Article
Materials Science, Ceramics
Hanyu Zhao, Wenjun Cao, Cen Liang, Changyuan Wang, Chunchang Wang
Summary: KaTaO(3) (KT) modified Na0.5Bi0.5TiO3-BaTiO3 lead-free ceramics were fabricated and the effect of KT modification on the structural, dielectric, and energy-storage properties of the ceramics were investigated. The results show that the modified ceramics have excellent thermal stability, low loss, and achieve large energy storage density and ultrafast discharge rate. This work suggests that the modified ceramics could be promising materials for pulsed electrical applications in extreme environments.
CERAMICS INTERNATIONAL
(2023)
Article
Construction & Building Technology
Chang Chen, Xufu Wang, Fentian Ma, Yubin Wang, Shaowu Jiu, Yanxin Chen
Summary: The study focuses on the preparation of modified SAT-urea eutectic salts (EPCM) as phase-change materials using modifiers like disodium hydrogen phosphate dodecahydrate (DHPD) and carboxymethyl cellulose (CMC). The hydrophilic modified activated carbon (MAC) was used as the support material and the vacuum impregnation method was adopted to fabricate shape-stabilized eutectic phase-change materials (SSEPCM) based on MAC. Gypsum-based building materials with thermal storage capacity were obtained through compositing SSEPCM and gypsum.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Osman Gencel, Gokhan Hekimoglu, Ahmet Sari, Abid Ustaoglu, Serkan Subasi, Muhammed Marasli, Ertugrul Erdogmus, Shazim Ali Memon
Summary: A comprehensive study on the fabrication and characterization of gypsum plasterboards combined with microencapsulated phase change material (mPCM) reveals their potential in thermoregulation management and energy saving in buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Materials Science, Ceramics
Shuo Liu, Wuwei Feng, Jinhong Li, Bin He, Zhidi Bao, Changchun Zhao, Xuezhu Luan, Yi Zhong
Summary: In this study, the introduction of bismuth layer-structured Bi2LaTiNbO9 (BLTN) into the BiFeO3-BaTiO3 system resulted in a BF-BT-0.08BLTN ceramic with a large Wrec of 3.26 J/cm3 and a high eta of 80.8%. The addition of BLTN enhanced the relaxor behavior and band gap of BF-BT ceramics and suppressed grain growth. Furthermore, the x = 0.08 ceramic exhibited excellent thermal stability, surpassing other BiFeO3-based ceramics, due to the temperature-insensitive permittivity of BLTN. This work highlights the effectiveness of BLTN as an additive for dielectric materials in variable temperature environments.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Dibyaranjan Das, Roopam Gaur, Satyendra Singh
Summary: Dielectric ceramic capacitors have been extensively studied for their high-power density, fast charge-discharge rates, fatigue endurance, and temperature stability. This study investigates the dielectric and energy-storage performance of a new relaxor ferroelectric ceramic and finds that it exhibits high recoverable energy density and efficiency, as well as excellent temperature stability.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Xian-Xiong Huang, Tian-Fu Zhang, Wei Wang, Peng-Zu Ge, Xin-Gui Tang
Summary: This study prepared PHO AFE films for the first time and found that films annealed at 650 degrees C exhibited optimal energy-storage performance and thermal stability, making them a potential candidate for applications in power electronics systems.
