{"title":"Effects of classroom design characteristics on children's physiological and psychological responses: A virtual reality experiment","authors":"Xue Meng , Mingxin Zhang","doi":"10.1016/j.buildenv.2024.112274","DOIUrl":"10.1016/j.buildenv.2024.112274","url":null,"abstract":"<div><div>There is growing concern about the health effects of school classroom environments, where children spend long periods of time. However, little is known about the impact of multiple design features on children. This study used a virtual reality experimental approach to investigate the effects of classroom design characteristics on children's physiological and psychological outcomes. Ninety-six school-aged children (aged 10–14 years) experienced classroom environments using virtual reality technology and the restorative effects of seven design characteristics in different combinations were tested. The children's stress, attention, mood, and restoration were measured using physiological indicators and questionnaires during and after the experience. The results showed that six design characteristics had a significant effect on children: indoor plants, window views, seating arrangements, window areas, wall decorations, and wall and furniture colors. The effects and strengths of the different design characteristics varied. However, spatial density did not appear to have any effect. The results also revealed significant differences in cognitive and emotional perceptions according to gender and age. The need for future longitudinal experiments with long-term, real-life scenarios is discussed. The research findings can inform evidence-based design, guidelines, and standards for healthy school environments.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"267 ","pages":"Article 112274"},"PeriodicalIF":7.1,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142698716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hao Xie , Hengmin Jia , Jie Ji , Yu Qian , Hongju Meng , Jiyao Li , Yan Mu
{"title":"Development and experimental validation of a thermal inactivation model for airborne bacteria and its application in Trombe wall systems","authors":"Hao Xie , Hengmin Jia , Jie Ji , Yu Qian , Hongju Meng , Jiyao Li , Yan Mu","doi":"10.1016/j.buildenv.2024.112341","DOIUrl":"10.1016/j.buildenv.2024.112341","url":null,"abstract":"<div><div>Thermal inactivation technology is an effective and safe method to control indoor bioaerosols. A predictive mathematical model describing the effect of residence time and exposure temperature on the thermal inactivation process of <em>Klebsiella pneumoniae</em> (<em>K. pneumoniae</em>), <em>Escherichia coli</em> (<em>E. coli</em>) and <em>Staphylococcus aureus</em> (<em>S. aureus</em>) in aerosol was developed. A continuous flow experimental system was set up to determine the survival ratio of bioaerosols under the wall temperature of 45–120 °C and residence time of 1.5–12 s. The experimental results showed that the thermal stability in the order from high to low was <em>S. aureus</em> > <em>K. pneumoniae</em> > <em>E. coli</em>. The inactivation model was developed based on the first-order kinetic model and Arrhenius equation and the model parameters were identified through particle swarm optimization (PSO) algorithm with the input of time-dependent exposure temperature calculated by computational fluid dynamics (CFD). The survival ratio calculated by the present model corresponded well with that observed in the experiment, with root mean square error (RMSE) being 0.0445, 0.0433 and 0.0376 for <em>K. pneumoniae, E. coli</em> and <em>S. aureus</em>, respectively. Based on the heat and mass transfer model for Trombe wall, it was found that solar-driven thermal inactivation could reduce the indoor bacterial concentration by up to 57 % for <em>E. coli</em> with thermal efficiency being 0.424 under solar irradiance of 496 W/m<sup>2</sup> and ambient temperature of 12.8 °C. In this way, solar driven thermal inactivation is a promising and sustainable method to deal with indoor bioaerosols.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112341"},"PeriodicalIF":7.1,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuxin Yang , Zhaojun Wang , Fanzhuo Zhou , Juan Yu , Chang Liu
{"title":"Effects of thermal histories on human thermal adaptation to district heating environments: A cross-sectional investigation in the severe cold zone, China","authors":"Yuxin Yang , Zhaojun Wang , Fanzhuo Zhou , Juan Yu , Chang Liu","doi":"10.1016/j.buildenv.2024.112335","DOIUrl":"10.1016/j.buildenv.2024.112335","url":null,"abstract":"<div><div>Understanding personalized thermal comfort is critical for creating comfortable indoor environments and achieving energy efficiency. Thermal history has a significant impact on human thermal adaptation, but it has received insufficient attention. Combining field investigation and statistical analysis, this study introduces the thermal neutral rate (TNR) and thermal comfort and acceptability rate (TCAR) to analyze the differences in thermal and humidity responses and adaptability among