Article
Thermodynamics
Yang Liu, Ruowei Zheng, Tong Tian, Ji Li
Summary: A novel thermal storage heat pipe charged with phase change material and graphene nanoplatelets was designed to improve thermal management and sustainability.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Thermodynamics
Hitesh Khurana, Rudrodip Majumdar, Sandip K. Saha
Summary: The geometrical shapes of thermal energy storage and the configurations of immersed discharging coils have a significant impact on the effectiveness of low-to-medium temperature hot water applications. This study uses a three-dimensional numerical model to analyze the thermal characteristics of three storage configurations for simultaneous charging and discharging. Results show that the paraboloidal tank with a conical discharging coil configuration exhibits the best system reliability and energy management, leading to more efficient heat dispatch controllability.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
S. Venkatraman, P. Jidhesh, J. David Rathnaraj, C. Selvam
Summary: This article explores the discharging process of phase change materials in latent heat energy storage systems to maintain the temperature of water. Copper tubes and steatite nanoparticles are used to enhance the discharging characteristics of phase change materials. The experimental results show that nano-phase change materials have the potential to maintain water temperature for a specific duration, which is cost-effective.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Javid Zamani, Ali Keshavarz
Summary: Nowadays, the world is facing an energy crisis, with residential buildings in developed countries accounting for a significant portion of global energy demand. To achieve sustainable energy systems, it is crucial to reduce energy consumption in this sector. The use of phase change materials (PCMs) in energy systems is identified as one of the feasible solutions. This study focuses on investigating the application of PCMs in a dual-pipe latent heat exchanger system for thermal energy storage, with the aim of optimizing the charging and discharging operations to enhance energy efficiency and minimize exergy destruction.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Energy & Fuels
Ossama Abou Saima, Ahmed A. Abdel-Rehim
Summary: Phase Change Materials (PCMs) are used in thermal energy storage to address the lack of heat gain during night hours in solar thermal collectors. This study focuses on evaluating the charging and discharging period of PCM in water storage and determining the optimum size for efficient system performance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Hitesh Khurana, Rudrodip Majumdar, Sandip K. Saha
Summary: This study experimentally investigates the simultaneous charging and discharging mode in a vertical cylindrical thermal energy storage (TES) tank. The results show that the primary thermocline splits and a secondary thermocline forms during the charging and discharging process. The presence of the secondary thermocline decreases as the charging flow rate increases. The discharging efficiency and thermal energy stored depend on the specific charging and discharging conditions. These modes provide operational flexibility and heat content dispatch controllability.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Mohammed A. Almeshaal, R. Y. Sakr
Summary: A numerical study was conducted to investigate the dynamic behavior of a packed bed filled with Al2O3 nanoparticles as an enhanced phase change material (NEPCM) for ice storage in air conditioning systems. The study used a two-dimensional axisymmetric time-dependent model to simulate the heat transfer between the NEPCM and the coolant. The effects of nano-particle volume concentration, coolant mass flow rate, and coolant inlet temperature were investigated, and the variation of solidified volume fraction, cool energy stored, bed temperature, and coolant exit temperature were predicted.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Cancan Zhang, Yuanwei Lu, Suli Shi, Yuting Wu
Summary: The study focuses on the single tank molten salt thermal energy storage system utilizing binary nitrates as the heat storage medium. Various inlet velocity conditions were tested, with the results showing different effects on heat discharging power and time. Proposed correlations between inlet velocity and heat discharging time provide insights for practical design of the system.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Energy & Fuels
Maryam Fallah Najafabadi, Mousa Farhadi, Hossein Talebi Rostami
Summary: This research investigates the application of a 3-D double-pipe helical coil heat exchanger containing Phase-Change Material (PCM) as a thermal storage system in solar water heaters. The study reveals that the inlet temperature and inner and outer pipe diameter are critical factors for the design of the storage system.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
M. K. Saranprabhu, K. S. Rajan
