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
Thermodynamics
Xiaojing Li, Pengpeng Yan, Jiangjiang Wang, Tao Yang
Summary: This study presents a numerical simulation of parabolic trough solar collector systems with different forms of vortex generators inserted in the absorber tube using [EMIM][BF4] ionic liquid. The effects of varying parameters on the thermal performance of the system are discussed. The results show that the use of vortex generators can significantly improve the thermal efficiency and exergetic efficiency of the system under certain parameters.
APPLIED THERMAL ENGINEERING
(2024)
Article
Green & Sustainable Science & Technology
Anass Zaaoumi, Abdellah Bah, Mihaela Ciocan, Patrick Sebastian, Mugur C. Balan, Abdellah Mechaqrane, Mohammed Alaoui
Summary: In this study, three models were used to estimate the hourly electric production of a parabolic trough solar thermal power plant in Eastern Morocco. The results show that the artificial neural networks (ANN) model performs better than the analytical models, accurately estimating the energy production.
Article
Green & Sustainable Science & Technology
Oveepsa Chakraborty, Sujit Roy, Biplab Das, Rajat Gupta
Summary: The study finds that a parabolic solar trough collector with a helical absorber tube performs better in terms of heat transfer rate, efficiency, and exergy efficiency compared to traditional collectors with smooth absorber tubes. The presence of a helical absorber tube increases the net surface area of the absorber, leading to a significant enhancement in useful heat transfer rate. Overall efficiencies are 3.5%-10% higher for the helical absorber tube based PTC, showing the advantages of this design over the traditional smooth absorber tube design.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Green & Sustainable Science & Technology
Sanaz Akbarzadeh, Mohammad Sadegh Valipour
Summary: This experimental study investigated the effects of corrugated tubes at different pitch ratios on the performance of parabolic trough collectors (PTCs). The results showed that PTCs using corrugated tubes had the highest performance in the transitional regime, with a maximum Nusselt number increase of 4.2 and a thermal performance factor increase of 26%-176%.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Engineering, Chemical
Morteza Babapour, Sanaz Akbarzadeh, Mohammad Sadegh Valipour
Summary: This study investigates the improvement of thermal performance in a parabolic trough collector using nanofluids and corrugated absorber tubes. Results show a significant increase in Nusselt number and friction factor, with the thermal performance factor reaching its maximum at specific conditions.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Thermodynamics
Mohammad Mahdi Heyhat, Murtadha Zahi Khattar
Summary: The paper investigates the impact of different placement schemes of porous foam on the thermal efficiency of a direct absorption solar collector. Ten different layouts of open cell copper porous foam are examined. The results show that placing the foam in the lower half of the absorber tube leads to higher thermal efficiency. The peripheral placement of porous foam is preferred considering the performance index, and higher pore density (PPI) can result in higher thermal efficiency.
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
Bijan Darbari, Mohammad Derikvand, Bahman Shabani
Summary: This study presents a thorough numerical investigation of a LS-2 parabolic trough collector (PTC) to introduce a manufacturable structure with high performance. The effects of design shapes, diameters, spacings, and PPI of porous materials, as well as thermal and fluidic features, on the performance of PTC are studied. It is found that increasing PPI and diameter while reducing space gaps can improve the thermal efficiency of PTC. The effects of volumetric flow rate and inlet flow temperature on thermal efficiency are also analyzed.
APPLIED THERMAL ENGINEERING
(2023)
Review
Environmental Studies
Oveepsa Chakraborty, Sujit Roy, Biplab K. Debnath, Sushant Negi, Marc A. Rosen, Sadegh Safari, Mamdouh El Haj Assad, Rajat Gupta, Biplab Das
Summary: This study provides a comprehensive review of parabolic trough collectors (PTCs) from the perspective of design and thermal characteristics. It explores the use of nanofluids and inserts to enhance PTC performance and proposes recommendations for future research.
ENERGY & ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Manmeet Singh, Manoj Kumar Sharma, Jishnu Bhattacharya
Summary: Improving efficiency and yield of a parabolic trough collector (PTC) field is crucial, with factors such as mass flow rate, aperture width, flow rate, rim angle and design hours of operation needing careful tuning for maximizing annual energy yield. The methodology demonstrated for Kanpur, India can be generally applicable to any location or working fluid.
