Article
Optics
Hua Shen, Yue Sun
Summary: The study introduces a new tilted-wave point diffraction interferometer (TPDI) for measuring complex surfaces, combining the advantages of tilted-wave interferometry and point diffraction interferometry for high-precision measurements. By using a fiber array to generate diffractive tilted waves to compensate for the local gradient of the test specimen, the system requires better quality for both on-axis and off-axis diffractive waves compared to traditional methods.
OPTICAL ENGINEERING
(2021)
Article
Environmental Sciences
S. Nabi Mughal, Y. R. Sood, R. K. Jarial
Summary: In this research, a hybrid model combining nonlinear autoregressive neural networks and empirical models is used to predict global solar radiations on tilted surfaces. The proposed model shows an average 9% increase in global solar radiation reception on tilted surfaces compared to horizontal surfaces. A comparison with other empirical models also indicates that the proposed hybrid model has less error in estimating global solar radiations.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Mst Nishat Yasmin Koli, Muhammad U. Afzal, Karu P. Esselle
Summary: This article presents a new type of tilted circularly polarized radial line slot array antennas, which achieve higher gain and aperture efficiency by aggressively truncating the slot layout and introducing a reflecting wall. The measured results of a prototype antenna confirmed the improved performance.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2022)
Article
Environmental Sciences
Qi Zeng, Jie Cheng, Mengfei Guo
Summary: This study comprehensively evaluates the accuracy of mainstream surface longwave (LW) radiation products (GLASS, CERES SYN and ERA5) in terms of surface longwave upward radiation (SLUR) and surface longwave downward radiation (SLDR). The GLASS product shows the best accuracy under clear-sky conditions, while ERA5 has the best overall accuracy. The global annual mean values of SLUR and SLDR are quantified, along with their temporal variations from 2003 to 2020. This evaluation and trend analysis contribute to understanding global energy balance and climate change.
Article
Geography, Physical
Qi Zeng, Jie Cheng
Summary: This study utilizes time extension methods to estimate high-spatial resolution surface daily longwave radiation, with the linear sine interpolation method showing the best performance. Adjusting the day length improves the accuracy of daily longwave radiation estimations.
INTERNATIONAL JOURNAL OF DIGITAL EARTH
(2021)
Article
Green & Sustainable Science & Technology
Mohsen RahimiLarki, Reza Hosseini Abardeh, Hassan Rahimzadeh, Hamid Sarlak
Summary: The research investigates the performance of the tilted solar chimney system in the presence of ambient crosswinds, revealing that crosswinds have a negative impact on power performance at lower speeds. The study also shows that a tilted solar chimney with angles between 10 degrees to 20 degrees outperforms a fixed chimney arrangement in windy conditions. Dimensional analysis predicts a power increase of 5% to 20% at a 15-degree chimney tilt angle compared to a vertical chimney at the same crosswind speeds.
Article
Engineering, Electrical & Electronic
Xiaobin Xue, Xile Han, Linhao Li, Li Min, Daotong You, Tuan Guo
Summary: Respiration rate and volume are important physiological indicators of human health, which can reflect cardiovascular health status and cardiopulmonary function. In this study, a compact breath monitoring system based on a wearable tilted fiber Bragg grating (TFBG) curvature sensor is demonstrated. The TFBGs provide highly sensitive, real-time response to curvature changes during respiration, assisted by a custom designed breathing tube. The proposed miniaturized and cost-effective sensing system consists of a tunable laser module, a field programmable gate array acquisition control circuit module, and a sensor module, and different breathing patterns can be successfully identified from the output of the sensor.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Energy & Fuels
Faris Alqurashi, Rached Nciri, Abdulrahman Alghamdi, Chaouki Ali, Faouzi Nasri
Summary: This study proposes a novel design called poly-tilted segmented panel (PTSP) to control the solar radiation reception rate. By adjusting the amount of received solar energy, the sustainability of cities and villages in extremely sunny regions can be promoted. The proposed design offers a cheap, simple, and effective alternative to conventional sun tracking systems.