MATERIALS & DESIGN
(2021)
Article
Energy & Fuels
Mustafa Asker, Dincer Akal, Mehmet Akif Ezan
Summary: In this study, the performance of a charging mode in a thermal energy storage system was investigated numerically, taking into account the first and second laws. The study focused on a storage unit with vertical parallel plates, where heat transfer fluid flowed between the plates. A simulation of the melting process was conducted using an in-house C++ model, considering natural convection. The model was validated with existing research, and a parametric analysis was carried out to assess the impact of heat transfer inlet temperature and aspect ratio on the system's performance indicators. The results showed significant effects of these factors on the stored energy, effectiveness, and exergy efficiency.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Energy & Fuels
Seunghee Park, Byeongnam Jo
Summary: This study aims to develop a surfactant-free sol-gel based synthesis protocol for microencapsulating a molten salt (potassium nitrate, KNO3) with titanium dioxide (TiO2) that is thermally stable and robust. The effects of synthesis parameters on thermal performance and thermal reliability of the molten salt microcapsules were investigated. The resulting microcapsules exhibited exceptional thermal performance and reliability at elevated temperatures up to 400°C.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Mario Petrollese, Mario Cascetta, Vittorio Tola, Daniele Cocco, Giorgio Cau
Summary: A novel Pumped Thermal Energy Storage (PTES) system integrated with a Concentrating Solar Power (CSP) plant is proposed and investigated. The system operates with the same working fluid as the CSP plant and includes a Thermal Energy Storage (TES) system composed of three packed-bed tanks. Mathematical models were developed to simulate the system's performance and evaluate the thermal profiles of the TES tanks. A feasible design with an exergetic roundtrip efficiency of about 60% was proposed based on the results.
Article
Chemistry, Physical
Xiaokuo Er, Peng Chen, Jiesen Guo, Yuxuan Hou, Xiaobo Yu, Pingping Liu, Yang Bai, Qian Zhan
Summary: In this work, a flexible capacitor with high energy density, large electric breakdown strength, excellent frequency and thermal stability, and high bending endurance was prepared. The study also discovered multi-domain antiferroelectric phases with incommensurate modulation structures in the capacitor.
JOURNAL OF MATERIOMICS
(2022)
Article
Chemistry, Physical
Minh D. Nguyen
Summary: Lead-free BaZr0.35Ti0.65O3 (BZT) thin films were grown on silicon using pulsed laser deposition. The phase structures were controlled by deposition temperature, which significantly influenced breakdown strength and energy-storage performance. The low-temperature deposited BZT films exhibited a paraelectric phase and achieved the highest recoverable energy density of 121.2 J/cm3 with a medium energy efficiency of 88.2%. The improved energy storage was attributed to enhanced breakdown strength and a slimmer and slanted polarization hysteresis loop. Additionally, the BZT films showed excellent thermal stability, fatigue endurance, and suitability for harsh environments.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Mario Cascetta, Fabio Licheri, Rosa P. Merchan, Mario Petrollese
Summary: This study analyzes the expected performance of an innovative PTES system integrated with a CSP plant. The results demonstrate the technical feasibility of the integration and the ability of the system to participate in energy arbitrage.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Abid Ustaoglu, Ali Yaras, Gokhan Hekimoglu, Ertugrul Erdogmus, Ahmet Sari, Osman Gencel
Summary: This study aims to develop a new shape-stable gypsum composite using expanded glass sphere (EGS) and lauryl alcohol (LA) and analyzes its thermal performances. The EGS/LA composite has lower operating temperature and higher melting enthalpy, providing a more comfortable indoor temperature and reducing energy demand. The EGS/Gypsum composite with LA (50%) as a wall cover material can reduce carbon emissions and provide a more comfortable indoor temperature.
Article
Construction & Building Technology
Valeria Cascione, Daniel Maskell, Andy Shea, Pete Walker
Summary: Wall constructions can passively regulate indoor Relative Humidity through moisture buffering. The hygroscopic materials' response to humidity and temperature variations impacts water vapor adsorption and desorption, with temperature affecting the rate and time lag of response. Developing laboratory tests that accurately represent materials' behavior in buildings, exposed to sine wave-forms, is crucial.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Ahmad Wadee, Pallavi Achanta, Pete Walker, Nick McCullen, Veronica Ferrandiz-Mas
Summary: This study developed a novel gypsum plaster with high energy storage phase change material (PCM) loaded granules to reduce energy consumption in buildings.PCM gypsum plaster achieved the maximum thermal comfort, while incorporating PCM granules into cement blocks resulted in the highest energy savings.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
K. Chopra, V. V. Tyagi, Sudhir Kumar Pathak, Apaar Khajuria, A. K. Pandey, Nazaruddin Abd Rahman, Muhamad Mansor, Ahmet Sari
Summary: The major problems associated with conventional heat pipe vacuum collector systems are overheating of heat pipes, poor transfer of heat across the absorber and finned heat pipes, and inability to provide hot water in the late evening hours. This study designed and fabricated a stearic acid amalgamated vacuum tube solar collector system to overcome these problems. Experimental results showed that the thermal output of the solar system with storage material was enhanced compared to the conventional system. The proposed solar system is highly recommended over conventional water heating systems in urban and rural areas.
