Article
Thermodynamics
Peng Xue, Yi Shen, Sheng Ye, Jinqing Peng, Yanyun Zhang, Qianqian Zhang, Yuying Sun
Summary: The secondary solar heat gain, which refers to the heat transfer from glazing to the indoor environment through longwave radiation and convection, increases with glazing absorption. With the rapid development of spectrally selective glazing, the secondary solar heat gain has become the main way for glazing heat transfer. Therefore, a dynamic model considering optical and heat transfer models, as well as outdoor radiation spectrum, is developed to accurately calculate the increasing secondary solar heat gain caused by spectrally selective windows. The model is verified and shown to have good agreement with experimental measurements.
BUILDING SIMULATION
(2023)
Article
Construction & Building Technology
A. R. Hassani, P. Domenighini, E. Belloni, T. Ihara, C. Buratti
Summary: Solar Heat Gain Coefficient (SHGC) is a significant factor in heating and cooling loads for transparent and translucent building elements. There is limited research on estimating SHGC for innovative highly insulating solutions like aerogel-based windows, and existing data lack accuracy. This paper presents a new analytical model for calculating the solar factor of granular aerogel-filled glazing systems. Experimental and simulation results were compared to validate the model, and it was found that the simulation method was more suitable due to its lesser dependence on weather conditions.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Abdultawab M. Qahtan
Summary: The thermal performance of the Reversible Smart Insulated Window Glazing (RSIWG) system in controlling solar heat gain in extreme climates was evaluated through laboratory experiments and analytical methods. The findings show that SIWG-colo reduces heat gain by 26% and 78% compared to double insulated glazing and clear glass, making it suitable for cooling seasons. On the other hand, SIWG-rev-colo exhibits slightly less heat loss, making it suitable for heating seasons, especially in the absence of solar radiation. Further research on multi-layer PDLC incorporating vacuum glass is recommended.
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2023)
Article
Construction & Building Technology
Marek Bartko, Pavol Durica
Summary: This paper examines the improvement of energy performance in buildings, focusing on reducing energy consumption for heating and cooling. It measures the heat transfer coefficient of window structures and analyzes the impact of outdoor conditions on the performance.
Review
Construction & Building Technology
Saman Abolghasemi Moghaddam, Nuno Simoes, Manuel Gameiro da Silva
Summary: The solar heat gain coefficient (SHGC, or g-value) is an important property of a glazing system that quantifies the passive solar thermal gains. Existing standardized numerical methods for determining g-values do not take into account real boundary conditions and often rely on assumptions and empirical parameters, leading to potential under- or over-estimation. Therefore, various experimental methods have been developed to assess g-values of windows, either individually or as supplementary methods. This review provides an analysis of these methods, considering the experimental conditions (laboratory or in-situ) and the tested window components (glazing part or entire window), and also proposes an approach for more precise and confident comparison of the reviewed methods and investigation of in-situ method reliability.
BUILDING AND ENVIRONMENT
(2023)
Article
Thermodynamics
Shu Zhang, Wanyu Hu, Dong Li, Chengjun Zhang, Muslum Arici, Cagatay Yildiz, Xin Zhang, Yuxin Ma
Summary: This study numerically investigated the energy performance of ten different glazing configurations in the severe cold climate of China. The results showed that adding PCM into the glass window degrades its thermal performance in winter, but using silica aerogel together with a PCM can improve thermal comfort. Adjusting optical parameters of the glass significantly enhances the energy efficiency of the glass window coupled with the silica aerogel and PCM.
Article
Multidisciplinary Sciences
Jaafar Jaber Abdulhameed, Tawfeeq Wasmi Mohammed
Summary: This study investigates the effect of using a nanocomposite layer in reducing heat gain in a hot arid region. The data collected shows that the nanocomposite layer can eliminate up to 73% of heat gain compared to traditional single-glass windows and 58% compared to air-filled double-glazing windows.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2023)
Article
Thermodynamics
Julia Pereira, Cristina Camacho Rivero, M. Gloria Gomes, A. Moret Rodrigues, Madelyn Marrero
Summary: The study examined the energy, environmental, and economic aspects of applying different solar control films to existing windows in buildings, as well as fully replacing windows as a retrofitting solution. Retrofitting solutions with higher light-to-solar gain ratios showed greater energy savings, while new windows had higher embodied energy compared to solar control films.
Article
Chemistry, Physical
Ainhoa Cots, Stefano Dicorato, Luigi Giovannini, Fabio Favoino, Michele Manca
Summary: Dual band electrochromic windows offer selective spectral control of incoming solar radiation in buildings, efficiently responding to lighting, heating, and cooling needs. Advancements in manufacturing and performance have led to the development of large smart window prototypes and the potential for reducing energy consumption and enhancing comfort in architectural glass systems.
