Article
Construction & Building Technology
Yin Tang, Hang Yu, Hai Ye, Kege Zhang, Faming Wang, Huice Mao, Zi Wang
Summary: Clothing plays a role in the heat exchange between the human body and the environment, with varying thermal resistance across different body parts. Current standards lack the ability to estimate local clothing insulation, making it challenging for field studies and human experiments. This study proposes a method to estimate local insulation values based on overall insulation and presents its application in determining the insulation of ensembles. By developing prediction models based on thermal manikin tests, reference local insulation values can be obtained. This research provides standardized local clothing insulation values that can be used in heat transfer analysis and local thermal comfort research.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Yin Tang, Zixiong Su, Hang Yu, Kege Zhang, Chaoen Li, Hai Ye
Summary: This study measured the local insulation of 57 typical garments and 62 ensembles with different layers, finding significant differences in local insulation values compared to overall insulation values, especially varying greatly between different body parts. A new method for estimating the overall insulation of ensembles was proposed based on prediction equations of local insulation, resulting in a reduction of mean relative error from 12.6% to 3.4% compared to traditional linear regression equations. This study provides basic data and prediction equations for future research on clothing insulation and local thermal comfort.
BUILDING AND ENVIRONMENT
(2022)
Article
Thermodynamics
Zhimin Zheng, Yuchun Zhang, Yudong Mao, Yanping Yang, Chuhao Fu, Zhaosong Fang
Summary: Through field measurements and questionnaire surveys, this study found that the SET* and PMV models obtained in the current research cannot accurately evaluate the thermal comfort of people in prefab construction site offices. Calculations showed that the natural SET* values in prefab buildings were higher than the preferred SET*, leading to the need for model revisions to improve accuracy.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Construction & Building Technology
Shan Gao, Ryozo Ooka, Wonseok Oh
Summary: Development of multi-node thermoregulation models with local clothing insulation as an input parameter enables distinguishing spatial and temporal changes in the thermal environment. However, research on local clothing insulation lags compared with multi-node thermoregulation models, affecting prediction accuracy. This study determined overall and local intrinsic clothing insulation values using different methods and found that methods and posture affect both overall and local intrinsic clothing insulation.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Sirong Qu, Zhiliang Wang, Weiwei Liu
Summary: This study established an outdoor clothing model for Changsha based on climate characteristics through two consecutive years of field experiments, verifying the assumption that clothing adjustment is influenced by temperature.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Akito Nakagawa, Takashi Nakaya
Summary: Through studying the distribution of clothing insulation between the upper and lower body in a cold environment, it was found that adjusting the insulation of the upper body can affect the overall clothing insulation and adapt to the thermal environment.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Xue Feng, Eryan Bin Zainudin, Hong Wen Wong, King Jet Tseng
Summary: Traditional HVAC systems operate on a fixed schedule regardless of occupancy or external temperature. This paper proposes a machine learning-based approach using the ASHRAE RP-884 database to forecast the thermal comfort levels of building occupants. The results show high accuracy and low error in predicting the comfort levels.
ENERGY AND BUILDINGS
(2023)
Article
Thermodynamics
Karim Aliakbari, Amir Ebrahimi-Moghadam, Paria Ildarabadi
Summary: This study investigates the effects of a novel transparent nano-insulation in building windows on thermal comfort and energy consumption by developing a comprehensive dynamic model and evaluating five main parameters. The results show significant improvements in thermal comfort and reductions in energy consumption under different climate conditions in Iran.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2021)
Article
Construction & Building Technology
Ricardo Forgiarini Rupp, Ongun Berk Kazanci, Jorn Toftum
Summary: Clothing insulation is a crucial parameter for assessing thermal comfort, and accurately predicting it can be challenging. This study analyzed the clothing insulation in the ASHRAE Global Thermal Comfort Database and developed predictive models to improve thermal comfort predictions.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Paolo Lenzuni
Summary: The paper describes a method for checking if conditions in a given indoor work environment comply with the relevant limit of acceptability for thermal comfort. The proposed method focuses on identifying a representative value of the synthetic thermal comfort index PMV for comparison with the limit of acceptability, while ignoring measurement uncertainties. The results have been used for improving the existing methods for evaluation and assessment of long term comfort by deriving a more appropriate expression for weighting different exposures and identifying a limit of acceptability.