groups with different thermal histories in northern China. Results show that as subjects acclimatize to indoor environments, their thermal neutral temperature rises, and humid sensation votes approach 'neutral' conditions. Participants with no prior northern thermal history require up to 1 year to adapt to district heating environments, while adaptation to humid environments may take 2–3 years. The thermal neutral temperature of the un-adapted subjects was 18.0 °C, and post-adaptation, it varied within the range of 20.2–21.4 °C. For engineers designing indoor environments, maintaining temperatures within the range of 19.1–22.3 °C meets the comfort and acceptability requirements of participants with different thermal histories in the office. These findings provide evidence for understanding human thermal adaptation mechanisms and give recommended heating temperature ranges for comfortable indoor environments in office buildings in the severe cold zone.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112335"},"PeriodicalIF":7.1,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chengxi Yao , Seungjae Lee , Xiaojiang Wen , Jaewon Lee , Seokchan Lee , Seulgi Choi , Dongbin Huh , Taesung Kim
{"title":"A numerical study on effective arrangement of fan-filter units in a semiconductor cleanroom: Control of hazardous gas leakage from a process instrument","authors":"Chengxi Yao , Seungjae Lee , Xiaojiang Wen , Jaewon Lee , Seokchan Lee , Seulgi Choi , Dongbin Huh , Taesung Kim","doi":"10.1016/j.buildenv.2024.112301","DOIUrl":"10.1016/j.buildenv.2024.112301","url":null,"abstract":"<div><div>Contamination control in cleanrooms is essential for maintaining high productivity across various industries. In semiconductor manufacturing environments, hazardous gas leaks from instruments can pose serious health risks to operators, especially during the preventive maintenance. In this study, the numerical simulations were performed to evaluate and optimize the fan filter unit (FFU) arrangement in a cleanroom, aiming to effectively manage hazardous hydrogen chloride (HCl) gas leakage during semiconductor instrument maintenance. To reflect the actual situation, the study incorporates leakage conditions from a reference, considering various thermal factors. The simulation results indicate that the FFU arrangement and coverage rate, which influence internal airflow under a fixed air change rate (ACH), are critical for hazardous leakage control during preventive maintenance. A quantitative and comprehensive analysis of the accumulation of leaked gas on the operator and instrument surfaces showed that the analysis score proposed in this research on the horizontal FFU array with 30% coverage was 0.44, which is minimum among different cases, indicating the best performance on controlling dispersion behaviour of the hazardous gas in the cleanroom during the preventive maintenance.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"267 ","pages":"Article 112301"},"PeriodicalIF":7.1,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142700539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Fanzhuo Zhou , Zhaojun Wang , Yuxin Yang , Chang Liu , Jia Zhao
{"title":"Field study on effect of large temperature steps on thermal comfort and physiological response in severe cold climate","authors":"Fanzhuo Zhou , Zhaojun Wang , Yuxin Yang , Chang Liu , Jia Zhao","doi":"10.1016/j.buildenv.2024.112338","DOIUrl":"10.1016/j.buildenv.2024.112338","url":null,"abstract":"<div><div>Big environmental difference between the artificial indoor environments and the outdoor environments affects human comfort and physiological responses. This study examines the dynamic changes in human psychological and thermal responses to sudden, large temperature differences under three indoor conditions: slightly warm, neutral, and slightly cold. The similarities and differences between field studies and existing laboratory research were also analyzed.</div><div>The results indicated that the indoor-outdoor temperature differences under slightly cold, neutral, and slightly warm conditions were 24.5 °C, 32.6 °C, and 39 °C. Environmental differences between indoor and outdoor conditions were influenced by various factors, including temperature, air speed and so on. Human thermal responses differed significantly among the three conditions (<em>P</em> < 0.01). Thermal sensation vote (TSV), thermal comfort vote (TCV), and skin temperature showed great changes after the environmental shift. Skin temperature fluctuated more during down-step, while heart rate and heart rate variability (HRV) exhibited greater changes during up-step in this test. In real-world scenarios, human thermal responses were influenced by temperature, air speed, and human behavior, resulting in deviations from laboratory findings. Furthermore, a time-dependent model for skin temperature and TSV was developed, revealing that thermal sensation changes more rapidly than skin temperature during abrupt shifts from cold to near-neutral environments.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112338"},"PeriodicalIF":7.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Patrick James , Yu Gao , Michael Chater , Azadeh Montazami , Stephanie Gauthier , Phillip Turner , Victoria Aragon , Despoina Teli , Trinabh Mittal , Massimiliano Manfren
