Article
Construction & Building Technology
Chali Yadeta, Madhavi Indraganti, Gudina Terefe Tucho, Esayas Alemayehu
Summary: This study investigates thermal comfort, adaptive models, and behavioral adaptations in naturally ventilated residential buildings in Jimma town, Ethiopia. The research finds that a majority of occupants feel uncomfortable with the environmental temperature but are able to adapt through environmental adjustments, clothing choices, and activity levels.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Frank Suerich-Gulick, Anna Halepaska, Salmaan Craig
Summary: This study introduces the concept of temperature cascades and thermal nesting designs, and demonstrates how a thermally nested scheme can generate a natural temperature cascade. By analyzing thermal comfort and energy-saving limits, the study finds that thermal nesting can significantly reduce energy demand. The results also suggest that higher degrees of nesting, higher benchmark envelope conductance, and larger temperature increments lead to greater energy savings.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Antonio J. Aguilar, Maria L. de la Hoz-Torres, Maria Dolores Martinez-Aires, Diego P. Ruiz
Summary: This study assessed the impact of natural ventilation efficiency and university students' thermal perception during the cold season. The results showed that while the CO2 concentration was within the recommended range in most classrooms, only a small percentage of classrooms had thermal conditions that met the national regulations for comfort. These thermal conditions affected students' satisfaction and academic performance.
Article
Construction & Building Technology
Xue Wang, Liu Yang, Siru Gao, Shengkai Zhao, Yongchao Zhai
Summary: This study investigates seasonal variations in thermal environment and comfort in classrooms in cold area in China, observing significant differences in temperature, humidity, and CO2 concentration and suggesting cooling in summer and proper ventilation in winter.
ENERGY AND BUILDINGS
(2021)
Article
Energy & Fuels
Mishan Shrestha, Hom Bahadur Rijal
Summary: Students require a comfortable thermal environment for better academic learning and health. This study demonstrates the advantages of using passive design measures in Nepalese school buildings. Field surveys and simulations were conducted to evaluate the thermal environment and thermal comfort of students. The results showed that the integration of passive strategies reduced the operative temperature below the comfortable limit required during school hours.
Article
Metallurgy & Metallurgical Engineering
Mou Di, Cao Bin, Zhu Ying-xin
Summary: Kunming has a unique climate and most residential buildings are naturally ventilated. Despite the indoor temperature being lower than the comfort range, most residents still feel neutral and comfortable. The neutral temperature in Kunming is determined to be 16.96 degrees C, with an acceptable thermal sensation vote (TSV) range of -0.72 to 1.52.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2022)
Article
Construction & Building Technology
Giulia Lamberti, Francesco Leccese, Giacomo Salvadori, Francesca Contrada, Andrea Kindinis
Summary: In educational buildings, adaptive strategies can be implemented to achieve thermal comfort and reduce energy consumption. The role of climate in defining different adaptive capacities, thermal neutrality, comfort, and preference needs to be understood. A study was conducted on 17 naturally ventilated university classrooms from 10 buildings in Italy and France, collecting 1377 questionnaires related to environmental parameters. The results showed that despite performing fewer adaptive actions, French students had a lower neutral temperature compared to Italian students, indicating a climate-dependent adaptation.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Haruka Kitagawa, Takashi Asawa, Yukari Hirayama
Summary: This study investigates the optimal window-opening control strategy to maximize annual thermal comfort in naturally ventilated buildings using ventilative cooling and phase change materials (PCMs). The research findings demonstrate that prioritizing PCM thermal storage in the morning and comfort ventilation in the afternoon, with an indoor temperature criterion of 27 degrees C, significantly increases the thermal comfort period and reduces electricity consumption for space cooling.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Carlos Zepeda-Gil, Sukumar Natarajan
Summary: The study indicates that a significant portion of Mexico's population lacks adequate housing conditions, especially under cold winter climates. Current Mexican houses are unable to provide sufficient indoor thermal comfort environments, indicating the need for a more extensive insulation program.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Cesar Ramirez-Dolores, Jorge Wong-Loya, Fernando Velasco-Tapia, Jorge Andaverde
Summary: Thermal comfort is an essential factor in building design, construction, and renovation, as well as in understanding human behavior and mental conditions. This study proposes general thermal comfort equations for hot-humid and hot-dry climates through rigorous statistical evaluation. The equations can be used to assess the thermal comfort and energy evaluations of buildings in locations where no locally developed equations exist.
