Article
Construction & Building Technology
Yanyi Sun, Robin Wilson, Hao Liu, Yupeng Wu
Summary: Smart window designs incorporating thermotropic and Transparent Insulation Material (TIM) can improve building energy efficiency and achieve homogeneous daylight distribution. The geometric configurations and thermotropic features play a significant role in energy and daylight performance.
BUILDING AND ENVIRONMENT
(2021)
Article
Materials Science, Multidisciplinary
Stephen M. Meckler, Gabriel Iftime, Asritha Nallapaneni, Quentin Van Overmeere, Barkev Keoshkerian, Eli Bulger, Alec S. Ho, Chenhui Zhu, Jessy B. Rivest, Mahati Chintapalli
Summary: We have developed a class of porous polymer monoliths with high visible light transmittance and low haze using controlled radical polymerization. These materials have potential applications in thermally insulated windows.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Engineering, Marine
R. Sreedevi, S. Nallayarasu
Summary: In this study, the forces generated when ships pass close to each other were investigated using CFD software. Parametric studies were conducted, and empirical equations for calculating these forces were derived by comparing the results with experimental data.
Article
Polymer Science
Baolu Shi, Long Xie, Bin Ma, Zhiliang Zhou, Baosheng Xu, Lijie Qu
Summary: SiO2 aerogels with unique structural characteristics and good optical transparency have the potential to be used in aerogel glass for thermal insulation.
Article
Engineering, Aerospace
Daniele Bianchi, Mario Tindaro Migliorino, Marco Rotondi, Landon Kamps, Harunori Nagata
Summary: Nozzle throat erosion is a critical issue in hybrid rocket engines, with accurate understanding and modeling essential for performance prediction. Research shows that erosion rate and wall temperature vary with operating conditions, and combustion efficiency can also have an impact on erosion rate.
JOURNAL OF PROPULSION AND POWER
(2022)
Article
Thermodynamics
Sheng-Wei Chang, Ali Sadeghianjahromi, Wen-Jenn Sheu, Chi-Chuan Wang
Summary: 3D numerical simulations were conducted to investigate the thermofluids characteristics of oblique fin heat sinks under natural convection. The study identified critical parameters affecting performance, proposed an optimum heat sink configuration, and introduced a novel symmetrical oblique fin design. Experimental verification confirmed that the proposed oblique fin heat sink offers over 3°C reduction in maximum temperature compared to continuous fin heat sinks.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Construction & Building Technology
Qing Zheng, Ying Ke, Hongbo Wang
Summary: This study comprehensively investigated the design factors of liquid circulating garments (LCG) and found that clothing insulation, pipe length, and cooling mode significantly impact heat stress alleviation, offering helpful guidelines for better thermal comfort and energy-saving strategies in hot environments.
ENERGY AND BUILDINGS
(2022)
Article
Acoustics
C. Churchill, T. Bednar, H. Muellner, M. Neusser, S. Hinterseer
Summary: Thermal cladding systems have evolved and may no longer rely on the original prediction models, signaling a need for improvement. Parameter studies have shown that behavior of thermal cladding systems can be predicted at high frequencies, but there are still inaccuracies in the predictions.
Article
Energy & Fuels
Yanyi Sun, Xin Liu, Yang Ming, Xiao Liu, Daniel Mahon, Robin Wilson, Hao Liu, Philip Eames, Yupeng Wu
Summary: This research introduces a novel multi-effect smart window system that integrates a thermotropic material with a transparent insulation material to enhance energy efficiency and improve indoor luminous environment. The simulation results show that installing this window system can yield significant energy savings and increase daylight availability under different climate conditions. Future research can focus on material design and development to further enhance energy efficiency and solar and daylight control.
Article
Construction & Building Technology
Xuchao Wang, Ling Zhang, Xiaosong Su, Huixian Yang
Summary: The study evaluates the daylighting and energy performance of a window with transparent insulation slats (WTIS) compared with other commonly used windows. The results show that WTIS has better daylighting performance than other windows when the window-to-wall ratio is larger than 40% in the south orientation. The study provides valuable information for architects and engineers in designing energy-efficient buildings.
ENERGY AND BUILDINGS
(2023)
Article
Polymer Science
Conal Thie, Sean Quallen, Ahmed Ibrahim, Tao Xing, Brian Johnson
Summary: Energy consumption in buildings is expected to increase, and one potential way to reduce it is by using silica aerogels as a thermal insulator. To study their benefits, simulations were performed on a model of a residential house using ANSYS FLUENT 2019 R2. The results showed that using aerogels in walls and windows could lead to significant energy savings.
