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
Yu-tian Hou, Xiao-hui Yu, Bin Yang, Shuai-shuai Liu, Yao Qi
Summary: A mathematical model was developed in this paper to investigate and evaluate the optical properties of a parabolic trough solar collector (PTC) system with a flat receiver. The optimal geometric design for the same geometrical focusing ratio was derived through simulations. The study found that the optical performance has large variations in local concentration ratio (LCR) at the center of the flat receiver and is superior at rim angles of 75 degrees - 90 degrees under ideal conditions.
Article
Thermodynamics
Michael de Oliveira Resende, Monique Ellen Torres da Silva, Augusto Cesar Laviola de Oliveira, Marcio Aredes Martins
Summary: This study developed and tested a prototype of a parabolic trough to propose an alternative energy receiver for small-scale thermal energy production. The performance of the alternative receiver tube was evaluated under different conditions, and its optical and thermal efficiencies were analyzed. The economic analysis showed that the alternative energy receiver tube is economically and technically suitable for parabolic trough systems for heat production.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Muhammed A. Hassan, Abdelrahman Galal, Loiy Al-Ghussain, Mohamed Sayed, Ahmad M. Abubaker, Adnan Darwish Ahmad, Mahmoud A. Kassem
Summary: This study presents a new 1-D analytical model, coupled with Monte Carlo ray tracing, to evaluate internally shielded receivers for parabolic trough concentrators. The results indicate that increasing the tube diameter reduces the dependency on tube eccentricity, but also decreases the optical performance. Shielding the receiver is beneficial for opening angles up to 160 degrees. The proposed shielded receivers can significantly enhance the efficiency of the integrated systems with minimal economic and environmental impacts.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Lyudmila Knysh
Summary: A new efficient computational approach was proposed for determining the main design parameters of the parabolic trough receiver, based on dimensionless mathematical models and algorithms. The study established a single criterial dependency for temperature fields, considering the impact of concentrator surface errors and tube receiver design. The results provide users with a convenient way to evaluate and predict thermo-fluid parameters for different parabolic trough concentrator geometries, useful for analysis during design and operational stages.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Green & Sustainable Science & Technology
Natraj, B. N. Rao, K. S. Reddy
Summary: Concentrating solar power is a renewable energy technology that uses mirrors to focus sunlight and generate heat. However, the high cost of mirrors and support systems to maintain precise shape poses a challenge in competing with other solar power technologies.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
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
Energy & Fuels
Dongqiang Lei, Yucong Ren, Zhifeng Wang
Summary: This paper investigates the heat loss mechanism in the parabolic trough receiver by analyzing conduction and radiation heat losses. A 2-D heat transfer model is established and various factors are analyzed to understand their effects on heat losses. The findings provide a theoretical basis for improving the receiver and reducing heat loss in operation and maintenance.
FRONTIERS IN ENERGY
(2022)
Article
Energy & Fuels
Muhammad Uzair, Naveed Ur Rehman, Muhammad Asif
Summary: This study developed a methodology to determine the intercept factor and investigated the effects of design parameters on the optical performance of parabolic trough collectors. The results provide insights into the influence of varying parameters on the intercept factor, which can be used by designers and researchers to optimize the design of parabolic trough collectors.
JOURNAL OF SOLAR ENERGY ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Thermodynamics
Zhilei Zhu, Ebrahim Nadimi, Muhammad Asadollahzadeh, Mehdi Bahari, Mahdi Zare Malek Abad, Mehdi Aliehyaei
Summary: This paper simulates the LS-3 parabolic trough solar collector using Monte Carlo Ray Tracing and computational fluid dynamics methods to study the effect of heat flux distribution around the absorber tube and the positioning of multiple line dipoles magnetic field on the performance of the collector.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Xiaoxia Lin, Caitou He, Wenjun Huang, Yuhong Zhao, Jieqing Feng
Summary: This paper proposes a more accurate Monte Carlo ray-tracing simulation method considering refraction and total internal reflection effects caused by the glass layer. Experiments and simulations reveal that refraction has non-negligible effects on the simulation results, reducing the radiative flux and total energy, and causing the reflection spot to spread or the ray to be trapped in the glass.
