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)
Article
Energy & Fuels
Ting Yang, Pan Zhang, Jian Zhang, Hao Ji, Wei Li
Summary: This paper proposes a novel coordination control method for an integrated solar combined cycle thermoelectric coupling system. The system's dynamic performance and robustness are improved by introducing an inertial power compensation scheme to address the mismatch in energy response speed. Furthermore, the control precision of the controller is enhanced through the use of an intelligent optimization algorithm.
Article
Chemistry, Physical
Dmitry Pashchenko
Summary: The paper examines an integrated solar combined cycle system (ISCCS) utilizing solar energy for steam methane reforming and compares its overall efficiency with that of a system utilizing solar energy for steam generation in a steam turbine cycle. Utilizing solar energy for steam methane reforming increases the overall efficiency by 3.5%. If water used for steam methane reforming is condensed from the exhaust gases, the overall efficiency of ISCCS increases by 6.2% to 8.9% compared to the system where solar energy is used for steam generation in a steam turbine cycle. Sankey diagrams based on the energy balance were compiled. Utilizing solar energy for steam methane reforming increases the power share of a gas turbine cycle, with two-thirds in the gas turbine cycle and one-third in the steam turbine cycle.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Francesco Rovense, Miguel Angel Reyes-Belmonte, Manuel Romero, Jose Gonzalez-Aguilar
Summary: This study analyzes a 150 MW, multi-tower solar-only combined cycle power plant using olivine particles as heat transfer fluid and thermal energy storage medium. Unitary 53.0 MWth solar tower was designed to meet technical constraints. Thermo-economic optimization determined optimal layouts and storage capacities.
Article
Energy & Fuels
Aaron T. Bame, Joseph Furner, Ian Hoag, Kasra Mohammadi, Kody Powell, Brian D. Iverson
Summary: This study presents a process to determine the optimal configuration of a solar-coal power plant and demonstrates it on a coal power plant in the US. The study finds that a solar augmentation above 3% of boiler heating is required for the hybrid design to be thermodynamically feasible. The optimal configuration includes the use of parabolic trough collector technology with a solar augmentation of over 9%, bypassing feedwater heater 6.
Article
Thermodynamics
Jessica Settino, Vittorio Ferraro, Pietropaolo Morrone
Summary: The paper investigates the integration of solar energy into a traditional natural gas-fired combined cycle power plant and evaluates the impact of intercooling on energy efficiency and CO2 emissions. Solar energy is integrated through parabolic trough collectors to preheat the air leaving the compressor. The study compares two additional configurations and performs a thermodynamic analysis of the plant, developing a numerical model to simulate the solar field. The selected configuration achieves a solar conversion efficiency of 33% and a net electric efficiency of 69.5%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Rongtang Liu, Miaomiao Liu, Can Xu, Ming Liu, Weixing Yuan
Summary: Traditional combined heat and power systems are limited by their heating-controlled operation mode, leading to low efficiency and flexibility. In this study, a novel combined heat and power system integrated with solar energy is proposed, which greatly improves the energy utilization and flexibility. Detailed analytical models and evaluations show that the average net energy efficiency of the novel system can reach 54.68% during daytime and 55.75% during nighttime, while the average net exergy efficiency can reach 38.73% and 38.83%, respectively. The peak-shaving ability is significantly improved, and standard coal consumption is reduced by 295.35 tons per day compared to traditional systems. This study provides a promising approach for enhancing the efficiency and flexibility of combined heat and power plants using solar energy.
APPLIED THERMAL ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Tingyu Xiao, Chao Liu, Xurong Wang, Shukun Wang, Xiaoxiao Xu, Qibin Li, Xiaoxiao Li
Summary: This study examines the environmental sustainability of a solar-driven sCO(2) power generation system using detailed life cycle assessment. The results show that auxiliary electricity consumption, thermal energy storage, and solar field manufacture have the greatest impact on the overall environmental performance of the system. The recompression layout shows better environmental performance compared to the simple recuperative layout.