Article
Construction & Building Technology
Haruka Kitagawa, Takashi Asawa, Maria Alejandra Del Rio, Tetsu Kubota, Andhang Rakhmat Trihamdani
Summary: This study investigated the applicability of a thermal energy simulation (TES) for a naturally ventilated building with a PCM-based radiant floor cooling system. The TES model was validated by comparing it with field measurements and a CFD simulation. Good correlations were observed between the measurement and TES simulation, and the TES had similar accuracy to the coupled CFD. The results showed that the proposed PCM-based radiant floor cooling system achieved a thermal comfort period of up to 68.5% a year.
BUILDING AND ENVIRONMENT
(2023)
Article
Energy & Fuels
Francesco Fiorito, Giandomenico Vurro, Francesco Carlucci, Ludovica Maria Campagna, Mariella De Fino, Salvatore Carlucci, Fabio Fatiguso
Summary: This paper examines the impact of user behavior on indoor thermal comfort conditions and predicts the thermal comfort patterns in historic residential buildings. The study finds that the stochastic model is more accurate than the rule-based model in reducing discomfort conditions in various climate scenarios.
Article
Green & Sustainable Science & Technology
Yao Tao, Haihua Zhang, Lili Zhang, Guomin Zhang, Jiyuan Tu, Long Shi
Summary: This study investigates the influences of facade and room configurations as well as environmental factors on buoyant-driven natural ventilation. Results show that the dimensions of NVDSF and the size of window openings are the primary factors affecting ventilation performance, while room/window configurations also play a crucial role.
Article
Construction & Building Technology
Noor Muhammad Abd Rahmam, Lim Chin Haw, Ahmad Fazlizan, Azman Hussin, Muhammad Syukri Imran
Summary: This study determines the thermal comfort conditions in a naturally ventilated public hospital ward using three methods: simulation, measurements, and surveys. The results reveal that the thermal conditions in the studied ward were uncomfortable and require further improvement.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Maria L. de la Hoz-torres, Antonio J. Aguilar, Nelson Costa, Pedro Arezes, Diego P. Ruiz, Ma Dolores Martinez-Aires
Summary: Providing suitable indoor thermal conditions is crucial for students' performance and well-being in educational buildings. A field survey was conducted to analyze and evaluate the clothing insulation of university students. A predictive clothing insulation model was developed using an artificial neural network algorithm, considering various factors such as indoor and outdoor temperatures, radiant temperature, gender, and season. The model showed good performance compared to the ASHRAE-55 Standard.
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)
Article
Environmental Sciences
Britta Herbig, Victor Norrefeldt, Florian Mayer, Anna Reichherzer, Fang Lei, Pawel Wargocki
Summary: This study investigated the impact of higher recirculation air rates in aircraft cabins on passengers' health and well-being, and the role of occupancy in this. The results showed that passengers in half-occupied cabins had minimal reactions to increased recirculation air rates, while passengers in fully occupied cabins reported higher sleepiness and stress reactions when the recirculation air rate was high.
ENVIRONMENTAL RESEARCH
(2023)
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.
Review
Construction & Building Technology
Minh Tien Tran, Wenjuan Wei, Claire Dassonville, Christophe Martinsons, Pascal Ducruet, Corinne Mandin, Valerie Hequet, Pawel Wargocki
Summary: As the importance of indoor environmental quality (IEQ) in schools becomes more recognized, a systematic strategy for assessing IEQ needs to be developed. This paper provides a summary of parameters measured in school classrooms to characterize the quality of thermal, acoustic, visual environments, and indoor air quality (IAQ). The review of literature from Europe and North America over the past ten years identified 88 papers that described measurements in schools. The review reveals inconsistencies in measurement methods, parameters, and concentrations, suggesting the need for a standardized rating scheme and protocols for assessing classroom IEQ.
