Article
Thermodynamics
Yao Tao, Xiang Fang, Haihua Zhang, Guomin Zhang, Jiyuan Tu, Long Shi
Summary: Thermochromic glazing smart windows are a promising technology for green buildings due to their self-regulating feature and low-maintenance need. This paper presents a validated computational fluid dynamics model to simulate the performance of these windows and determine the optimal switching temperatures under different climate conditions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Guoqi Chen, Kai Wang, Jiahui Yang, Jie Huang, Zhongfeng Chen, Jingxia Zheng, Jingquan Wang, Hailong Yang, Shengnan Li, Yueyue Miao, Wenquan Wang, Nannan Zhu, Xiancai Jiang, Yongming Chen, Jun Fu
Summary: Thermochromic smart windows with adjustable transition temperatures are developed for all-weather building temperature regulation in different climates. These windows have high solar modulation and light transmission efficiency, making them suitable for a variety of climate conditions.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jiwon Kim, Sangwon Baek, Jae Yong Park, Kwang Ho Kim, Jong-Lam Lee
Summary: The translated text describes a multilayer film technology for energy-saving windows that selectively blocks near-infrared while maintaining high transmittance in visible light.
Article
Energy & Fuels
Khaled Khaled, Umberto Berardi
Summary: In this article, a 1-D transient heat transfer model was developed in MATLAB/Simulink to evaluate the annual heating and cooling energy performance of thermochromic glazing. The results showed that thermochromic glazing outperformed clear and low-E windows for both climate conditions.
Article
Materials Science, Ceramics
Dongming Wang, Xiaomei Wu, Qiang Gao
Summary: Research on F-doped TiO2 nanocrystals can effectively reduce the energy consumption of cooling in hot summer days and improve the energy-saving performance of buildings. The F-TiO2 films exhibit high NIR shielding performance, which can be enhanced by increasing the F doping amount. Additionally, the F-TiO2 films also show good visible transmittance and the ability to lower indoor temperatures.
CERAMICS INTERNATIONAL
(2021)
Article
Nanoscience & Nanotechnology
Dongxu Ma, Lei Chen, Fu Fan, Qingyu Wang, Guihui Duan, Lei Bi, Linyu Mei, Kaixi Bi, Yiqin Chen, Huigao Duan
Summary: This article presents a dual-responsive smart window that can manage solar light in a range from ultraviolet to infrared. The smart window is made of a reversible thermoresponsive hydrogel and a ZnO/Ag/ZnO multilayer film. It shows high luminous transmittance, high luminous modulation, and outstanding solar modulation performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Construction & Building Technology
Su-yeon Jung, Sowon Han, Min-Goo Lee, Heangwoo Lee
Summary: Louvers are technical components used to improve energy performance in buildings. This study proposes a solar tracking-based movable louver system and examines its efficacy through a full-scale test bed. The findings demonstrate that the proposed system can improve indoor uniformity and reduce energy consumption.
Article
Materials Science, Ceramics
Guang Yang, Yongwei Liu, Chuanfan Yang, Fang Xia, Yupeng Wu, Yaroslav Shpotyuk, Viktor Takats, Huidan Zeng, Yinsheng Xu, Hongfei Chen, Yanfeng Gao
Summary: This study investigates the influence of NaF concentration on the formation of near-infrared (NIR)-shielding functional units in glass windows. The results show that an optimal level of NaF concentration can enhance the NIR-shielding performance, while excessive NaF inhibits the formation of the functional units. By adjusting the NaF concentration and adding a small amount of H2WO4 as the tungsten source, glass with excellent optical and thermal insulation properties can be produced.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Yujie Ke, Yutong Tan, Chengchen Feng, Cong Chen, Qi Lu, Qiyang Xu, Tao Wang, Hai Liu, Xinghai Liu, Jinqing Peng, Yi Long
Summary: The study presents a thermochromic window inspired by tetra fish, coated with photonic co-doped vanadium dioxides. The window exhibits angle-dependent vivid colors and has high transmittance, a practical transition temperature, and acceptable solar modulation property. It has superior energy-saving performances in representative cities in the Asia Pacific.
Article
Materials Science, Composites
Letian Zheng, Jiajie Zhang, Huanyao Hua, Zhujian Wu, Lian Wang, Yongjin Li
Summary: A novel microgel-based double-network hydrogel was developed as a smart shield for smart windows, which can intelligently regulate the solar transmittance according to the ambient temperature. Simulation results showed that the smart shield can reduce energy consumption by 21.04% compared to normal glass, and its energy-saving efficiency is higher than that of commercial low-E glass.
COMPOSITES COMMUNICATIONS
(2023)
Article
Construction & Building Technology
Yao Tao, Haihua Zhang, Yihuan Yan, Jiyuan Tu, Long Shi
Summary: Thermochromic glazing is an advanced smart window technology that can achieve nearly zero-energy buildings. This study investigates the impacts of solar radiation and natural convection on the temperature of the glazing, and develops a predictive model for calculating the glazing temperature. The model shows good agreement with simulated results and can assist in material design, product selection, and Building Energy Simulations.