BUILDING AND ENVIRONMENT
(2021)
Review
Construction & Building Technology
Runming Yao, Shaoxing Zhang, Chenqiu Du, Marcel Schweiker, Simon Hodder, Bjarne W. Olesen, Jorn Toftum, Francesca Romana D'Ambrosio, Hansjuergen Gebhardt, Shan Zhou, Feng Yuan, Baizhan Li
Summary: This paper reviews the historical evolution of thermal comfort research, focusing on adaptive thermal comfort studies and evaluating representative prediction models. Based on the analysis, three thermal environment assessment approaches are classified and their strengths and constraints are analyzed.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Silvia Ruggiero, Francesco Tariello, Giuseppe Peter Vanoli
Summary: This study investigates the thermo-hygrometric comfort in hospitals, focusing on patients in ordinary hospitalization rooms. The analysis considers various factors and characteristics that influence comfort indices and examines the application of two comfort models. The results show that patient position, clothing type, and coverage level significantly impact the microclimatic conditions, and seasonal analyses reveal discomfort during summer for bedridden patients.
Article
Construction & Building Technology
Heng Du, Zhiwei Lian, Dayi Lai, Lin Duanmu, Yongchao Zhai, Bin Cao, Yufeng Zhang, Xiang Zhou, Zhaojun Wang, Xiaojing Zhang, Zhijian Hou
Summary: This study assessed the performance of PMV and its revised models using the Chinese Thermal Comfort Database, finding better accuracy in air-conditioned buildings but limited improvements in different subset cases.
ENERGY AND BUILDINGS
(2022)
Article
Biophysics
Shan Gao, Ryozo Ooka, Wonseok Oh
Summary: The study found that the convective and radiative heat transfer coefficients of different clothing ensembles can affect the prediction of the thermal comfort index, emphasizing the importance of accurately considering clothing heat transfer coefficients for precise thermal comfort prediction.
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
(2021)
Article
Public, Environmental & Occupational Health
Mohamed Zemzem, Stephane Halle, Ludwig Vinches
Summary: This study evaluated the thermal insulation properties and air permeability of three technical textile assemblies and determined the influence of environmental parameters on their insulation capacity. The results showed that wind speed had the most significant impact on thermal performance, while temperature and humidity had limited influence. The findings highlight the importance of considering wind speed in evaluating textile fabrics' protective abilities, a parameter not currently accounted for in ISO 11092.
SAFETY AND HEALTH AT WORK
(2023)
Article
Construction & Building Technology
Wonseok Oh, Ryozo Ooka, Junta Nakano, Hideki Kikumoto, Osamu Ogawa
Summary: A proposed environmental index considering additional heat loss caused by mist wettedness helps in accurately assessing the thermal effects of a water-misting environment. The two-node model successfully predicted skin temperature in the water-misting environment, leading to an overall decrease in temperature due to mist wettedness compared to the existing standard effective temperature. Evaluating the water-misting environment with only basic parameters may underestimate the cooling effect, highlighting the importance of the proposed environmental index.
BUILDING AND ENVIRONMENT
(2021)
Article
Biophysics
Shan Gao, Ryozo Ooka, Wonseok Oh
Summary: The study found that the convective and radiative heat transfer coefficients of different clothing ensembles can affect the prediction of the thermal comfort index, emphasizing the importance of accurately considering clothing heat transfer coefficients for precise thermal comfort prediction.