Article
Construction & Building Technology
Roman Sheps, Pavel Golovinsky, Sergey Yaremenko, Tatyana Shchukina
Summary: The study introduces a new design for building fencing with multilayer heat storage panels to utilize solar radiation for thermal protection in cold winter. Experimental studies demonstrate the energy efficiency of the model in the Voronezh region. The engineering methodology of thermal simulation based on heat waves superposition accurately calculates heat flux in external multilayer fences, showing good agreement between experimental data and numerical simulations in terms of solar energy absorption. The business feasibility of utilizing passive solar panels for winter operation of buildings is also highlighted.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Faraz Afshari, Burak Muratcobanoglu, Emre Mandev, Mehmet Akif Ceviz, Ziba Mirzaee
Summary: This research evaluated the energy saving and thermal efficiency in glazed balconies and sunspace areas. It investigates the effects of double-glazing, black walls, black carpeted floors, and insulation material on the thermal efficiency of residential balconies. The results show that the maximum thermal efficiency achieved was 42.8% with double-glazing and insulated walls covered with recycled black papers.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Parham Sadooghi, Nazir P. Kherani
Summary: This study examines the thermal performance of various window systems, including single, double, triple, and quadruple 'pane' glazing systems, using advanced computational modeling analysis. The results show that optimal design parameters can reduce up to 90% of heat loss in winter under cold and hot climate conditions.
ARCHITECTURAL ENGINEERING AND DESIGN MANAGEMENT
(2022)
Review
Green & Sustainable Science & Technology
Guoqing Yu, Hongxing Yang, Daina Luo, Xu Cheng, Mark Kyeredey Ansah
Summary: BIPV windows integrate solar cells within window glazing, reducing building energy consumption and providing superior thermal insulation and electricity generation performance compared to traditional windows.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Article
Construction & Building Technology
Moncef Krarti
Summary: This study systematically analyzes the energy performance of different control strategies for smart glazed windows in office spaces, finding that optimized controls outperform rule-based controls in terms of energy savings. Additionally, using optimal threshold settings can substantially enhance the performance of rule-based controls.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Nanoscience & Nanotechnology
Sai Liu, Chi Yan Tso, Hau Him Lee, Yu Wei Du, Kin Man Yu, Shien-Ping Feng, Baoling Huang
Summary: Optically transparent wood has shown great potential as a promising alternative to glass for window applications due to its high optical transmittance, strong mechanical properties, and excellent thermal insulation capability. A new thermochromic transparent wood film (TTWF) has been proposed, which offers thermal switching of transmittance and features waterproof self-cleaning and anti-dust functions. This innovative material has advanced optical properties, robust mechanical strength, low thermal conductivity, and has demonstrated significant energy-efficient benefits in reducing indoor temperatures in smart windows.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Construction & Building Technology
Samiran Khorat, Debashish Das, Rupali Khatun, Sk Mohammad Aziz, Prashant Anand, Ansar Khan, Mattheos Santamouris, Dev Niyogi
Summary: Cool roofs can effectively mitigate heatwave-induced excess heat and enhance thermal comfort in urban areas. Implementing cool roofs can significantly improve urban meteorology and thermal comfort, reducing energy flux and heat stress.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Qi Li, Jiayu Chen, Xiaowei Luo
Summary: This study focuses on the vertical wind conditions as a main external factor that limits the energy assessment of high-rise buildings in urban areas. Traditional tools for energy assessment of buildings use a universal vertical wind profile estimation, without taking into account the unique wind speed in each direction induced by the various shapes and configurations of buildings in cities. To address this limitation, the study developed an omnidirectional urban vertical wind speed estimation method using direction-dependent building morphologies and machine learning algorithms.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Xiaojun Luo, Lamine Mahdjoubi
Summary: This paper presents an integrated blockchain and machine learning-based energy management framework for multiple forms of energy allocation and transmission among multiple domestic buildings. Machine learning is used to predict energy generation and consumption patterns, and the proposed framework establishes optimal and automated energy allocation through peer-to-peer energy transactions. The approach contributes to the reduction of greenhouse gas emissions and enhances environmental sustainability.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ying Yu, Yuanwei Xiao, Jinshuai Chou, Xingyu Wang, Liu Yang
Summary: This study proposes a dual-layer optimization design method to maximize the energy sharing potential, enhance collaborative benefits, and reduce the storage capacity of building clusters. Case studies show that the proposed design significantly improves the performance of building clusters, reduces energy storage capacity, and shortens the payback period.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Felix Langner, Weimin Wang, Moritz Frahm, Veit Hagenmeyer
Summary: This paper compares two main approaches to consider uncertainties in model predictive control (MPC) for buildings: robust and stochastic MPC. The results show that compared to a deterministic MPC, the robust MPC increases the electricity cost while providing complete temperature constraint satisfaction, while the stochastic MPC slightly increases the electricity cost but fulfills the thermal comfort requirements.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Somil Yadav, Caroline Hachem-Vermette
Summary: This study proposes a mathematical model to evaluate the performance of a Double Skin Facade (DSF) system and its impact on indoor conditions. The model considers various design parameters and analyzes their effects on the system's electrical output and room temperature.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ruijun Chen, Holly Samuelson, Yukai Zou, Xianghan Zheng, Yifan Cao
Summary: This research introduces an innovative resilient design framework that optimizes building performance by considering a holistic life cycle perspective and accounting for climate projection uncertainties. The study finds that future climate scenarios significantly impact building life cycle performance, with wall U-value, windows U-value, and wall density being major factors. By using ensemble learning and optimization algorithms, predictions for carbon emissions, cost, and indoor discomfort hours can be made, and the best resilient design scheme can be selected. Applying this framework leads to significant improvements in building life cycle performance.
ENERGY AND BUILDINGS
(2024)