Article
Construction & Building Technology
Arman Ameen, Alireza Bahrami, Khaled El Tayara
Summary: Retrofitting measures in old buildings are important in reducing energy usage to counteract climate change and greenhouse gas emissions. This study evaluates the energy usage, thermal comfort, and CO2 emissions of an old building by modifying factors such as building orientation, shading systems, and alternative energy supply. The results show the variations in heating energy, thermal comfort, and CO2 emissions levels based on different parameters.
Article
Construction & Building Technology
Turkan Goksal Ozbalta, Yusuf Yildiz, Irem Bayram, Osman Cem Yilmaz
Summary: This paper focuses on improving the energy efficiency of a public historical building in a hot-humid climate zone of Turkey through measures such as cost-optimal envelope, lighting, heat pump, and photovoltaic panels. A sensitivity analysis shows that changes in discount rates impact global costs, while changes in economic parameters may reduce annual costs and cost-effectiveness in scenarios with high initial investment costs.
ENERGY AND BUILDINGS
(2021)
Article
Chemistry, Physical
Vesna Pungercar, Florian Musso
Summary: This study conducted research on the hygrothermal performance of salt in building applications and found that salt can be a solution to replace energy-consuming building materials in certain climate conditions, with good hygrothermal responses, but its performance is poor in humid environments.
Article
Construction & Building Technology
Fares Bennai, Mohammed Yacine Ferroukhi, Ferhat Benmahiddine, Rafik Belarbi, Armelle Nouviaire
Summary: This study analyzes the hygrothermal behavior of hemp concrete as an infill layer in wood-frame structures, showing its excellent insulation properties and thermal comfort, significantly reducing energy consumption and stabilizing indoor relative humidity levels.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
Yingli Lou, Yunyang Ye, Yizhi Yang, Wangda Zuo
Summary: This study introduces a novel method to accurately predict emission reduction potential of building retrofits by using dynamically changing electricity emission factors. The research focuses on medium office buildings in five locations in the U.S. and reveals new phenomena on the emission reduction potential, providing guidance for future building retrofits.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Yujie Lu, Peixian Li, Yih Perng Lee, Xiangnan Song
Summary: This study presents a framework for decision-making on energy retrofits for institutional buildings in a tropical climate, with a detailed case study as demonstration. The results suggest that occupants-oriented retrofit options perform better in energy retrofit, and it is recommended to adopt multiple retrofit measures together to enhance cost-effectiveness.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Energy & Fuels
Andra Blumberga, Ritvars Freimanis, Edite Biseniece, Agris Kamenders
Summary: In most cases, internal insulation is the only solution to improve the energy efficiency of historic buildings. This study presents the long-term monitoring of the hygrothermal performance of an internally insulated historic stone wall building. The measurement results and hygrothermal assessment show a significant decrease in energy consumption and the potential for energy saving.
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)
Article
Thermodynamics
Malgorzata Fedorczak-Cisak, Elzbieta Radziszewska-Zielina, Andrzej Bialkiewicz, Aleksander Prociak, Tomasz Steidl, Tadeusz Tatara, Maria Zychowska, Damian Piotr Muniak
Summary: This paper aims to improve the energy quality and performance of a historic church building while preserving its historic elements and interior microclimate. The authors conducted research and experiments using various methods and concluded that it is possible to significantly reduce the heating demand of the building.
Article
Construction & Building Technology
Haonan Zhang, Haibo Feng, Kasun Hewage, Mehrdad Arashpour
Summary: This study proposed a data-driven framework that combines machine learning, multi-objective optimization, and multi-criteria decision-making techniques to evaluate and formulate optimal retrofit plans for residential buildings.
