Article
Thermodynamics
Kishor Deshmukh, Suhas Karmare, Pradeep Patil
Summary: The convective heat transfer performance of U-pipe evacuated tube solar thermal collector with TiN nanofluid was investigated in this study. TiN nanoparticles with sizes of 40-50 nm were dispersed in distilled water at different volume concentrations. The stability and thermophysical properties of TiN nanofluid were experimentally measured. The experimental investigation included the convective heat transfer coefficient, friction factor characteristic, and solar thermal efficiency at different volume concentrations and mass flow rates. The performance of the solar thermal collector was tested under outdoor conditions. A correlation was proposed to determine the Nusselt number, friction factor, and solar thermal efficiency in laminar flow. The TiN nanofluid was recommended for industrial solar thermal applications due to its notable improvement in convective heat transfer performance despite the friction factor penalty.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Hong-Jin Joo, Hee-Youl Kwak, Minsuk Kong
Summary: The present study experimentally investigates the effect of twisted tape inserts on the thermal performance of an eccentric inlet and outlet heat pipe evacuated-tube solar thermal collector (HP-ESTC). The results show that the addition of twisted tape inserts enhances heat transfer performance by eliminating stagnation flow, reducing flow skewness, and generating rotating flow. A comprehensive performance analysis considering both heat transfer and pressure drop characteristics confirms that using twisted tape inserts can improve overall performance by approximately 7.7%. To assess its applicability for commercial HP-ESTCs, an HP-ESTC containing twisted tape inserts was manufactured and tested outdoors.
Article
Green & Sustainable Science & Technology
Mohammed J. Alshukri, Adel A. Eidan, Saleh Ismail Najim
Summary: This study presents a new method of integrating phase change materials in solar water heaters to improve performance by delaying heat release. The results demonstrate that integrating PCM in both the evacuated tube and separated tanks significantly improves efficiency and extends the supply of hot water.
Article
Green & Sustainable Science & Technology
Sumit Kumar, Arun Kumar Tiwari
Summary: This study demonstrated the impact of hexagonal Boron Nitride nanofluid on the thermal performance of a solar collector. The results showed that the nanofluid with a volumetric concentration of 1.5% achieved the highest energy efficiency at a mass flow rate of 0.051 kg/s, which was approximately 84% higher than water.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Green & Sustainable Science & Technology
Salwa Bouadila, Tauseef-ur Rehman, Maughal Ahmed Ali Baig, Safa Skouri, Sara Baddadi
Summary: Evacuated tube solar collectors are technically viable and economically attractive for solar water heating. However, they suffer from heat and water losses along the manifold. To address this issue, Phase Change Materials (PCMs) have been integrated into the collectors. This paper presents three modified collectors and compares their performance through energy and exergy analysis, as well as economic evaluation.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Green & Sustainable Science & Technology
Weiwei Zhang, Linzuo Duan, Jiabin Wang, Xuyang Ba, Zijing Zhang, Rui Tian
Summary: This study investigates the effect of tracking and installation errors on the optical performance of a parabolic trough collector with heat pipe evacuated tube. The results show that within certain ranges of errors, the optical efficiency remains unchanged, providing theoretical support for selecting tracking systems with reasonable accuracy and determining allowable installation errors.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Green & Sustainable Science & Technology
M. Sheikholeslami, Zafar Said, M. Jafaryar
Summary: This article presents a numerical simulation for the thermal analysis of a parabolic trough collector (PTC) with a wavy absorber tube using the finite volume method. The study investigates the performance of a new wavy absorber tube in a solar system with a parabolic reflector. The results show that increasing the Reynolds number (Re) and the volume concentration can improve the heat transfer efficiency.
Article
Green & Sustainable Science & Technology
Li Feng, Jiajun Liu, Haitao Lu, Yuning Chen, Shenyu Wu
Summary: This study numerically simulated the performance of a solar evacuated tube collector using phase change materials. The results showed that lowering the melting point of the PCM and increasing the mass flow rate of the working fluid and the mass fraction of nanoparticles can improve the system's performance.
