Article
Construction & Building Technology
Vivek Anand, Devi Sendhil, E. Rajasekar
Summary: This paper investigates the effects of different activity intensities on metabolic rate and physiological responses through controlled climate chamber experiments. The study finds significant differences in metabolic rate among different age and BMI groups, as well as impacts of temperature, humidity, and other environmental factors on metabolic rate.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Zhaosong Fang, Peng Zhang, Peihao Wu, Li Li, Zhimin Zheng
Summary: As the global greenhouse effect intensifies, the urban heat island effect becomes increasingly severe, leading to high-temperature and metabolically intensive thermal environments. This study investigated human thermal comfort requirements at different temperatures and metabolic rates, revealing significant adverse symptoms and the preference for higher wind speeds and lower humidity among participants with high metabolic rates. The findings provide valuable insights into mitigating heat exposure-related occupational health risks in high-temperature environments.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Jeetika Malik, Ronita Bardhan
Summary: This study proposes a novel Adaptive Comfort for Low-Income Housing (ACL) model for the low-income housing of Mumbai, India. The study found that low-income occupants have lower thermal sensitivity and a wider comfort temperature band compared to their affluent counterparts. The existing national and international comfort standards are ineffective in predicting comfort conditions for Indian low-income occupants.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Cho Kwong Charlie Lam, Shuhang Cui, Jiarui Liu, Xiangrui Kong, Cuiyun Ou, Jian Hang
Summary: Internal migration across different climate zones in China has increased as people seek better economic and education opportunities. Research shows that long-term acclimatization and short-term thermal history impact outdoor thermal comfort, while exposure environment and activity also play a role.
ENERGY AND BUILDINGS
(2021)
Article
Environmental Sciences
Cho Kwong Charlie Lam, Yanping Gao, Hongyu Yang, Taihan Chen, Yong Zhang, Cuiyun Ou, Jian Hang
Summary: The study explored the interaction effects of long-term and short-term thermal history on outdoor thermal comfort. Findings suggest that thermal sensation is influenced by a significant interaction among UTCI thermal stress levels, climate zones, and prior exposure environments.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Construction & Building Technology
Giulia Lamberti, Francesco Leccese, Giacomo Salvadori, Francesca Contrada, Andrea Kindinis
Summary: In educational buildings, adaptive strategies can be implemented to achieve thermal comfort and reduce energy consumption. The role of climate in defining different adaptive capacities, thermal neutrality, comfort, and preference needs to be understood. A study was conducted on 17 naturally ventilated university classrooms from 10 buildings in Italy and France, collecting 1377 questionnaires related to environmental parameters. The results showed that despite performing fewer adaptive actions, French students had a lower neutral temperature compared to Italian students, indicating a climate-dependent adaptation.
ENERGY AND BUILDINGS
(2023)
Article
Environmental Sciences
T-S Neset, C. Navarra, M. Graca, T. Opach, J. Wilk, P. Wallin, L. Andersson, S. Santos Cruz, A. Monteiro, J. K. Rod
Summary: This study presents a prototype of a pedestrian routing tool to help citizens navigate urban heat. Through tests and interviews, the potential of the tool in supporting urban climate risk management, enhancing everyday adaptation, and increasing citizen engagement is evaluated. The results indicate that climate services that can be carried in one's pocket increase access to climate information and provide guidance for everyday adaptation practices. However, applications need to be contextualized and tailored to the user's needs and decision-making contexts.