Article
Green & Sustainable Science & Technology
MohammadAmin Javadi, Niloofar Jafari Najafi, Mani Khalili Abhari, Roohollah Jabery, Hamidreza Pourtaba
Summary: The research studied the Abadan Combined cycle power plant in Iran from the perspectives of Energy, Exergy, Economic and Environmental, proposing three different configurations integrating a solar power tower system. Results showed that the first configuration had the lowest initial cost and reduced emissions by 8041 tonnes/year, the second configuration had the highest energy and exergy efficiency saving $11 million in annual fuel consumption and preventing 34563tonnes/year of emissions, while the third configuration had the highest power generation of 370.4 MW.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Engineering, Mechanical
Yunis Khan, Radhey Shyam Mishra, Abhendra Pratap Singh
Summary: In this study, two configurations of combined intercooled cascade supercritical carbon dioxide (sCO(2)) cycle/organic Rankine cycle (ORC) and the combined intercooled cascade sCO(2) cycle/parallel double evaporator ORC (PDORC) were compared in terms of their thermodynamic performance. Solar power tower (SPT) was used as the heat source for both configurations. The addition of basic ORC and PDORC to the standalone intercooled cascade sCO(2) cycle increased the thermal efficiency by 2.26% and 6.66% respectively. Configuration-2, which included PDORC, outperformed configuration-1 in terms of waste heat recovery, with an optimized thermal efficiency of 52.34%. An exergoenvironmental analysis was also conducted, showing a decrease in exergoenvironmental impact index and an increase in exergetic stability factor with increasing direct normal irradiation (DNI).
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Shiyi Chen, Yilin Zheng, Mudi Wu, Jun Hu, Wenguo Xiang
Summary: The supercritical CO2 (sCO(2)) Brayton cycle is efficient and compact, expected to replace the steam Rankine cycle in various applications. Integrating sCO(2) cycle with single-stage reheating and recompression with pulverized coal oxy-fuel combustion process has been shown to increase total efficiency, with wet mode showing higher efficiency under basic sCO(2) cycle conditions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Thermodynamics
Pietropaolo Morrone, Mario Amelio, Angelo Algieri, Diego Perrone
Summary: The aim of the research was to evaluate the energy performance of different combined cycle configurations fueled by natural gas and lignocellulosic biomass. Based on the results, the BIFRCC system was found to be the most suitable option with high biomass efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Yaman Mohammad Ali Manaserh, Ahmad M. Abubaker, Adnan Darwish Ahmad, Ammar Bany Ata, Yousef S. H. Najjar, Nelson K. Akafuah
Summary: This study demonstrates that integrating a proposed solar power and thermal energy storage system with a conventional powerplant can significantly improve power output, efficiency, and reduce specific fuel consumption. By utilizing solar and storage systems, it is possible to meet future load demand and achieve a relatively short return of investment period.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Thermodynamics
Jiangjiang Wang, Zepeng Han, Yi Liu, Xutao Zhang, Zhiheng Cui
Summary: This study proposes a system that integrates multiple solar energy technologies to improve energy utilization efficiency, and conducts thermodynamic performance analysis in cooling and heating modes. The results show that the system's performance varies under different solar irradiation and power load ratios. Compared to traditional systems, the proposed system shows better performance in energy savings and carbon dioxide emissions reduction.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Green & Sustainable Science & Technology
Vinay Kumar Yadav, Jahar Sarkar, Pradyumna Ghosh
Summary: The study investigates an improved design of a solar-driven combined cooling and power system based on various perspectives. It compares the performance of this system with an individual cooling and power system. The results show that the novel cycle has higher performance index and overall exergy efficiency, lower total cost, and lower CO2 emission compared to the individual system. The study also finds that the performance is influenced by operating temperatures, component efficiencies, seasonal climate change, and cooling-to-power ratio.
JOURNAL OF CLEANER PRODUCTION
(2023)
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.