Article
Thermodynamics
Lili Wang, Yuzhu Zhang, Haibin Ke, Yue Long
Summary: The gas quenching dry slag granulation technique is effective in efficient waste heat recovery, with smaller particle diameter and lower fiber mass fraction contributing to higher recovery rates. High temperature experiments showed the significant impact of airflow velocity and molten slag mass flow rate on granulation characteristics.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Huining Zhang, Jianping Dong, Chao Wei, Caifang Cao, Zuotai Zhang
Summary: The integration consideration of end-point reproductions like molten slag waste heat recovery and resourceful disposal plays a significant role in establishing an economical and environmental circular network system for wastes. The review discusses the limitations and priorities of prevailing heat recovery processes, such as physical or chemical methods, and proposes a collaborative approach combining physical and chemical methods for efficient energy recovery. Additionally, a cleaner routine of molten slag-waste plastics system is proposed for triple targets of carbon dioxide storage, energy conservation, and establishing an economical and environmental circular network system in steelmaking plants.
Article
Geochemistry & Geophysics
Aifu Zhao, Yuhua Pan, Ming Zhao, Shili Zhang, Ping Ma, Xin Feng
Summary: In this study, a three-dimensional transient computational fluid dynamics (CFD) model was used to investigate the breakup process of molten blast furnace slag ligaments into droplets by centrifugal granulation with a spinning cup. The simulations revealed the formation of slag ligaments at the cup edge and their subsequent disintegration into droplets. The results showed that increasing the cup spinning speed led to a decrease in slag film thickness, an increase in the number of ligaments, and a reduction in ligament diameter, resulting in smaller droplets. Additionally, the increased spinning speed also caused a decrease in ligament length due to the reduced flow rate of a single ligament. Furthermore, the behavior and mechanism of a single ligament breakup into droplets were investigated, and it was found that the process could be approximately explained by the Rayleigh disintegration mechanism.
Article
Green & Sustainable Science & Technology
Ningwen Xu, Jun Zhao, Xi Zhang, Meiquan Li, Chen Ma, Zhiqiang Wu, Haiyu Meng, Shuzhong Wang
Summary: This paper conducted a numerical simulation to analyze the spreading characteristics of liquid film in the process of waste heat recovery. The results showed that parameters such as rotation speed, slag flow rate, and slag temperature had a significant influence on the thickness of the liquid film.
JOURNAL OF SUSTAINABLE METALLURGY
(2022)
Article
Thermodynamics
Meiquan Li, Jun Zhao, Xi Zhang, Ningwen Xu, Haiyu Meng, Zhiqiang Wu, Shuzhong Wang
Summary: The inclination of the inner wall surface of the rotating cup can strengthen the granulation effect within the range of 0-45 degrees. To ensure proper granulation, the ratio of the diameter of the slag tube to the rotating cup should not exceed 0.44, and the height of the slag tube should be as close as possible to the granulator. Additionally, keeping the slag eccentricity within 5% ensures uniform particle size after granulation.
APPLIED THERMAL ENGINEERING
(2021)
Article
Engineering, Chemical
Zhongyuan Liu, Qingbo Yu, Weidong Ma, Junxiang Liu, Shengkai Tao
Summary: Centrifugal granulation with waste recovery was proposed to recover waste heat from molten yellow phosphorus slag produced by an electric arc furnace and reduce pollution. The study investigated the effect of operating parameters on particle diameter distribution, flight distance distribution, and fiber mass fraction during the granulation process. The results showed that the average diameter was mainly 1.5-3 mm and obeyed a log-normal distribution. Increasing the rotating speed and the rotary cup diameter dispersed the average flight distance and the distribution of flight distance. Increasing slag temperature, mass flow rate, and decreasing rotary cup diameter can reduce the fiber mass fraction.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Energy & Fuels
Yi-Wen Lv, Xun Zhu, Hong Wang, Mao-Lin Dai, Yu-Dong Ding, Jun-Jun Wu, Qiang Liao
Summary: This study proposed a new method combining water and air cooling to eliminate particle adhesion during heat recovery, and an experimental hybrid cooling system was built to demonstrate excellent anti-adhesion performance.