Article
Construction & Building Technology
Manoj Kumar Singh, Ryozo Ooka, Hom B. Rijal, Sanjay Kumar, Richard de Dear
Summary: Buildings not only offer shelter, but also security, safety, and comfort, while also representing economic and socio-cultural status. High energy consumption of buildings has become a worldwide concern, but adaptive comfort principles provide opportunities for reducing energy consumption without compromising the comfort and quality of indoor environments. However, previous thermal comfort studies in the Northeastern part of India rarely address the thermal adaptation opportunities of office occupants.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Luca Borghero, Elisenda Cleries, Thibault Pean, Joana Ortiz, Jaume Salom
Summary: The intensity and duration of heat waves in upcoming summers are expected to increase due to climate change. As a result, existing buildings may not have sufficient thermal resilience to provide comfortable conditions for their occupants. Cooling strategies, such as natural ventilation and air conditioning, become increasingly important as these climatic events intensify. Simulation experiments have compared the behavior of a selected case study apartment under passive measures (natural ventilation) and active measures (mechanical ventilation and air conditioning). The results show that external overheating progressively weakens the thermal resilience of the building in ventilation scenarios, while air conditioning is more effective in maintaining comfortable conditions inside the house. The behavior of the user plays a fundamental role, as an aware user can significantly enhance comfort with natural ventilation and reduce energy consumption by an average of 15% with air conditioning.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Sanjay Kumar
Summary: This study evaluates the thermal adaptation status of Indian subjects in different types of buildings and finds that they have a high tolerance for indoor thermal conditions, with differences from international comfort standards. The study also suggests future research directions for achieving sustainable goals of energy efficiency and comfortable buildings in India.
JOURNAL OF BUILDING ENGINEERING
(2022)
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
Construction & Building Technology
S. Manavvi, E. Rajasekar
Summary: This study assessed the outdoor thermal comfort in different urban open space typologies in Chandigarh, India. The results showed significant differences in thermal comfort between summer and winter, with people being more sensitive to the thermal environment in summer. The green spaces were considered to be the most thermally comfortable among the evaluated open space typologies.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Liu Yang, Shengkai Zhao, Siru Gao, Hui Zhang, Edward Arens, Yongchao Zhai
Summary: This study found that females have lower metabolic rates and feel cooler and less comfortable than males at lower temperatures, while males have higher metabolic rates and feel warmer and less comfortable at higher temperatures. However, no significant differences in subjective or physiological responses were found between genders at neutral conditions.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Yuxin Wu, Hong Liu, Baizhan Li, Risto Kosonen, Shen Wei, Juha Jokisalo, Yong Cheng
Summary: The study found that considering thermal history is crucial for the accuracy of individual thermal comfort models. Results show that incorporating historical air temperature as an input parameter can significantly improve the prediction accuracy of thermal comfort and thermal demand.
BUILDING SIMULATION
(2021)
Article
Construction & Building Technology
Aanchal Sharma, Ashok Kumar
Summary: This paper presents the results of an adaptive thermal comfort field study conducted in naturally ventilated residential buildings in India's composite climate type. The study thoroughly explores subjective thermal comfort sensation, preference, acceptance and adaptive actions of users during monsoon, winter, and summer. The research findings include correlation analysis between subjective votes and thermal comfort evaluation parameters, as well as the influence of factors such as age, acclimatization, and education on thermal acceptance. The study also compares the results with national and international thermal comfort standards and proposes revising the thermal comfort index for Indian subjects.
ARCHITECTURAL ENGINEERING AND DESIGN MANAGEMENT
(2023)
Article
Environmental Studies
Sanjay Kumar, Anuj Mathur, K. B. Rana, Chandan Kumar
Summary: The objective of this study is to evaluate the potential of different passive design strategies using the bio-climatic approach in residential spaces in the composite climate of India. The results show that comfort can vary from 30% to 60% during summer and 43% to 70% during winter. Natural ventilation, sun shading, and direct evaporative cooling are effective passive cooling options during the warmer half of the year, whereas passive solar heating improves indoor comfort conditions during the colder half of the year. A guideline matrix for the use of passive design schemes in buildings for the composite climate of India is proposed.