Article
Thermodynamics
Ipek Aytac, Azim Dogus Tuncer, Ataollah Khanlari, Halil Ibrahim Variyenli, Sedat Mantici, Levent Gungor, Sinan Unvar
Summary: The effects of utilizing Mg0-CuO water nanofluid on the performance of a heat pipe evacuated solar water heater have been experimentally analyzed. The results show that using the nanofluid can significantly improve the thermal efficiency and sustainability index of the system, as well as reduce the payback period.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Environmental Sciences
Sakthi Priya Manivannan, Divya Laxmi Gunasekaran, Gowthami Jaganathan, Shanthi Natesan, Sabari Muthu Muthusamy, Sung Chul Kim, Balaji Kumar, Ganesh Kumar Poongavanam, Sakthivadivel Duraisamy
Summary: This paper investigates the internet of things application of the solar evacuated tube heat pipe system coupled with a thermoelectric generator. The study explores the influence of a parabolic trough concentrating collector on the system efficiency. A power electronic boost converter is used to enhance the output power of the thermoelectric generator for mobile charging and lighting applications. The paper also examines the carbon credit of the system.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Thermodynamics
H. B. Marulasiddeshi, Praveen Kumar Kanti, S. B. Prakash, S. N. Sridhara
Summary: This research investigates the thermohydraulic behavior and thermodynamic irreversibility rate of water-based Al2O3 and Al2O3 + CuO hybrid nanofluid in a circular copper tube under a constant heat flux. The study analyzes the thermophysical characteristics, Nusselt number, entropy generation number, and friction factor of the nanofluids at different concentrations and Reynolds numbers. The findings demonstrate the potential of Al2O3 + CuO hybrid nanofluids as alternative cooling fluids for thermal systems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Hariprasad Tarigonda, Dadamiah P. M. D. Shaik, D. Raghu Rami Reddy, G. Vidya Sagar Reddy
Summary: Thermal management is a significant challenge in various technologies today due to the increasing demand for faster processing rates and the continual shrinking of device dimensions. Heat pipes are passive devices with low cost, simple form, low thermal resistance, high effective thermal conductivity, and high efficiency, making them suitable for improving thermal performance. The addition of nano-sized particles in working fluids can greatly enhance the heat transfer performance. This research evaluates the heat transfer performance of a heat pipe using different working fluids, namely de-ionized water, aluminum oxide nanofluid, and hybrid nanofluid. The results show that hybrid nanofluid achieves higher thermal conductivity, stability, and enhanced heat transfer rates compared to aluminum oxide nanofluid.
INTERNATIONAL JOURNAL OF THERMOPHYSICS
(2022)
Article
Thermodynamics
Azim Dogus Tuncer, Ipek Aytac, Halil Ibrahim Variyenli, Ataollah Khanlari, Sedat Mantici, Alim Kararti
Summary: This study aims to improve the thermal performance of heat pipe evacuated tube solar collectors (HP-ETSCs) by replacing the working fluid with magnetic nanofluid. The results showed that utilizing NiFe2O4/water magnetic nanofluid as the working fluid in the HP-ETSC significantly increased the thermal performance and exergy efficiency of the system.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Green & Sustainable Science & Technology
Tyler J. E. O'Neil, Sarvenaz Sobhansarbandi
Summary: This study experimentally compared the thermal performance of a custom made U-Pipe evacuated tube solar collector (ETC) with a commercially available heat pipe ETC (HPETC). Results showed that the U-Pipe ETC achieved higher peak water temperatures and higher efficiency compared to the HPETC. The U-Pipe ETC also demonstrated higher peak temperatures and longer duration of latent heat storage when thermal storage media was used.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Mohammed J. Alshukri, Adel A. Eidan, Saleh Ismail Najim
Summary: The research investigates the enhancement of a heat pipe evacuated tube collector with nano or micro-enhanced phase change materials, which improves the efficiency of solar water heaters and reduces temperature fluctuations in hot water. The integration of enhanced-paraffin wax with NP-CuO and MP-ZnO showed significant efficiency improvements in both the evacuated tubes and separate storage tanks.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Mohammed J. Alshukri, Adel A. Eidan, Saleh Ismail Najim
Summary: The research investigates the enhancement of a heat pipe evacuated tube collector with nano or micro-enhanced phase change materials, which improves the efficiency of solar water heaters and reduces temperature fluctuations in hot water. The integration of enhanced-paraffin wax with NP-CuO and MP-ZnO showed significant efficiency improvements in both the evacuated tubes and separate storage tanks.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Assaad Al Sahlani, Kelvin Randhir, Nesrin Ozalp, James Klausner
Summary: This paper presents a low-order physical model to simulate the dynamic response of temperature inside a tubular plug-flow reactor prototype. Through validation and simulation experiments, the results show that the system response can be efficiently controlled using control parameters, and the designed feedback control model can successfully track different reference reactor temperatures and eliminate overshoot within a reasonable settling time. This study provides a reference for the development of hybrid reactors.
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Thermodynamics
Assaad Al Sahlani, Kelvin Randhir, Nesrin Ozalp, James Klausner
Summary: The study presents a heat transfer model of a tubular plug-flow reactor for solar fuel production, validated using experimental data and applied for simulations under various gas flow rates and temperatures. The simulation results showed good agreement with experimental results with a maximum steady state error of less than 6%, demonstrating the accuracy and reliability of the model for controlling temperature inside plug-flow reactors in thermochemical energy storage applications.
JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS
(2022)
Review
Engineering, Mechanical
Noora S. Mahdi, Adel A. Eidan, Hashim H. Abada, Mohamed Al-Fahham
Summary: This review paper investigates the addition of nanofluid particles to evacuated tube solar collector-PCM, explores the applications of different types of ETSCs, factors influencing collector performance, and properties affecting the selection of PCM and nanofluid. The paper also proposes future ideas for using nanofluid materials as a working fluid to enhance the performance and efficiency of ETSCs.
