Article
Thermodynamics
Supawit Homlakorn, Karthikeyan Velmurugan, Amnart Suksri, Tanakorn Wongwuttanasatian
Summary: This study develops novel PCM-infused finned and mesh finned containers to enhance the cooling effect of photovoltaic systems. The containers are integrated underneath the PV module and experimented in controlled indoor conditions. The results show that the metal mesh-based finned PCM container exhibits excellent performance enhancement with a peak cooling of 2.20% and corresponding increases in electrical power and energy productions of 2.01% and 2.71%, respectively. The statistical analysis reveals a strong positive correlation between ambient temperature and the temperature rise in photovoltaic systems, leading to performance degradation. It is recommended that these developed PCM containers are suitable for tropical climatic conditions to improve PV power output.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
S. Homlakorn, A. Suksri, T. Wongwuttanasatian
Summary: Passive cooling is a method to address the issue of increased temperature during operation of solar photovoltaic (PV) modules. Attaching a container filled with organic eutectic phase change material (PCM) to the back surface of the PV module can effectively reduce its temperature and enhance its performance.
Article
Thermodynamics
Hussein M. Maghrabie, A. S. A. Mohamed, Amany M. Fahmy, Ahmed A. Abdel Samee
Summary: In this study, the use of a phase change material (PCM) of paraffin wax RT-42 to cool a photovoltaic (PV) panel was experimentally investigated. The results showed that using PCM can reduce the uneven temperature distribution of the PV panel and increase the electrical efficiency of the panel.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Environmental Sciences
Mohamed Tahar Baissi, Mohamed Lebbi, Lyes Boutina, Abdelkrim Khelifa, Khaled Touafek
Summary: The aim of this study is to improve the energy performance of PV modules in the Ghardaia region of Algeria by using an additive phase change material (CaCl2·6H2O). Efficient cooling is achieved by reducing the operating temperature of the PV module's rear surface. It was found that using phase change materials enhances the energy performance and output power of PV modules by reducing their operating temperature. The average operating temperature is reduced by up to 20 degrees C, and the PV modules with PCM have an average power 46.11% higher than those without PCM. The electrical efficiency of PV modules with PCM is on average 6% higher than the configuration without PCM.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Yanfeng Liu, Yingya Chen, Dengjia Wang, Jingrui Liu, Xi Luo, Yingying Wang, Huaican Liu, Jiaping Liu
Summary: The study investigates the structural layout and parameter optimization of a PV cooling system which effectively reduces the surface temperature, increases power generation efficiency, and achieves maximum conversion and exergy efficiencies through exponential relationships with mass flow rate. Economic calculations show that the PV cooling system can increase power generation by 7%-15% in typical cities in China.
Article
Construction & Building Technology
Derun Zhang, Bello Muhammad Sani, Peixin Xu, Kai Liu, Fan Gu
Summary: This study aimed to develop a novel PCM-incorporated cooling asphalt pavement, which consists of a binary eutectic mixture of fatty acid PCMs, a supporting material, and a thermal conductivity enhancer. The test results showed that the pavement incorporated with this PCM composite is capable of effectively cooling asphalt pavement and alleviating its high-temperature rutting distress.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Akshayveer Akshayvee, Amit Kumar, Ajeet Pratap Singh, O. P. Singh
Summary: This study investigates a new design concept for photovoltaic panels with an attached overhead phase change material (PCM) enclosure, which enhances solar radiation utilization and increases energy storage density. With this design, the electrical conversion efficiency of photovoltaic panels can reach approximately 12%.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Engineering, Multidisciplinary
Mohamed Sharaf, A. S. Huzayyin, Mohamed S. Yousef
Summary: The study utilized a passive cooling technique involving an aluminum metal foam (AMF) with PCM to regulate the operating temperature of a PV system. Experimental results showed that the PV-PCM/AFM system significantly lowered the surface temperature of the PV panels and increased the power output of the system.
ALEXANDRIA ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Lu Liu, Xuelai Zhang, Xiaofeng Xu, Xiangwei Lin, Yi Zhao, Lingeng Zou, Yifan Wu, Huifan Zheng
Summary: The study prepared a DA-LA/EG composite phase change material with high thermal performance and stability, showing promising application prospects in vaccine cold chain logistics.