Article
Metallurgy & Metallurgical Engineering
Ri-jin Cheng, Hua Zhang, Yang Li, Qing Fang, Bao Wang, Hong-wei Ni
Summary: Dry centrifugal granulation method can granulate blast furnace slag, but the granulation results are easily affected by parameters such as slag flow rate, disk rotating speed, and material. The optimal parameters can produce round particles with a diameter of 3.43 mm.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2021)
Article
Metallurgy & Metallurgical Engineering
Yu Tan, Xun Zhu, Hong Wang, Yi-Wen Lv, Yu-Dong Ding, Qiang Liao
Summary: A novel stacked rotary cup atomizer (SRCA) was proposed for high-quality centrifugal granulation performance with large slag flow rate, showing excellent granulation performance in producing smaller particles and suppressing slagging. Compared to a typical rotary cup atomizer, the SRCA achieved a significant reduction in average particle size and slagging mass fraction by 28.1% and 71.1% respectively.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Engineering, Chemical
Yu Tan, Bin Ding, Jun Shi, Hui Yan, Yingchun Wu, Junjun Wu
Summary: This study successfully simulated the granulation process of centrifugal particulate materials at large flow rates by establishing an improved model, and film fragmentation was reproduced for the first time. The film fragmentation mechanism under different operational conditions was investigated by quantifying the characteristics of the off-atomizer film. This study provides an important computational fluid dynamics model for studying the underlying physics of film fragmentation, and opens up new possibilities for predicting droplet formation of materials under experimentally unavailable conditions.
Article
Green & Sustainable Science & Technology
Huihui Du, Dong Xu, Xin Li, Jiajie Li, Wen Ni, Ying Li, Pingfeng Fu
Summary: A new type of low-carbon emission cementitious material composed of desulfurization slag, ground granulated blast furnace slag, steel slag, and flue gas desulfurization gypsum was proposed. The results showed that desulfurization slag reduced the fluidity of mortar but significantly improved the compressive strength. The optimal ratio of desulfurization slag to steel slag was 1:1, and the compressive strength of the material at 3 days and 28 days reached 24.6 and 52 MPa, respectively. The high alkalinity of desulfurization slag promoted the early hydration reaction and increased the polymerization degree of the gel. Additionally, the high porosity caused by desulfurization slag could be offset by the gel pores generated by steel slag.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Geochemistry & Geophysics
Ming Zhao, Yuhua Pan, Aifu Zhao, Shili Zhang, Ping Ma, Xin Feng
Summary: In this study, a three-dimensional CFD model was established to simulate the breakup of a single water ligament into droplets and compared with the breakup process of a molten slag ligament due to centrifugal force. The results show that the behavior of molten slag ligament breakup is very similar to that of water or liquid paraffin ligaments and both follow the Rayleigh Disintegration Mechanism. This provides a theoretical basis for analyzing the breakup process of different liquid ligaments and guiding the centrifugal granulation of molten slag.
Article
Engineering, Chemical
Yaqiong Li, Zhengtao Li, Lifeng Zhang, Xin Wen, Changyu Ren, Yunlong Yu
Summary: By using a CaO-51mol%SiO2-15mol%MgO slag, Si was successfully recovered from Si sawing waste, and the feasibility of applying slag refining technique to SiC particle removal was confirmed by measuring contact angles and observing SiC particle behaviors and dissolution with high-temperature laserscanning confocal microscopy.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Kuosheng Jiang, Sai Chen, Zhixiong Li, Tianbing Ma, Jie Ren, Zhongyuan Mao
Summary: This paper presents a novel sensor system for measuring the instantaneous angular speed of a reciprocating rotary shaft. The system utilizes a laser displacement sensor and an S-shaped cylindrical cam sleeve to modulate the angular speed signal. Experimental results show that the sensor system is accurate and reliable, and it is capable of optimizing the parameters of a vibration-assisted tapping machine.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Review
Chemistry, Multidisciplinary
Yuelong Yu, Xinjie Bai, Shaoyuan Li, Jianghao Shi, Lei Wang, Fengshuo Xi, Wenhui Ma, Rong Deng
Summary: The photovoltaic industry is rapidly developing, and recycling secondary silicon resources can enhance economic value and reduce environmental impacts.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2023)
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)