Article
Energy & Fuels
Haoshan Ren, Yongjun Sun, Ahmed K. Albdoor, V. V. Tyagi, A. K. Pandey, Zhenjun Ma
Summary: This study investigates the energy flexibility of a net-zero energy house using solar-assisted air conditioning system, thermal energy storage, and demand-side management strategies. Results showed that using DSM strategies and TES unit can significantly increase solar contribution and improve energy efficiency.
Article
Green & Sustainable Science & Technology
Arash Kazemian, Meysam Khatibi, Soroush Entezari, Tao Ma, Hongxing Yang
Summary: This study proposes a photovoltaic thermal system with a solar thermal collector enhancer and phase change materials for electricity and thermal power generation. Results show that selecting appropriate phase change materials under different weather conditions can improve system performance and thermal energy storage.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Review
Energy & Fuels
Surajudeen Sikiru, Temidayo Lekan Oladosu, Temitope Ibrahim Amosa, Sanusi Yekinni Kolawole, Hassan Soleimani
Summary: This study provides a cutting-edge review of recent literature on thermal energy storage systems for solar thermal management. It also gives an in-depth overview of solar thermal storage mechanisms and reviews the application of phase change materials (PCM) and photovoltaic performance indicator variables. The study summarizes the research trend and research gap in PCM adoption to photovoltaic energy harnessing.
JOURNAL OF ENERGY STORAGE
(2022)
Review
Chemistry, Physical
Praveen Kumar Tyagi, Rajan Kumar, Zafar Said
Summary: This paper provides a comprehensive review of the use of nanofluids and nano-enhanced phase change materials for thermal energy storage applications in PV/T systems. It emphasizes the impact of nanomaterials on thermophysical properties and highlights the critical selection criteria for phase change materials in TES applications. The paper also discusses the potential future research directions in this field, aiming to enhance the thermal performance of nanomaterial-based PV/T systems.
Article
Thermodynamics
Ahmed T. Hamada, Omar Z. Sharaf, Mehmet F. Orhan
Summary: This study explores the use of nano-encapsulated phase-change material dispersion in a double-pass photovoltaic/thermal solar collector, providing optical filtering, heat transfer, and energy storage functions. The performance of the system is analyzed under different conditions, and compared to alternative configurations, showing lower cell temperatures and improved thermal and electrical performance. This research opens up possibilities for novel PV/T collectors using smart, multi-functional fluids.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Construction & Building Technology
Mahendran Samykano
Summary: The article discusses the growing energy requirements in modern life and the concerns about its environmental impact and rising costs. It explores the potential of photovoltaic thermal systems (PVT) in capturing electrical and thermal energy from solar radiation. The application of phase change materials and nano-improved phase change materials (NEPCMs) in PVT systems is examined for optimizing energy extraction. The article provides a comprehensive overview of PVT techniques and their advantages, such as reduced electricity consumption and enhanced thermal comfort. The integration of NEPCMs in PVT systems shows superior thermal performance and the potential to mitigate CO2 emissions compared to conventional PV systems.
Article
Thermodynamics
Achutha Tamraparni, Alison Hoe, Michael Deckard, Chen Zhang, Nathan Malone, Alaa Elwany, Patrick J. Shamberger, Jonathan R. Felts
Summary: Phase change materials store thermal energy as latent heat and can be combined with high thermal conductivity metals to create composites with high power density and large energy storage capacity. This study provides a theoretical framework to design and optimize cylindrical composites with three figures of merit - minimization of temperature rise, maximization of effective volumetric heat capacity, and maximization of effective heat capacity based on mass.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Thermodynamics
Taysir Mhedheb, Walid Hassen, Abdallah Mhimid, Mohammed A. Almeshaal, Muapper Alhadri, Lioua Kolsi
Summary: This study validates the incorporation of paraffin phase change materials (PCMs) in a storage tank as a means to significantly prolong the operational duration of solar systems. Additionally, the addition of 1% concentration of hybrid nanoparticles enhances the storage tank temperature and reduces the melting time.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Guozhu Li, Shuai Wang, Huixing Li, Qingqin Wang, Kailiang Huang, Chenjun Ding
Summary: A novel solar collector with both heat storage function and concentrating effect was proposed in this study, which combines the compound parabolic concentrator, phase change heat storage cores, and vacuum tube solar air collector. The heat transfer principles and thermal performance of the collector were illustrated through theoretical analysis and experimental investigation. The results showed that the collector not only increased the heat-collecting temperature and efficiency but also extended the heating time, with improvements in maximum output temperature, maximum transient efficiency, and heating time. This study can serve as a reference for future research on multi-technology integrated collectors.
APPLIED THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Vednath P. Kalbande, Pramod Walke, Kishor Rambhad
Summary: The combination of oil-based thermal energy storage system with solar collector is popular due to its simple design and suitability for various domestic applications, although there is a temperature range limitation.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Andreas Thangam, Amar Auckaili, Mohammed Farid
Summary: This study investigated the impact of individual and combination of different sources of heating in a building containing phase change material (PCM) for a potential reduction in energy consumption while maintaining thermal comfort. The study found that combining active and passive solar heating with temperature-controlled electric oil heater can provide significant energy savings and maintain thermal comfort.