Article
Psychology, Multidisciplinary
Haijiao Cui, Bin Cao, Aimei Li, Zhaohui Li
Summary: Subjective value plays a fundamental role in decision-making processes and individuals' sense of happiness. We propose an attention-and-reference-dependent subjective value model that considers absolute and relative subjective value as well as attention distribution to better capture decision-makers' psychological characteristics. This model offers a theoretical tool for explaining, predicting, and adjusting decision behaviors. Additionally, our study compares hedonic editing strategies to maximize the overall experienced subjective value and reveals the stimulus-intensity-sensitive optimal strategy, contradicting the hedonic editing strategy based on the prospect theory value function when stimulus intensity is relatively small. The findings enrich transaction utility theory and expectation-disconfirmation theory, providing guidance for decision-makers to enhance happiness by rational management of gains and losses.
JOURNAL OF HAPPINESS STUDIES
(2023)
Article
Construction & Building Technology
Zhibin Wu, Andreas Wagner
Summary: This study investigated the relationship between indoor and outdoor air temperature and relative humidity in China's subtropical countryside. The results showed a strong correlation between indoor and outdoor air temperatures, while the correlation between indoor and outdoor relative humidity was moderate. Additionally, it was found that indoor temperatures were generally lower than the lower temperature limit of the adaptive comfort band in all seasons.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Jakub Kolarik, Nadja Lynge Lyng, Rossana Bossi, Rongling Li, Thomas Witterseh, Kevin Michael Smith, Pawel Wargocki
Summary: This study used cluster analysis to evaluate the ability of five commercially available metal oxide semiconductor (MOS) volatile organic compound (VOC) sensors to detect pollutants in a residential setting. The results showed that clustering could help determine whether a particular sensor matched the intended emission scenario.
Review
Engineering, Environmental
Feixia Zhao, Xueying Li, Mingxing Zuo, Yunshan Liang, Pufeng Qin, Hui Wang, Zhibin Wu, Lin Luo, Chao Liu, Lijian Leng
Summary: In this paper, the precursor materials, physical and chemical properties, as well as the preparation methods of CQDs decorated photocatalysts are discussed. The effects of reaction conditions, precursor and reaction medium on the structural characteristics of CQDs decorated photocatalysts are summarized. The applications and recent progress of CQDs decorated photocatalysts, including organic pollutants degradation, hydrogen production, and carbon dioxide conversion, are reviewed. The challenges and suggestions for future research of CQDs decorated photocatalysts are also proposed.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Xiaojun Fan, Chenxi Liao, Kazuya Matsuo, Kevin Verniers, Jelle Laverge, Brecht Neyrinck, Ivan Pollet, Lei Fang, Li Lan, Chandra Sekhar, Pawel Wargocki
Summary: A four-week-long field intervention experiment was conducted to investigate the effects of different ventilation rates on sleep quality and cognitive performance in bedrooms. The study found that lower ventilation rates resulted in significantly less deep sleep, more light sleep, and more awakenings. Additionally, a clear difference in deep sleep duration was observed between high and low ventilation rate conditions. However, no differences in cognitive performance were observed between the different ventilation conditions. These findings highlight the importance of proper ventilation control for optimal sleep quality.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Construction & Building Technology
Yan Yan, Mengyuan Kang, Haodong Zhang, Zhiwei Lian, Xiaojun Fan, Chandra Sekhar, Pawel Wargocki, Li Lan
Summary: In a high-density city, opening windows for sleep may lead to increased indoor temperature, higher PM2.5 concentration, and noise disturbance, which can negatively impact sleep quality.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Jinjun Ye, Pawel Wargocki, Zhengtao Ai
Summary: This study aimed to refine the CFD methodology for predicting particle fate in duct flows by investigating key issues and providing recommendations. The use of a 2D duct was found to underestimate particle deposition behavior, but using the uncorrected RSM model can improve the predictive accuracy of particle fate.
JOURNAL OF BUILDING ENGINEERING
(2023)
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)
