Article
Thermodynamics
El Hadji Cisse, Ababacar Thiam, Baye Alioune Ndiogou, Dorothe Azilinon, Vincent Sambou
Summary: In this article, the effect of solar radiation concentration on a solar chimney collector was experimentally studied. Results showed that the addition of reflectors increased the temperature and improved the performance of the chimney for better natural ventilation in bioclimatic buildings.
CASE STUDIES IN THERMAL ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Syed Noman Danish, Zeyad Almutairi, Meshari Sameer Alluqmani, Yusif A. Alghamdi
Summary: This study examines the feasibility of introducing renewable energy solutions in the oil industry to reduce natural gas consumption and increase crude oil temperature. A parabolic trough system is designed and evaluated using MATLAB simulation. The results show that this solution could potentially result in significant natural gas savings, reduction in CO2 emissions, and cost savings.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Muhammet Mustafa Benlioglu, Mehmet Onur Karaagac, Alper Ergun, Lhan Ceylan, Ismail Hamad Guma Ali
Summary: In recent years, there has been an increase in the use of solar energy due to its practical, environmental, and economic benefits. Solar drying systems have been implemented in the drying industry to reduce costs and improve product quality. This study designed a novel solar drying system that combines concentrated solar air collector and concentrated photovoltaic/thermal system, along with an automation system for data acquisition and temperature control. The efficiency and sustainability of the system were evaluated, and the results showed promising performance.
Article
Green & Sustainable Science & Technology
Natraj, B. N. Rao, K. S. Reddy
Summary: Solar energy, an emerging technology, is increasingly utilizing concentrating power technology in solar power plants, with the structural stability of parabolic trough collectors being crucial in maintaining optical and thermal efficiencies under wind loads. The study highlights the impact of wind loads on slope deviations and the importance of yaw and pitch angles in collector design, as well as the differences in performance between collectors made of different materials.
Article
Thermodynamics
Adam R. Jensen, Ioannis Sifnaios, Bengt Perers, Jan Holst Rothmann, Soren D. Morch, Poul V. Jensen, Janne Dragsted, Simon Furbo
Summary: This study presents the design and performance of the Bronderslev hybrid plant, which is the world's first CSP-biomass plant to utilize waste heat. The plant successfully provides heat to the local district heating grid using a combination of solar collector field and biomass boilers, and the ORC system achieves high electrical efficiency. The results demonstrate the reliable operation of the hybrid plant and the potential of CSP-biomass hybridization.
ENERGY CONVERSION AND MANAGEMENT
(2022)
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
Green & Sustainable Science & Technology
Muhammad Imtiaz Hussain, Gwi Hyun Lee
Summary: This study proposes a multi-conical solar concentrating system for drying agricultural products, which shows significant improvements in thermal performance and drying time reduction. The economic and environmental analyses demonstrate the high efficiency of the nanofluid-powered multi-conical solar drying system.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Qiliang Wang, Gang Pei, Hongxing Yang
Summary: The novel parabolic trough solar receiver with a radiation shield, based on the theory of the negative thermal-flux region, shows great potential for significant enhancement of the techno-economic performance of solar power plants, improving electrical energy production and reducing the levelized cost of energy.
Article
Thermodynamics
Bernardo Bergantini Botamede, Leandro Oliveira Salviano
Summary: This study investigates various layout alternatives for coupling a hybrid solar plant with an operational combined cycle powerplant in Brazil. The parabolic trough collector is examined as the focal point of the study, using oil and molten salt as working fluids. Through the development and validation of thermodynamic models, it was found that layouts utilizing solar energy for superheating saturated steam yielded the best performance, with a solar-to-electric conversion efficiency of up to 32.29%.
APPLIED THERMAL ENGINEERING
(2023)
Review
Environmental Sciences
Kolli Harish Kumar, Ahmed M. Daabo, Malay K. Karmakar, Harish Hirani
Summary: Energy demand is increasing, making the use of renewable energy sources, particularly solar thermal systems, essential. The parabolic dish solar concentrator is a preferred choice due to its high efficiency, power density, low maintenance, and durability. This paper reviews the design parameters and receiver geometry's effects on system efficiency, proposing methods to improve the overall efficiency.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Hegazy Rezk, Irik Z. Mukhametzyanov, Mohammad Ali Abdelkareem, Tareq Salameh, Enas Taha Sayed, Hussein M. Maghrabie, Ali Radwan, Tabbi Wilberforce, Khaled Elsaid, A. G. Olabi
Summary: Solar thermal power technologies have the potential to replace conventional fossil fuel power plants, and different technologies have varying technical, economical, and environmental aspects. By using multi-criteria decision making models, the best solar thermal power technology can be determined, with solar power dish technology (A4) being the top choice.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Thermodynamics
Mohamed E. A. Ali, Amr. A. Sayed Alahl, Doaa S. Salama, Hamdy H. El-Ghetany, A. H. M. El-Aassar, Moustafa M. Abouelfadl
Summary: Desalination plants produce desalted water and highly saline water (brine discharge) as two primary streams. Disposing of brine into the sea or groundwater aquifers can harm the environment. To address this, the brine is used to generate energy and pre-heat for evaporation. The system also produces salt as a byproduct, contributing to environmental protection.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Juwel C. Mojumder, Saiied M. Aminossadati, Christopher R. Leonardi
Summary: This study investigates the use of thermal nanofluids in direct absorption solar collectors (DASC) using computational modelling. The study examines the effects of optical and thermal properties on thermal energy production. The results show that the exergy efficiency is lower when fully diffusive conditions are used at the semitransparent wall compared to fully specular conditions. The study also establishes a correlation between the hydraulic entrance length and Reynolds number.
Article
Chemistry, Multidisciplinary
Likhan Das, Fazlay Rubbi, Khairul Habib, Navid Aslfattahi, Saidur Rahman, Syed Mohd Yahya, Kumaran Kadirgama
Summary: Nanofluids have superior heat transfer characteristics in the field of solar energy conversion. This study used carbon-based diamond nanomaterial and Therminol(R)55 oil-based nanofluids in a CPV/T solar collector. The properties and performance of the nanofluids were evaluated through experimental characterization. The results showed that nanofluids can significantly enhance thermal conductivity and photo-thermal energy conversion efficiency.
Article
Chemistry, Physical
S. Bharath Subramaniam, Ramalingam Senthil
Summary: The experiment focused on a concentrated solar absorber with finned phase change materials, utilizing a Scheffler type parabolic dish concentrator. Integration of cylindrical PCM containers resulted in enhanced heat transfer augmentation and higher energy and exergy efficiency in the parabolic dish collector. The optimized solar absorber could be applied in various fields such as steam generation, biomass gasification, space heating, and hydrogen generation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.