Article
Environmental Sciences
Prashant Kumar, Nidhi Rawat, Arvind Tiwari
Summary: A naturally-ventilated operational classroom was monitored to assess the spatial variations of classroom air pollution, thermal comfort, and ventilation indicators under different scenarios. The study found that CO2 and PM10 concentrations varied over time rather than space. Two air purifiers were most effective when placed in the most polluted area of the classroom. This study provides high-resolution data for validating detailed numerical models and informing decision-making to reduce children's exposure to air pollution and re-breathed CO2.
ENVIRONMENTAL RESEARCH
(2023)
Article
Construction & Building Technology
Changqing Yang, Lu Chen, Tong Li, Na Lu, Teng Gao, Xiaopan Gao, Angui Li
Summary: This paper studies the motion of thermal plume and the effect of multiple equidistant distributed point heat sources on stratified flow in naturally ventilated buildings. A formula for calculating the thermal stratification height of multiple heat sources is derived and validated, and the influences of heat source spacing, heat source surface emissivity, and other factors on thermal stratification flow are analyzed. The study also obtained a discrete threshold that can be used to estimate whether the thermal plume is independent and analyzed the variation in the effective entrainment coefficient of multiple plumes with the heat source distance. These results provide a reference for designing natural ventilation for buildings with multiple heat sources and creating a suitable indoor environment.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Xiaoying Sun, Hangzi Wu, Yue Wu
Summary: This study quantified individual sensation under the stimulation of multiple environmental factors and developed artificial neural networks for prediction. The results indicated crossed and interaction effects of environmental factors on occupants' sensation, and identified the environmental parameters leading to a neutral sensation. Recommendations for environment control strategies and further research were also provided based on the findings.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Lei Lei, Suola Shao
Summary: In recent years, natural ventilation has gained increasing interest from building designers due to the emphasis on sustainability and energy efficiency. However, traditional thermal sensation models are not applicable in naturally ventilated environments where the outdoor conditions can change rapidly. This study developed a deep belief neural network model to predict thermal sensation in naturally ventilated indoor environments, considering outdoor environment parameters and human factors. Results showed that the deep belief neural network significantly improved the prediction performance of thermal sensation in natural ventilated indoor environments, offering a more flexible and effective solution for thermal comfort prediction.
INDOOR AND BUILT ENVIRONMENT
(2023)
Article
Environmental Sciences
Alvaro Muelas, Pilar Remacha, Antonio Pina, Eduardo Tizne, Said El-Kadmiri, Ana Ruiz, Diego Aranda, Javier Ballester
Summary: CO2 monitoring is proven to be effective and affordable for controlling air ventilation in indoor shared spaces. This study thoroughly characterizes the distribution of CO2 in a naturally-ventilated classroom and provides useful information for optimizing ventilation strategies and CO2 monitoring system placement.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Construction & Building Technology
Minjung Lee, Yunchan Shin, Hoseong Lee, Honghyun Cho
Summary: The study investigated the effects of different resting conditions in a building under cooling and heating conditions on biosignals, finding that a cold water seat activated brain waves and reduced stress, while a hot water seat provided a stable environment and decreased LF/HF ratio. The use of an electric heating seat was associated with increased comfort but slightly higher stress levels for subjects.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Xiaodan Huang, Qingyuan Zhang, Zhangyuan Wang, Xiaoli Ma
Summary: This study aimed to develop a model for evaluating the thermal sensation of athletes in gymnasiums in hot-humid climate regions. A field survey was conducted on the thermal sensation of basketball players in a naturally ventilated gymnasium in Guangzhou, China. The results showed that there were significant differences in the thermal sensation of the players during active sports, and the thermal sensation was affected by air temperature, radiant temperature, humidity ratio, and air velocity. A predictive thermal sensation model was developed and evaluated for high-intensive sport activities in gymnasiums in regions with high temperature and high humidity.
INDOOR AND BUILT ENVIRONMENT
(2022)
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
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
Thermodynamics
Javad Ahmadi, Mohammadjavad Mahdavinejad, Olena Kalyanova Larsen, Chen Zhang, Somayeh Asadi
Summary: This study evaluates the thermal performance of folded Double Skin Facades (DSFs) in a hot climate in Iran. The results demonstrate that the fold geometry significantly affects the DSFs' performance and that the upper part of the cavity is suitable for Building Integrated Photovoltaic (BIPV) application in terms of capturing solar radiation.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2023)
Article
Green & Sustainable Science & Technology
Luciano C. de Faria, Marcelo A. Romero, Lucia F. S. Pirro
Summary: This study analyzed thermal sensation in non-residential buildings in Brazilian tropical climate and tested the effectiveness of suggested adaptive behaviors in improving thermal comfort. Results showed that the tested adaptive behaviors can improve thermal sensation from slightly-warm to neutral.
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
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
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)