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
(2021)
Article
Construction & Building Technology
Mengtao Han, Ryozo Ooka, Hideki Kikumoto, Wonseok Oh, Yunchen Bu, Shuyuan Hu
Summary: This study measured airflow velocity of human coughs using high-frequency PIV technology to provide a detailed validation database for further research on the impact of cough airflow on virus transmission. It found differences in cough characteristics between males and females, as well as variations in average velocity and cough spread angles.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Wonseok Oh, Ryozo Ooka, Hideki Kikumoto, Mengtao Han
Summary: In this study, the boundary conditions for simulating cough airflow using computational fluid dynamics (CFD) were defined and validated using experimental data. The obtained boundary conditions can be used to investigate the risk of infection and transmission routes of human cough.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Mengtao Han, Ryozo Ooka, Hideki Kikumoto, Wonseok Oh, Yunchen Bu, Shuyuan Hu
Summary: The study found significant differences in airflow velocity and spread angles between sneezing and speaking, with sneezing having longer duration and higher velocity, while speaking had a smaller average velocity. The differences in airflow features between genders were minor.
BUILDING AND ENVIRONMENT
(2021)
Review
Construction & Building Technology
Yunchen Bu, Ryozo Ooka, Hideki Kikumoto, Wonseok Oh
Summary: This study reviews recent research on expiratory particles and flow characteristics, with a focus on different respiratory activities, to guide the reduction of viral infection risk in built environments. Airborne transmission is a significant route of viral transmission, impacted by relative humidity and temperature. Future research and control strategies are needed to better predict infection potential and enhance indoor viral infection control.
SUSTAINABLE CITIES AND SOCIETY
(2021)
Article
Environmental Sciences
Shan Lu, Wonseok Oh, Ryozo Ooka, Lijun Wang
Summary: This study investigates the impact of environmental features of small public urban green spaces (SPUGS) on the mental restoration of older adults in Tokyo. The results show that factors such as green view index, boundary enclosure, and colorfulness have significant effects on mental restoration and vitality. Avoidance of large water areas and consideration of physiological equivalent temperature (PET) in autumn are recommended. These findings can inform the design of SPUGS in high-density Asian countries to promote the mental health of older adults.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Review
Construction & Building Technology
Wenchao Wang, Ryozo Ooka, Hideki Kikumoto, Wonseok Oh, Mengtao Han
Summary: Pollen particles enter indoor areas through various routes, negatively affecting indoor air quality and human health. Factors such as pollen type, ventilation, indoor ornamental plants, and human activities significantly influence the indoor/outdoor pollen concentration (I/O) ratio. The I/O ratio mainly ranges from 0 to 0.5, with higher values observed for pollen with diameters of 15-30 μm. Factors like window orientation and size, as well as human activity, can increase the I/O ratio. This review provides insights into the current research on pollen I/O ratios and suggests future research directions.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Wonseok Oh, Ryozo Ooka, Hideki Kikumoto, Mengtao Han
Summary: This study provides important fundamental boundary conditions, validated by experimental results, for computational fluid dynamics analysis to interpret the spread of infectious particles by sneezing. The results show that the maximum velocity of sneeze airflow is higher than coughing, and the overall volume of sneeze airflow is relatively low.
Article
Engineering, Chemical
Wonseok Oh, Ryozo Ooka, Hideki Kikumoto, Sihwan Lee
Summary: This study used numerical simulation to investigate the risk of disease transmission through cough-induced particles and analyzed the effects of ventilation rates and social distancing. The results showed that appropriate ventilation rates and social distancing can effectively reduce the transmission and inhalation risk of particles. Larger particles are more likely to deposit on surfaces, highlighting the need for regular disinfection.
