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
Green & Sustainable Science & Technology
Zihao Li, Wei Zhang, Lingzhi Xie, Wei Wang, Hao Tian, Mo Chen, Jianhui Li
Summary: The research on the Semi-Transparent Photovoltaic (STPV) Window revealed that its EPBT is 13.8 years and GPBT is 10.4 years, both less than the preset service life of 25 years. Optimization analysis can make the STPV window more economical and sustainable.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Chemistry, Physical
Tong Liu, Yang Zheng, Yunxiang Xu, Xianjie Liu, Chuanfei Wang, Liangmin Yu, Mats Fahlman, Xiaoyi Li, Petri Murto, Junwu Chen, Xiaofeng Xu
Summary: This study introduces a monolithic hybrid device by integrating high-performance semitransparent polymer solar cells (ST-PSCs) and liquid-solid triboelectric nanogenerators (TENGs). The hybrid device achieves high solar conversion efficiency and transparency, enabling efficient light-to-electricity conversion on sunny days and waterdrop energy conversion on rainy days. It also provides controlled ambient temperature and specific transmittance windows for plant growth, showcasing its potential in agricultural applications.
Article
Thermodynamics
Md Muin Uddin, Chuyao Wang, Chengyan Zhang, Jie Ji
Summary: This study investigates the overall energy-saving performance of a CdTe-based semi-transparent PVCHVG and compares it with commonly used window systems. The results demonstrate that PVCHVG has good insulation properties and can save energy, as well as generate electricity.
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
Nanoscience & Nanotechnology
Yunzhi Gu, Xiang Yao, Huaxiu Geng, Guijian Guan, Minglie Hu, Mingyong Han
Summary: TLSCs incorporating heterophase lead-free perovskites exhibit high efficiency and excellent stability, with an optical conversion efficiency of 1.15% and a high average visible transmission of 86.70%, showing dual-color white emission between 350 and 760 nm.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Thanh Tai Nguyen, Malkeshkumar Patel, Sangho Kim, Vinh-Ai Dao, Joondong Kim
Summary: The implementation of transparent photoanodes using metal-oxide junctions has shown promising results in improving the efficiency of photoelectrochemical cells for solar-driven hydrogen generation. The study demonstrates the potential of stacked photoanodes with PTPE cells to enhance photocurrent, providing a pathway for the development of robust on-site energy generation systems.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Construction & Building Technology
Danny H. W. Li, Emmanuel I. Aghimien, Khalid Alshaibani
Summary: This study uses measured solar radiation and daylight data in Hong Kong to analyze the energy potential and impact on building energy consumption of semi-transparent building-integrated photovoltaic (BIPV) systems. The findings show that BIPV facades with a large window-to-wall ratio of 80% can provide an overall energy benefit of up to 7126 kWh.
Article
Energy & Fuels
Maria Kanwal, Nadia Shahzad, Muhammad Ali Tariq, Muhammad Imran Shahzad
Summary: The study successfully prepared ETCs with high conductivity and visible light transparency by mixing reactive silver ink with low temperature sintering conductive silver paste, making them suitable for use in thermally sensitive optoelectronic and photovoltaic devices; this composite material reduces optical and electrical losses, and exhibits better performance compared to bare transparent conductive oxides.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Chemistry, Multidisciplinary
Jae Choul Yu, Bin Li, Christopher J. Dunn, Junlin Yan, Benjamin T. Diroll, Anthony S. R. Chesman, Jacek J. Jasieniak
Summary: This study investigates the role of A- and X-site modifications in APbX(3) perovskites, finding that Cs and FA composition delivers optimal device performance within a range of band gaps. Using this optimized composition, semi-transparent perovskite solar cells achieve a power conversion efficiency of 15.5% and exhibit excellent long-term stability.
Article
Thermodynamics
Ying Nie, Wei He, Xianghua Liu, Zhongting Hu, Hancheng Yu, Haixiang Liu
Summary: This study presents a smart luminescent solar concentrator (LSC) for building integrated concentrating photovoltaic (BICPV) windows. The proposed smart LSC combines fluorescent dyes with thermochromic materials to enhance photoelectric conversion efficiency and create a dynamic response mechanism to solar radiation and temperature changes. By conducting optical simulations and outdoor experiments, the research provides design parameters for a BICPV smart window system with improved power generation efficiency.
