimental results show that the shape of the hydrogen jet flame expanded on the water curtain is elliptical at different conditions. A new dimensionless heat release rate is proposed to estimate the flame extension length.
Article
Environmental Sciences
Tim Sinsel, Helge Simon, Wanlu Ouyang, Carolina dos Santos Gusson, Paula Shinzato, Michael Bruse
Summary: Mean radiant temperature is a crucial factor in assessing human thermal comfort, and ENVI-met is widely used in this field. However, recent evaluations have identified shortcomings in mean radiant temperature modeling. To improve accuracy, a six-directional radiative flux calculation approach and three established shortwave radiation projection factors have been implemented into ENVI-met. A study in Hong Kong showed that the new modeling approach outperformed previous methods, with a significant improvement in the root mean square error. This improved estimation of mean radiant temperature will contribute to more accurate heat mitigation strategies and resilient urban planning in future climate investigations.
Article
Chemistry, Physical
H. A. J. Froeling, M. T. Droge, G. F. Nane, A. J. M. Van Wijk
Summary: This paper focuses on the risk analysis of hydrogen transmission in existing pipelines, comparing the individual risk associated with hydrogen jet fires with natural gas. The analysis shows that hydrogen jet fires yield lower lethality levels and decrease faster with distance than natural gas jet fires, leading to significant lower individual risk in large pipelines. However, ignition effects dominate the individual risk for decreasing pipeline diameters, causing increased individual risk in the vicinity of the pipeline compared to natural gas.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Multidisciplinary
Gansu Shen, Kuibin Zhou, Fan Wu, Juncheng Jiang, Zhan Dou
Article
Thermodynamics
Kuibin Zhou, Xiuzhen Wang
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2019)
Article
Thermodynamics
Kuibin Zhou, Jing Qian, Xiaole Qin, Zhenghua Wang
APPLIED THERMAL ENGINEERING
(2019)
Article
Energy & Fuels
Kuibin Zhou, Yuzhu Wang, Le Zhang, Yueqiong Wu, Xuan Nie, Juncheng Jiang
Article
Thermodynamics
Xiuzhen Wang, Kuibin Zhou, Ahmed Mebarki, Juncheng Jiang
APPLIED THERMAL ENGINEERING
(2020)
Article
Engineering, Environmental
Zhenhua Wang, Kuibin Zhou, Le Zhang, Xuan Nie, Yueqiong Wu, Juncheng Jiang, Anne Simone Dederichs, Lu He
Summary: The study investigated the impact of impinging jet fire on vertical plates, revealing the effects of nozzle exit velocity, exit diameter, and exit-plate spacing. Experimental observations showed changes in flame pattern and color with variations in exit velocity and exit-plate spacing. A new correlation was developed to predict the flame extension area of horizontally and vertically impinging jet fires.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Civil
Kuibin Zhou, Le Zhang, Mengyuan Huang, Mengya Zhou, Chao Wang
Summary: This paper systematically studies two identical buoyant fires on a slope, investigating the effects of fire spacing, fire power, slope angle, and burner layout on flame merging probability and geometry. The results show that flame merging behavior with spacing can be divided into consistent, intermittent, and independent regimes, and burner layout affects the critical dimensionless spacing that distinguishes these regimes, due to differences in air flow fields.
FIRE SAFETY JOURNAL
(2021)
Article
Thermodynamics
Yueqiong Wu, Kuibin Zhou, Mengya Zhou, Mengyuan Huang, Chao Wang, Juncheng Jiang
Summary: A new facility was used to model the jet flame ejected from the ruptured tank, and the geometrical features of the flame and radiant heat fluxes on the tank surface were measured. Two thermal radiation models were established to predict the radiant heat flux field. The prediction of the models agreed well with the experimental measurements.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Forestry
Kuibin Zhou, Albert Simeoni
Summary: The temperature, height, and velocity of the fire plume are crucial factors in the heat transfer from a forest fire to tree crowns. This article proposes an analytical model to predict the properties of the fire plume and the crown scorch height, and analyzes the effects of fire distance, ambient temperature, and residence time on the fire. The findings have significant implications for preventing and controlling forest fires.
INTERNATIONAL JOURNAL OF WILDLAND FIRE
(2022)
Article
Engineering, Environmental
Kuibin Zhou, Xuan Nie, Chao Wang, Yandong Wang, Huichang Niu
Summary: Gas-solid jet fires exhibit characteristics of large lift-off height, low visible flame height, and low radiative fraction. Sand particles act as a heat sink to decrease flame temperature and burning velocity, as well as dilute gas fuel and isolate surrounding oxygen to inhibit combustion. These effects result in a large lift-off height, especially with smaller particle size sand.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Kuibin Zhou, Mengya Zhou, Mengyuan Huang, Yifan Wang
Summary: This paper presents a systematic investigation on the jet fire in a pit, including the variations of gas entrainment mode and flame behavior. A dimensionless heat release rate coupling the pit geometrical property is developed to correlate the flame area and length, which is validated by experimental data. Models for predicting the thermal radiation of the jet fire are proposed.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Thermodynamics
Yandong Wang, Kuibin Zhou, Xianzheng Ma, Ding Zhang
Summary: This study investigates the inhibition mechanism and effect of sodium bicarbonate on jet flame behavior. The experimental results show that sodium bicarbonate increases flame height but decreases flame temperature and radiative fraction. The jet flame is extinguished when the mass ratio of sodium bicarbonate to propane gas exceeds 2.12.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Ecology
Yifan Wang, Kuibin Zhou
Summary: Fire whirls occur frequently in both wilderness and urban areas, and their occurrence is influenced by ambient winds. However, little attention has been given to fire whirls on sloped fuel surfaces, despite their potential to greatly affect fire behavior. This study presents experimental research on fire whirls in sidewind line fires, focusing on their frequency of occurrence and height. The findings show that side winds increase the frequency of occurrence, while the velocity component parallel or perpendicular to the line fire has a competing effect. Additionally, the height of the fire whirls is reduced with an increase in slope, which can be explained by the mechanism of vortex generation and movement based on experimental data and existing literature.
Article
Thermodynamics
Kuibin Zhou
Summary: This paper investigates the effect of flow separation on the linear flame behavior in the presence of crosswind. The study includes experimental and numerical simulations, considering various factors such as burner rim distance, wind speed, and heat release rate. The results reveal the occurrence of a reverse flame along the upstream direction, caused by the interaction between flow separation and burning flame. The study also analyzes the impact of flow separation on flame geometry and presents a critical criterion for the appearance and disappearance of the reverse flame.
COMBUSTION AND FLAME
(2023)
Article
Energy & Fuels
Xia Shi, Kuibin Zhou
Summary: This paper presents an experimental investigation on the interaction of double turbulent jet flames with different spacings. It is found that flame buoyancy, exit momentum, and nozzle spacing significantly affect the flame merging behavior. A new dimensionless parameter is proposed to describe the merging probability of double jet flames dominated by flame buoyancy and exit momentum. A correlation is developed to predict the mean flame height of double jet fires.
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)
