Article
Multidisciplinary Sciences
Andres Calcabrini, Mirco Muttillo, Miro Zeman, Patrizio Manganiello, Olindo Isabella
Summary: Reconfigurable photovoltaic modules are a promising approach to improve the energy yield of partially shaded systems. This study presents outdoor test results of a full-scale prototype, showing that the reconfigurable module outperforms the reference module by producing over 10% more energy. A modification in the reconfiguration algorithm is proposed to reduce losses and simplify the design.
NATURE COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Yuanzhi Gao, Changling Wang, Dongxu Wu, Zhaofeng Dai, Bo Chen, Xiaosong Zhang
Summary: The study investigates the impact of operating temperature on the working performance of a novel bifacial concentrated photovoltaic-solar thermoelectric generator (PV-STEG) system, and selects a mini channel heat sink with superior heat transfer characteristics to lower the PV cell temperature. A three-dimensional numerical model is developed and compared with a conventional PV system. The study finds that the square mini-channel heat sink is more suitable and recommends maximizing power yield through stronger solar irradiance, higher Reynolds number, and lower inlet temperature. The use of nanofluids significantly reduces/improves PV temperature and power output, with a 14.59% increase in total efficiency and a 23.21% enhancement in exergy efficiency compared to the PV alone.
Article
Thermodynamics
Shangling Chu, Heng Zhang, Haiping Chen
Summary: This study proposes a micro-gas turbine (MGT) combined cooling, heating, and power system with low concentrating photovoltaic/thermal-heat pump (LCPV/T-HP) and an absorption chiller. The performance of the system under different operation strategies is analyzed using TRNSYS software from various perspectives. The results show that high-temperature water source heat pump (HWHP) and low-temperature water source heat pump (LWHP) achieve better coefficient of performance (COP) in the electric load mode. The system's exergy and energy efficiency are higher in the following electric load mode, and the equipment with higher exergy loss includes LCPV/T, gas-fired boiler, absorption refrigeration unit, MGT, and hot water generator.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Energy & Fuels
Malte Ruben Vogt, Giorgos Pilis, Miro Zeman, Rudi Santbergen, Olindo Isabella
Summary: The IEC 61853 standard series does not include bifacial PV modules, but their market share has significantly increased and is projected to grow. This work demonstrates how the standard can be extended to include the energy rating of bifacial modules, and provides a tested procedure for calculating rear irradiance and bifacial energy yield.
PROGRESS IN PHOTOVOLTAICS
(2023)
Article
Multidisciplinary Sciences
Joji Johnson, S. Manikandan
Summary: The study shows that promoting bifacial photovoltaic in the Indian market can accelerate its growth and support the achievement of sustainable development goals. Optimized resource potential maps of bifacial PV have been developed, and the impact of ground albedo and installation height has been studied. It is found that the annual and seasonal power output of bifacial PV is higher than monofacial PV at any location in India.
Article
Green & Sustainable Science & Technology
Markus Zauner, Wolfgang Muehleisen, Dominik Holzmann, Marcus Baumgart, Gernot Oreski, Sonja Feldbacher, Markus Feichtner, Wolfgang Nemitz, Claude Leiner, Christian Sommer, Frank Reil
Summary: The idea of light deflection was proposed to improve the efficiency of bifacial photovoltaic modules, where unused light is redirected to solar cells for additional current generation. However, the measured results fell short of the simulated expected gain of up to 11%, achieving only about 3%.
Article
Energy & Fuels
Hesan Ziar, Bjorn Prudon, Fen-Yu (Vicky) Lin, Bart Roeffen, Dennis Heijkoop, Tim Stark, Sven Teurlincx, Lisette de Senerpont Domis, Elias Garcia Goma, Julen Garro Extebarria, Ignacio Narvaez Alavez, Daniel van Tilborg, Hein van Laar, Rudi Santbergen, Olindo Isabella
Summary: The study introduces innovative concepts for floating bifacial PV systems and highlights the impact of partially soaking PV modules in water. Birds presence has a severe effect on floating PV system performance in the short term, and low albedo inland water areas require bifacial PV systems to have reflectors for optimal energy production.