BUILDING SIMULATION
(2022)
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
Energy & Fuels
Maximilian Goetz-Koehler, Hosni Meddeb, Kai Gehrke, Martin Vehse, Carsten Agert
Summary: This study explores the use of ultrathin solar absorbers embedded in an optical cavity to create photovoltaic windows that can switch between transparent and energy harvesting modes. The thickness of the mirror layer influences light absorption, photocurrent generation, transmission, and color neutrality of the device. Increasing the thickness of the magnesium layer leads to higher average transparency and power conversion efficiency in the device.
IEEE JOURNAL OF PHOTOVOLTAICS
(2021)
Article
Materials Science, Multidisciplinary
A. Bouarissa, A. Gueddim, N. Bouarissa, H. Maghraoui-Meherezi
Summary: A novel ZnO/MoS2/CZTS solar cell structure was proposed and investigated, achieving a conversion efficiency of about 23.69%, which compares reasonably with previously quoted data.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Chemistry, Physical
Jun-Sik Cho, Yeong Hun Seo, Ahreum Lee, Sungeun Park, Kihwan Kim, Ara Cho, Seungkyu Ahn, Jinsu Yoo, Joo Hyung Park
Summary: Transparent photovoltaic tandem devices with controlled absorber thickness exhibited high power conversion efficiencies and improved performance under bifacial illumination. These devices maintained excellent PV performance even at low-light intensities.
APPLIED SURFACE SCIENCE
(2022)
Article
Energy & Fuels
Bin Zou, Jinqing Peng, Sihui Li, Yi Li, Jinyue Yan, Hongxing Yang
Summary: This study compared different operation strategies for grid-connected photovoltaic-battery systems and found that the dynamic programming (DP) strategy is more flexible and economically advantageous. The maximizing self-consumption (MSC) strategy performs well in self-consumption and self-sufficiency rates, while the time-of-use (TOU) strategy excels in economic performance under low battery cost conditions but causes significant battery aging. These findings can guide decision makers in choosing the proper management strategy for practical PVB systems.
Article
Engineering, Multidisciplinary
Zhengyi Luo, Jinqing Peng, Jingyu Cao, Rongxin Yin, Bin Zou, Yutong Tan, Jinyue Yan
Summary: This paper reviews recent research on the demand flexibility of residential buildings, including definitions, flexible loads, and quantification methods. It proposes a comprehensive definition of building demand flexibility and summarizes the flexibility capabilities and operation characteristics of main residential flexible loads. The paper also reviews and summarizes models and evaluation indicators to quantify the flexibility of these loads. Current research gaps and challenges are identified and analyzed as well.
Article
Energy & Fuels
Yi Li, Jinqing Peng, He Jia, Bin Zou, Bin Hao, Tao Ma, Xiaoyang Wang
Summary: The study introduces an energy management strategy considering economic feasibility and photovoltaic self-consumption rate, optimizing the FiT revenue streams for the PV-BESS through a dynamic programming algorithm. It is shown that the dispatch strategy could achieve superior performance in cold regions of China, while identifying indices affecting economic performance to validate the feasibility of the proposed algorithm.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Jiaojiao Duan, Nianping Li, Jinqing Peng, Chenhua Wang, Qingqing Liu
Summary: In this study, a full-response model of thermal circuit transient analysis for wall heat transfer was established based on thermoelectric analogy mechanism and circuit analysis principles. The model was validated by comparing results with experiments, showing significant attenuation and lag in temperatures of middle and inner surfaces of the wall compared to the outer surface. Overall, the proposed model improves adaptability of the thermoelectric analogy resistance and capacitance (RC) network model and provides a theoretical basis for research on multisystem heat transfer.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Energy & Fuels
Jingyu Cao, Ling Zheng, Jinqing Peng, Wenjie Wang, Michael K. H. Leung, Zhanying Zheng, Mingke Hu, Qiliang Wang, Jingyong Cai, Gang Pei, Jie Ji
Summary: Vapour compression heat pump is an efficient cooling and heating system using renewable energy sources that plays a significant role in building energy conservation. The efficiency of heat pump cycle is closely related to its thermal source condition, and stable heat sources can greatly benefit its performance. This review summarises the recent progress in using different renewable energy sources as thermal sources for heat pumps and emphasises the research on solar-assisted air source heat pumps, solar-assisted ground source heat pumps, and air-ground dual-source heat pumps. It also provides recommendations for further research and marketisation of these technologies based on performance characterisation and comparison.