Article
Thermodynamics
Suhil M. Kiwan, Ali M. Khlefat
Summary: An effective photovoltaic thermal regulation technique using porous material confined at the backside of the panel is proposed in this study. Numerical thermal analysis and simulation studied the influence of different parameters on the conversion efficiency of the PV module, showing that increasing the porous fins and porous layer can enhance efficiency and reduce friction. Additionally, increasing the emissivity of the duct base wall can enhance the cooling effect.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Ahmet Aydin, Ismail Kayri, Huseyin Aydin
Summary: In this study, a new nanofluid-based collective cooling system with inner-plate heat fins was experimentally and mathematically analyzed to explore the efficiency of a photovoltaic-thermal (PV/T) system using Al2O3, TiO2, and CuO-based nanofluids. The effects of different ratios (0.2%, 0.4%, and 0.6%) and constant fluid flow rates on the electrical efficiency increase, panel surface temperature decrease, thermal efficiency increase, and heat transfer performance were investigated. The findings showed that the 0.2% nanofluid Al2O3-water had the highest electrical efficiency increase of 1.467%, corresponding to a 5.49% increase rate. The panel temperature drops were most significant for the 0.2% nanoparticles of Al2O3-water, TiO2-water, and CuO-water. The Al2O3-water nanofluid with 0.2% nanoparticles also had the highest thermal efficiency of 49.59% on average. For the 0.2% nanofluid cooling, the panel temperature drops were 13.28 °C, 11.64 °C, 11.06 °C, and 9.14 °C for TiO2-water, Al2O3-water, CuO-water nanofluid cooled panels, and water-cooled panel, respectively. It is recommended to use an appropriate amount of nanofluid cooling not exceeding 0.4% for practical application to improve system efficiency.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Review
Energy & Fuels
Kemal Bilen, Ismail Erdogan
Summary: The sun is the most important energy source for the world and solar energy can be converted to electricity using PV/T solar panels. The efficiency of PV/T solar panels is low due to temperature increase, which can be improved by cooling techniques. This comprehensive review study analyzes cooling techniques used in previous studies and presents the decrease in temperature and enhancement in electrical efficiency.
Article
Green & Sustainable Science & Technology
Jiasheng Dai, Feng Ma, Zhen Fu, Chen Li, Meng Jia, Ke Shi, Yalu Wen, Wentong Wang
Summary: The binary eutectic phase change material of stearic acid/palmitic acid has higher phase transition enthalpy and a more stable crystal structure, enhancing the anti-deforming capability of asphalt binder. However, encapsulating technologies must be adopted to prevent the deleterious impact of liquefiable phase change materials on the binder.
Review
Environmental Sciences
Sumit Tiwari, Muthukarupan Swaminathan, Santhosh S. Eashwar, Harender, Desh Bandhu Singh
Summary: This review paper discusses the importance of reducing solar cell temperature for the efficiency of PV systems and explores different cooling techniques. The study finds that PVT systems using nanofluids as a cooling medium have the best overall efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Energy & Fuels
H. Metwally, N. A. Mahmoud, M. Ezzat, W. Aboelsoud
Summary: The study developed two cooling models for photovoltaic panels, which are active and hybrid cooling systems. These systems have shown improvement in efficiency and power generation capabilities in various weather conditions.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Engineering, Electrical & Electronic
Bekkam Krishna, Gottapu Lithesh, V Karthikeyan
Summary: In this paper, a bidirectional DC-DC converter is proposed for onboard applications in electric vehicles, which interfaces a low terminal voltage battery with the DC bus of the motor. The proposed converter, based on a ladder switching network of inductors and a capacitor, has a simple structure and achieves high voltage gain with fewer components. Detailed comparative analysis, steady-state analysis, and working principles are presented, along with experimental results to verify the performance and feasibility of the proposed bidirectional converter.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Bekkam Krishna, V Karthikeyan
Summary: This paper proposes a novel non-isolated high-gain bi-directional DC-DC converter that meets the requirements of battery energy storage systems, fuel cells, and UPS applications. The converter, with a hybrid structure of switched capacitor and switched inductor techniques, achieves extreme voltage gain with fewer semiconductors and passive components.
INTERNATIONAL JOURNAL OF CIRCUIT THEORY AND APPLICATIONS
(2023)
Article
Energy & Fuels
Joshuva Arockia Dhanraj, Rami S. S. Alkhawaldeh, Pham Van De, V. Sugumaran, Najabat Ali, Natrayan Lakshmaiya, Prem Kumar Chaurasiya, S. Priyadharsini, Karthikeyan Velmurugan, Md Shahariar Chowdhury, Sittiporn Channumsin, Suwat Sreesawet, H. Fayaz
Summary: Wind energy is a valuable and reliable source of green energy. Regular monitoring of wind turbine blades can reduce downtime and enhance the reliability of wind energy generation.
FRONTIERS IN ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Wunvisa Tipasri, Amnart Suksri, Karthikeyan Velmurugan, Tanakorn Wongwuttanasatian
Summary: A study on an efficient chilled water tank design was conducted to reduce peak electricity consumption for air conditioning systems. By utilizing energy storage systems effectively, significant savings in electricity consumption and cost can be achieved.