Article
Thermodynamics
P. Ferrer, Khaled Mohamad, M. C. Cyulinyana, Victor Kaluba
Summary: In this article, design approaches to a receiver enclosed in an opaque cavity and heated by a solar parabolic trough collector are discussed. The optimization of the interaction between the cavity receiver and the solar radiation from a collector mirror is explored, which differs from conventional receivers and is essential for utilizing the benefits of using a cavity sleeve. Through simulations, different focal plane positions and the relative sizes of the receiver elements are investigated, and a focal plane close to the surface of the absorber pipe is found to have the highest efficiency at 62%. An experimental cavity receiver and parabolic trough system are then built based on the simulations, and the simulation results are validated against measured data with a maximum discrepancy of 8%. A novel method using the cooling behavior of the receiver is also applied to confirm the physical parameters through simulations.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Tayeb Fahim, Samir Laouedj, Aissa Abderrahmane, Sorour Alotaibi, Obai Younis, Hafiz Muhammad Ali
Summary: This research numerically explores the impact of introducing obstacles to the receiver tube of a parabolic trough collector on heat transmission and overall thermal performance. The results show that obstacles can enhance the collector's thermal performance under specific geometrical parameters and spacing, and increasing the concentration of solid nanoparticles in the thermal oil improves heat transmission.
Article
Green & Sustainable Science & Technology
N. Sreenivasalu Reddy, S. Gowreesh Subramanya, K. C. Vishwanath, M. Karthikeyan, S. Kanchiraya
Summary: The experimental study shows that using a rotary receiver tube can significantly improve the performance of the parabolic trough collector, especially when increasing the friction factor. Additionally, thermal efficiency of the collector can be improved by reducing the inlet temperature and increasing the flow rate.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Thermodynamics
Peter Stewart Cumber
Summary: This paper explores the application of various variants of the Monte-Carlo method and quasi-Monte-Carlo method in evaluating three view factor configurations. The study finds that for two configurations, the numerical integration-based methods are more accurate than the ray tracing-based methods. However, for the configuration with a common edge, ray tracing performs better than numerical integration. A hybrid method that combines ray tracing and numerical integration is proposed for this configuration. The hybrid quasi-Monte-Carlo method is demonstrated to be the most efficient approach for evaluating the view factor integral.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
A. E. Rungasamy, K. J. Craig, J. P. Meyer
Summary: This paper compares the optical and thermal performance of four different types of receivers, filling the gap in the literature on comparative studies. The study finds that the adapted TERC-type monotube receiver is the best candidate for an etendue-conserving compact linear Fresnel field.
Article
Nanoscience & Nanotechnology
K. Ajith, Mallolu Jesse Aaron, Archana Sumohan Pillai, I. V. Muthuvijayan Enoch, A. Brusly Solomon, M. Sharifpur, J. P. Meyer
Summary: This investigation focuses on the influence of a magnetic field on the thermophysical properties and heat transfer of low-density ferrofluid. The optimal volume fraction of 0.05% was found to have the highest heat transfer performance at a wall temperature difference of 25 degrees C, with significant improvements compared to water.
APPLIED NANOSCIENCE
(2022)
Article
Thermodynamics
Jaco Dirker, Hannalie Scheepers, Josua P. Meyer
Summary: This article investigates the heat transfer characteristics of saturated flow boiling under non-uniform heat flux conditions. Experimental tests show that non-uniform heat flux conditions significantly reduce the average heat transfer coefficient, highlighting the need for further research on heat flux distribution.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Multidisciplinary
Solomon O. Giwa, Kayode A. Adegoke, Mohsen Sharifpur, Josua P. Meyer
Summary: This paper presents a bibliometric analysis of nanofluid research, revealing the research focus on heat transfer and flow applications. The analysis of co-authorship shows that institutions from Iran and Pakistan have published the highest number of papers, while the analysis of citation highlights highly cited papers and journals.