AUSTRALIAN JOURNAL OF MECHANICAL ENGINEERING
(2023)
Review
Energy & Fuels
Mohammed J. Alshukri, Ahmed Kadhim Hussein, Adel A. Eidan, Ammar Alsabery
Summary: This research paper provides a comprehensive review of recent advances in heat pipe-evacuated tube solar collectors, covering enhancement techniques, structure design, modification methods, effects of integration of CPCs, types of working fluids, and the use of storage systems. It offers useful conclusions and recommendations to guide readers in producing future papers on heat pipe-solar collector systems.
Review
Thermodynamics
Sarah A. Abbas, Adel A. Eidan, Assaad Al Sahlani
Summary: This research paper reviews recent advances in solar chemical reactions, focusing on various types of solar reactors and their performance parameters. Different models of solar reactors play a crucial role in chemical thermal energy storage and concentrated solar power generation.
INTERNATIONAL JOURNAL OF HEAT AND TECHNOLOGY
(2022)
Article
Thermodynamics
Norhan Dawood, Jalal M. Jalil, Majida K. Ahmed
Summary: This paper investigates the thermal performance of a window solar air collector with seven-moveable circular perforated absorbent plates. A mathematical model and the finite volume scheme algorithm are employed to analyze the temperature variation and thermal efficiency of the collector under different angles, solar irradiance intensities, and air mass flow rates. The results demonstrate significant temperature difference and high thermal efficiency can be achieved under specific conditions.
Article
Energy & Fuels
Jalal M. Jalil, Hussein S. Mahdi, Asim S. Allawy
Summary: The effects of using phase change material (PCM) on heat sink cooling performance were investigated in this study. The experiments showed that the use of PCM significantly reduced the temperatures of the heat sink. Additionally, the study found that adding nanoparticles to the PCM improved heat sink performance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Ammar I. I. Alsabery, Mohammed J. J. Alshukri, Nasr A. A. Jabbar, Adel A. A. Eidan, Ishak Hashim
Summary: The generation of entropy and mixed convection in a nanofluid-filled 3D wavy tank containing a rotating cylinder is investigated. The effects of Richardson number, nanoparticle volume fraction, and number of oscillations on heat transfer enhancement are studied through numerical simulations using the FEM. The results show that increasing the nanoparticle volume fraction can enhance heat transfer for low values of the Richardson number and oscillation.
Article
Green & Sustainable Science & Technology
Naseer Abboodi Madlool, Mohammed J. Alshukri, Ammar I. Alsabery, Adel A. Eidan, Ishak Hashim
Summary: This paper investigates the convective heat transfer of laminar forced convection in a wavy channel. Numerical simulations using the finite element method are performed to obtain the 3D steady flow and heat transfer characteristics of Newtonian fluid. The study analyzes the effects of Reynolds number (10 < Re < 1000), number of oscillations (0 < N < 5), and wall amplitude (0.05 < A < 0.2) on the heat transfer. The results show that the average Nusselt number increases with the Reynolds number, and the number of oscillations and wall amplitude also affect the heat transfer.
INTERNATIONAL JOURNAL OF RENEWABLE ENERGY DEVELOPMENT-IJRED
(2023)
Article
Multidisciplinary Sciences
Hassanain Ghani Hameed, Hayder Azeez Neamah Diabil, Mohammed A. Al-fahham
Summary: The rapid growth in world population has increased the demand for potable water, especially in hot and dry regions. The main challenge in ensuring access to potable water is the cost and availability of water sources. This study explores the effectiveness of using concentrated solar power to evaporate water and produce pure water in a solar distillation system. Experimental tests using tap water and two nanofluids (aluminium oxide and zinc oxide) show that using aluminium oxide significantly increases the productivity of the solar unit. The model is simple, easy to install, and suitable for urban and desert areas.
Article
Energy & Fuels
Raisan F. Hamad, Mohammed J. Alshukri, Adel A. Eidan, Ammar I. Alsabery
Summary: The use of artificial roughness or ribs on the wall of the absorber plate can increase heat transfer in a solar air heater by interrupting the laminar sublayer. A trapezoidal rib was found to enhance the thermal performance of the solar air heater. Numerical analysis was conducted to study the flow and heat transfer characteristics using different types and arrangements of trapezoidal ribs.
Article
Thermodynamics
Adel A. Eidan, Sarah H. Ali, Assaad Al Sahlani, Mohammed J. Alshukri, Ali Mahmood Ahmed, Hussein A. Z. AL-bonsrulah, Vijayanandh Raja, Mohammed Al-Bahrani
Summary: This study investigates the effect of integrating phase change material (PCM) and applying vibration on the performance of a heat pipe evacuated tube solar collector (HP-ETSC). The results demonstrate that the system's performance is enhanced when PCM is integrated and vibration is applied.
INTERNATIONAL JOURNAL OF LOW-CARBON TECHNOLOGIES
(2022)
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.
