Article
Construction & Building Technology
Nikhil Singh Yaduvanshi, June Young Park
Summary: This research examines the impact of citizen involvement in residential building retrofits in the United States, focusing on single-family houses. The study highlights the importance of the residential sector in greenhouse gas emissions and the potential of energy retrofits to mitigate this impact. Through a comprehensive review of 66 retrofit programs and text mining on social media data, the research identifies various citizen involvement approaches and citizen perceptions of retrofit practices. The concept of Citizen Building Scientist is introduced to represent proactive and environmentally aware citizens who actively participate in and share knowledge for sustainable practices.
JOURNAL OF BUILDING ENGINEERING
(2023)
Review
Construction & Building Technology
Soheil Roumi, Fan Zhang, Rodney A. Stewart, Mattheos Santamouris
Summary: This paper provides a comprehensive review of 25 studies on the development of IEQ evaluation models in commercial buildings. The studies differentiate between objective and subjective measurement approaches, as well as three types of IEQ models. The analysis discusses five commonly used methods and evaluates the interaction effects and relative contributions of IEQ factors. The paper proposes five key criteria for developing quality IEQ models and presents a ranking and scoring system for their evaluation.
ENERGY AND BUILDINGS
(2022)
Article
Energy & Fuels
Marek Borowski, Rafal Luczak, Joanna Halibart, Klaudia Zwolinska, Michal Karch
Summary: HVAC systems in buildings contribute significantly to energy consumption, and incorrect design, selection, installation, operation, and maintenance can lead to increased energy consumption. Proper selection of HVAC solutions is crucial for maintaining indoor air quality and user comfort.
Article
Construction & Building Technology
Canjun Li, Han Zhu, Xiangchao Lian, Yuxin Liu, Xiaohan Li, Yanbo Feng
Summary: To achieve occupant-centric building and control, it is important to consider occupant behavior characteristics and develop operational strategies accordingly. By studying the time-lag of shading behavior, an advanced prediction model was proposed, improving prediction accuracy. Furthermore, an operational logic that meets energy savings and comfort requirements was derived by describing the dynamic distribution of office room occupancy.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Ehsan Mousavi, Arup Bhattacharya
Summary: This paper discusses the impact of indoor air quality on the productivity, efficiency, and well-being of occupants. It also addresses the challenge of designing a ventilation system in building construction. The proposed event-based modeling (EBM) approach can accurately simulate airflow patterns in realistic human-environment interactions, which current techniques are unable to handle.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Alessandra Luna-Navarro, Paul Fidler, Alistair Law, Santiago Torres, Mauro Overend
Summary: This paper introduces a prototype IoT system, BIT, for capturing the holistic and transient influence of fa?ades on IEQ and occupants, successfully deployed in a real-world office for 9 months with room for improvement, particularly in increasing occupant engagement.
BUILDING AND ENVIRONMENT
(2021)
Article
Environmental Studies
Shelby N. Ruiz, Julia K. Day, Krissy Govertsen, Michael Kane
Summary: As technology advances, occupant behavior plays a significant role in preventing building operators from achieving performance goals. Occupant-centric control (OCC) is suggested as a means to incorporate occupants while reducing negative impacts on building performance. This paper presents findings from a qualitative study, highlighting the role of operators in OCC and the impact of the operator-occupant relationship on building operation. It identifies factors influencing relationship quality and proposes solutions to improve these relationships.
ENERGY RESEARCH & SOCIAL SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Arezoo Shirazi, Sidney Newton, Pernille H. Christensen
Summary: Australia's building energy use is a significant contributor to energy consumption and greenhouse gas emissions. Smart and sustainable building management practices can improve efficiency and sustainability. This study examined the energy consumption and management of a university building in Sydney, Australia, using mobile phone applications and portable sensors.
Article
Engineering, Multidisciplinary
M. N. Uddin, Q. Wang, Hsi Hsien Wei, Hung Lin Chi, Meng Ni
Summary: This study introduces a new framework for automatic assessment of occupants' comfort and building indoor performance using BIM and the SD-ABM platform. The framework is able to predict occupant presence, comfort level, temperatures, and CO2 concentration in office spaces. Further research is needed to assess the efficiency of the framework.