Article
Construction & Building Technology
Alessia Emanuela Losini, Anne-Cecile Grillet, Linh Vo, Giovanni Dotelli, Monika Woloszyn
Summary: This study evaluated the impact of three biopolymers as stabilizers on the hygrothermal behavior of rammed earth (RE) at material and building scale. The hygrothermal properties of the RE were characterized, including sorption isotherm, water vapor permeability, thermal conductivity, and specific heat capacity. Simulation at whole-building scale was conducted using the hygrothermal data to assess heating demand, thermal comfort, and passive control of indoor humidity. The results showed minimal influence on hygric properties due to stabilizers, but the thermal conductivity of RE stabilized with lignin was 33% higher, resulting in increased heating demand. RE walls effectively reduced temperature oscillations in summer and could lower indoor temperature by up to 10 degrees during hot weather. Indoor humidity also benefitted from the passive regulation of RE walls, regardless of stabilizer use.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Rahma Belloum, Boudjemaa Agoudjil, Nawal Chennouf, Abderrahim Boudenne
Summary: The current research focuses on the development and application of bio-based materials in insulating and cost-effective construction. The study examines the impact of mass transfer on hygrothermal conditions and energy consumption in buildings made with date palm concrete (DPC). The results show that DPC exhibits superior hygrothermal performance and energy-saving characteristics compared to conventional construction materials.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Ghadie Tlaiji, Fabienne Pennec, Salah Ouldboukhitine, Mohamad Ibrahim, Pascal Biwole
Summary: This study evaluates the hygrothermal performance of multi-layered straw walls under different climate conditions, showing that different types of straw walls are suitable for different climates. The performance of straw walls depends greatly on the added internal and external thermal insulation layers, as they affect the material's drying ability.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Construction & Building Technology
N. R. M. Sakiyama, J. Frick, M. Stipetic, T. Oertel, H. Garrecht
Summary: A novel aerogel-based insulating external render was developed and tested for durability in a large-scale weathering test, showing high water absorption during weathering but not a significant reduction in thermal conductivity.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Shuen Simon Sui Jiang, Jian Li Hao, Janaynna Nayami De Carli
Summary: The study compares various sustainable concrete mix designs to enhance the hygrothermal performance of concrete, reduce CO2 emissions, and maintain its mechanical properties. Recycled aggregates combined with supplementary cementitious materials can produce high-strength concrete with lower environmental impacts.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Thermodynamics
Ji Hun Park, Umberto Berardi, Seong Jin Chang, Seunghwan Wi, Yujin Kang, Sumin Kim
Summary: This study analyzed the energy performance of apartment buildings using retrofit systems with phase change materials (PCMs) in relation to building orientation, height, and climate factors. The results showed that different building orientations and heights require different PCM application temperatures for energy savings, highlighting the need to consider variables such as building orientation, height, and climate factors for effective PCM application in apartment buildings.
Article
Environmental Sciences
Seunghwan Wi, Ji Hun Park, Young Uk Kim, Sungwoong Yang, Sumin Kim
Summary: As energy use in the building sector increases worldwide, the demand for building materials with energy-saving characteristics and low thermal conductivity is growing. This study evaluated the main performance of 21 insulation materials used at construction sites, including thermal conductivity, water absorption rate, and acidity, providing appropriate methods for assessing their performance.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Jisoo Jeon, Ji Hun Park, Hyeonseong Yuk, Young Uk Kim, Beom Yeol Yun, Seunghwan Wi, Sumin Kim
Summary: Wood is a sustainable resource and building material that may suffer structural defects due to decay from moisture. By using biochar to prepare wood-derived biocomposites, it is possible to improve thermal insulation performance and water stability.
ENVIRONMENTAL RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Hyeonseong Yuk, Sungwoong Yang, Young Uk Kim, Beom Yeol Yun, Seunghwan Wi, Sumin Kim
Summary: The study analyzed the effects of absorbent porous sediments (PAS) and micro-encapsulated phase change materials (MPCM) on the indoor environment and on each other's abilities. By varying the mixing ratio, it was found that indoor finishing materials can effectively control humidity and temperature, exhibiting excellent performance.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Construction & Building Technology
Seunghwan Wi, Sungwoong Yang, Beom Yeol Yun, Sumin Kim
Summary: Among various construction methods, external insulation finishing can effectively utilize thermal energy of buildings and improve efficiency, optimized by using phase change material (PCM). The use of PCM in mortar composite specimen showed a significant improvement in time-lag effect by 59.4% even with just 10 wt% of MPCM, indicating excellent thermal storage performance for significant thermal performance improvement in building applications.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Environmental Sciences
Seunghwan Wi, Yujin Kang, Sungwoong Yang, Young Uk Kim, Sumin Kim
Summary: This study quantitatively analyzed five types of insulation materials and pollutants generated from building materials, examining the effects of pollutants discharged from insulation materials on the indoor environment. The necessity of legal management of contaminants emitted from insulation materials was proposed based on empirical research results.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Hyeonseong Yuk, Sungwoong Yang, Seunghwan Wi, Yujin Kang, Sumin Kim
Summary: Particles of fine dust generated from deteriorating building flooring were confirmed through a study using an accelerated friction deterioration device. Different surfaces of flooring resulted in varying particle distribution, with concentrations of fine dust reaching 327 mg/m3 in PM2.5 and 4828 mg/m3 in PM10. Further research is needed on the detection of fine dust in degraded building finishing materials.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Construction & Building Technology
Beom Yeol Yun, Yujin Kang, Young Uk Kim, Seunghwan Wi, Sumin Kim
Summary: This study aimed to analyze the effect of using phase change materials (PCMs) to stabilize room temperature and solve the problem of temperature instability for temporary hospital beds. The results showed that the application of macro packed PCMs (MPPCM) in buildings can effectively reduce box temperature, providing a comfortable indoor space for temporary beds.
