Article
Thermodynamics
David Rodriguez-Sanchez, Gary Rosengarten
Summary: This study investigates the impact of secondary flat reflectors on the optical efficiency and misalignment sensitivity of parabolic trough collectors through ray-tracing simulations. The results show that a truncated version of the secondary flat reflector can enhance concentration while reducing optical efficiency, especially for high-temperature applications, by reducing radiation losses.
Article
Green & Sustainable Science & Technology
Sridhar Sripadmanabhan Indira, Chockalingam Aravind Vaithilingam, Ramsundar Sivasubramanian, Kok-Keong Chong, R. Saidur, Kulasekharan Narasingamurthi
Summary: This study introduces a hybrid compound parabolic concentrator and parabolic trough concentrator system for concentrator photovoltaic/thermal and hybrid concentrator photovoltaic/thermalthermoelectric generator applications. The research discusses the design and optical analysis of the system, evaluating the optical efficiency and performance under different tracking modes. The results show that the proposed hybrid system achieves a higher optical efficiency compared to standard systems, especially when utilizing dual-axis tracking.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Yongcai Li, Feng Jiao, Fei Chen, Zhenhua Zhang
Summary: The novel method presented in this paper for the performance optimization design of multi-sectioned compound parabolic concentrator (M-CPC) shows significant improvement in optical performance compared to the traditional standard S-CPC, with M-CPC4 being the optimal structure in this design. The improved average optical efficiency and acceptance angle ratio of M-CPC4 compared to S-CPC are 1.375% and 47% respectively. Additionally, M-CPC4 can significantly reduce the higher energy peak and ameliorate the nonuniform flux distribution on the absorber.
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
Green & Sustainable Science & Technology
Hamza Riaz, Muzaffar Ali, Javed Akhter, Nadeem Ahmed Sheikh, Muhammad Rashid, Muhammad Usman
Summary: An involute-shaped solar compound parabolic collector (CPC) with a variable concentration ratio along its length was developed and analyzed in terms of its optical and thermal performance. The results showed that the collector installed in the east-west (E-W) direction had better optical and thermal performance compared to the north-south (N-S) orientation.
Article
Energy & Fuels
Muhammad Khalid, Jinjia Wei, Sunila Bakhsh, Mumtaz A. Qaisrani, Muhammad Sohail, Jiabin Fang
Summary: This paper evaluates low-profile solar concentrators with low-material consumption that improve the optical performance of Crossed-Compound-Parabolic-Concentrators (CCPCs) by using Eliminating-Multiple-Reflections (EMR). Three CCPC designs, LEMR, HEMR, and hybrid, were analysed using Monte-Carlo ray tracing, with optical efficiency and light flux uniformity as primary metrics. The results showed that the LEMR and HEMR CCPCs achieved high optical efficiency and low light flux non-uniformity, while the hybrid CCPC had advantages for seasonal tracking applications.
Review
Energy & Fuels
Faisal Masood, Nursyarizal B. Mohd Nor, Irraivan Elamvazuthi, R. Saidur, Mohammad Azad Alam, Javed Akhter, Mohammad Yusuf, Shahid M. Ali, Mohsin Sattar, Maveeya Baba
Summary: This article provides a comprehensive review of recent developments in compound parabolic concentrators (CPCs) designs and applications for photovoltaic (PV) systems. CPCs have the ability to collect both direct and diffuse solar radiation, making them suitable for stationary installation and increasing the electrical energy produced by PV modules. However, there are still challenges to be addressed for CPCs, including energy losses and relatively low concentration ratios.
Article
Chemistry, Multidisciplinary
Dimitrios N. Korres, Evangelos Bellos, Panagiotis Lykas, Christos Tzivanidis
Summary: This study investigates the thermal and optical characteristics of an innovative parabolic trough concentrator coupled to a twin cavity receiver in evacuated tube conditions. The proposed design is compared with a design with a flat receiver to evaluate its efficiency. The results show that the proposed collector has higher thermal performance than the typical collector.
