Review
Green & Sustainable Science & Technology
Ashok Kumar Singh, Samsher
Summary: This paper reviews the performance of ETC assisted solar desalting units, especially emphasizing the advantages of thermosiphon ETC solar desalting units in addressing freshwater scarcity, and highlights their self-sustainability in remote areas.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Thermodynamics
Mohamed B. Farghaly, Raed Nayif Alahmadi, H. H. Sarhan, E. S. Abdelghany
Summary: This research aims to enhance the efficiency and freshwater productivity of solar still by modifying the design and coupling it with evacuated tube collectors and parabolic trough reflectors. The experimental results show that using both modifications simultaneously yields the highest efficiency and productivity.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Ahmed E. Abu El-Maaty, Mohamed M. Awad, Gamal I. Sultan, Ahmed M. Hamed
Summary: This study presents an experimental and theoretical investigation of a fog desalination system powered by an evacuated tube solar water heater. It was found that increasing water mass in the storage tank can improve system efficiency and reduce water temperature, leading to a recommendation to operate the system at inlet water temperature higher than 55 degrees C.
Article
Chemistry, Physical
Ayhan Atiz, Hatice Karakilcik, Mustafa Erden, Mehmet Karakilcik
Summary: The study investigates an integrated system for electricity and hydrogen production, with energy and exergy analyses. The system includes various solar collectors, flash turbine, organic Rankine cycles, reverse osmosis unit, water electrolysis unit, greenhouse, and medium temperature geothermal resource. By upgrading the fluid temperature from geothermal resources, clean water, hydrogen, and electrical energy are generated. The overall energy and exergy efficiencies of the system are found to be 10.43% and 9.35% respectively.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Shahin Shoeibi, Hadi Kargarsharifabad, Nader Rahbar, Gholamreza Khosravi, Mohsen Sharifpur
Summary: This study improved the performance of solar desalination by using an evacuated tube heat pipe solar collector and an external condenser. The results showed that the freshwater generation of the modified system was 2.13 times that of conventional systems, and the yield fraction of the external condenser was about 18.62% of the total water productivity. Additionally, the system contributed to significant carbon dioxide mitigation.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Energy & Fuels
Yougang Zhang, Runsheng Tang
Summary: This study compared the estimation of diffuse radiation collected by tilted evacuated solar tube collectors using 2-D and 3-D models, finding a high agreement between the results obtained from the two models with differences depending on the tilt angle of the solar tubes.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Multidisciplinary Sciences
Sorabh Aggarwal, Raj Kumar, Daeho Lee, Sushil Kumar, Tej Singh
Summary: With the increasing energy demand, efforts have been made to efficiently generate clean energy from non-conventional sources. Solar energy, particularly in heating applications, is widely used. Solar water heating systems (SWHS) have undergone developments to enhance their performance. Two types of SWHS, flat plate solar collectors (FPSCs) and evacuated tube solar collectors (ETSCs), have been compared in terms of efficiency. This review article focuses on techniques such as energy storage media, nanomaterials, reflecting surfaces, and hybrid methods used to enhance the performance of ETSCs.
Review
Thermodynamics
Arvind Kumar, Zafar Said, Evangelos Bellos
Summary: The evacuated tube solar collector is a suitable solar technology for producing useful heat in various climate conditions. Design parameters such as tracking system, collector design, mass flow rate, optical design, and working fluid play crucial roles in influencing the performance of the collector.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Energy & Fuels
Mert Cimen, Mehmet Colakoglu, Ali Gungor
Summary: The study aims to prevent overheating issues in glass evacuated tubes with heat pipes in solar water heaters by controlling the heat pipe fluid, while maintaining efficiency up to 80 degrees Celsius. By using ethanol as the heat pipe fluid, new designed glass evacuated tubes achieve a daily conversion efficiency of 77.5% up to a water temperature of 80 degrees Celsius in field tests, showing consistent experimental results.