Article
Energy & Fuels
Sarun Sirijuncheun, Varinrumpai Seithtanabutara, Kitirote Wantala, Tanakorn Wongwuttanasatian
Summary: Potassium impregnation enhances the thermal decomposition and reactions of biomass. This study investigated the addition of potassium carbonate (K2CO3) to sugarcane bagasse (SCB) and found that it significantly affects the cellulose structure and thermal decomposition temperature of SCB. The optimal conditions for K2CO3 pretreatment were determined using response surface methodology (RSM), resulting in improved torrefaction of SCB for biomass power plant applications.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Prasannaa Poongavanam, Aneesh A. Chand, Van Ba Tai, Yash Munnalal Gupta, Madhan Kuppusamy, Joshuva Arockia Dhanraj, Karthikeyan Velmurugan, Rajasekar Rajagopal, Tholkappiyan Ramachandran, Kushal A. Prasad, Shyamal Shivneel Chand, Shivnesh Raj, Kabir A. Mamun
Summary: Several studies suggest that phase change materials (PCMs) can enhance the power and efficiency of photovoltaic (PV) modules. This research examines multiple PCMs with different melting temperatures (31, 35, 37, and 42 degrees C) to identify the suitable PCM for tropical climates. The experimental results show that the selected PCMs autonomously facilitate the cooling process in all climates, with higher cooling rates observed for PCM with melting temperatures of 37 and 42 degrees C in summer. However, a single PCM melting temperature is inappropriate for year-round cooling in tropical climates, and a cascaded structure with different melting temperatures is recommended.
Article
Multidisciplinary Sciences
Vaithinathan Karthikeyan, James Utama Surjadi, Xiaocui Li, Rong Fan, Vaskuri C. S. Theja, Wen Jung Li, Yang Lu, Vellaisamy A. L. Roy
Summary: For decades, thermoelectric generators have been limited by heat stagnation and brittleness, which hampers power conversion efficiency and durability. However, by utilizing a cellular architecture with enhanced thermal impedance and partial carbonization for strength and ductility, we have developed 3D architected thermoelectric generators that exhibit high energy absorption and power conversion efficiency. Our work seeks to improve future thermoelectric generator designs by combining excellent thermoelectric properties with mechanical robustness through additive manufacturing.
NATURE COMMUNICATIONS
(2023)
Article
Thermodynamics
Supawit Homlakorn, Karthikeyan Velmurugan, Amnart Suksri, Tanakorn Wongwuttanasatian
Summary: This study develops novel PCM-infused finned and mesh finned containers to enhance the cooling effect of photovoltaic systems. The containers are integrated underneath the PV module and experimented in controlled indoor conditions. The results show that the metal mesh-based finned PCM container exhibits excellent performance enhancement with a peak cooling of 2.20% and corresponding increases in electrical power and energy productions of 2.01% and 2.71%, respectively. The statistical analysis reveals a strong positive correlation between ambient temperature and the temperature rise in photovoltaic systems, leading to performance degradation. It is recommended that these developed PCM containers are suitable for tropical climatic conditions to improve PV power output.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Multidisciplinary Sciences
S. Seralathan, G. Chenna Reddy, S. Sathish, A. Muthuram, Joshuva Arockia Dhanraj, Natrayan Lakshmaiya, Karthikeyan Velmurugan, Chatchai Sirisamphanwong, Rattapon Ngoenmeesri, Chattariya Sirisamphanwong
Summary: This study provides detailed information on the performance and exergy analysis of an inclined solar still with baffle arrangements. The aim is to improve the freshwater yield by increasing the contact time of brackish water with solar radiation. Experimental studies were conducted with two different mass flow rates, and it was found that an increase in water flow rate directly decreases the yield of fresh water. The highest accumulated fresh water yield achieved was 2.908 kg/m2 day in May. The study also compared the performance with other solar still designs and showed improvement in yield.
