Article
Construction & Building Technology
Navid Goudarzi, Mohammadamin Sheikhshahrokhdehkordi, Javad Khalesi, Seyedehhamideh Hosseiniirani
Summary: Wind catchers serve as passive cooling systems to improve air quality, thermal comfort, and reduce energy consumption in the residential sector. This study numerically investigates the indoor flow structure and thermal comfort of a room integrated with a two-sided wind catcher, showing that lowering the room outlet elevation can increase the mass flow rate, and increasing the outlet area to wall ratio at a specific elevation can achieve desired temperature stratification and velocity field.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Haofu Chen, Zhuangbo Feng, Shi-Jie Cao
Summary: The study examines the impact of air-supply speed and temperature on indoor thermal comfort and building energy consumption, introducing a dimensionless index Gr=Re2 for pre-evaluation of indoor comfort. A good level of indoor airflow settlement and diffusion effects is achieved when 106 < Gr Re2 < 105.
INDOOR AND BUILT ENVIRONMENT
(2021)
Article
Construction & Building Technology
Daniel P. Albuquerque, Paul D. O'Sullivan, Guilherme Carrilho da Graca
Summary: This study experimentally investigated the impact of typical window geometries on natural ventilation flows driven by wind shear, revealing that the combination of window geometry and wind direction significantly affects ventilation efficiency. The study identified the best window configurations for wind-driven natural ventilation in dense urban environments, proposing simple correlations for more accurate predictions than existing models.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Yalin Lu, Yuchun Zhang, Zhang Lin
Summary: This study proposes a zonal model for predicting dynamic non-uniform contaminant distribution in stratum ventilated rooms. The results show that the proposed model can accurately predict the contaminant distribution, with good consistency compared to experimental measurements.
Article
Construction & Building Technology
Guilherme Carrilho da Graca, Daniel P. Albuquerque, Mats Sandberg, P. F. Linden
Summary: Corner rooms and single-sided rooms with two or more open windows can be naturally ventilated in cross ventilation or pumping ventilation, showing that the occurrence of pumping ventilation depends on the direction of the wind.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Xiaoliang Shao, Xueying Wen, Ryoyong Paek, Yemin Liu, Yiwen Jian, Weiwei Liu
Summary: This study investigated the effect of a recirculated air curtain on transient contaminant transport in a room with diluted ventilation. The results showed that adding a recirculated air curtain significantly reduced pollution in the protected zone, with the optimal discharge air velocity and air intake position affecting the containment effect.
ENERGY AND BUILDINGS
(2022)
Article
Construction & Building Technology
Kyohei Kondo, Takashi Asawa
Summary: This study examined the effects of air temperature and wind speed on sleep quality in naturally ventilated rooms during autumn. The results showed that a nocturnal mean temperature of 23-24 degrees C was associated with the lowest percentage of wake after sleep onset (WASO), regardless of the window opening conditions. Subjective sleep satisfaction and WASO did not show significant differences between the conditions.
Article
Thermodynamics
Xuming Li, Guoqing Zhu, Lu He, Min Peng
Summary: This study investigates the characteristics and thickness of smoke flow under a curved roof in natural ventilation tunnels. It is found that the smoke mass flow rate is positively correlated with the heat release rate and section radius, while the smoke layer thickness is not significantly affected by the heat release rate and is positively related to the section radius. A practical prediction model for smoke layer thickness and an empirical equation for estimating the total smoke mass flow rate are proposed, and the results are in good agreement with previous simulations and experimental data.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Dwinanto Sukamto, Monica Siroux, Francois Gloriant
Summary: This study focuses on a ventilated bioclimatic wall for nearly zero-energy buildings, investigating the thermal performance characteristics and the influence of air space thickness and air flow rate on the wall's thermal efficiency through an experimental setup.
Article
Green & Sustainable Science & Technology
Mady A. A. Mohamed, Mohamed F. El-Amin
Summary: This paper quantifies the effectiveness of windcatcher on air temperature and airflow inside buildings through analytical literature review, context analysis, and numerical simulations. The results confirm that windcatcher significantly lowers air temperature in different floors. However, it is recommended to consider the number of floors, opening area, and opening position when using windcatcher.
Article
Construction & Building Technology
Murtaza Mohammadi, John Kaiser Calautit, John S. Owen, Christof Gromke, Yupeng Wu, Hao Liu
Summary: This study investigates the wind-driven transmission of pollutants between indoor rooms adjacent to a street canyon. It found that the ventilation efficiency and room location have an impact on the transmission. Increasing ventilation rate can reduce cross transmission between rooms, while rooms at the center of the canyon are more susceptible to contamination.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Engineering, Mechanical
Fengguo Liu, Shihua Cao, Wenlei Zhou, Dongfang Zhao, Longfeng Zheng, Meng Shao
Summary: The characteristics of gas proportional valve (GPV) in regulating pressure were studied using dynamical simulation method. The analysis focused on the displacement, total pressure, and velocity of the spool during opening. It was found that the turbulence in the downstream of GPV became more obvious as time increased. Additionally, the influence of different inlet working pressures on spool displacement was analyzed, and the spool reached a stable state of full opening in less than 1.5 x 10(-2) s. The transient process of outlet flow was also investigated, with the simulated outlet flow stable at 152 m(3)/h for maximum opening. The results provide valuable insights for the optimization and engineering application of GPV.
FLOW MEASUREMENT AND INSTRUMENTATION
(2023)
Article
Construction & Building Technology
J. F. San Jose Alonso, M. A. Sanz-Tejedor, Y. Arroyo, M. R. San Jose-Gallego
Summary: This study quantifies the air flow entering the operating room during the process of door opening and closing, and finds that sliding doors can reduce the entry of air from adjacent areas.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Environmental Sciences
Santiago Francisco Corzo, Dario Martin Godino, Damian Enrique Ramajo
Summary: The external and internal airflow analysis in an urban bus was conducted through computational fluid dynamics. The study found that partially or fully opening the bus windows can reduce the risk of airborne disease transmission.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Thermodynamics
Piotr Wisniewski, Miroslaw Majkut, Slawomir Dykas, Krystian Smolka, Guojie Zhang, Balazs Pritz
Summary: This paper thoroughly analysed the influence of different condensation models on the modelling of condensation phenomena in transonic flows of moist air, comparing results with experiments to recommend the most suitable model. The focus was on the onset of the nucleation process and the droplet growth intensity, leading to specific conclusions.
APPLIED THERMAL ENGINEERING
(2022)
Article
Energy & Fuels
M. Senthil, K. Visagavel, A. Avinash
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2016)
Article
Chemistry, Applied
M. Senthil, K. Visagavel, C. G. Saravanan, Karthik Rajendran
FUEL PROCESSING TECHNOLOGY
(2016)
Article
Thermodynamics
V. Sivakumar, K. Visagavel, A. Selvakumar
JOURNAL OF APPLIED FLUID MECHANICS
(2017)
Article
Engineering, Multidisciplinary
H. Abdul Zubar, K. Visagavel, V. Deepak Raja, Arun Mohan
JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH
(2014)
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.