Article
Energy & Fuels
Arash Kazemian, Meysam Khatibi, Tao Ma, Jinqing Peng, Yang Hongxing
Summary: A new unit named photovoltaic thermal with solar thermal collector enhancer has been developed, which improves the photothermal energy conversion ratio and system performance compared to conventional photovoltaic thermal systems. Different glazing arrangements, tilt angle, azimuth angle, mass flow rate, and dust accumulation are investigated for their effects on the system. Results show that the proposed system has significantly higher power and shorter payback time.
Article
Thermodynamics
Houpei Li, Jun Li, Sihui Li, Jinqing Peng, Jie Ji, Jinyue Yan
Summary: This study investigated the matching characteristics of PVAC using a case in an office room. A coupled simulation model was built to integrate the building, PV, AC, and control strategy. The results showed that optimizing the PV and battery capacities, as well as setting the PV factor and battery factor appropriately, could maximize the AC efficiency and ensure grid flexibility.
Article
Construction & Building Technology
Bin Zou, Jinqing Peng, Rongxin Yin, Zhengyi Luo, Jiaming Song, Tao Ma, Sihui Li, Hongxing Yang
Summary: This study developed a method that combines model predictive control (MPC) with dynamic programming (DP) for consecutive operation scheduling of the PVB system. Real power data from a household were collected for optimization. Three strategies, including economic optimization, grid-power optimization, and maximizing self-consumption, were proposed and compared comprehensively. The experiments conducted in the lab showed that the developed method considers the interactive effects of adjacent days. The findings of this study can be used as guidance for optimal design and operational management of residential PVB systems.
ENERGY AND BUILDINGS
(2023)
Article
Thermodynamics
Zhengyi Luo, Jinqing Peng, Yutong Tan, Rongxin Yin, Bin Zou, Maomao Hu, Jinyue Yan
Summary: Leveraging the flexibility of static batteries and residential flexible loads is an effective way to reduce the impacts of intermittent renewable energy power generation on the utility grid. A novel forecasting and flexibility-based operation strategy was proposed for the PV-battery-FL system to manage distributed energy resources. The strategy fully harnesses the flexibility of batteries and residential flexible loads, and outperforms traditional strategies in terms of grid-friendliness and performance.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Editorial Material
Green & Sustainable Science & Technology
Chao Shen, Jinqing Peng, Dengjia Wang, Gang Pei
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
Green & Sustainable Science & Technology
Xinyi Feng, Tao Ma, Yohei Yamaguchi, Jinqing Peng, Yanjun Dai, Dongxu Ji
Summary: This study assesses the solar irradiation resources and BIPV potential of residential buildings in different climate zones of China, concluding that roofs are the best option for BIPV installation. The study emphasizes the contribution of a combined rooftop and south facade BIPV system to building energy, and presents a comprehensive research framework for evaluating the potential of residential BIPV systems in various regions of China. The findings can provide guidance for BIPV deployment in China, especially as many provinces have implemented policies to promote distributed PVs.
ENERGY FOR SUSTAINABLE DEVELOPMENT
(2023)
Article
Energy & Fuels
Yang Liu, Youming Chen, Lin Lu, Jinqing Peng, Dongmei Zheng, Bin Lu
Summary: A new model was proposed to calculate the optical path of the granular aerogel layer in the Aerogel Glazing System (AGS). Through geometric optics, the optical path of a single aerogel granule was calculated and converted into a homogeneous distribution in the inhomogeneous distribution of aerogel granules. The calculated optical path was used to simulate the spectral transmittance of different AGSs and evaluate their energy performances under different weather conditions.
Article
Green & Sustainable Science & Technology
Yutong Tan, Jinqing Peng, Yimo Luo, Houpei Li, Meng Wang, Fujia Zhang, Jie Ji, Aotian Song
Summary: Windows are a major cause of heat loss in buildings, and advanced glazing development is necessary worldwide. A Python language daylight-electrical-thermal coupling model was developed for vacuum integrated photovoltaic (VPV) glazing to evaluate its real-time zero-energy potential. The model integrated numerical heat transfer and electrical models, as well as decision tree and random forest algorithms for glare and illuminance prediction. Validation through outdoor experiments showed acceptable errors. Key parameters affecting VPV glazing performance were determined through sensitivity analysis. A case study in a hot summer and cold winter zone in China showed that an optimal design of VPV glazing can achieve 67% zero-energy hours throughout the year. This study provides a validated model for performance evaluation and optimization of VPV glazing for engineering applications.
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)