Article
Multidisciplinary Sciences
Nour Bassim Frahat, Abid Ustaoglu, Osman Gencel, Ahmet Sari, Gokhan Hekimoglu, Ali Yaras, Juan Jose del Coz Diaz
Summary: This study aims to investigate the impact of using wood fiber/eutectic mixture of stearic and capric acid on the fuel, cost, and carbon emission-saving potentials for various phase change materials (PCM) cases. The results show that INS-PCM5 can provide 1.74 times, 1.5 times, and 1.33 times larger cost savings than INS in the 2nd, 3rd, and 4th regions for all fuels.
SCIENTIFIC REPORTS
(2023)
Article
Green & Sustainable Science & Technology
Sudhir Kumar Pathak, V. V. Tyagi, K. Chopra, A. K. Pandey, Ahmet Sari, Ammar M. Abdulateef
Summary: This study proposes a novel method of incorporating a phase-change material (PCM) in a solar water heater, which can store excess heat and provide hot water even in low-sunshine conditions. The system achieves energetic and exergetic efficiencies of 76.57% and 79.64% for clear weather, and 2.37% and 1.38% for cloudy weather, respectively.
Article
Energy & Fuels
Azime Subasi, Serkan Subasi, Muhammed Bayram, Ahmet Sari, Gokhan Hekimoglu, Abid Ustaoglu, Osman Gencel, Togay Ozbakkaloglu
Summary: The use of phase change materials in the synthesis of polyester allows for the production of polymer composites with excellent thermal and mechanical properties, promoting thermal energy savings.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Imran Khan Rind, Ahmet Sari, Mustafa Tuzen, Muhammad Farooque Lanjwani, Isa Karaman, Tawfik A. Saleh
Summary: In this study, graphene nanoplatelets (GNP) were coupled with Staphylococcus aureus (S. aureus) for the adsorption of antimony (Sb) from water. The optimum conditions for composite dosage, initial concentration, pH level, contact time, and temperature were determined. The GNP/S. aureus composite exhibited promising adsorption capacity for Sb(III) ions in wastewater.
SURFACES AND INTERFACES
(2023)
Article
Construction & Building Technology
Sudhir Kumar Pathak, V. V. Tyagi, K. Chopra, A. K. Pandey, Ahmet Sari
Summary: In recent years, the increasing building energy consumption has led to a global energy shortage crisis due to population growth and the desire for a better lifestyle. Therefore, the use of solar water heating systems in buildings is crucial for sustainability. This study developed a novel solar collector using phase change material and compared its performance with a reference unit without energy storage material. The findings showed that the developed collector had higher thermal and exergy outputs, lower cost of hot water production, and reduced CO2 emissions compared to the reference unit.