Summary: This study evaluates the charging and discharging characteristics of solar salt and nanoparticle enhanced solar salt. The addition of copper nanoparticles and reduced Graphene Oxide nanostructures improves the overall heat transfer coefficients of the thermal energy storage system. This enhancement makes them suitable for integration with process preheating applications.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Soroush Entezari, Amin Taheri, Meysam Khatibi, Hamid Niazmand
Summary: This study introduces a novel triplex-tube helical-coil thermal energy storage unit and utilizes numerical simulations to assess its performance, showing a significant reduction in melting time compared to conventional units. A tilt angle of 0 degrees demonstrates the best performance, and the addition of Al2O3 nanoparticles to PCM proves to be the most effective in reducing melting time.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Zhigao Sun, Zhifan Chen, Mingrui Liu
Summary: Composite phase change materials with improved thermal conductivity were prepared by melt blending method, enhancing the thermal conductivity and latent heat of stearic acid and octadecyl alcohol eutectic mixtures. In the phase change process, heat conduction and natural convection work together, with natural convection playing a crucial role in the melting process and heat conduction being essential in the discharging process.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
R. A. Nicholls, M. A. Moghimi, A. L. Griffiths
Summary: This study investigates the impact of fin type and orientation on the charging and discharging processes of a horizontal concentric filled with phase change material. The results show that the performance is significantly improved with the use of transversal corrugated fin design. The melting process is mainly influenced by natural convection, while conduction is the main mode of heat transfer in the solidification process. The transversal corrugated fin design outperforms other cases in terms of melting time reduction, and the overall processing time is significantly shorter.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Hamidreza Behi, Mohammadreza Behi, Ali Ghanbarpour, Danial Karimi, Aryan Azad, Morteza Ghanbarpour, Masud Behnia
Summary: The utilization of phase change materials' latent heat for thermal energy storage applications has been investigated. Low thermal conductivity of PCM is a common disadvantage in utilizing latent heat thermal energy storage, impacting the rate of energy storage. This paper explores the use of a tubular heat pipe as a super heat conductor to increase the charging/discharging rate, demonstrating significantly improved energy transfer between a water bath and PCM in the working temperature range.
Article
Energy & Fuels
Weimin Guo, Zhaoyu He, Ashmore Mawire, Peng Zhang
Summary: The study investigates the performance of a packed bed thermal energy storage (PBTES) system with cascaded phase change material (PCM) for waste heat recovery. A concentric dispersion model is developed and validated, finding that the volumetric ratio of hydroquinone: adipic acid: erythritol = 3:6:1 is the best configuration for the cyclic charging and discharging processes. The cascaded PBTES system achieves higher heat transfer rate compared to non-cascaded system, with an increase of 6.96% in average heat transfer rate for the volumetric ratio of 3:6:1.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Construction & Building Technology
Zhi Chen, Menghao Qin, Jun Yang
ENERGY AND BUILDINGS
(2015)
Article
Construction & Building Technology
Zhi Chen, Di Su, Menghao Qin, Guiyin Fang
ENERGY AND BUILDINGS
(2015)
Article
Thermodynamics
Zhi Chen, Menghao Qin
APPLIED THERMAL ENGINEERING
(2016)
Article
Environmental Sciences
Wei You, Zhi Gao, Zhi Chen, Wowo Ding
Article
Engineering, Chemical
Zhi Chen, Feng Shan, Gui-Yin Fang
CHEMICAL ENGINEERING & TECHNOLOGY
(2012)
Article
Construction & Building Technology
Zhi Chen, Lei Cao, Feng Shan, Guiyin Fang
ENERGY AND BUILDINGS
(2013)
Article
Thermodynamics
Zhi Chen, Lei Cao, Guiyin Fang, Feng Shan
NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING
(2013)
Article
Physics, Applied
Yu Gu, Zhi Chen, Leyi Chen
APPLIED PHYSICS EXPRESS
(2020)
Article
Engineering, Electrical & Electronic
Li Ling, Rongkang Zhu, Yu Gu, Zhi Chen
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Rongkang Zhu, Dawei Hu, Zhi Chen, Xiaobao Xu, Yousheng Zou, Lin Wang, Yu Gu
Proceedings Paper
Construction & Building Technology
Mingjie Zhang, Menghao Qin, Zhi Chen
10TH INTERNATIONAL SYMPOSIUM ON HEATING, VENTILATION AND AIR CONDITIONING, ISHVAC2017
(2017)
Proceedings Paper
Construction & Building Technology
Zhimin Wu, Menghao Qin, Zhi Chen
10TH INTERNATIONAL SYMPOSIUM ON HEATING, VENTILATION AND AIR CONDITIONING, ISHVAC2017
(2017)
Proceedings Paper
Construction & Building Technology
Menghao Qin, Zhi Chen
MATERIALS & ENERGY I (2015) / MATERIALS & ENERGY II (2016)
(2017)
Article
Thermodynamics
Mingjie Zhang, Menghao Qin, Carsten Rode, Zhi Chen
APPLIED THERMAL ENGINEERING
(2017)
Proceedings Paper
Construction & Building Technology
Zhi Chen, Menghao Qin
6TH INTERNATIONAL BUILDING PHYSICS CONFERENCE (IBPC 2015)
(2015)
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)