{"title":"Preliminary findings of storytelling in schools as a pre-heatwave intervention to enhance children's behaviour to improve thermal comfort","authors":"Patrick James , Yu Gao , Michael Chater , Azadeh Montazami , Stephanie Gauthier , Phillip Turner , Victoria Aragon , Despoina Teli , Trinabh Mittal , Massimiliano Manfren","doi":"10.1016/j.buildenv.2024.112337","DOIUrl":"10.1016/j.buildenv.2024.112337","url":null,"abstract":"<div><div>Younger schoolchildren in particular are at risk of overheating in school due to two key factors. Firstly, children have a preference for lower temperatures than adults, and yet schools are designed and operated using adult thermal preference guidance. Secondly, younger schoolchildren often lack the confidence to change their behaviour in a school setting (remove a jumper, more away from direct sunlight, drink more water etc.) without prompting from the teacher. This paper reports a pilot study of a storytelling approach to enable schoolchildren to enhance their behaviour to improve their thermal comfort. A control: intervention study was undertaken across eight classes, in two schools in Hampshire, UK, with KS1 (national curriculum Key Stage 1, age 6–7) and KS2 (Key Stage 2 age 7–9) children. A new story, “The Hottest Day at School” was developed, where actions to improve thermal comfort were introduced, read by the teacher to children of intervention classes prior to a heatwave. The thermally influenced actions and feelings of schoolchildren were assessed during the heatwave event via a sticker log activity which each child completed. Fisher's exact and Pearson's chi-squared tests indicate statistically significant differences in the actions of KS1 children in particular. Whilst acknowledging the preliminary nature of the findings, the paper suggests that the storytelling approach does enable children to adapt their behaviour to enhance thermal comfort.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112337"},"PeriodicalIF":7.1,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Resource-efficient design of integrated personal exhaust ventilation and physical barriers for airborne transmission mitigation: A numerical and experimental evaluation","authors":"Seyedkeivan Nateghi , Shahrzad Marashian , Jan Kaczmarczyk , Sasan Sadrizadeh","doi":"10.1016/j.buildenv.2024.112336","DOIUrl":"10.1016/j.buildenv.2024.112336","url":null,"abstract":"<div><div>This study investigates the performance of integrated personal exhaust ventilation and physical barriers in mitigating airborne transmission, addressing the critical need for effective infection control in indoor environments. Using computational fluid dynamics, we modeled aerosol dispersion in a test room and validated these results with experimental data. Experimental validation strengthened the computational findings by providing empirical evidence for system efficacy under varying airflow conditions. We examined various prevention levels, including no prevention measures, only physical barriers, and physical barriers integrated with personal exhaust ventilation. The designed system with a barrier height of 65 cm and a personal exhaust flow rate of 9 L/s per person demonstrated strong efficacy in mitigating airborne transmission. Further numerical analysis was conducted to evaluate the impact of critical parameters, including barrier height and exhaust flow rate, on the aerosol removal efficiency of the integrated system. Results indicate that reducing the barrier height to 45 cm and the exhaust flow rate to 6 L/s per person retains 95% of aerosol removal efficiency, offering the most cost-effective and sustainable design without compromising system's performance in limiting airborne transmission. These findings suggest that moderate adjustments can enhance system sustainability by enabling significant material and energy savings.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112336"},"PeriodicalIF":7.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yubo Bi , Yunbo Wang , Shilu Wang , Jihao Shi , Chuntao Zhang , Shenshi Huang , Wei Gao , Mingshu Bi