Article
Agricultural Engineering
Imran Khan Rind, Ahmet Sari, Mustafa Tuzen, Muhammad Farooque Lanjwani, Tawfik A. Saleh
Summary: A bentonite clay-based silicon dioxide magnetic composite was synthesized and used as an effective adsorbent for the removal of BPA from aqueous solutions. The study demonstrated that the composite had good adsorption performance and cycling stability, making it a potential alternative sorbent for BPA adsorption in water.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Green & Sustainable Science & Technology
Fatih Kocyigit, Muhammed Bayram, Gokhan Hekimoglu, Vedat Veli Cay, Osman Gencel, Abid Ustaoglu, Ahmet Sari, Ertugrul Erdogmus, Togay Ozbakkaloglu
Summary: This study aims to develop a novel and environmentally friendly foam concrete incorporating capric acid saturated waste basalt powder. The results show that this foam concrete has high latent heat of phase change and can effectively store and regulate thermal energy. This material can be considered as an environmentally friendly building material for thermoregulation and energy conservation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Multidisciplinary
Mohit Pandya, A. K. Ansu, R. K. Sharma, D. Tripathi, V. V. Tyagi, Ahmet Sari
Summary: Polyethylene glycol (PEG) is a promising material in the organic phase change material (PCM) family due to its high latent heat energy storage ability. However, its poor heat conductivity limits its potential in real-time applications. In this study, a hybrid nanomaterials based PCM was developed by incorporating PEG2000 with nano aluminium oxide (Al2O3) and copper oxide (CuO) composites to increase its thermal conductivity. Six samples were prepared, with the total mass of the nanoparticles ensured to be 3% of the total mass of the sample. The thermal and chemical stability of the materials were tested using FTIR, TGA, DSC, and XRD techniques. The results showed that the developed composite has higher thermal conductivity, chemical and thermal stability, and significantly high latent heat. These composites have the potential to be used as thermal energy storage materials in electronic board and solar-based applications.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2023)
Article
Energy & Fuels
P. Singh, R. K. Sharma, Gokhan Hekimoglu, Ahmet Sari, Osman Gencel, V. V. Tyagi
Summary: Fatty acids are a preferred choice for latent heat thermal energy storage (LHTES), but their limited applications due to low thermal conductivity and container requirements have been addressed by using methyl palmitate (MP) doped with carbon nanofibers (CNFs) and expanded waste glass (EWG) to form composite phase change materials (CPCMs). Doping CNFs into CPCMs enhanced their conductivity and shortened the charging/discharging periods without affecting their LHTES properties significantly.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Osman Gencel, Muhammed Bayram, Serkan Subasi, Gokhan Hekimoglu, Ahmet Sari, Abid Ustaoglu, Muhammed Marasli, Togay Ozbakkaloglu
Summary: In recent years, the research on thermal energy storage capacity of building materials has been accelerated due to increased energy consumption for specific applications in residential and commercial buildings, such as heating, cooling, air conditioning and lighting. Moreover, the development of light-transmitting building elements is a novel energy-saving technique that enhances lighting efficiency in buildings. Therefore, this study aims to design an untried microencapsulated phase change material (MPCM) integrated glass fiber reinforced gypsum composite with sufficient light-transmitting properties and thermal energy storage capacity.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Sudhir Kumar Pathak, V. V. Tyagi, K. Chopra, Ahmet Sari
Summary: Solar water heaters are a promising technology for hot water generation in cold climates. This research focuses on the design and development of two types of compact vacuum tube solar collectors (VTSCs) with and without a phase change material (PCM). The results show that the VTSC with PCM has a higher daily energy output and thermal efficiency compared to the conventional system without PCM. The analysis demonstrates that using PCM in VTSC can improve energy efficiency and provide hot water constantly during night time or off sunshine hours.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Thermodynamics
Osman Gencel, Abid Ustaoglu, Ahmet Sari, Gokhan Hekimoglu, Mucahit Sutcu, Ayhan Tozluoglu, Ahmet Tutus, Mustafa Cicekler, Vineet Veer Tyagi
Summary: This study introduces a novel wall-covering element made of wallpapers impregnated with Phase Change Material (PCM) to enhance thermal properties and provide effective thermal regulation in interior spaces. The results show that the impregnated wallpapers significantly reduce interior room temperature fluctuations and maintain indoor temperature longer within a comfortable range.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Energy & Fuels
Gokhan Hekimoglu, Ahmet Sari, Osman Gencel, Yunus Onal, Abid Ustaoglu, Ertugrul Erdogmus, Maria Harja, V. V. Tyagi