Article
Multidisciplinary Sciences
Anthony Umunnakwe Obiwulu, Nald Erusiafe, Muteeu Abayomi Olopade, Samuel Chukwujindu Nwokolo
Summary: This research applied measured and theoretically derived models to estimate the optimal tilt angle, maximum incident solar radiation, and global radiation index in Lagos and 37 metropolitan cities in Nigeria. The results showed that the south-facing tilted module at a 16.8-degree angle performed the best in terms of maximum output power. Additionally, the analysis of the GRI values of the different modules revealed that model 14 had higher accuracy in estimating the optimal tilt angle.
Article
Physics, Condensed Matter
J. Wu, C. M. Wang
Summary: This study systematically investigates the anisotropic magneto-conductivity and planar Hall effect in tilted magnetic topological semimetals by considering the vertex correction of velocity in the Kubo formula. It finds that the nonzero anisotropic magneto-conductivity is due to intrinsic magnetization by magnetic doping and band structure tilt, rather than an external magnetic field. The planar Hall conductivity is always zero for tilt along both x and y directions.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Environmental Sciences
J-L F. Li, Kuan-Man Xu, Wei-Liang Lee, J. H. Jiang, Eric Fetzer, Jia-Yuh Yu, Yi-Hui Wang, Graeme Stephens, Li-Chaio Wang
Summary: The land skin temperature (Ts) is directly influenced by surface energy balance, particularly radiative energy, and can be linked to model representation of hydrometeors in the atmosphere. The differences between simulations with and without radiative effects of falling ice hydrometeors are more pronounced in surface energy fluxes and temperature changes across different latitudinal zones. Temporal correlation analysis shows that the relationship between Ts and falling ice hydrometeor changes is stronger at high latitudes but weakened by shortwave changes at low latitudes.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Green & Sustainable Science & Technology
Miguel C. Brito, Rodrigo Amaro e Silva, Ahmed M. Elsayed, Mario Po
Summary: The multi-directional pyranometer array estimates the global irradiance on a tilted plane and the direct irradiance by measuring the global irradiance on a set of stationary surfaces with different inclinations and orientations simultaneously. It provides 50% more accurate estimates of global irradiance on a tilted plane compared to transposing measured global and diffuse irradiance. A simplified layout with five sensors yields comparable results.
JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
(2022)
Article
Engineering, Mechanical
Narendra Kumar, Satish C. Sharma
Summary: This study analyzed the influence of the tilt effect on the performance of annular pocketed hybrid/hydrostatic thrust pad bearings compensated with orifice restrictors, and studied the impact of geometric shapes on their performance. The results showed that the tilt effect reduces the fluid film reaction, but enhances the bearing fluid film stiffness and damping coefficients.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Bowen Shi, Xiaokai Mu, Huan Zhan, Linhui Deng, Tao Li, Hongchao Zhang
Summary: This study investigates the influence of substrate tilt angle on the crack behavior of high hardness Ni60A coating in laser cladding. The cracking rate of the coating increases with increasing substrate tilt angle, but the tilt angle does not significantly affect the crack mechanism. Different lap directions have an impact on crack behavior, and coatings prepared by downward lap cladding have a higher cracking rate due to greater laser energy loss. The increasing substrate tilt angle leads to increased residual stress and decreased fracture strength, resulting in a higher cracking rate of the Ni60A coating.
Article
Materials Science, Multidisciplinary
Viktor Koenye, Lotte Mertens, Corentin Morice, Dmitry Chernyavsky, Ali G. Moghaddam, Jasper van Wezel, Jeroen van den Brink
Summary: We demonstrate that tilted Weyl semimetals with spatially varying tilt can be used to study anisotropic optics and curved spacetime. By examining specific tilting configurations, we numerically analyze the time evolution of electronic wave packets and current densities. Our results show that electron trajectories in such systems can be determined using Fermat's principle with an inhomogeneous, anisotropic effective refractive index. Additionally, we show that these systems can simulate gravitational lensing around a synthetic black hole, revealing gravitational features.
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.