Review
Green & Sustainable Science & Technology
Anish Malan, K. Ravi Kumar
Summary: This study provides a critical summary of various raytracing techniques to investigate the optical and thermal performance of the parabolic trough solar collector (PTSC). It examines the journey of flux distribution studies, different methods like analytical approach, measurements techniques, and modeling software, with a focus on the impact of various parameters on the flux distribution. The study also suggests numerical studies for future research in this domain.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
X. Y. Tang, W. W. Yang, Y. Yang, Y. H. Jiao, T. Zhang
Summary: The newly designed SR improves the uniformity of heat flux distribution on the absorber tube surface to over 90%, much higher than other existing designs. Additionally, the optical efficiency of the PTC with this design is also increased compared to other designs.
Article
Thermodynamics
Yunting Xu, Ran Tian, Xiaoye Dai, Lin Shi
Summary: This study numerically simulated the heat transfer under non-uniform heat flux in a parabolic-trough collector, with a focus on the coupling effect of heat flux distribution, property variations, and buoyancy effect. The results showed that non-uniform heat flux reduced the overall heat transfer rate, and the buoyancy effect improved the heat transfer rate. The analysis also revealed that the circumferential non-uniformity was underestimated even with the maximum heat flux.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Multidisciplinary Sciences
Youssef Drira, Nadim Fakhfakh, Skander Jribi, Hatem Bentaher, Ilyes Benhassine, Lotfi Ammar
Summary: Parabolic trough collectors (PTCs) are advanced and widely used in solar concentrating systems, but their high cost and technology requirements hinder their implementation in low-income countries. This study assessed the performance of two small-scale solar thermal production units (SPLFR and PTC-SS) as alternatives to PTCs.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Thermodynamics
Wei Peng, Esam Hussein, Omid Karimi Sadaghiani
Summary: The quality of heat flux distribution around the receiver tube of LS-3 PTC is investigated by defining six statistical and geometrical indices. Different HF distributions are simulated using validated numerical methods, with results showing that the index of Int represents the number of sun rays hitting the receiver tube. The inverse of U-st and B-st parameters are introduced as indices of uniform heat flux distribution, with U-st having a larger impact on T-0 and eta(th) compared to B-st.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Review
Thermodynamics
Tawfiq Chekifi, Moustafa Boukraa
Summary: This article presents a comprehensive review of the performance improvement research on parabolic trough collectors, with a focus on works using numerical methods. It outlines the possible further developments of these devices and identifies areas that need more attention and investigation.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Energy & Fuels
Anish Malan, K. Ravi Kumar
Summary: The study presents the coupled flux distribution and thermal analysis of large aperture PTSC incorporating limb darkening effect. Various parameters affecting flux distribution are analyzed, and the need for improved manufacturing standards to enhance the performance of large aperture PTSC is highlighted.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Menghao Hao, Lizhi Chen, Jianxun Chen, Luyi Lu, Jianlan Li
Summary: This study proposes an installation mode for the absorber in a parabolic trough collector to increase the uniformity of solar flux distribution and reduce stress. The simulation results show that with an initial offset, the temperature difference and stress of the absorber are significantly decreased, while the optical-thermal efficiency is slightly increased.
Article
Thermodynamics
Wei Peng, Omid Karimi Sadaghiani
Summary: The distribution of heat flux around the receiver tube of parabolic trough collectors has a crucial effect on outlet temperature and thermal efficiency. This research investigates changes in both the internal and external geometry of the receiving tube for the first time, which aims to increase contact surface with the internal working fluid.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Thermodynamics
Kun Wang, Zhen-Dong Zhang, Xi-Ying Zhang, Chun-Hua Min
Summary: This study numerically investigated the buoyancy effects on the convective heat transfer and thermal stress of S-CO2 in parabolic trough receivers under non-uniform solar flux distribution. Results showed that buoyancy effects significantly enhance the bulk average heat transfer, but have complex impacts on local heat transfer characteristics.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Green & Sustainable Science & Technology
Mojtaba Rezapour, Mohammad Gholizadeh
Summary: This study conducted a numerical analysis on a solar thermochemical reactor with Parabolic Trough Concentrator for Methanol Steam Reforming, considering the effects of Cu nanoparticles. By optimizing reactor performance through changing parameters like solar heat flux and nanoparticle percentage, the efficiency was shown to reach 46.3% in the optimal state. The analysis indicated that reactor efficiency is influenced by solar heat flux and nanoparticle volume fraction.
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
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
Engineering, Multidisciplinary
PeiJing Li, TaiXiu Liu, YuanLong Qin, JiChao Li, QiBin Liu
Summary: This study proposes a new type of parabolic trough collector (PTC) with dual planar mirrors (DPMS) to homogenize the circumferential solar flux distribution. A design method and optimization approach are proposed, and an uncertainty analysis is conducted. The results show that the new PTC maintains low circumferential temperature difference and thermal deformation under different working conditions, making it suitable for solar energy applications in various fields and having the potential for large-scale applications.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Multidisciplinary Sciences
Mohamed Mahran Kasem
Summary: This study presents a novel multi-objective optimization model for the design optimization of PTCs, with thermal and exergetic efficiencies being the primary performance indicators. The optimization model effectively maximizes both thermal and exergetic efficiencies, with water and helium achieving the highest optimal values, respectively.