Summary: This study presents a leak-proof composite with enhanced properties by impregnating bio-based phase change materials into a cement-pumice based mortar matrix. The experimental results show that the composite exhibits lower mechanical strength but excellent thermal regulation and energy storage performance. Therefore, this composite material has potential applications in energy-efficient construction materials to improve the thermal performance of buildings.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Yusuf Er, Onur Guler, Gokhan Hekimoglu, Mehrab Nodehi, Abid Ustaoglu, Ahmet Sari, Osman Gencel, Togay Ozbakkaloglu
Summary: This study utilized a Vat Photopolymerization technique to 3D print a composite resin filament containing lauric acid (LA) as a phase change material (PCM). Through various tests, it was found that the composite with 50% LA additive exhibited the highest latent heat enthalpy value and a homogeneous internal structure. Although this material caused a decrease in mechanical properties, the study demonstrated the feasibility of real-time 3D printing of PCMs with resins, solving the leakage issue and providing important implications for energy storage and insulation.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Construction & Building Technology
Samiran Khorat, Debashish Das, Rupali Khatun, Sk Mohammad Aziz, Prashant Anand, Ansar Khan, Mattheos Santamouris, Dev Niyogi
Summary: Cool roofs can effectively mitigate heatwave-induced excess heat and enhance thermal comfort in urban areas. Implementing cool roofs can significantly improve urban meteorology and thermal comfort, reducing energy flux and heat stress.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Qi Li, Jiayu Chen, Xiaowei Luo
Summary: This study focuses on the vertical wind conditions as a main external factor that limits the energy assessment of high-rise buildings in urban areas. Traditional tools for energy assessment of buildings use a universal vertical wind profile estimation, without taking into account the unique wind speed in each direction induced by the various shapes and configurations of buildings in cities. To address this limitation, the study developed an omnidirectional urban vertical wind speed estimation method using direction-dependent building morphologies and machine learning algorithms.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Xiaojun Luo, Lamine Mahdjoubi
Summary: This paper presents an integrated blockchain and machine learning-based energy management framework for multiple forms of energy allocation and transmission among multiple domestic buildings. Machine learning is used to predict energy generation and consumption patterns, and the proposed framework establishes optimal and automated energy allocation through peer-to-peer energy transactions. The approach contributes to the reduction of greenhouse gas emissions and enhances environmental sustainability.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ying Yu, Yuanwei Xiao, Jinshuai Chou, Xingyu Wang, Liu Yang
Summary: This study proposes a dual-layer optimization design method to maximize the energy sharing potential, enhance collaborative benefits, and reduce the storage capacity of building clusters. Case studies show that the proposed design significantly improves the performance of building clusters, reduces energy storage capacity, and shortens the payback period.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Felix Langner, Weimin Wang, Moritz Frahm, Veit Hagenmeyer
Summary: This paper compares two main approaches to consider uncertainties in model predictive control (MPC) for buildings: robust and stochastic MPC. The results show that compared to a deterministic MPC, the robust MPC increases the electricity cost while providing complete temperature constraint satisfaction, while the stochastic MPC slightly increases the electricity cost but fulfills the thermal comfort requirements.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Somil Yadav, Caroline Hachem-Vermette
Summary: This study proposes a mathematical model to evaluate the performance of a Double Skin Facade (DSF) system and its impact on indoor conditions. The model considers various design parameters and analyzes their effects on the system's electrical output and room temperature.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ruijun Chen, Holly Samuelson, Yukai Zou, Xianghan Zheng, Yifan Cao
Summary: This research introduces an innovative resilient design framework that optimizes building performance by considering a holistic life cycle perspective and accounting for climate projection uncertainties. The study finds that future climate scenarios significantly impact building life cycle performance, with wall U-value, windows U-value, and wall density being major factors. By using ensemble learning and optimization algorithms, predictions for carbon emissions, cost, and indoor discomfort hours can be made, and the best resilient design scheme can be selected. Applying this framework leads to significant improvements in building life cycle performance.
ENERGY AND BUILDINGS
(2024)