PROGRESS IN PHOTOVOLTAICS
(2021)
Article
Green & Sustainable Science & Technology
Andres Calcabrini, Mirco Muttillo, Raoul Weegink, Patrizio Manganiello, Miro Zeman, Olindo Isabella
Summary: This article introduces a PV module that can dynamically reconfigure interconnections between its solar cells to minimize power losses, and experimentally validates its energy generation efficiency under varying illumination conditions.
Article
Green & Sustainable Science & Technology
Emad M. M. Ahmed, Mokhtar Aly, Manar Mostafa, Hegazy Rezk, Hammad Alnuman, Waleed Alhosaini
Summary: Recently, there has been increasing concerns over the nonlinearity of bifacial PV (BPV) modules compared to conventional monofacial PV (MPV) modules. This paper proposes a new model for BPV modules based on MPV modeling, which includes a new parameter to adjust the value of the model series resistance and optimize BPV module parameters using the LSHADE method. The proposed model shows superior performance and accuracy over existing methods in the literature, providing an accurate model for the whole operating range of BPV modules.
Article
Energy & Fuels
Mohammadreza Aghaei, Rosie Pelosi, Wallace W. H. Wong, Timothy Schmidt, Michael G. Debije, Angele H. M. E. Reinders
Summary: The optical and electrical performances of visually attractive mosaic cubical luminescent solar concentrator photovoltaic (LSC PV) devices have been measured in various configurations consisting of four cubical lightguides with edge- and bottom-mounted silicon solar cells. In total, 19 different configurations of mosaic LSC PV devices have been experimentally evaluated in this study.
PROGRESS IN PHOTOVOLTAICS
(2022)
Article
Energy & Fuels
J. Eguren, F. Martinez-Moreno, P. Merodio, E. Lorenzo
Summary: This study describes the production and commercialization of bifacial PV modules, and presents the results of an outdoor test on 59 modules recovered from real installations after 20 years. The study confirms that these modules continue to perform well after cleaning and testing.
Article
Energy & Fuels
Wenbo Gu, Xiaojian Wang, Hao Lu, Meiheriayi Mutailipu
Summary: This study proposes a novel hybrid bifacial photovoltaic-thermal (bPV/T) system that can generate more power and heat by effectively absorbing sunlight from both sides simultaneously. The integrated mathematical model of the hybrid system is developed by coupling optical, electrical, and thermal models, and the characteristics of the entire system are simulated. The results show that the bPV/T system achieves a high overall energy efficiency of 85.74% due to high transmissivity and good insulation, but the overall exergy efficiency is only 12.26% due to low-grade heat generation.
Article
Energy & Fuels
M. Tahir Patel, M. Sojib Ahmed, Hassan Imran, Nauman Z. Butt, M. Ryyan Khan, Muhammad A. Alam
Summary: The study shows that tracking the sun for bifacial photovoltaic systems can significantly improve energy gain, especially for fixed-tilt bifacial PV installations near the equator. However, the advantages of bifacial tracking systems are not as obvious when compared to monofacial tracking systems which already offer many benefits.
Article
Energy & Fuels
Gaetano Mannino, Giuseppe Marco Tina, Mario Cacciato, Lorenzo Todaro, Fabrizio Bizzarri, Andrea Canino
Summary: The need to combat global warming by replacing fossil energy sources with renewable energy sources has contributed to the growth and development of various technologies, including photovoltaics. The PV technology is constantly evolving to improve the efficiency and durability of PV modules. Bifacial PV modules are gaining a larger market share due to their higher energy and power density at a similar price to conventional PV modules.
Article
Construction & Building Technology
Oufan Zhao, Wei Zhang, Mo Chen, Lingzhi Xie, Jianhui Li, Zihao Li, Jianmei Zhong, Xin Wu
Summary: This study innovatively combines bifacial PV module with building exterior wall to form the BI-PVW system, which can enhance power generation and reduce building energy consumption. The comprehensive utilization efficiency of solar energy reaches 40% in sunny days.
SUSTAINABLE CITIES AND SOCIETY
(2022)
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.