SCIENTIFIC REPORTS
(2022)
Article
Thermodynamics
Weijia Wang, Yanqiang Kong, Fengli Wang, Lijun Yang, Yuguang Niu
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Yue Yang, Lei Chen, Lijun Yang, Xiaoze Du, Yongping Yang
Article
Thermodynamics
Xianwei Huang, Weijia Wang, Lin Chen, Lijun Yang, Xiaoze Du
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Review
Green & Sustainable Science & Technology
Kai Tong, Lijun Yang, Xiaoze Du, Yongping Yang
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2020)
Article
Thermodynamics
Weijia Wang, Fengli Wang, Yanqiang Kong, Lijun Yang, Yuguang Niu, Xiaoze Du, Ansheng Li
Summary: This research investigates the impact of different water entry patterns on water flow and outlet temperature distribution in air-cooled heat exchangers. The results suggest that water entry patterns can affect outlet temperature distribution, but have minimal impact on anti-freezing performance.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Lei Chen, Weijia Wang, Yanqiang Kong, Lijun Yang, Xiaoze Du
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Wenhui Huang, Xianwei Huang, Lijun Yang, Xiaoze Du
Summary: This study examines the effects of three types of lateral double-layered deflectors on the cooling performance of ACC systems through CFD simulation methods. It was found that inclined-vertical deflectors outperform others in all cases, especially in high wind speeds, and can reduce turbine back pressure by 12.15% at 12 m/s wind speed, making them suitable for practical engineering applications under windy conditions.
JOURNAL OF THERMAL SCIENCE
(2021)
Article
Engineering, Chemical
Yuan Xue, Xiaoze Du, Lijun Yang
Summary: A new scheme combining thermo-vapor compression and utilization of low-grade heat is proposed to reduce the energy consumption of low-temperature multi-effect distillation, resulting in improved water production and lower water production costs under optimal conditions. The study concludes that the new system outperforms others in terms of water production and production costs.
Article
Construction & Building Technology
Juntao Wang, Zhaoxuan Wu, Genben Yang, Yisen Niu, Liqiang Duan, Jifeng Song
Summary: Experimental results showed that PMMA optical fibers can safely transmit high solar flux under the combined protection of homogenizer, infrared light filter, and liquid water.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Yue Yang, Lei Chen, Lijun Yang, Xiaoze Du
Summary: The study shows that the battery pack with combined forced convection and PCM cooling has better thermal performance, with both the maximum temperature and maximum temperature difference controlled within the ideal range. Additionally, at an ambient temperature of 26.5°C, the phase change temperature of 35°C is most advantageous for the thermal management system.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Green & Sustainable Science & Technology
Jifeng Song, Zhaoxuan Wu, Juntao Wang, Kexin Zhang, Kai Wang, Kunhao Liu, Liqiang Duan, Hongjuan Hou
Summary: The study developed a comprehensive cooling approach to solve the overheating problem of PMMA plastic optical fibers, allowing for their safe use in transmitting focused sunlight. The system achieved a transmission efficiency of about 15%, demonstrating the feasibility of using low-cost plastic optical fibers for daylighting instead of expensive silica fiber.
Article
Energy & Fuels
Jifeng Song, Haiyu Wang, Kunhao Liu, Lianglin Zou, Kai Wang, Ying Su, Qian Wang, Zubing Zou
Summary: In this study, the convolution operation model is used to traverse and combine the flux patterns under multiple types of optical errors. By comparing the actual measured flux distribution profiles with the ideal values, the Gaussian slope error, gravity deformation error, and alignment error of the concentrator are identified.
Article
Thermodynamics
Jifeng Song, Genben Yang, Haiyu Wang, Yisen Niu, Hongjuan Hou, Ying Su, Qian Wang, Zubing Zou
Summary: Calculating and evaluating the spillover of flux reflected by heliostats on the heat shields is crucial for the construction, operation, and optimization of solar thermal power tower plants. The authors established a concentrated flux distribution model based on the real sunshape and considered various factors to calculate the flux density distribution on the receiver and heat shields under different conditions. The results indicate that the radiation energy on heat shields accounts for 1%-8% of the total received energy of the system under typical conditions.
Article
Thermodynamics
Wenhui Huang, Lei Chen, Lijun Yang, Xiaoze Du
Summary: The study highlights the impact of environmental conditions on the efficiency of direct dry cooling systems, with adjustments to the rotational speed of axial flow fans leading to reductions in standard coal consumption.
Article
Engineering, Environmental
Kai Tong, Lijun Yang, Xiaoze Du
CHEMICAL ENGINEERING JOURNAL
(2020)
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.