Article
Energy & Fuels
Oveepsa Chakraborty, Biplab Das, Rajat Gupta
Summary: This study investigates the performance of parabolic trough collectors with rotating receiver tubes and elliptical inserts. By utilizing hybrid nanofluid as the working medium and adjusting the flow rate and receiver speed, enhanced temperature, heat transfer coefficient, and thermal efficiency are achieved. The use of rotating receiver tubes and elliptical inserts mitigates the uneven temperature distribution and improves the overall efficiency.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Saman Samiezadeh, Roozbeh Khodaverdian, Mohammad Hossein Doranehgard, Hamed Chehrmonavari, Qingang Xiong
Summary: Numerical simulations in this study showed that increasing the volume fraction of Cu nanoparticles can enhance the temperature gain at the exit of the receiver tube within certain Reynolds numbers. Additionally, increasing the volume fraction of Cu and Al2O3 nanoparticles can improve thermal efficiency with slight adverse effects on the friction factor. Moreover, higher permeability has minimal impact on thermal efficiency but can significantly reduce the friction factor.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Qiliang Wang, Yao Yao, Zhicheng Shen, Hongxing Yang
Summary: A novel parabolic trough collector-photovoltaic (PTC-PV) system is proposed to enhance the thermal performance and solar utilization efficiency. Mathematical models are established and experiments are conducted to validate the superior performance of the hybrid PTC-PV system.
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
Engineering, Mechanical
M. Cervantes-Bobadilla, J. A. Hernandez-Perez, D. Juarez-Romero, A. Bassam, J. Garcia-Morales, A. Huicochea, O. A. Jaramillo
Summary: This paper presents a new nonlinear control approach for water outlet temperature control in a parabolic trough collector using an inverse artificial neural network and particle swarm optimization algorithm. The method is capable of operating under different system reference points and has been validated through simulations under various environmental conditions.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2021)
Article
Engineering, Mechanical
R. A. Conde-Gutierrez, D. Colorado, S. L. Hernandez-Bautista
Summary: This study compares the performance of an artificial neural network (ANN) with a Gompertz model using different optimization algorithms for modeling and predicting the cumulative deaths from COVID-19 in Mexico. The results show that the ANN model better fits the real data, and different optimization algorithms have different impacts on coefficients and parameters.
NONLINEAR DYNAMICS
(2021)
Article
Green & Sustainable Science & Technology
Rasikh Tariq, Nadeem Ahmed Sheikh, A. Livas-Garcia, J. Xaman, A. Bassam, Valeriy Maisotsenko
Summary: In the coming decades, a large portion of the world population is expected to embrace urbanization, leading to a significant increase in the demand for thermal comfort. Alternates to conventional air-cooling systems, such as water-based evaporation cooling, are being explored to address sustainability issues. The development of efficient systems like the Maisotsenko cycle shows promise but may pose challenges in terms of water usage on a large scale. The key focus for the future of air-cooling systems is to improve water conservation, energy efficiency, and cost-effectiveness.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Javier E. Barron-Diaz, Emmanuel A. Flores-Johnson, Danny G. Chan-Colli, J. Francisco Koh-Dzul, Ali Bassam, Luis D. Patino-Lopez, Jose G. Carrillo
Summary: This study experimentally and numerically investigated the thermal performance of non-tracking, small-size, and low-cost CPC solar collectors, showing that CPC with finned absorber has better performance. The numerical methodology involving ray tracing simulation and FEM-CFD simulation is capable of estimating heat flux and heat transfer, making it an important tool for designing CPC collectors.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
M. Moheno-Barrueta, O. May Tzuc, G. Martinez-Pereyra, V Cardoso-Fernandez, L. Rojas-Blanco, E. Ramirez-Morales, G. Perez-Hernandez, A. Bassam
Summary: This study presents a hybridization strategy using an inverse artificial neural network model and metaheuristic optimization algorithms to optimize drying velocity for plantain and taro in an active indirect solar dryer. Experimental results showed that the maximum drying velocities were achieved at 9 V, with taro having higher drying velocity than plantain. The hybrid strategy demonstrated good performance in optimization, particularly with genetic algorithms, indicating potential for future practical applications in solar drying technologies.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
M. Lounis, O. Torrealba-Rodriguez, R. A. Conde-Gutierrez
Summary: This study aimed to predict the number of COVID-19 cases, deaths and recoveries in Algeria using reported data, comparing four models and finding that the logistic model had the best precision in predicting cases.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
E. Cruz May, A. Bassam, Luis J. Ricalde, M. A. Escalante Soberanis, O. Oubram, O. May Tzuc, Alma Y. Alanis, A. Livas-Garcia
Summary: This study combines global sensitivity analysis with data-driven techniques to evaluate the interaction of the Mexican electricity market and assess the impact of parameters on locational marginal prices. It compares three artificial intelligence techniques for predicting electricity prices under real-time market conditions. The results show that the impact of variables fluctuates depending on market and consumption conditions.