Article
Engineering, Environmental
Huan Liu, Dongxu Ji, Meng An, A. W. Kandeal, Amrit Kumar Thakur, Mohamed R. Elkadeem, Almoataz M. Algazzar, Gamal B. Abdelaziz, Swellam W. Sharshir
Summary: In order to improve the thermo-economic performance of a pyramid solar still (PSS), the researchers integrated evacuated tubes and ultrasonic foggers into the device and added Co3O4 nanofluid. The results showed that incorporating all the proposed additives increased freshwater production, energy efficiency, and exergy efficiency by 83.87%, 18.29%, and 38.86% respectively. Additionally, the production cost per liter of freshwater was reduced by 11.61%.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Chemical
Muhammad Zakaria, Abbas M. Sharaky, Al-Sayed Al-Sherbini, Mohamed Bassyouni, Mashallah Rezakazemi, Yasser Elhenawy
Summary: The absorption efficiency of a solar collector was improved using different types of nanofluids. Experimental work investigated flat-plate and evacuated-tube collectors under outdoor conditions to produce distilled water. The evaporation efficiency of the flat-plate collector was improved up to 36% with the presence of ethylene glycol nanofluid at 80-100 degrees C.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Physics, Applied
Mark A. George, Noboru Takamure, David R. McKenzie
Summary: This study investigates the radiative heat transfer in the coaxial geometry of evacuated tube solar collectors through theoretical and experimental analysis. The results suggest that the effective emissivity method is applicable in certain conditions, but the spectral distribution of the emitted radiation needs to be considered at high temperatures.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Chemical
Hamid Moghadam, Mohsen Samimi
Summary: In this study, an evacuated tube collector was used as the basin of the solar still, and the effect of condenser geometry on distilled water production was investigated. The optimal conditions for maximum water production were determined, and the selected operating factors were found to significantly affect the volume of water produced by solar desalination.
Article
Green & Sustainable Science & Technology
Esteban Zalamea-Leon, Edgar A. Barragan-Escandon, John Calle-Siguencia, Mateo Astudillo-Flores, Diego Juela-Quintuna
Summary: This study compares the performance of evacuated tube and flat plate solar collectors under different orientations in a high-altitude equatorial location. The results demonstrate that evacuated tube collectors perform better in parallel arrangement, reducing the backup energy requirement.
Article
Thermodynamics
Koosha Ensafjoee, Roonak Daghigh
Summary: Liquid desiccant air conditioners (LDAC) are environmentally friendly and energy-efficient. A prototype of an internally heated bubble column regenerator has been constructed to address the corrosion issue and improve the overall performance. Experimental results indicate that the initial desiccant concentration has the highest impact on the device's performance, increasing air flow rate leads to higher water extraction, and air injection depth has no significant impact.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Francesco Calise, Francesco Liberato Cappiello, Armando Carteni, Massimo Dentice d'Accadia, Maria Vicidomini
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2019)
Article
Energy & Fuels
Francesco Calise, Francesco Liberato Cappiello, Raffaele Vanoli, Maria Vicidomini
Article
Energy & Fuels
Ighball Baniasad Askari, Francesco Calise, Maria Vicidomini
Article
Thermodynamics
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice d'Accadia, Maria Vicidomini
Article
Energy & Fuels
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice d'Accadia, Maria Vicidomini
Article
Energy & Fuels
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice d'Accadia, Alessandra Infante, Maria Vicidomini
Article
Energy & Fuels
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice d'Accadia, Luigi Libertini, Maria Vicidomini
Article
Energy & Fuels
Francesco Calise, Ursula Eicker, Juergen Schumacher, Maria Vicidomini
Review
Energy & Fuels
Wenxiao Chu, Francesco Calise, Neven Duic, Poul Alberg Ostergaard, Maria Vicidomini, Qiuwang Wang
Article
Thermodynamics
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice D'Accadia, Maria Vicidomini
Article
Thermodynamics
Francesco Calise, Francesco Liberato Cappiello, Maria Vicidomini, Fontina Petrakopoulou-Robinson
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Thermodynamics
Giovanni Barone, Annamaria Buonomano, Cesare Forzano, Adolfo Palombo, Maria Vicidomini
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Thermodynamics
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice D'Accadia, Maria Vicidomini
ENERGY CONVERSION AND MANAGEMENT
(2020)
Review
Energy & Fuels
Krzysztof Sornek, Karolina Papis-Fraczek, Francesco Calise, Francesco Liberato Cappiello, Maria Vicidomini
Summary: Nowadays, a significant portion of energy consumption is used in buildings, with heating/cooling systems, lighting, and other appliances being the main contributors. Renewable energy solutions, such as active and passive solar installations, are being promoted to improve energy efficiency. This paper reviews research on Trombe walls, including their different variations and their potential to reduce energy consumption and enhance thermal comfort. The findings suggest that the application of thermal storage walls can lead to lower emissions of greenhouse gases and improved living standards, but further feasibility studies are needed.
Article
Green & Sustainable Science & Technology
Francesco Calise, Francesco Liberato Cappiello, Massimo Dentice D'Accadia, Maria Vicidomini
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.