AIN SHAMS ENGINEERING JOURNAL
(2021)
Article
Construction & Building Technology
Angela Sanguinetti, Sarah Outcault, Theresa Pistochini, Madison Hoffacker
Summary: This research explores the perception of teachers on indoor environmental quality (IEQ) in relation to actual monitored data. The findings indicate that teachers' perception of ventilation is not accurate, and those in classrooms with poorer ventilation were more satisfied with IEQ. Errors in HVAC system installation and programming contributed to misunderstandings. CO2 monitoring and teacher education are crucial for creating a safe classroom environment.
Review
Green & Sustainable Science & Technology
Amir Faraji, Maria Rashidi, Fatemeh Rezaei, Payam Rahnamayiezekavat
Summary: Occupant comfort is crucial in building design, and there is a growing interest in this area. This study provides a comprehensive review of occupant comfort in buildings, emphasizing its impact on lifestyle, health, and productivity. The review reveals that comfort models used in research are often based on experimental studies and may not fully reflect user preferences.
Article
Environmental Sciences
Maohui Luo, Yumeng Hong, Jovan Pantelic
Summary: This study developed a potential index for natural ventilation based on indoor and outdoor environmental factors, and found that the actual window opening time was significantly lower than the potential availability. The results indicated that the behavior of keeping windows open or closed was the key limiting factor in utilizing the potential of natural ventilation.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2021)
Article
Economics
Simon Moeller, Amelie Bauer
Summary: Insulation and sealing of building envelopes are effective strategies to improve energy efficiency and reduce energy consumption. However, these measures may also result in energy performance gaps, where actual consumption exceeds calculated demand. The interactions between occupants and buildings play a crucial role in contributing to these gaps, leading to unintended negative consequences for energy consumption.
Article
Construction & Building Technology
Ahmed Benabed, Amir Boulbair
Summary: A numerical investigation using Ansys Fluent software is conducted to study the flow pattern, thermal comfort, and air freshness in a ventilated office room. The study finds that lobed inserts have a significant effect on reducing thermal dissatisfactions and airflow rates, but may slightly reduce air freshness.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Yuxin Wu, Panu Mustakallio, Risto Kosonen, Tuomas Kaukola, Jingdong Chen, Hong Liu, Baizhan Li
Summary: This study experimentally investigated airflow patterns, ventilation performance, and local thermal comfort in mock-up meeting and office rooms with a variable air volume (VAV) system, comparing the Active Diffuser with commonly used diffusers. Results showed that the Active Diffuser provided more uniform and stable airflow distribution under VAV, making it recommended for applications with significant heat gain variations.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Jing Xiong, Sarah Carter, Ollie Jay, Edward Arens, Hui Zhang, Max Deuble, Richard de Dear
Summary: A field study conducted in office settings in Sydney found that female office workers aged over 40 or 50 or younger perceived warmer sensations and preferred cooler thermal environments. Women in the perimenopausal age range expressed higher thermal dissatisfaction compared to a reference group, potentially due to menopausal symptoms impacting their thermoregulatory system.
Article
Construction & Building Technology
Ricardo Forgiarini Rupp, Thomas Parkinson, Jungsoo Kim, Jorn Toftum, Richard de Dear
Summary: Occupants' thermal sensitivity affects comfort temperature and adaptive comfort models, and varies according to building ventilation type and geographic region.
BUILDING AND ENVIRONMENT
(2022)
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 compares indoor thermal environment and thermal comfort between radiant and convective systems in continuous operating mode. The analysis includes hypothesis tests on thermal environment parameters and human subjective responses. The results show evidence of overheating in radiant systems during heating season, but no practical difference in air temperature between the two systems during cooling season. The study also analyzes and compares different indexes, finding little practical difference in thermal comfort vote between the two systems at the same PMV interval. The findings provide insights for thermal environment design and thermal comfort evaluation under different HVAC systems.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Xiaowen Su, Zhaojun Wang, Fanzhuo Zhou, Lin Duanmu, Yongchao Zhai, Zhiwei Lian, Bin Cao, Yufeng Zhang, Xiang Zhou, Jingchao Xie
Summary: This study discusses the clothing insulation and thermal adaptation of occupants in cold climates based on the Chinese Thermal Comfort Database. The research reveals that clothing behavior is more correlated with indoor air temperature and establishes a model explaining the interaction between individuals' clothing behavior and indoor air temperature, providing support for indoor environmental design.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Yu Dong, Yuan Shi, Yanfeng Liu, Richard Forgiarini Rupp, Jorn Toftum
Summary: The study found that the difference in thermal exposure level between migrants' original and current residence is more important for promoting cold adaptation development than heat adaptation. The thermal sensitivity and comfortable temperature of migrants vary depending on their origin and migration time, with psychological adaptation dominating in southern migrants and physiological adaptation dominating in northern migrants.