ENERGY AND BUILDINGS
(2022)
Article
Thermodynamics
Qingdong Xuan, Guiqiang Li, Yashun Lu, Bin Zhao, Fuqiang Wang, Gang Pei
Summary: This study introduces a concentrator-photovoltaic window for building applications, which provides a uniform daylighting environment. Through ray-tracing simulation models and outdoor experiments, the daylighting performance of the window system is validated and found to significantly enhance daylighting uniformity compared to existing semi-transparent photovoltaic window systems.
Article
Energy & Fuels
Qiang Gao, Xiaomei Wu, Tao Huang
Summary: In doped CuS nanocrystals were synthesized and demonstrated excellent NIR shielding performance and high visible transmittance as solar shading materials. The doping of indium ions effectively enhanced the NIR shielding effect of CuS films, leading to a significant indoor temperature reduction of 8.4 degrees Celsius.
Article
Optics
Sheng-Fu Wang, Bo-Kang Su, Xue-Qi Wang, Yu-Chen Wei, Kai-Hua Kuo, Chih-Hsing Wang, Shih-Hung Liu, Liang-Sheng Liao, Wen-Yi Hung, Li-Wen Fu, Wei-Tsung Chuang, Minchao Qin, Xinhui Lu, Caifa You, Yun Chi, Pi-Tai Chou
Summary: This study revisits the theory of the energy gap law and proposes two approaches to favor emission. Experimental proof of concept is provided by designing and synthesizing a new series of self-assembled Pt(II) complexes. The results contribute significantly to the development of efficient OLEDs in the NIR(II) region.
Article
Materials Science, Multidisciplinary
Yaqiang Zhang, Haonan Li, Jiahao Ge, Chi Zhang, Jingzhou Li, Cheng Zhang, Ruixiang Deng, Yang Zhang, Hongxing Dong, Long Zhang
Summary: This paper proposes a highly Vis-NIR transparent metamaterial-window with outstanding microwave broadband absorption and practical durability. The experimental results demonstrate excellent absorptivity and shielding effectiveness, and the physical mechanism is explained using a multiple reflections interference model. The gold mesh structure enables the window to have excellent salt spray corrosion resistance and high-temperature stability, making it a promising candidate for anti-electromagnetic interference and electromagnetic shielding in military and civilian applications.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Construction & Building Technology
Jan-F Flor, Marina Aburas, Fedaa Abd-AlHamid, Yupeng Wu
Summary: This study investigated the user acceptance of different types of ETFE cushions in retrofitting office buildings through virtual reality technology. Results showed that users prefer clear ETFE in double-skin facades, while fritted and switchable ETFE received lower satisfaction. Overall, view clarity is a key factor in user acceptance of DSF facades.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Runqi Liang, Michael Kent, Robin Wilson, Yupeng Wu
Summary: The study found that different thermochromic tint states did not significantly affect visual acuity and sustained attention tests, but had a significant effect on the color naming task. Under blue tint conditions, subjects showed higher alertness and made fewer errors, while more natural and acceptable lighting conditions were found under bronze-tinted conditions.
ENERGY AND BUILDINGS
(2021)
Article
Energy & Fuels
Xiao Liu, Yupeng Wu
Summary: The study designed and investigated a Building Integrated Photovoltaic (BIPV) smart window system consisting of a thermotropic membrane synthesised using HPC and gellan gum gelling agent for electricity generation and solar control. An optical model was developed to characterise the thermotropic membrane and was used to design and optimise the proposed BIPV smart window, evaluating the effects of HPC concentration, geometric concentration ratio, membrane thickness and glass refractive index on PV power outputs. Experimental tests showed a significant decrease in transmittance with increased membrane temperature, and the prototype BIPV smart window demonstrated higher short-circuit current compared to a similar system without the thermotropic membrane.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
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
Construction & Building Technology
Qian Jin, Xiangyu Long, Runqi Liang
Summary: This study numerically investigated the energy-saving potential of combining thermochromic glazing and phase-change materials into an adaptive glazing system, and found that it can reduce total heat gain in summer but is less effective than normal double-glazing units in winter.
ENERGY AND BUILDINGS
(2022)
Article
Construction & Building Technology
Xiao Liu, Yupeng Wu
Summary: This study proposed a versatile window called Building Integrated Photovoltaic (BIPV) smart window, which combines an optically switchable thermotropic layer, photovoltaic cells, and different types of glass covers to improve daylighting control, on-site electricity generation, and building energy efficiency. Numerical simulations showed that installing the BIPV smart window in a south-oriented office can achieve significant annual energy savings and provide a more comfortable indoor luminous environment.
BUILDING AND ENVIRONMENT
(2022)
Review
Construction & Building Technology
Fedaa Abd-Alhamid, Michael Kent, Yupeng Wu
Summary: This paper systematically reviews studies on view perception and discusses the factors affecting view perception, as well as the impact of views on other visual and non-visual perceptions. The paper also critically reviews methods used to visually represent views and quantify view perception. An all-inclusive approach to quantify view quality is proposed.