APPLIED SCIENCES-BASEL
(2022)
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
Green & Sustainable Science & Technology
Rongji Xu, Zhencheng He, Liwei Yang, Shuhui Xu, Ruixiang Wang, Huasheng Wang
Summary: The compound parabolic concentrator is a non-imaging concentrator that can concentrate solar radiation without a tracking system. To increase the effective working hours at high concentration ratio, a tracking solar collector is proposed that integrates the compound parabolic concentrator and flat microchannel tube.
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
Thermodynamics
Sajid Abbas, Yanping Yuan, Atazaz Hassan, Jinzhi Zhou, Ammar Ahmed, Li Yang, Emmanuel Bisengimana
Summary: The proper design and accurate selection of operating parameters are crucial for solar energy conversion and utilization in a parabolic dish concentrator system. This study comprehensively investigated the design, simulation, and experimental thermal performance of a conical cavity tube receiver for parabolic dish concentrators at various concentration ratios. The results showed that the conical receiver had an average exergy efficiency of 8.16% and an energy efficiency of 65.81% at the highest concentration ratio of 31.15. The findings provide valuable insights for optimizing the design of parabolic dish concentrator systems.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Julian D. Osorio, Alejandro Rivera-Alvarez
Summary: In this work, the thermal and economic performance of parabolic trough collectors (PTCs) and PTCs with double glass envelope (DGE-PTCs) were analyzed, with DGE-PTCs showing higher thermal and economic performance at high operating temperatures. The study provides an opportunity for new PTC designs pursuing higher operating temperatures to achieve superior thermal cycle efficiencies.
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)
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
Naveed Ur Rehman, Muhammad Uzair
Summary: This paper compares the energy collection performance of different layouts and settings, and ranks them based on their performance. The results show that the north-facing landscape layout performs the best, while the east-west-facing layouts have relatively poorer performance.
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Green & Sustainable Science & Technology
Naveed ur Rehman, Muhammad Uzair
Summary: This paper focuses on the research of parabolic trough collectors for solar concentrating photovoltaic applications, and proposes a method to optimize the shape of concentrators to achieve high flux homogeneity. By introducing guide points and using Newton Interpolation Polynomial, the shape of the concentrator was customized, and ray tracing and Particle Swarm Optimization algorithm were used to improve the performance.
Article
Engineering, Mechanical
Muhammad Uzair, Mubashir Ali Siddiqui, Usman Allauddin
Summary: This study analyzed the effect of focal length on the performance of the coupled cavity-dish system using numerical simulations, and found that the heat loss is a stronger function of tilt angle.
TRANSACTIONS OF THE CANADIAN SOCIETY FOR MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Muhammad Uzair, Syed Umair Hasan Kazmi, Muhammad Uzair Yousuf, Asad Ali Zaidi
Summary: This study analyzes collector geometry for Karachi and Pakistan, calculates the optimal tilt and azimuth angle for potential solar park locations, and suggests adjusting the tilt angle monthly for high-energy producing areas and using a fixed annual tilt for low-energy producing regions.
TRANSACTIONS OF THE CANADIAN SOCIETY FOR MECHANICAL ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Muhammad Uzair, Naveed Ur Rehman, Muhammad Uzair Yousuf
Summary: This paper presents a methodology for performing sensitivity analysis on the capital and energy production costs of off-grid Building Integrated Photovoltaic (BIPV) systems. The correlations between different influencing parameters and costs were derived using Latin hypercube sampling and log-log regression, and the effects of parameter changes on costs were quantified and ranked.
Article
Engineering, Mechanical
Mahad Shaikh, Muhammad Uzair, Syed Ahmad Raza
Summary: This study focused on the use of solar power for food preparation and the optimization of a thermal energy storage system. By selecting appropriate materials, the researchers were able to improve system efficiency and reduce costs, making this eco-friendly system more practical and affordable.
TRANSACTIONS OF THE CANADIAN SOCIETY FOR MECHANICAL ENGINEERING
(2022)
Article
Engineering, Mechanical
Atif Shazad, Junaid Jadoon, Muhammad Uzair, Maaz Akhtar, Abdul Shakoor, Muhammad Muzamil, Mohsin Sattar
Summary: This study investigated the rusting problems in the production of rebar steel and identified various corrosion causes, such as intergranular and pitting corrosion. The corroded rebar showed reduced mechanical properties. Environmental factors were also found to be involved in the deterioration of the rebar surface.