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
(2022)
Review
Green & Sustainable Science & Technology
Wassila Ajbar, A. Parrales, A. Huicochea, J. A. Hernandez
Summary: This paper presents a comprehensive review of experimental, numerical, and numerical-experimental studies on improving PTSC performance. The combination of nanofluids and turbulators is found to be the most effective in enhancing thermal efficiency. Furthermore, the dispersion of Cu and CuO in the base fluid shows significant improvement in heat transfer coefficient. The analysis of PTSC performance improvement publications reveals China as the leading contributor, followed by India.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Roberto I. Rico-Camacho, Luis J. Ricalde, Ali Bassam, Manuel I. Flota-Banuelos, Alma Y. Alanis
Summary: The paper proposes an algorithm for MPPT that accurately identifies power changes caused by irradiance changes and achieves maximum power point tracking through accurate judgment of the perturbation direction, resulting in better tracking performance compared to traditional algorithms.
APPLIED SCIENCES-BASEL
(2022)
Article
Energy & Fuels
Manuel Flota-Banuelos, Homero Miranda-Vidales, Bernardo Fernandez, Luis J. Ricalde, A. Basam, J. Medina
Summary: This paper presents a robust variable structure control method for a three-phase grid-tied inverter with an LCL filter. The proposed control scheme features a novel partial state observer that compensates for current harmonics and eliminates the need for physical current sensors, reducing cost and noise.
Article
Thermodynamics
Wassila Ajbar, J. A. Hernandez, A. Parrales, Lizeth Torres
Summary: This paper investigates the use of eight hybrid nanofluids to improve the thermal efficiency of a parabolic trough solar collector (PTSC). The developed thermal model shows good agreement with experimental data, with an average error of 1.92% and 2.34% in calculating outlet temperature and thermal efficiency. The simulation results demonstrate that the thermal efficiency of PTSC can achieve a maximum improvement of 2.8% using hybrid nanofluids and an average improvement of 1.6% compared to Syltherm 800.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
W. Ajbar, J. E. Solis-Perez, E. Viera-Martin, A. Parrales, J. F. Gomez-Aguilar, J. A. Hernandez
Summary: This study provides improved models of the classical ANN model to predict the outlet temperature and thermal efficiency of PTSC. The results show that using specific transfer and activation functions in the ANN model can achieve better prediction performance.
SUSTAINABLE ENERGY GRIDS & NETWORKS
(2023)
Article
Engineering, Chemical
U. Cruz-Jacobo, R. A. Conde-Gutierrez, J. A. Hernandez, S. Silva-Martinez, D. Colorado, D. Juarez-Romero, A. Alvarez-Gallegos
Summary: This study implemented a new optimization strategy using a multivariable inverse artificial neural network (ANNim) and particle swarm optimization (PSO) algorithm to increase the removal efficiency of commercial herbicides in a sonophotocatalysis process. By optimizing multiple input variables, the study achieved complete removal of commercial herbicides in a shorter time.
DESALINATION AND WATER TREATMENT
(2022)
Article
Thermodynamics
Hai Zhao, Puzhen Gao, Xiaochang Li, Ruifeng Tian, Hongyang Wei, Sichao Tan
Summary: This study numerically investigates the interaction between flow-induced vibration and forced convection heat transfer in a tube bundle. The results show that the impact of flow-induced vibration on heat transfer varies in different flow velocity regions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rohit Chintala, Jon Winkler, Sugirdhalakshmi Ramaraj, Xin Jin
Summary: The current state of fault detection and diagnosis for residential air-conditioning systems is expensive and not suitable for widespread implementation. This paper proposes a cost-effective solution by introducing an automated fault detection algorithm as a screening step before more expensive tests can be conducted. The algorithm uses home thermostats and local weather information to identify thermodynamic parameters and detect high-impact air-conditioning faults.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
A. Azimi, N. Basiri, M. Eslami
Summary: This paper presents a novel optimization algorithm for improving the water-film cooling system of photovoltaic panels, resulting in a significant increase in net energy generation.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Duc-Thuan Phung, Chin-Hsiang Cheng
Summary: In this study, a novel CFDMD model is used to analyze and investigate the behavior of thermal-lag engines (TLE). The study shows that the CFDMD model effectively captures the thermodynamic behavior of the working gas and the dynamic behavior of the engine mechanism. Additionally, the study explores the temporal evolution of engine speed and the influence of various parameters on shaft power and brake thermal efficiency. The research also reveals the existence of a thermal-lag phenomenon in TLE.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Haiying Yang, Yinjie Shen, Lin Li, Yichen Pan, Ping Yang
Summary: The purpose of this article is to find a measure to improve the interfacial thermal transfer of graphene/silicon heterojunction. Through molecular dynamics simulation, it is found that surface modification can significantly reduce the thermal resistance, thereby improving the thermal conductivity of the graphene/silicon interface.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Qiong Wu, Yancheng Wang, Haonan Zhou, Xingye Qiu, Deqing Mei
Summary: This article introduces a visible methanol steam reforming microreactor, which uses an optical crystal as an observation window and measures the reaction temperature in real-time using infrared thermography. The results show that under lower oxygen to carbon ratio conditions, the microreactor has a higher heating rate and a stable gradient in temperature distribution.