BUILDING AND ENVIRONMENT
(2022)
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
Shengkai Zhao, Liu Yang, Siru Gao, Meng Li, Haiyan Yan, Yongchao Zhai
Summary: This study investigates the thermal comfort demands of occupants in nine typical large shopping malls in cold areas of China and provides guidance for energy efficient design. The results show that these malls suffer from overheating in winter and overcooling in summer, significantly affecting occupants' thermal comfort. The study also proposes indoor temperature settings based on thermal comfort, offering references for the design and operation of shopping malls in cold-climate zones.
BUILDING AND ENVIRONMENT
(2022)
Review
Construction & Building Technology
Natalia Giraldo Vasquez, Ricardo Forgiarini Rupp, Rune Korsholm Andersen, Jorn Toftum
Summary: This paper presents a critical review of studies on the effects of window views, daylighting, and lighting on occupant behavior, perception, performance, and well-being. The analysis shows that differences in predictors, data collection methods, and outcomes have led to inconclusive results. The authors propose a simple model for predicting occupant performance, but due to limited data and scattered points, there are uncertainties in the model.
BUILDING AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Jakob Eggeling, Christofer Rydenfalt, Boris Kingma, Jorn Toftum, Chuansi Gao
Summary: ClimApp was developed to help individuals reduce the risk of thermal stress and provide personalized advice. Despite its innovative features, its usability needs improvement.
Article
Construction & Building Technology
Ricardo Forgiarini Rupp, Jacob Feder Piil, Claes Cubel, Lars Nybo, Jorn Toftum
Summary: Wider temperature ranges in buildings can reduce energy use, but the effects on individuals vary due to differences in endogenous heat production. In this study, the authors evaluated individual thermal responses and found that cold sensitivity is related to a measurable difference in resting metabolic rate. They also observed a difference in neutral temperature between sexes, but no difference in thermal perception or skin temperature. These findings suggest that current temperature setpoints may not account for individual differences and could have negative implications for cold sensitive individuals.
ENERGY AND BUILDINGS
(2023)
Editorial Material
Thermodynamics
Jorn Toftum
SCIENCE AND TECHNOLOGY FOR THE BUILT ENVIRONMENT
(2023)
Article
Construction & Building Technology
Jorn Toftum, Geo Clausen
Summary: This study investigated the indoor environment in Danish classrooms and its impact on student well-being and performance. The findings revealed that inadequate ventilation in classrooms negatively affects students' well-being and concentration, pointing to a challenge in achieving satisfactory air quality in Danish school buildings.
ENERGY AND BUILDINGS
(2023)
Review
Construction & Building Technology
Luca Zaniboni, Jorn Toftum
Summary: This study provides a scoping review on indoor environment design and sensorial perception of people with autism spectrum condition (ASC). Current standards and guidelines lack information on people with special needs. Autistic people have different sensorial perception and may benefit from proper design of the indoor conditions. Rating: 8 out of 10.
BUILDING AND ENVIRONMENT
(2023)
Article
Biophysics
Jakob Eggeling, Christofer Rydenfaelt, Amitava Halder, Jorn Toftum, Lars Nybo, Boris Kingma, Chuansi Gao, Christofer Rydenfalt
Summary: The ClimApp smartphone application combines meteorological forecast data with personal information to provide individualized thermal warning and indoor comfort in response to heat and cold stress. The study validated the ClimApp index and compared it with the Universal Temperature Climate Index (UTCI), finding that ClimApp had a valid prediction while UTCI did not. Both models showed a statistically significant correlation with the perceived thermal sensation.
INTERNATIONAL JOURNAL OF BIOMETEOROLOGY
(2023)
Article
Construction & Building Technology
L. Zaniboni, M. Sarey Khanie, G. Pernigotto, J. Toftum, A. Gasparella, B. W. Olesen
Summary: The satisfaction of occupants is positively influenced by daylight access, but issues still exist with artificial lighting levels. Therapists tend to assess their environmental perception more globally and show more concern about light and daylight satisfaction when comfort issues are present.
LIGHTING RESEARCH & TECHNOLOGY
(2022)