Article
Energy & Fuels
M. Arjun Jaikrishna, S. Naveen Venkatesh, V Sugumaran, Joshuva Arockia Dhanraj, Karthikeyan Velmurugan, Chatchai Sirisamphanwong, Rattaporn Ngoenmeesri, Chattariya Sirisamphanwong
Summary: The proposed research aimed to monitor wind turbine blades and identify fault conditions using a transfer learning approach. The study found that ResNet-50 outperformed other deep learning models, achieving an impressive accuracy rate of 99.00%. These findings highlight the potential of using deep learning models for wind turbine monitoring and fault detection, which could significantly improve the efficiency and reliability of wind turbines.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Chemistry, Multidisciplinary
Vaskuri C. S. Theja, Vaithinathan Karthikeyan, Sanjib Nayak, Kadir Ufuk Kandira, Dani S. Assi, Venkataramanan Kannan, Vellaisamy A. L. Roy
Summary: This study systematically investigated the effect of γ-Al2O3 nano-inclusions on ZnSb. The results showed that composite engineering reduced thermal conductivity through lattice phonon scattering and enhanced the Seebeck coefficient through low-energy carrier filtering. The figure of merit of the ZnSb+5% γ-Al2O3 sample at 673K was nearly two-fold higher than that of the pristine sample.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ganeshraja Ayyakannu Sundaram, Madhan Kuppusamy, Govindan Vadivel, Vaithinathan Karthikeyan, Kanchanok Emsaeng, Krishnamoorthy Anbalagan
Summary: Organic-metallic complexes can introduce ferromagnetism on the surface of TiO2, which has potential applications in the field of spintronics. The study reveals that even minor surface substitution of organic-metallic complexes can significantly enhance room temperature ferromagnetic ordering.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Vaskuri C. S. Theja, Dani S. Assi, Hongli Huang, Raghad Saud Alsulami, Bao Jie Chen, Chi Hou Chan, Chan-Hung Shek, Vaithinathan Karthikeyan, Vellaisamy A. L. Roy
Summary: This study reports the fabrication of 3D symmetric pyramidal architectural MXene composite films with frequency-selective stealth performance characteristics. The films exhibit substantial terahertz stealth performance due to the high absorption capability of 2D MXene layers. The 3D pyramidal microstructure design leads to frequency selective surface-assisted reflection resonance in the 0.6-1.1 THz frequency range.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Multidisciplinary Sciences
V. Seithtanabutara, N. Chumwangwapee, A. Suksri, T. Wongwuttanasatian
Summary: This study explores the use of natural dyes from different plants as sensitised dyes in dye-sensitised solar cells (DSSCs). The combination of pigments as sensitised dye offers advantages over using a single pigment, resulting in higher light absorption and energy band gap values. By combining dyes from Ivy gourd leaves and Turmeric, the DSSC efficiency was increased to 0.3%, suggesting that the dye co-sensitization strategy can improve the effectiveness of natural dyes in DSSCs.
Article
Energy & Fuels
Siddharth Sradhasagar, Omkar Subhasish Khuntia, Srikanta Biswal, Sougat Purohit, Amritendu Roy
Summary: In this study, machine learning models were developed to predict the bandgap and its character of double perovskite materials, with LGBMRegressor and XGBClassifier models identified as the best predictors. These models were further employed to predict the bandgap of novel bismuth-based transition metal oxide double perovskites, showing high accuracy, especially in the range of 1.2-1.8 eV.
Article
Energy & Fuels
Wei Shuai, Haoran Xu, Baoyang Luo, Yihui Huang, Dong Chen, Peiwang Zhu, Gang Xiao
Summary: In this study, a hybrid model based on numerical simulation and deep learning is proposed for the optimization and operation of solar receivers. By applying the model to different application scenarios and considering multiple performance objectives, small errors are achieved and optimal structure parameters and heliostat scales are identified. This approach is not only applicable to gas turbines but also heating systems.
Article
Energy & Fuels
Mubashar Ali, Zunaira Bibi, M. W. Younis, Muhammad Mubashir, Muqaddas Iqbal, Muhammad Usman Ali, Muhammad Asif Iqbal
Summary: This study investigates the structural, mechanical, and optoelectronic properties of the BaCuF3 fluoroperovskite using the first-principles modelling approach. The stability and characteristics of different cubic structures of BaCuF3 are evaluated, and the alpha-BaCuF3 and beta-BaCuF3 compounds are found to be mechanically stable with favorable optical properties for solar cells and high-frequency UV applications.
Article
Energy & Fuels
Dong Le Khac, Shahariar Chowdhury, Asmaa Soheil Najm, Montri Luengchavanon, Araa mebdir Holi, Mohammad Shah Jamal, Chin Hua Chia, Kuaanan Techato, Vidhya Selvanathan
Summary: A novel recycling system is proposed in this study to decompose and reclaim the constituent materials of organic-inorganic perovskite solar cells (PSCs). By utilizing a one-step solution process extraction approach, the chemical composition of each layer is successfully preserved, enabling their potential reuse. The proposed recycling technique helps mitigate pollution risks, minimize waste generation, and reduce recycling costs.
Article
Energy & Fuels
Peijie Lin, Feng Guo, Xiaoyang Lu, Qianying Zheng, Shuying Cheng, Yaohai Lin, Zhicong Chen, Lijun Wu, Zhuang Qian
Summary: This paper proposes an open-set fault diagnosis model for PV arrays based on 1D VoVNet-SVDD. The model accurately diagnoses various types of faults and is capable of identifying unknown fault types.