Article
Energy & Fuels
Dongyao Zhang, Chuanchang Li, Niangzhi Lin, Baoshan Xie, Jian Chen
Summary: Composite phase change materials were synthesized from KH-550-decorated mica and poly-ethylene glycol by vacuum impregnation method, with the addition of expanded graphite to improve thermal conductivity and storage capacity. The Md/EG/PEG composite showed enhanced thermal stability and potential for energy conservation in buildings.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Thermodynamics
Dario Guarda, Jorge Martinez-Garcia, Benjamin Fenk, David Schiffmann, Damian Gwerder, Anastasia Stamatiou, Jorg Worlitschek, Simone Mancin, Philipp Schuetz
Summary: To understand and monitor the phase-change behavior of Phase Change Materials (PCMs), a new method for measuring liquid fraction is proposed in this study. By using X-ray Computed Tomography (XCT), the solidification process of eicosane was dynamically studied and the volumetric liquid fraction was extracted. A CFD model based on the enthalpy-porosity method was implemented to simulate the solidification of eicosane, and the numerical results showed excellent agreement with the experimental data. This novel experimental methodology opens new possibilities to characterize and understand the solid-liquid phase transition process of PCMs.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Energy & Fuels
Chunlei Wu, Qing Wang, Shipeng Sun, Xinmin Wang, Da Cui, Shuo Pan, Hongyu Sheng
Summary: In this study, NaCl-KCl-NaF/nanoparticles composite phase change materials (CPCMs) were used to improve thermal conductivity and energy density in high-temperature thermal energy storage systems. The addition of CuO and Al2O3 nanoparticles resulted in a significant enhancement in thermal properties and a reduction in cost per unit of energy density. The CPCMs exhibited excellent operating temperature range and thermal stability.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Green & Sustainable Science & Technology
Hassan Olfian, Seyed Soheil Mousavi Ajarostaghi, Mohammadreza Ebrahimnataj, Mousa Farhadi, Muslum Arici
Summary: The aim of this study is to analyze a U-type evacuated tube solar collector that utilizes phase change material to store and reuse solar energy. Both charging and discharging processes are considered and modeled. The results show that the case with 6 mm diameter yields the best performance in terms of liquid fraction and fluid outlet temperature during both charging and discharging processes.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Xinlei Zhou, Wenye Lin, Ritunesh Kumar, Ping Cui, Zhenjun Ma
Summary: This paper presents a new strategy that integrates LSTM models and RL agents to forecast building electricity consumption. Results show that the proposed strategy can significantly improve prediction accuracy for buildings with large monthly variations in electricity consumption, while showing less improvement for those with insignificant variations.
Article
Energy & Fuels
Haoshan Ren, Zhenjun Ma, Alan Ming Lun Fong, Yongjun Sun
Summary: This study proposes a strategy to use rooftop solar photovoltaics (PV) and batteries to power electric buses in high-density cities like Hong Kong. By optimizing the deployment, the strategy achieves the shortest payback period and effectively addresses design issues. The study also utilizes 3D-GIS and DL technology to obtain accurate solar power generation profiles, and verifies the effectiveness of the strategy through a real case study.
Article
Computer Science, Interdisciplinary Applications
Shugang Wang, Shuang Jiang, Zhenjun Ma, Jihong Wang, Jinling Zhao, Tengfei Zhang, Xiaozhou Wu, Lin Duanmu
Summary: The integration of research and teaching in engineering education is a significant challenge. By incorporating academic research into teaching methodologies, students' learning experience and understanding can be enhanced.
COMPUTER APPLICATIONS IN ENGINEERING EDUCATION
(2022)
Article
Construction & Building Technology
Haiguo Yin, Daina Ji, Yuanyuan Wang, Yaokun Huo, Xin Deng, Jiali Wang, Zhenjun Ma, Angui Li
Summary: Column attachment ventilation mode (CAV) is a new form of air distribution that utilizes the Coanda effect to efficiently transport air from the top of a room to the lower occupied zone. This study investigated the movement and diffusion characteristics of particulate matter (PM) in CAV mode. The results showed that particles of different sizes had different behaviors, and the air supply temperature difference had a significant impact on PM distribution.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Energy & Fuels
Shengqi Zhang, Liang Pu, Simone Mancin, Zhenjun Ma, Lingling Xu
Summary: This study investigates the effects of material types, structural parameters, and heating configurations on the melting front, heat transfer characteristics, and temperature distribution of metal foam/paraffin composite phase change materials (PCMs) in large cavities. The results provide insights into the heat transfer mechanisms during the melting process and a correlation to model the melting process of the composite PCMs.