APPLIED THERMAL ENGINEERING
(2024)
Review
Thermodynamics
Giulia Manco, Umberto Tesio, Elisa Guelpa, Vittorio Verda
Summary: In the past decade, there has been a growing interest in studying energy systems for the combined management of power vectors. Most of the published works focus on finding the optimal design and operations of Multi Energy Systems (MES). However, for newcomers to this field, understanding how to achieve the desired optimization details while controlling computational expenses can be challenging and time-consuming. This paper presents a novel approach to analyzing the existing literature on MES, with the aim of guiding practical development of MES optimization. Through the discussion of six case studies, the authors provide a mathematical formulation as a reference for building the model and emphasize the impact of different aspects on the problem nature and solver selection. In addition, the paper also discusses the different approaches used in the literature for incorporating thermal networks and storage in the optimization of multi-energy systems.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xuepeng Yuan, Caiman Yan, Yunxian Huang, Yong Tang, Shiwei Zhang, Gong Chen
Summary: In this study, a multi-scale microgroove wick (MSMGW) was developed by laser irradiation, which demonstrated superior capillary performance. The surface morphology and performance of the wick were affected by laser scan pitch, laser power, repetition frequency, and scanning speed. The MSMGW showed optimal capillary performance in alumina material and DI water as the working fluid.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Maofei Mei, Feng Hu, Chong Han
Summary: This paper proposes an effective local search method based on detection of droplet boundaries for understanding the dynamic process of droplet growth during dropwise condensation. The method is validated by comparing with experimental data. The present simulation provides an effective approach to more accurately predict the nucleation site density in future studies.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Rahul Kumar Sharma, Ashish Kumar, Dibakar Rakshit
Summary: The study explores the use of phase change materials (PCM) as a retrofit with Heating Ventilation and Air-conditioning systems (HVAC) to reduce energy consumption and improve air quality. By incorporating PCM with specific thickness and fin configurations, significant energy savings can be achieved in comparison to standard HVAC systems utilizing R134a. This research provides policymakers with energy-efficient and sustainable solutions for HVAC systems to combat climate change.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Zhenhua Ren, Xiangjin Meng, Xingang Qi, Hui Jin, Yunan Chen, Bin Chen, Liejin Guo
Summary: This paper investigates the heat transfer mechanism and factors influencing thermal radiation in the process of supercritical water gasification (SCWG) of coal, and proposes a comprehensive numerical model to simulate the process. Experimental validation results show that thermal radiation accounts for a significant proportion of the total heat exchange in the reactor and a large amount of radiant energy exists in the important spectral range of supercritical water. Enhancing radiative heat transfer can effectively increase the temperature of the reaction medium and the gasification rate.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Mauro Abela, Mauro Mameli, Sauro Filippeschi, Brent S. Taft
Summary: Pulsating Heat Pipes (PHP) are passive two-phase heat transfer devices with a simple structure and high heat transfer capabilities. The actual unpredictability of their dynamic behavior during startup and thermal crisis hinders their large-scale application. An experimental apparatus is designed to investigate these phenomena systematically. The results show that increasing the number of evaporator sections and condenser temperature improves the performance of PHP. The condenser temperature also affects the initial liquid phase distribution and startup time.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Ke Gan, Ruilian Li, Yi Zheng, Hui Xu, Ying Gao, Jiajie Qian, Ziming Wei, Bin Kong, Hong Zhang
Summary: A 3-dimensional enhanced heat pipe radiator has been developed to improve heat dissipation and temperature uniformity in cooling high-power electronic components. Experimental results show that the radiator has superior heat transfer performance compared to a conventional aluminum fin radiator under different heating powers and wind speed conditions.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xinyi Zhang, Shuzhong Wang, Daihui Jiang, Zhiqiang Wu
Summary: This study focuses on recovering waste heat from blast furnace slag using dry centrifugal pelletizing technology. A comprehensive two-dimensional model was developed to analyze heat transfer dynamics and investigate factors influencing heat exchange efficiency. The findings have important implications for optimizing waste heat recovery and ensuring safe operations.
APPLIED THERMAL ENGINEERING
(2024)
Article
Thermodynamics
Xincheng Wu, An Zou, Qiang Zhang, Zhaoguang Wang
Summary: The boosting heat generation rate of high-performance processors is challenging traditional cooling techniques. This study proposes a combined design of active jet intermittency and passive surface modification to enhance heat transfer.
APPLIED THERMAL ENGINEERING
(2024)