TRANSACTIONS OF THE CANADIAN SOCIETY FOR MECHANICAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Muhammad Uzair, Asad A. Naqvi, Maaz Akhtar, Asad A. Zaidi, Syed Umair Hasan Kazmi
Summary: This research compared different solar models' predictions of solar radiation in Karachi with measured data and found that the Hargreaves model yielded the most accurate results, while the Raja 3 model performed poorly. The study suggests that established empirical correlations can be used for the proper utilization of solar energy.
Article
Engineering, Multidisciplinary
Muhammad Uzair, Naveed Ur Rehman
Summary: This paper argues that the optical concentration ratio (C-opt) should be used when the receiver width exceeds a certain value in a parabolic trough collector (PTC). A model for evaluating C-opt, considering the incidence angle and surface irregularities, has been developed. The results show that C-opt is approximately 80% to 90% of C-g for a perfect parabolic surface, and the concentration ratio is significantly affected by surface irregularities. Useful tools and mathematical relationships are provided for designers and researchers to evaluate C-opt.
FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH
(2022)
Article
Thermodynamics
Adnan Rasheed, Usman Allauddin, Hafiz Muhammad Ali, Muhammad Uzair, Patrick G. Verdin, Yasir H. Siddiqui
Summary: This research focuses on the heat transfer of a single jet flow over a heated surface with detached ribs. A computational study is conducted to examine the effects of the ribs. Different dimensions of a rectangular rib design are studied to understand their impact on heat transfer at various nozzle positions.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Multidisciplinary
Muhammad Uzair, Naveed Ur Rehman
Summary: This study optimized a single slope solar still with reflecting walls and externally reflecting boosters using an optical irradiance model and a 3-D hybrid recursive ray tracing method. The model was validated and used to determine the optimum values for booster lengths and angles for different still designs. Particle Swarm Optimization (PSO) was utilized due to the high dimensionality of the problem. Contour plots were developed to visualize the effects of changing booster angles on performance.
FORSCHUNG IM INGENIEURWESEN-ENGINEERING RESEARCH
(2023)
Article
Engineering, Multidisciplinary
Atif Shazad, Muhammad Uzair
Summary: The use of conventional energy resources in the residential sector contributes to global warming, prompting the need for alternative energy sources to maintain indoor comfort. Solar energy conversion techniques are increasingly being explored to provide clean energy and enhance indoor climate comfort. This study provides an overview of recent advancements in solar energy utilization and discusses both non-concentrating and concentrating conversion techniques, as well as the incentives for merging solar energy with the human comfort industries.
MEMORIA INVESTIGACIONES EN INGENIERIA
(2023)
Article
Multidisciplinary Sciences
Syed Aun Ali Rizvi, Muhammad Uzair
Summary: This study investigates the geometry and configuration of secondary reflectors in a solar parabolic trough collector. The optical efficiency is analyzed using four different profiles of secondary reflectors. Ray-tracing software is used to simulate and analyze their effects on flux uniformity and intensity. The results show that the parabolic reflector has the highest efficiency, increasing solar flux by 37% with high uniformity. Triangular reflectors enhance solar flux by 28% but have weaker flux distribution. The flat-parabolic reflector is the second best option, improving flux by 32% and providing improved uniformity. The parabolic-parabolic segmented reflector has the lowest efficiency due to the non-uniformity caused by the divergence of its focal points.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Nihal Naseer, Asad A. Zaidi, Hamdullah Khan, Sagar Kumar, Muhammad Taha Bin Owais, Yasmin Abdul Wahab, Kingshuk Dutta, Juhana Jaafar, Muhammad Uzair, Mohd Rafie Johan, Irfan Anjum Badruddin
Summary: Steady growth in desalination literature has been observed over the last few decades. This study conducted a quantitative analysis of desalination literature published in the last 30 years using bibliometric and content analysis techniques. The analysis revealed the increase in attention given to desalination after the year 2000. The study also identified the hot themes and important factors in desalination research, concluding that reverse osmosis is the best available technology.
GREEN PROCESSING AND SYNTHESIS
(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.