JOURNAL OF NANOPARTICLE RESEARCH
(2022)
Review
Thermodynamics
Suvanjan Bhattacharyya, Devendra Kumar Vishwakarma, Adithya Srinivasan, Manoj K. Soni, Varun Goel, Mohsen Sharifpur, Mohammad Hossein Ahmadi, Alibek Issakhov, Josua Meyer
Summary: The objective of this article is to study the work carried out in heat transfer augmentation using active and passive techniques. The study reviews research done in various areas such as electrohydrodynamic, magnetic field, corona wind, vortex generators, tape and coil inserts, roughness, and modified duct. It was found that passive methods are more investigated than active methods due to their safe and sound operation along with no additional requirement of power. The results show that duct modification is an effective and efficient way for heat transfer enhancement.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Review
Green & Sustainable Science & Technology
Sudhir Kumar Pathak, Pravin Omprakash Sharma, Varun Goel, Suvanjan Bhattacharyya, Hikmet S. Aybar, Josua P. Meyer
Summary: The PV/T system is proposed to decrease the thermal stress on the PV panel and improve its efficiency at high temperatures. This comprehensive review explores various PV cooling techniques, research gaps, and challenges, as well as the role of artificial intelligence in PV/T systems.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Thermodynamics
D. Wright, K. J. Craig, P. Valluri, J. P. Meyer
Summary: In this study, the heat transfer performance of single jet and multi-jet arrays in jet impingement boiling were investigated numerically. The numerical results showed good agreement with experimental data and previous studies. The effect of conjugate heat transfer and various parameters on the nucleate boiling regime were also studied.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Aggrey Mwesigye, Ibrahim Halil Yilmaz
Summary: This study investigates the performance of a large aperture width parabolic trough solar collector (PTSC) system with carbon dioxide (CO2) as the working fluid. The results show that supercritical CO2 has the best thermal performance compared to gaseous CO2.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Energy & Fuels
Mehrdad Zolfalizadeh, Saeed Zeinali Heris, Hadi Pourpasha, Mousa Mohammadpourfard, Josua P. P. Meyer
Summary: This study investigated the use of graphene nanoplate (GNP)/water nanofluids in a new shell-and-tube heat exchanger (STHE) and examined their impact on thermal efficiency, pressure drop, and heat transfer characteristics. The results showed that the addition of 0.06 wt.% GNP in the nanofluid improved the heat exchanger efficiency and heat transfer rate, but also increased pressure drops.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Thermodynamics
Marilize Everts, Mostafa Mahdavi, Mohsen Sharifpur, Josua P. Meyer
Summary: The thermal and hydrodynamic features of developing mixed convective laminar flow in a long horizontal tube were investigated numerically and experimentally. It was found that the conventional understanding of the merging boundary layer in internal tube flows needed modification, and methods were proposed to determine the development of the hydrodynamic and thermal boundary layers. The experimental and numerical results showed that the local mixed convective Nusselt numbers decreased near the tube inlet but increased along the tube length as secondary flow increased significantly.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Marilize Everts, Mostafa Mahdavi, Josua P. Meyer, Mohsen Sharifpur
Summary: The development of the thermal and hydrodynamic boundary layers of laminar flow in a smooth horizontal tube under forced convection conditions was studied. Numerical simulations using ANSYS Fluent 19.3 software were conducted, with a highly structured mesh and accurate temperature-dependent thermophysical properties. The simulations covered Reynolds numbers from 630 to 2000 and Prandtl numbers from 0.7 to 70. By analyzing velocity and temperature profiles, it was found that the conventional understanding of boundary layer merging in internal tube flows needed to be modified. Three distinct regions were identified in both the hydrodynamic and thermal entrance regions.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Tanimu Jatau, Tunde Bello-Ochende
Summary: The goal of this study is to achieve an optimal geometry of the U-bend tube heat exchanger by balancing pressure drop and heat transfer coefficient through minimizing entropy generation. The constructal design method and entropy generation techniques based on the second law of thermodynamics were used to conduct entropy generation minimization during two-phase flow boiling of R134a. Numerical computations were performed with different mass fluxes and qualities, and the results were consistent with those in the literature. It was found that the optimal parameters of the tube heat exchanger varied slightly with the increase in mass flux, but the stability of the optimized U-bend tube was maintained.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Green & Sustainable Science & Technology
J. H. de Beer, W. G. le Roux, A. Sciacovelli, J. P. Meyer
Summary: This study considers a recuperated solar-dish Brayton cycle with an off-the-shelf turbocharger as a micro-turbine and a rectangular cavity receiver with integrated thermal storage. The heat losses from the solar receiver were reduced by utilizing a novel glass channel cooled by the working fluid. The results showed lower solar-to-mechanical efficiencies but higher energy utilization factor when cogeneration was included.
Article
Engineering, Multidisciplinary
Ibrahim A. Fetuga, Olabode T. Olakoyejo, Sogo M. Abolarin, Adekunle O. Adelaja, Omotayo Oluwatusin, Joshua K. Gbegudu, Adrian U. Onwuegbusi, Oluwarotimi T. Shitta-Bey, Josua P. Meyer, Antonio Marcos de Oliveira Siqueira
Summary: This study numerically evaluates the thermohydraulic performance of a circular tube, which consists of semi-alternated twisted tape with cylindrical baffles and ternary nanofluid as a working fluid. The results show that, when the pitch ratio of the twisted tape decreases from 5.77 to 1.77, there is a significant improvement in the Nusselt number, pumping power, and thermal performance factor. Similarly, with an increase in the width ratio and thickness ratio, there is an increase in the Nusselt number, pressure drop, and thermal performance factor.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Emmanuel O. Atofarati, Mohsen Sharifpur, Josua Meyer
Summary: This study investigates the impact of hybrid nanofluids and certain jet hydrodynamic effects on enhancing the cooling efficiency. The findings show that the hybrid nanofluids can achieve a higher heat transfer enhancement under different parameters.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.
