Article
Thermodynamics
Nan Zhang, Bin Cao, Yingxin Zhu
Summary: The thermal environment plays a crucial role in sleep quality, and the microenvironment of the bed is more important than the ambient environment. This research aimed to establish an effective method to determine the insulation of bedding systems. A thermal manikin was used to measure the insulation, and various quilts were tested. A total of 64 bedding systems were tested to develop the evaluation method. The research provides a valuable tool for thermal comfort research and HVAC system design.
BUILDING SIMULATION
(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
Yehu Lu, Mengmeng Niu, Wenfang Song, Yuping Liu, Min Wang
Summary: The study found that bedding systems with down filling have higher total thermal insulation; total thermal insulation increases nonlinearly with filling weight; the highest total thermal insulation was measured in crouching sleeping posture.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Jiantao Lin, Yuhang Kong, Lei Zhong
Summary: This study proposes an environmental control system for narrow sleeping spaces with multiple occupants and uses numerical simulations for design and optimization. The optimized results show that all indexes meet the requirements and the energy consumption is low.
ENERGY AND BUILDINGS
(2022)
Article
Construction & Building Technology
T. W. Tsang, K. W. Mui, L. T. Wong
Summary: The study found that thermal comfort and satisfaction can influence university students' sleep quality, with females possibly choosing bedding with higher total thermal resistance in the same thermal conditions. Sleep quality is mainly influenced by thermal comfort and satisfaction, with thermally satisfied individuals and those with neutral thermal sensation having better sleep quality.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Shujie Yan, Jing Xiong, Jungsoo Kim, Richard de Dear
Summary: This study proposes a method to assess sleeping thermal environment by modifying and converting an existing model, which has been validated through practical application. The research findings provide guidance for developing optimal bedroom temperature control strategies to enhance sleep thermal comfort.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Sishi Li, Yue Deng, Bin Cao
Summary: Cold protection is crucial for outdoor workers in winter. Personal heating is an effective measure to improve thermal comfort, but assessing different personal heating measures is difficult. This study explored four types of personal heating measures in different cold environments and measured their insulation and heating effectiveness.
Article
Materials Science, Textiles
Reannan Riedy, Meredith McQuerry
Summary: Motorsports drivers compete in high-speed races for several hours, facing temperatures of up to 50 degrees C inside the cockpit. While there have been efforts to improve car speed and safety, the comfort of the driver is often overlooked. Racing suits are required to meet certain thermal protection certification levels, but research on their impact on thermal comfort and heat stress is lacking. This study used a thermal manikin to analyze the thermal insulation, evaporative resistance, and total heat loss (THL) of different SFI certification levels of racing suits. The findings suggest that wearing a lower rated suit with base layers provides better thermal comfort than a higher rated suit without undergarments. Further research is needed to understand the effects of THL on the human body during racing conditions and establish a minimum THL benchmark for racing suits.
JOURNAL OF INDUSTRIAL TEXTILES
(2023)
Article
Thermodynamics
Qing Zheng, Hongbo Wang, Ying Ke
Summary: This study presents a mathematical model to evaluate the thermal insulation of a bedding system, considering both local and total values. The model was validated by comparing with experimental results and showed acceptable accuracy. The study also discusses the effects of different parameters on the thermal insulation and provides practical suggestions.
BUILDING SIMULATION
(2023)
Article
Construction & Building Technology
Zihan Wang, Bin Cao, Yingxin Zhu
Summary: This study investigates the characteristics of behavioral adjustments related to sleep thermal comfort in residential environments, analyzing how people adjust bedding systems in different indoor environments and exploring the effects of regional and personal factors on heating modes during sleep. The research finds weak correlation between thermal sensation during sleep and overnight bedroom air temperature, while bed temperature is not correlated with overnight bedroom air temperature.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Jingxian Xu, Yehu Lu, Lanjun Yin, Haibo Song
Summary: This study aimed to find the preferred thermal properties of sleeping bags for children and provide guidance for engineers and adults on dressing and choosing appropriate sleeping bags. Regression equations were proposed to establish the relationship between skin temperature and fabric thickness, thermal conductivity, and air temperature.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Ning Mao, Mengjie Song, Yingjie Xu
Summary: The study found that in sleeping state, human body heat balance is mainly affected by convective heat transfer and latent heat loss, with supply air temperature, flowrate, and humidity having different effects on heat loss.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Review
Green & Sustainable Science & Technology
Houda Ajabli, Amine Zoubir, Rabie Elotmani, Mohamed Louzazni, Khalid Kandoussi, Abdelmajid Daya
Summary: Since the 1930s, thermal comfort has been a crucial topic in the construction industry. The use of natural materials, including vegetal fibers or recycled waste products, is being explored to enhance thermal comfort in buildings. This study examines the origins and progression of thermal comfort concepts and evaluates the potential of integrating bio-based materials in building envelopes for maintaining thermal comfort. The findings suggest that alternative insulation materials made from unusual sources can compete with conventional materials and offer good thermal conductivity.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Thermodynamics
Aziza Hannouch, Charbel Habchi, Najib Metni, Thierry Lemenand
Summary: In this study, a new type of thermal manikin representing a preterm neonate was built using 3D printing technique. The control of surface temperature and the performance in different scenarios were investigated. The obtained results showed agreement with previous studies.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Biology
Fangying Yan, Qing Zheng, Ying Ke
Summary: Ambient temperature and the thermal resistance of bedding are crucial factors for sleepers' thermal comfort. Increasing the thermal resistance of duvets can widen the thermal comfort zone, and a recommended bed climate temperature of 30-33 degrees C can guarantee good sleep quality.