INTERNATIONAL JOURNAL OF ENVIRONMENT AND SUSTAINABLE DEVELOPMENT
(2022)
Article
Energy & Fuels
Varun Kumar Gupta, Sanjay Kumar, Rajeev Kukreja
Summary: This study investigates the application of plasmonic nanofluids in direct absorption solar collectors. The experimental results show that using a reverse-irradiated DASC system can reduce temperature gradient and improve thermal conversion efficiency.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Green & Sustainable Science & Technology
Sanjay Kumar, Ashish Kumar, Nikhil Chander, Dwesh K. Singh
Summary: Solar desalination is a viable alternative for clean water in sunny areas, and researchers have made progress in improving the productivity of low-cost solar stills.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2022)
Article
Green & Sustainable Science & Technology
Sanjay Kumar, Manoj Kumar Singh, Nedhal Al-Tamimi, Badr S. Alotaibi, Mohammed Awad Abuhussain
Summary: A study on seasonal adaptive thermal comfort was conducted on university students in India's composite climate zone. The results showed that students had different preferences for temperature in different seasons, and the use of environmental controls and thermal adaptation enhanced overall thermal satisfaction.
Article
Construction & Building Technology
Sanjay Kumar
Summary: This study evaluates the thermal adaptation status of Indian subjects in different types of buildings and finds that they have a high tolerance for indoor thermal conditions, with differences from international comfort standards. The study also suggests future research directions for achieving sustainable goals of energy efficiency and comfortable buildings in India.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Energy & Fuels
Mohammed Awad Abuhussain, Nedhal Al-Tamimi, Badr S. Alotaibi, Manoj Kumar Singh, Sanjay Kumar, Rana Elnaklah
Summary: The aim of this research is to develop an architectural style that meets the requirements of residential buildings in the hot and dry climate of Najran. The courtyard concept and passive design strategies are used to satisfy the desert climate and sociocultural requirements. The results show that focusing on the courtyard and implementing passive design strategies significantly reduces energy consumption.
Article
Green & Sustainable Science & Technology
Varun Kumar Gupta, Sanjay Kumar, Rajeev Kukreja, Nikhil Chander
Summary: In the last decade, direct absorption solar collector has shown great potential in improving solar water heaters' efficiency by incorporating nanoparticles. However, plasmonic nanoparticles used in nanofluids have drawbacks of high cost, complex preparation processes, and environmental degradation. To overcome these issues, a hybrid nanofluid based on gold nanoparticles in Azadirachta Indica leaves extract was prepared and tested in real outdoor conditions for the first time. The results showed that the prepared hybrid nanofluid had broadband absorption across the visible and near infrared spectrum, achieving a maximum temperature gain of about 20 degrees C and a maximum photo-thermal efficiency of nearly 62%, which is 12% higher than water. The prepared samples were highly stable without sedimentation or agglomeration under repeated sun exposure.
Article
Thermodynamics
Vaibhav Dilip Nagale, Satyender Singh, Sanjay Kumar
Summary: This study presents the thermal performance prediction of a solar air heater design with integrated thermal energy storage systems in low temperature regions. The use of a recyclic double air pass and wavy corrugated PCM units with paraffin wax as PCM is explored. The results show that optimum outlet air temperature and size of the thermal energy storage systems can be achieved under certain geometric and flow parameters.
APPLIED THERMAL ENGINEERING
(2023)
Review
Green & Sustainable Science & Technology
Andi Taufan, Sheikh Ahmad Zaki, Ng Wai Tuck, Manoj Kumar Singh, Hom Bahadur Rijal
Summary: This study reviewed various retrofitting strategies implemented to improve mosque performance and found that optimizing design and operations can reduce energy consumption by half. The most substantial annual energy savings were observed by implementing a zoning strategy and an advanced air-conditioning design with intermittent operating system management to meet thermal comfort standards.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Construction & Building Technology
Manoj Kumar Singh, Ryozo Ooka, Hom B. Rijal, Sanjay Kumar, Richard de Dear
Summary: Buildings not only offer shelter, but also security, safety, and comfort, while also representing economic and socio-cultural status. High energy consumption of buildings has become a worldwide concern, but adaptive comfort principles provide opportunities for reducing energy consumption without compromising the comfort and quality of indoor environments. However, previous thermal comfort studies in the Northeastern part of India rarely address the thermal adaptation opportunities of office occupants.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Environmental Sciences
Parminder Singh, Sanjay Kumar, Nikhil Chander, Ashok Kumar Bagha
Summary: This study presents an asymmetric compound parabolic concentrator (ACPC)-based direct absorption solar collector (DASC) system using gold and silver nanoparticle-based plasmonic nanofluids. Real-time outdoor experiments demonstrate that the ACPC-based DASC system achieves a maximum thermal efficiency of around 70%, which is approximately 28% higher than a flat DASC system with water as the working fluid. Furthermore, the plasmonic nanofluids show excellent stability in retaining their optical properties even after hours of sun exposure.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Construction & Building Technology
Sanjay Kumar, Anuj Mathur, Rajeev Kukreja, Ashok Kumar Bagha
Summary: This study conducted a field survey on the thermal environment in hostel buildings and found that improving the quality of the thermal environment has a positive impact on the health, learning, and overall productivity of students. The study also proposed a more reliable method for assessing the thermal sensation of occupants.