AEROSOL SCIENCE AND TECHNOLOGY
(2023)
Article
Construction & Building Technology
Shan Gao, Ryozo Ooka, Wonseok Oh
Summary: Development of multi-node thermoregulation models with local clothing insulation as an input parameter enables distinguishing spatial and temporal changes in the thermal environment. However, research on local clothing insulation lags compared with multi-node thermoregulation models, affecting prediction accuracy. This study determined overall and local intrinsic clothing insulation values using different methods and found that methods and posture affect both overall and local intrinsic clothing insulation.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Wenchao Wang, Ryozo Ooka, Hideki Kikumoto, Wonseok Oh, Mengtao Han
Summary: This study investigated the impact of pollen diameter and shape on the indoor invasion ratio during off-peak and peak pollen periods. The results showed that pollen with a diameter over 40 μm and ruptured shape had higher indoor invasion ratios. The most abundant pollen types indoors were Corynespora during the off-peak period and Japanese cedar during the peak period.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Parth Bansal, Steven Jige Quan
Summary: This study investigates the relationship between urban form and canopy layer urban heat island (CUHI) using a relatively large sample of microclimate sensors in Seoul, Korea. The study compares different statistical models and finds that the spatially explicit gradient boosting decision tree (GBDT) model has the highest accuracy. The study also shows that the effect of urban form on CUHI varies at different time instances during the day. These findings provide valuable insights for planners to understand the complexity of urban climate and reduce CUHI magnitude.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Miaomiao Liu, Salah Almazmumi, Pinlu Cao, Carlos Jimenez-bescos, John Kaiser Calautit
Summary: Windcatchers provide effective low-energy ventilation and summer passive cooling in temperate climates. However, their use in winter is limited due to significant ventilation heat loss and potential discomfort. This study evaluates the applicability of windcatchers in low-temperature conditions, highlighting the need for control strategies to reduce over-ventilation and the integration of heat recovery or thermal storage to enhance winter thermal conditions.
BUILDING AND ENVIRONMENT
(2024)
Review
Construction & Building Technology
Behrouz Nourozi, Aneta Wierzbicka, Runming Yao, Sasan Sadrizadeh
Summary: This article presents a systematic review of ventilation solutions in hospital wards, aiming to enhance pathogen removal performance while maintaining patient and healthcare staff comfort using air-cleaning techniques. The study reveals the importance of proper ventilation systems in reducing infection risk and adverse effects of cross-contamination.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhen Yang, Weirong Zhang, Hongkai Liu, Weijia Zhang, Mingyuan Qin
Summary: The study examines the influence of personalized local heating on the thermal comfort of occupants in old residential buildings. The findings reveal that personalized local heating can increase the overall thermal sensation of occupants, but only a few methods are effective in enhancing thermal comfort. The chosen heating methods and background temperature affect the participants' selection of heating parts.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Hong Cheng, Dan Norback, Huilin Zhang, Liu Yang, Baizhan Li, Yinping Zhang, Zhuohui Zhao, Qihong Deng, Chen Huang, Xu Yang, Chan Lu, Hua Qian, Tingting Wang, Ling Zhang, Wei Yu, Juan Wang, Xin Zhang
Summary: The home environment and sick building syndrome (SBS) symptoms in five southern Chinese cities have been studied over time. The study found a decrease in asthma prevalence and an increase in allergic rhinitis. Cockroaches, rats, mice, mosquitoes or flies were identified as consistent biological risk factors for SBS symptoms, while redecoration, buying new furniture, and traffic air pollution were identified as other risk factors.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Chaojie Xing, Zhengtao Ai, Zhiwei Liu, Cheuk Ming Mak, Hai Ming Wong
Summary: This study experimentally investigated the emission characteristics of droplets around the mouth during dental treatments. The results showed that the peak mass fraction of droplets occurs within the size range of 20 μm to 100 μm, and droplets with a diameter less than 200 μm account for over 80% of the mass fraction. The dominant emission direction of droplets is towards the dummy's head and chest, forming an approximately cone shape.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhijian Liu, Zhe Han, Lina Hu, Chenxing Hu, Rui Rong
Summary: This study compared the effects of different respiratory behaviors on the distribution of aerosols in a ward and the risk of infection for healthcare workers using numerical simulation. It was found that talking in the ward significantly increased aerosol concentrations, particularly short periods of talking. Wards designed with side-supply ventilation had lower overall infection risk. Talking alternately between healthcare workers and patients slightly extended the impact time of aerosols.