Article
Energy & Fuels
Haoshan Ren, Zhenjun Ma, Chung Fai Norman Tse, Yongjun Sun
Summary: Developing solar-powered electric bus networks can help address energy and environmental challenges in high-density cities. However, the mismatch between PV power generation and bus charging demand presents a charging control issue. This study proposes a control strategy to improve renewable energy consumption and reduce grid dependence in solar-powered electric bus networks.
Article
Green & Sustainable Science & Technology
Saboor Shaik, Chelliah Arumugam, Sharmas Vali Shaik, Muslum Arici, Asif Afzal, Zhenjun Ma
Summary: The global energy demand in the building sector has increased, with air conditioning being a major consumer. Net-zero or green buildings are crucial for a sustainable future. This study investigates the cost-saving potential of using phase change materials (PCMs) in a duplex house, and finds that the best results are obtained with the outer side PCM layer brick with OM29 PCM.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Haoshan Ren, Zhenjun Ma, Antoni B. Chan, Yongjun Sun
Summary: This study proposes an optimal planning strategy for distributed rooftop PV systems in high-density cities. By using high-accuracy solar energy potentials and integer learning programming, the strategy effectively identifies suitable rooftops for PV installations, maximizing performance and cost-efficiency.
Article
Thermodynamics
Linfeng Liang, Haiguo Yin, Da Zhang, Yuekun Han, Yanyan Li, Jingying Zhang, Yongshou Zhang, Zhenjun Ma, Angui Li
Summary: This study investigates the intrusion of outdoor pollutants into sentry buildings and compares the isolation effects of internal circulation with double-attached ventilation (IC-DAV) and external circulation with double-attached ventilation (EC-DAV) modes with natural ventilation. Computational fluid dynamics simulations were used to analyze the transportation and distribution of pollutants under different wind directions, velocities, and ventilation modes. The results show that both IC-DAV and EC-DAV modes can effectively isolate outdoor pollutants, with EC-DAV mode demonstrating better performance.
BUILDING SIMULATION
(2023)
Article
Energy & Fuels
Muhammad Bilal Awan, Zhenjun Ma, Wenye Lin, A. K. Pandey, V. V. Tyagi
Summary: This paper presents a methodological approach using the weighted product method (WPM) and analytical hierarchy process (AHP) to rank and select phase change materials (PCMs) for thermal energy storage in building applications. Two case studies were conducted to test and evaluate the effectiveness of this approach, and the results demonstrated its validity.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Zhihua Wang, Guichen Li, Yujia Zhang, Fenghao Wang, Xin Jiang, Zhenjun Ma
Summary: In this study, a novel biomimetic honeycomb fractal heat exchanger is proposed for high heat transfer efficiency and increased structural stability in gas coolers. The conjugate heat transfer between supercritical CO2 and water is investigated numerically. The results show that the heat transfer coefficients of CO2 vary significantly in different flow channels and locations, especially near the supercritical region. A new correlation for supercritical CO2 is developed based on thermophysical parameters, buoyancy, and hydraulic diameter.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Review
Energy & Fuels
Sudhir Kumar Pathak, V. V. Tyagi, K. Chopra, B. Kalidasan, A. K. Pandey, Varun Goel, Abhishek Saxena, Zhenjun Ma
Summary: Solar air heating is widely used for crop drying, building and space heating due to its maturity and economic viability. The fluctuating nature of solar energy and the lack of energy storage units have limited the performance of solar air heaters (SAHs). Phase change materials (PCMs) have been employed to store solar energy and enhance the effectiveness of SAHs during non-sunshine hours. This review article presents recent studies on the analysis of various SAH systems integrated with and without PCMs, focusing on energy, exergy, exergoeconomic, and envir-oeconomic aspects.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Materials Science, Multidisciplinary
Chuan Sun, Yuancheng Geng, Adam Glowacz, Maciej Sulowicz, Zhenjun Ma, Patrick Siarry, Munish Kumar Gupta, Z. Li
Summary: This study investigated the impact of a magnetic field on the heat transfer of Fe3O4 ferrofluid swirl flow. The results showed that applying the magnetic field at different locations improved the convective heat transfer coefficient and reduced the absorber tube temperature, but increased the pressure drop over the tube.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Engineering, Multidisciplinary
Xinhua Liu, Peng Qi, Patrick Siarry, Dezheng Hua, Zhenjun Ma, Xiaoqiang Guo, Orest Kochan, Z. Li
Summary: This paper proposes an improved multiscale neural network method for face recognition in underground coal mining to address the issues of overstaffing and incomplete information. Experimental results show that the proposed method can accurately recognize miners in harsh environments.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Construction & Building Technology
Yujia Zhang, Zhihua Wang, Pengfei Zhang, Xin Jiang, Fenghao Wang, Chao Huan, Zhenjun Ma
Summary: This paper investigates the exergy analysis of a transcritical CO2 air-source heat pump system with a novel honeycomb gas cooler. By establishing the exergy model of each component in the heat pump system and analyzing the irreversible losses, the energy utilization of the system is evaluated. The results show that there is significant room for improvement in the system's energy efficiency, with the compressor, throttle valve, and evaporator being the main contributors to irreversible losses.
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)