Article
Thermodynamics
Ramin Alipour, Roozbeh Alipour, Farhad Fardian, Mohammad Hossein Tahan
Summary: The geometry of hydrokinetic tidal current turbine is crucial for its performance. This study investigates the effect of curvature, thickness, and blade pitch angle on turbine performance, considering the probability of fatigue loading. Different airfoils with acceptable lift to drag ratios were used to design turbine blades, and computational fluid dynamics was employed to simulate turbine performance under various conditions. An experimental setup was also used to validate the computational results. Results indicate that increasing thickness at higher blade pitch angle values enhances the maximum torque, while increasing the tip speed ratio improves the maximum power coefficient. The parameter SCPmax is introduced to assess the usefulness of each airfoil based on various factors and demonstrate the utility of maximum performance against fatigue hazard.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Evdoxia Paroutoglou, Peter Fojan, Leonid Gurevich, Simon Furbo, Jianhua Fan, Marc Medrano, Alireza Afshari
Summary: Latent heat thermal energy storage with Phase Change Materials (PCM) is a promising option for Thermal Energy Storage (TES) applications. This study developed a tubular encapsulation model and conducted a parametric analysis to optimize the system geometry and investigate the influence of internal and external fins on thermal conductivity. The results also showed that using PCM organic paraffin RT18 encapsulated in electrospun fiber matrices enabled rapid phase change processes.
Article
Thermodynamics
D. Bayer-Buhr, M. Vimal, A. Prakash, U. Gross, T. Fieback
Summary: The thermal accommodation coefficient alpha is assumed to be near unity for most gases, but this study shows its contribution to the effective thermal conductivity of highly porous insulation materials. The study investigates the influence of parameters like temperature, roughness, and contamination on alpha for Ar, N-2, He, and validates the assumptions used for calculations. The results also show the effects of physical adsorption and provide insights into the equivalence of alpha for SiO2 and CaSiO3.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Physical
Yunfei Yan, Chenghua Zhang, Gange Wu, Shuai Feng, Zhongqing Yang
Summary: This paper investigates the temperature distribution and exhaust species in a heat-recirculating micro-combustor embedded with porous media. The results indicate that embedding porous media improves temperature uniformity and preheating capacity. SiC material performs better in thermal stability and heat recirculating than Al(2)O(3) and ZrO2. The optimal equivalence ratio for methane/air combustion is in the range of 0.1-0.5, enabling super-enthalpy combustion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Thermodynamics
Souha Ferchichi, Hamdi Kessentini, Sergio Morales-Ruiz, Joaquim Rigola, Chiheb Bouden, Assensi Oliva
ENERGY CONVERSION AND MANAGEMENT
(2019)
Article
Computer Science, Interdisciplinary Applications
N. Valle, F. X. Trias, J. Castro
JOURNAL OF COMPUTATIONAL PHYSICS
(2020)
Article
Economics
Asma Dhakouani, Essia Znouda, Chiheb Bouden
Article
Construction & Building Technology
N. Morozova, F. X. Trias, R. Capdevila, C. D. Perez-Segarra, A. Oliva
BUILDING AND ENVIRONMENT
(2020)
Article
Energy & Fuels
Meril Tamm, Jordi Macia Cid, Roser Capdevila Paramio, Joan Farnos Baulenas, Martin Thalfeldt, Jarek Kurnitski
Article
Thermodynamics
J. Castro, J. Farnos, G. Papakokkinos, J. Zheng, C. Oliet
INTERNATIONAL JOURNAL OF REFRIGERATION
(2020)
Article
Green & Sustainable Science & Technology
Israel Herrera, Irene Rodriguez-Serrano, Yolanda Lechon, Armando Oliveira, Dirk Krueger, Chiheb Bouden
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2020)
Article
Thermodynamics
J. Zheng, J. Castro, A. Oliva, C. Oliet
Summary: An evaluation of an air-cooled, single effect solar-driven absorption system using LiBr-H2O and Carrol-H2O as working pairs for absorption chiller and heat pump applications shows that the Carrol system has higher performance and lower crystallization risk in both applications compared to the LiBr system.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2021)
Article
Thermodynamics
Giorgos Papakokkinos, Jesus Castro, Carles Oliet, Assensi Oliva
Summary: This study investigates the hexagonal honeycomb adsorption reactor design in adsorption cooling technology, examining the effects of various geometric and operational parameters on Specific Cooling Power (SCP) and Coefficient of Performance (COP). The results indicate that factors such as cell inradius, height, and fin thickness have a significant impact on system performance.