{"title":"A hybrid expert neural network for predicting hydrogen concentration under the ceiling in underground garage","authors":"Yubo Bi , Yunbo Wang , Shilu Wang , Jihao Shi , Chuntao Zhang , Shenshi Huang , Wei Gao , Mingshu Bi","doi":"10.1016/j.buildenv.2024.112325","DOIUrl":"10.1016/j.buildenv.2024.112325","url":null,"abstract":"<div><div>In the event of a hydrogen leak, the build-up of hydrogen near the ceiling of an underground garage poses a significant safety risk. Fast and accurate estimation of hydrogen concentration distribution is crucial for risk assessment. This study proposes a novel neural network named multi-expert variational hybrid network (MEVHN) to predict the distribution of hydrogen concentration under the ceiling when the peak concentration reaches its maximum value during a leakage event. The model utilizes data from discrete sensors to make predictions. It incorporates a mixture of experts (MoE) framework to transform the sensor data into latent variables, which are then used by a variational auto-encoders (VAE) decoder to predict the hydrogen concentration distribution. Constraints are added to the loss function to improve the prediction accuracy further. The results show that the MEVHN has an inference time of 1.3 seconds, a coefficient of determination (R²) of 0.977, a mean absolute error (MAE) of 1.86E-3, and a mean squared error (MSE) of 3.15E-5. These results indicate that the model performs well in predicting the 2D hydrogen concentration distribution.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112325"},"PeriodicalIF":7.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Energy-flexibility strategy for residential blocks with multiple morphologies based on energy, economy, and carbon reduction performance","authors":"Haida Tang , Yuqin Wang , Chunying Li","doi":"10.1016/j.buildenv.2024.112333","DOIUrl":"10.1016/j.buildenv.2024.112333","url":null,"abstract":"<div><div>Incorporating energy-flexibility strategies into urban blocks can yield substantial benefits in terms of energy efficiency, economic viability, and carbon emission reduction. This study proposes an energy-flexibility strategy aimed at enhancing the energy and economic performance of a residential building system that integrates photovoltaics power generation, electric vehicles charging, and battery energy storage system. Simulation models were developed to comprehensively evaluate the performance of this strategy in residential blocks with different morphologies in Shenzhen, China. Simulation results indicate that the energy-flexibility strategy can reduce the average annual grid energy consumption of the block by 41.6% for multi-story buildings, 22.6% for small high-rise buildings, and 12.5% for high-rise buildings compared to the benchmark system. The average levelized cost of electricity over the entire lifecycle is 67.1%, 40.5%, and 29.7% lower than that of the benchmark system for multi-story, small high-rise, and high-rise buildings, respectively. The average peak-time grid flexibility factors for multi-story, small high-rise, and high-rise blocks reach 0.01, 0.17, and 0.35, significantly reducing the net grid power inflow during peak electricity demand periods. The total carbon emissions over the lifecycle can be reduced by 11.8% to 67.7%, with particularly notable carbon reduction benefits observed in multi-story blocks. Compared to traditional building-attached photovoltaics systems, blocks employing the energy-flexibility strategy achieve remarkable economic benefits and peak-shaving advantages, albeit at the cost of slightly higher grid power inflow and carbon emission.</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112333"},"PeriodicalIF":7.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huabo Wu , Yulin Li , Jie Ji , Niansi Li , Bendong Yu
{"title":"Field test and energy analysis on the application of thermal catalytic technology in wood buildings for contributing zero carbon buildings","authors":"Huabo Wu , Yulin Li , Jie Ji , Niansi Li , Bendong Yu","doi":"10.1016/j.buildenv.2024.112334","DOIUrl":"10.1016/j.buildenv.2024.112334","url":null,"abstract":"<div><div>Wood buildings, with their exceptional carbon sequestration capabilities, show immense potential in achieving carbon neutrality. However, the volatile organic compounds (VOCs) emitted from these structures pose significant health risks. To address this issue, this paper proposed an innovative thermal catalytic Trombe wall (TC-T-Wall), designed with architectural aesthetics in mind. Experiments were conducted on a wood building equipped with the TC-T-Wall to evaluate its thermal performance and air purification efficiency. Heat and mass transfer models were developed and validated, and the system's performance was analyzed under varying TC-T-Wall areas. Additionally, energy consumption in wood buildings with TC-T-Wall was examined in different regions. Key findings were as follows: (1) Experimental results showed that the indoor temperature of the wood building increased from 18 °C to 41 °C, and formaldehyde concentration dropped from 1.826 ppm to zero within three hours. (2) As the TC-T-Wall area increased, the formaldehyde degradation rate rose from 67% to 93%, and the total volume of clean air produced increased from 112.89 m<sup>3</sup> to 309.88 m<sup>3</sup>. (3) Energy consumption analysis across different regions revealed that the TC-T-Wall system performed especially well in Nanjing. In January, energy consumption was reduced by 53.69%, and in July by 19.11%, with the system producing 9,212 m<sup>3</sup> of clean air in January and 7,259 m<sup>3</sup> in July</div></div>","PeriodicalId":9273,"journal":{"name":"Building and Environment","volume":"268 ","pages":"Article 112334"},"PeriodicalIF":7.1,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}