ADVANCES IN BUILDING ENERGY RESEARCH
(2022)
Article
Construction & Building Technology
Samiran Khorat, Debashish Das, Rupali Khatun, Sk Mohammad Aziz, Prashant Anand, Ansar Khan, Mattheos Santamouris, Dev Niyogi
Summary: Cool roofs can effectively mitigate heatwave-induced excess heat and enhance thermal comfort in urban areas. Implementing cool roofs can significantly improve urban meteorology and thermal comfort, reducing energy flux and heat stress.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Qi Li, Jiayu Chen, Xiaowei Luo
Summary: This study focuses on the vertical wind conditions as a main external factor that limits the energy assessment of high-rise buildings in urban areas. Traditional tools for energy assessment of buildings use a universal vertical wind profile estimation, without taking into account the unique wind speed in each direction induced by the various shapes and configurations of buildings in cities. To address this limitation, the study developed an omnidirectional urban vertical wind speed estimation method using direction-dependent building morphologies and machine learning algorithms.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Xiaojun Luo, Lamine Mahdjoubi
Summary: This paper presents an integrated blockchain and machine learning-based energy management framework for multiple forms of energy allocation and transmission among multiple domestic buildings. Machine learning is used to predict energy generation and consumption patterns, and the proposed framework establishes optimal and automated energy allocation through peer-to-peer energy transactions. The approach contributes to the reduction of greenhouse gas emissions and enhances environmental sustainability.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ying Yu, Yuanwei Xiao, Jinshuai Chou, Xingyu Wang, Liu Yang
Summary: This study proposes a dual-layer optimization design method to maximize the energy sharing potential, enhance collaborative benefits, and reduce the storage capacity of building clusters. Case studies show that the proposed design significantly improves the performance of building clusters, reduces energy storage capacity, and shortens the payback period.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Felix Langner, Weimin Wang, Moritz Frahm, Veit Hagenmeyer
Summary: This paper compares two main approaches to consider uncertainties in model predictive control (MPC) for buildings: robust and stochastic MPC. The results show that compared to a deterministic MPC, the robust MPC increases the electricity cost while providing complete temperature constraint satisfaction, while the stochastic MPC slightly increases the electricity cost but fulfills the thermal comfort requirements.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Somil Yadav, Caroline Hachem-Vermette
Summary: This study proposes a mathematical model to evaluate the performance of a Double Skin Facade (DSF) system and its impact on indoor conditions. The model considers various design parameters and analyzes their effects on the system's electrical output and room temperature.
ENERGY AND BUILDINGS
(2024)
Article
Construction & Building Technology
Ruijun Chen, Holly Samuelson, Yukai Zou, Xianghan Zheng, Yifan Cao
Summary: This research introduces an innovative resilient design framework that optimizes building performance by considering a holistic life cycle perspective and accounting for climate projection uncertainties. The study finds that future climate scenarios significantly impact building life cycle performance, with wall U-value, windows U-value, and wall density being major factors. By using ensemble learning and optimization algorithms, predictions for carbon emissions, cost, and indoor discomfort hours can be made, and the best resilient design scheme can be selected. Applying this framework leads to significant improvements in building life cycle performance.
ENERGY AND BUILDINGS
(2024)