JOURNAL OF THERMAL BIOLOGY
(2023)
Article
Environmental Sciences
Wanyi Zhang, Shiming Deng, Yongxiang Wang, Zhongping Lin
AEROSOL AND AIR QUALITY RESEARCH
(2018)
Article
Energy & Fuels
Huaxia Yan, Yan Pan, Zhao Li, Shiming Deng
Article
Energy & Fuels
Wenjing Chen, Ming-yin Chan, Wenbing Weng, Huaxia Yan, Shiming Deng
Article
Energy & Fuels
Song Mengjie, Deng Shiming, Dang Chaobin, Mao Ning, Wang Zhihua
Article
Thermodynamics
Long Zhang, Yiqiang Jiang, Jiankai Dong, Yang Yao, Shiming Deng
APPLIED THERMAL ENGINEERING
(2018)
Review
Construction & Building Technology
Song Mengjie, Niu Fuxin, Mao Ning, Hu Yanxin, Deng Shiming
ENERGY AND BUILDINGS
(2018)
Article
Construction & Building Technology
Ning Mao, Bin Zhang, Mengjie Song, Shiming Deng
ENERGY AND BUILDINGS
(2018)
Article
Construction & Building Technology
Mengjie Song, Kai Wang, Shengchun Liu, Shiming Deng, Baomin Dai, Zhili Sun
ENERGY AND BUILDINGS
(2018)
Article
Thermodynamics
Jingdong Liu, Wei Wang, Yuying Sun, Shiming Deng
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2018)
Article
Thermodynamics
Caixia Wang, Shiming Deng, Jianlei Niu, Enshen Long
Article
Thermodynamics
Zhaoyang Li, Wei Wang, Yuying Sun, Shiquan Wang, Shiming Deng, Yao Lin
Summary: This paper presents a novel frost built-up detection method based on image recognition for improving the accuracy of defrosting initiation of air source heat pumps under frosting conditions. Experimental results show that the modified method can properly account for the impact of changing illuminance level on image recognition accuracy, ensuring accurate frost built-up detection.
Article
Thermodynamics
Yuying Sun, Xu Chen, Shangjiang Wu, Wenzhe Wei, Wei Wang, Shiming Deng
Summary: An adaptive control method for supply water temperature was proposed to improve the performance of ASHP units and reduce energy consumption. By predicting the optimal supply water temperature, the control method quickly and accurately adjusted the water temperature according to heating demand.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Shengnan Liu, Xiaoxia Bai, Long Zhang, Yao Lin, Shiming Deng, Wei Wang, Minchen Wei
Summary: This paper investigates the relationship between the frost suppression performance and total heating capacity of a variable speed ASHP unit. The study presents condensing-frosting performance maps obtained through experimental tests on different speed combinations of the compressor and outdoor air fan. The results show that changing the speeds of the unit affects both the outdoor coil surface temperature and the total output heating capacity. Higher outdoor coil surface temperature improves the frost suppression performance but may reduce the heating capacity.
APPLIED THERMAL ENGINEERING
(2022)
Proceedings Paper
Energy & Fuels
Deng Shiming, Du Jing
CLEANER ENERGY FOR CLEANER CITIES
(2018)
Article
Construction & Building Technology
Yudong Xia, Huaxia Yan, Shiming Deng, Ming-Yin Chan
BUILDING SERVICES ENGINEERING RESEARCH & TECHNOLOGY
(2018)
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)