BUILDING AND ENVIRONMENT
(2024)
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
Yan Bai, Liang Liu, Kai Liu, Shuai Yu, Yifan Shen, Di Sun
Summary: This study developed a non-intrusive personal thermal comfort model using machine learning techniques combined with infrared facial recognition. The results showed that the ensemble learning models perform better than traditional models, and the broad learning model has a higher prediction precision with lower computational complexity and faster training speed compared to deep neural networks. The findings provide a reference for optimizing building thermal environments.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yue Lei, Zeynep Duygu Tekler, Sicheng Zhan, Clayton Miller, Adrian Chong
Summary: Mixed-mode ventilation is a promising solution for achieving energy-efficient and comfortable indoor environments. This study found that occupants can thermally adapt when switching between natural ventilation (NV) and air-conditioning (AC) modes within the same day, with the adaptation process stabilizing between 35 to 45 minutes after the mode switch. These findings are important for optimizing thermal comfort in mixed-mode controls, considering the dynamic nature of thermal adaptation.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Nan Mo, Jie Han, Yingde Yin, Yelin Zhang
Summary: This study develops a method based on the LCZ framework for a comprehensive evaluation of urban-scale heat island effects, considering the impact of geographic factors on LST. The results show that Guilin's geomorphological conditions lead to abnormal heat island effects during winter, and the cooling effects of mountains and water bodies vary seasonally in different built areas, with LCZ 2 exhibiting the strongest cooling effect.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Tunga Salthammer
Summary: Monitoring the potential formaldehyde emission of wood-based materials through test chamber investigations has significantly contributed to reducing indoor formaldehyde concentrations. However, the different methodologies used in these procedures prevent direct result comparison. Empirical models for converting formaldehyde steady-state concentrations based on temperature, humidity, air change rate, and loading were developed in the 1970s and have been modified to accommodate the development of lower-emitting materials. Formaldehyde emissions from wood-based materials are complex and require nonlinear regression tools for mathematical analysis.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Katarina Stebelova, Katarina Kovacova, Zuzana Dzirbikova, Peter Hanuliak, Tomas Bacigal, Peter Hartman, Andrea Vargova, Jozef Hraska
Summary: This study investigated the impact of reduced short-wavelength light on the hormone melatonin metabolite 6-sulfatoxymelatonin (u-sMEL) and examined the association between previous day's light exposure and u-sMEL. It was found that reducing short-wavelength light during the day did not change the concentration of u-sMEL. Personal photopic illuminance was positively correlated with u-sMEL in the reference week. The illuminance had a significant impact on u-sMEL, as shown by the evaluation of the mean of all three urine samples. However, this correlation was not found in the experimental week.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Ruoxin Xiong, Ying Shi, Haoming Jing, Wei Liang, Yorie Nakahira, Pingbo Tang
Summary: This study proposes a data-model integration method to identify and calibrate uncertainties in machine learning models, leading to improved thermal perception predictions. The method utilizes the Multidimensional Association Rule Mining algorithm to identify biased human responses and enhances prediction accuracy and reliability. The study also evaluates different calibration techniques and discovers their potential in enhancing prediction reliability.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Beichao Hu, Zeda Yin, Abderrachid Hamrani, Arturo Leon, Dwayne McDaniel
Summary: This paper introduces an innovative super-resolution approach to model the air flow and temperature field in the cold aisle of a data center. The proposed method reconstructs a high-fidelity flow field by using a low-fidelity flow field, significantly reducing the computational time and enabling real-time prediction.
BUILDING AND ENVIRONMENT
(2024)