APPLIED THERMAL ENGINEERING
(2022)
Article
Computer Science, Interdisciplinary Applications
Nicolas Valle, Xavier Alvarez-Farre, Andrey Gorobets, Jesus Castro, Assensi Oliva, F. Xavier Trias
Summary: Flux limiters are widely used in scientific computing to capture shock discontinuities and are crucial for the temporal integration of high-speed aerodynamics, multiphase flows, and hyperbolic equations. However, the emergence of new computing architectures and hybrid supercomputer systems present a challenge for portability, especially for legacy codes that need to adapt their kernels to complex parallel programming paradigms. This study proposes a new formulation of flux limiters based on algebraic data structures and kernels, which simplifies their deployment on state-of-the-art supercomputers by reducing the number of computing kernels. The proposed formulation demonstrates its effectiveness in massively parallel computing systems and is applied to a canonical advection problem.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Thermodynamics
J. Zheng, J. Castro, E. Garcia-Rivera, C. Oliet, A. Oliva
Summary: Wettability is a critical property of falling film type absorbers. This study focuses on the relationship between surface tension and minimum wetting rate, as well as the influence of different working fluids on surface tension and minimum wetting rate.
INTERNATIONAL JOURNAL OF REFRIGERATION
(2022)
Article
Energy & Fuels
D. Kizildag, J. Castro, H. Kessentini, E. Schillaci, J. Rigola
Summary: This study presents prototypes of highly efficient flat plate solar thermal collectors based on transparent insulation materials (TIM) technology, along with an overheating protection system. The collectors were numerically designed and optimized using a simulation tool, and were tested under laboratory and actual meteorological conditions.
Meeting Abstract
Oncology
M. Vazquez Varela, M. Altabas Gonzalez, A. Giraldo Marin, V. Reyes Lopez, X. Maldonado Pijoan, B. Navalpotro Yague, M. Ramos Albiac, R. Verges Capdevila, S. Benavente Norza, S. Mico Milla, R. Granado Carrasco, J. Giralt Lopez de Sagredo
RADIOTHERAPY AND ONCOLOGY
(2020)
Meeting Abstract
Oncology
A. A. A. Geng Cahuayme, R. Verges Capdevila, J. Giralt Lopez de Sagredo, V. Reyes Lopez
RADIOTHERAPY AND ONCOLOGY
(2020)
Article
Energy & Fuels
Siddharth Sradhasagar, Omkar Subhasish Khuntia, Srikanta Biswal, Sougat Purohit, Amritendu Roy
Summary: In this study, machine learning models were developed to predict the bandgap and its character of double perovskite materials, with LGBMRegressor and XGBClassifier models identified as the best predictors. These models were further employed to predict the bandgap of novel bismuth-based transition metal oxide double perovskites, showing high accuracy, especially in the range of 1.2-1.8 eV.
Article
Energy & Fuels
Wei Shuai, Haoran Xu, Baoyang Luo, Yihui Huang, Dong Chen, Peiwang Zhu, Gang Xiao
Summary: In this study, a hybrid model based on numerical simulation and deep learning is proposed for the optimization and operation of solar receivers. By applying the model to different application scenarios and considering multiple performance objectives, small errors are achieved and optimal structure parameters and heliostat scales are identified. This approach is not only applicable to gas turbines but also heating systems.
Article
Energy & Fuels
Mubashar Ali, Zunaira Bibi, M. W. Younis, Muhammad Mubashir, Muqaddas Iqbal, Muhammad Usman Ali, Muhammad Asif Iqbal
Summary: This study investigates the structural, mechanical, and optoelectronic properties of the BaCuF3 fluoroperovskite using the first-principles modelling approach. The stability and characteristics of different cubic structures of BaCuF3 are evaluated, and the alpha-BaCuF3 and beta-BaCuF3 compounds are found to be mechanically stable with favorable optical properties for solar cells and high-frequency UV applications.
Article
Energy & Fuels
Dong Le Khac, Shahariar Chowdhury, Asmaa Soheil Najm, Montri Luengchavanon, Araa mebdir Holi, Mohammad Shah Jamal, Chin Hua Chia, Kuaanan Techato, Vidhya Selvanathan
Summary: A novel recycling system is proposed in this study to decompose and reclaim the constituent materials of organic-inorganic perovskite solar cells (PSCs). By utilizing a one-step solution process extraction approach, the chemical composition of each layer is successfully preserved, enabling their potential reuse. The proposed recycling technique helps mitigate pollution risks, minimize waste generation, and reduce recycling costs.
Article
Energy & Fuels
Peijie Lin, Feng Guo, Xiaoyang Lu, Qianying Zheng, Shuying Cheng, Yaohai Lin, Zhicong Chen, Lijun Wu, Zhuang Qian
Summary: This paper proposes an open-set fault diagnosis model for PV arrays based on 1D VoVNet-SVDD. The model accurately diagnoses various types of faults and is capable of identifying unknown fault types.