BUILDING AND ENVIRONMENT
(2023)
Article
Materials Science, Ceramics
Guang Yang, Yongwei Liu, Chuanfan Yang, Fang Xia, Daming Hu, Yupeng Wu, Yaroslav Shpotyuk, Viktor Takats, Xiaoyan He
Summary: NIR-shielding window materials were made by embedding Ta0.3W0.7O2.85 nanocrystals in borosilicate glass-ceramics through a simple melt-quenching process. The concentration of H2WO4 and Ta2O5 in the starting materials can be adjusted to control the optical and thermal performance of the windows. The optimized window with 4.5 mol% H2WO4 and 0.3 mol% Ta2O5 exhibited high visible light transmittance (74.4%) and strong NIR-shielding ability (T=68.9%). Its thermal insulation performance is superior to soda lime glass or ITO glass, and its visible light transmission is higher than cesium-tungsten-bronze-based film coated glass. The NIR-shielding property is attributed to local surface plasmon resonance caused by oxygen vacancies in the Ta0.3W0.7O2.85 nanocrystals. This study provides a method for fabricating energy-saving windows with tunable NIR-shielding performance.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Xianghai Xing, Wei Lu, Guanhua Zhang, Yupeng Wu, Yanping Du, Zhibo Xiong, Li Wang, Kun Du, Hao Wang
Summary: In this study, a novel composite phase change material (PCM) consisting of a mixed solution of inorganic salt and organic salt was developed and characterized. Different weight percentages of sodium formate, potassium chloride, and water were evaluated to determine the optimal performance. The addition of xanthan gum and nano-TiO2 as gelling and nucleating agents, respectively, effectively improved the properties of the PCM by preventing phase separation, leakage, and reducing supercooling. The tested PCM showed excellent suitability for frozen food storage and transportation.
Article
Energy & Fuels
Xin Liu, Fangming Yang, Mengbin Li, Chenggong Sun, Yupeng Wu
Summary: This study presents a facile and scalable synthesis method for PCM-carbon foam composites using polyisocyanurate (PIR) foam derived carbon foam as a porous support. The carbon foam materials with a unique 3D molecular configuration exhibit high PCM loading capacity and excellent energy storage performance. The results provide a potential pathway for recycling PIR foams and producing cost-effective thermal energy storage materials.
Article
Energy & Fuels
Xin Liu, Haomin Wang, Xiao Liu, Fangming Yang, Li Guan, Suleiman Sani, Chenggong Sun, Yupeng Wu
Summary: In this study, novel salt composites were prepared using different mesoporous silica as the porous matrices and MgSO4 via impregnation method. The results showed that the MgSO4 loading level and textural properties of the porous matrices played a critical role in determining the water adsorption performance of the salt composites. The salt composites prepared with mesostructured cellular foam (MCF) exhibited excellent water adsorption capacity and hydration/dehydration rate, indicating their potential as promising candidates for low temperature energy storage.
Article
Construction & Building Technology
Dingming Liu, Mark Janos Kovacs-Biro, Karen Connelly, Fedaa Abd-AlHamid, Yupeng Wu
Summary: Daylighting enhances mood and visual comfort, but the design of glazed windows poses challenges for building designers. Coloured glazing, including chromatic glazing with unidirectional shifts in light color, affects human performance. This project explores the use of patterned chromatic glazing to distort color and improve the indoor luminous environment.
BUILDING AND ENVIRONMENT
(2023)
Article
Materials Science, Ceramics
Guang Yang, Yongwei Liu, Chuanfan Yang, Fang Xia, Yupeng Wu, Yaroslav Shpotyuk, Viktor Takats, Huidan Zeng, Yinsheng Xu, Hongfei Chen, Yanfeng Gao
Summary: This study investigates the influence of NaF concentration on the formation of near-infrared (NIR)-shielding functional units in glass windows. The results show that an optimal level of NaF concentration can enhance the NIR-shielding performance, while excessive NaF inhibits the formation of the functional units. By adjusting the NaF concentration and adding a small amount of H2WO4 as the tungsten source, glass with excellent optical and thermal insulation properties can be produced.
CERAMICS INTERNATIONAL
(2023)
Article
Thermodynamics
Haomin Wang, Xin Liu, Xiao Liu, Chenggong Sun, Yupeng Wu
Summary: This study used commercially available mesoporous silica as a porous matrix to prepare salt composites containing different salts. The physicochemical properties and water hydration/dehydration performance of the composites were characterized. The results showed that the salt loading level and type of salt played critical roles in determining the water adsorption performance of the composites, and most of the composites were capable of storing low-grade heat effectively.
Article
Construction & Building Technology
Fedaa Abd-Alhamid, Michael Kent, Yupeng Wu
Summary: This study examines the impact of window views on the psychological and physiological comfort and wellbeing of building occupants. The results show that increasing the size of the window leads to higher view perception evaluations, improved stress recovery, and positive psychological affect. Differences in window layout were also found, but only for a 10% window-wall ratio.
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)
