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
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.
Review
Green & Sustainable Science & Technology
Ashok Kumar Singh, Samsher
Summary: This paper reviews the performance of ETC assisted solar desalting units, especially emphasizing the advantages of thermosiphon ETC solar desalting units in addressing freshwater scarcity, and highlights their self-sustainability in remote areas.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Mechanical
Hafiz Muhammad Ali Hassan, Muhammad Amjad, Zia Ur Rehman Tahir, Adnan Qamar, Fahad Noor, Yanwei Hu, Talha Bin Yaqub, Enio P. Bandarra Filho
Summary: The study evaluated the performance of an integrated model of conventional solar still, flat plate collector, and parabolic trough collector using nanomaterials for producing potable water. The results showed that the integrated system with CNT nanofluid had the highest water production rate.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(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
Shri Ram, H. Ganesan, Vishnu Saini, Abhinav Kumar
Summary: In this investigation, a parabolic trough solar collector with an evacuated tube was fabricated and analyzed. The collector's efficiency increased with the use of CuO-H2O nanofluid as the working fluid, and the efficiency also increased with the volume flow rate of the working fluid. The heat transfer coefficients were higher for the CuO-H2O nanofluid compared to water, and the efficiency increase for different nanoparticle's concentrations was observed.
Article
Thermodynamics
Recep Ekiciler, Kamil Arslan, Oguz Turgut, Burak Kursun
Summary: This study investigates the three-dimensional heat transfer and flow characteristics of different hybrid nanofluids in a parabolic trough solar collector receiver under turbulent flow conditions. Results show that hybrid nanofluids outperform the base fluid in terms of heat transfer and flow features, with heat transfer enhancement correlated to Reynolds number and nanoparticle volume fraction. Among the tested nanofluids, Ag-MgO/Syltherm 800 with 4.0% nanoparticle volume fraction is identified as the most efficient working fluid for the PTC receiver.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Thermodynamics
Kun Hong, Yang Yang, Saman Rashidi, Yu Guan, Qingang Xiong
Summary: This study numerically investigated the thermal and flow characteristics of a parabolic-trough solar collector, showing that an increase in Cu nanoparticle concentration led to an increase in Nu and that the effect on heat transfer enhancement was more significant at lower Reynolds numbers. The study also assessed the impact of direct normal irradiance changes on the performance of the solar collector.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
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
Chemistry, Multidisciplinary
Tayeb Fahim, Samir Laouedj, Aissa Abderrahmane, Zied Driss, El Sayed Mohamed Tag-ElDin, Kamel Guedri, Obai Younis
Summary: This study presents a numerical analysis on improving heat transmission in the receiver of a parabolic trough solar collector by introducing perforated barriers. The use of obstacles increases pressure loss but enhances the collector's performance. Computational Fluid Dynamics (CFD) model analysis is conducted with the thermal oil D12 as the working fluid. The receiver tube with three holes (PO3) shows better heat transfer characteristics and can achieve significant enhancement of the system's performance.
FRONTIERS IN CHEMISTRY
(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
Thermodynamics
Rishikesh Kumar, M. A. Hassan
Summary: This study investigates the use of an improved energy transport fluid for enhancing the performance of solar parabolic trough collectors. The study found that suspending Fe2O3 nanoparticles in water-based nanofluids can significantly increase energy transport and performance evaluation. The nanofluids exhibit a decrease in specific heat, an increase in thermal conductivity, and a slight increase in viscosity. The surface heat transfer coefficient and performance evaluation criterion of the nanofluids increase with nanoparticle concentration and Reynolds number.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Green & Sustainable Science & Technology
Virendra Vishnu Bhagwat, Sujit Roy, Biplab Das, Nikhilkumar Shah, Avijit Chowdhury
Summary: This study investigated the performance of a heat pipe assisted parabolic trough collector with paraffin wax based phase change material for solar energy storage. The experiment was conducted in North-East India, comparing the system with and without circular fins in the heat pipe evaporator section. The presence of fins improved both charging and discharging efficiency of the latent heat storage system.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
G. Vijayan, P. P. Shantharaman, Ramalingam Senthil, R. Karunakaran
Summary: This study analyzes the performance of an unshielded receiver tube integrated solar parabolic trough collector using low-concentration Al2O3/deionized water nanofluid as the heat transfer fluid. The results show that the concentration and flow rate of the nanofluid have a positive impact on the collector efficiency.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
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
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.