BUILDING AND ENVIRONMENT
(2022)
Article
Engineering, Environmental
Sungwoong Yang, Hyeonseong Yuk, Beom Yeol Yun, Young Uk Kim, Seunghwan Wi, Sumin Kim
Summary: This study highlights the importance of improving building airtightness to reduce indoor fine dust concentration. By applying technologies such as sealing film, sealing lid, and padding, the experiment demonstrated a significant reduction in air leakage and indoor fine dust concentration.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Dimberu G. Atinafu, Beom Yeol Yun, Sungwoong Yang, Yujin Kang, Sumin Kim
Summary: This article reports on the thermal performance of a hybrid material supported n-alkane after one year of storage and 50 heating/cooling cycles. The hybrid material, consisting of metal-organic framework (MOF) and graphite, showed improved shape/thermal stability of tetradecane (TD) with high latent heat retention capacity, low leakage rate, and high PCM loading capacity, making it suitable for thermal management applications such as industrial waste heat recovery systems. The intermolecular interactions and capillary forces between the hybrid materials and TD provided high stability and compatibility, indicating the potential of the hybrid material in developing composite PCMs with comprehensive thermal characteristics.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Chemistry, Physical
Dimberu G. Atinafu, Beom Yeol Yun, Sungwoong Yang, Hyeonseong Yuk, Seunghwan Wi, Sumin Kim
Summary: This review highlights the recent progress in the design of composite PCMs based on hybrid nanoadditives, including fabrication and classification, potential applications, and synergistic effects of individual supporting materials on the thermal properties of PCMs.
ENERGY STORAGE MATERIALS
(2021)
Article
Construction & Building Technology
Seunghwan Wi, Sungwoong Yang, Young Uk Kim, Yujin Kang, Sumin Kim
Summary: Traditionally, insulation materials were developed to prevent heat loss or gain in buildings, but they are flammable and emit harmful chemicals. This study evaluated the fire resistance performance of five insulation materials, with phenolic foam being the only one meeting the noncombustible grade criteria.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Thermodynamics
Yujin Kang, Ho Hyen Jo, Sungwoong Yang, Seunghwan Wi, Sumin Kim
Summary: This study proposed a process for evaluating indoor hygrothermal performance using two different simulations and investigated the hygrothermal performance of the indoor environment based on the hygrothermal behavior of walls. The results showed that high relative humidity and water content were found inside wall and floor layers, and improving hygrothermal performance by changing building materials resulted in decreased heat and moisture fluxes.
APPLIED THERMAL ENGINEERING
(2022)
Article
Engineering, Environmental
Dimberu G. Atinafu, Seong Jin Chang, Umberto Berardi, Ki-Hyun Kim, Sumin Kim
Summary: The combination of metal-organic frameworks (MOF) and graphite in nanocomposites shows potential for developing shape-stable phase change materials (PCMs) with improved energy storage capacity. The composite exhibited high energy storage capacity, low electrical resistivity, and enhanced thermal stability, making it suitable for applications in electro/thermal energy management systems.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Thermodynamics
Yong Cheng, Fukai Song, Lei Fu, Saishuai Dai, Zhiming Yuan, Atilla Incecik
Summary: This paper investigates the accessibility of wave energy absorption by a dual-pontoon floating breakwater integrated with hybrid-type wave energy converters (WECs) and proposes a hydraulic-pneumatic complementary energy extraction method. The performance of the system is validated through experiments and comparative analysis.
Article
Thermodynamics
Jing Gao, Chao Wang, Zhanwu Wang, Jin Lin, Runkai Zhang, Xin Wu, Guangyin Xu, Zhenfeng Wang
Summary: This study aims to establish a new integrated method for biomass cogeneration project site selection, with a focus on the application of the model in Henan Province. By integrating Geographic Information System and Multiple Criterion Decision Making methods, the study conducts site selection in two stages, providing a theoretical reference for the construction of biomass cogeneration projects.
Article
Thermodynamics
Mert Temiz, Ibrahim Dincer
Summary: The current study presents a hybrid small modular nuclear reactor and solar-based system for sustainable communities, integrating floating and bifacial photovoltaic arrays with a small modular reactor. The system efficiently generates power, hydrogen, ammonia, freshwater, and heat for residential, agricultural, and aquaculture facilities. Thermodynamic analysis shows high energy and exergy efficiencies, as well as large-scale ammonia production meeting the needs of metropolitan areas. The hybridization of nuclear and solar technologies offers advantages of reliability, environmental friendliness, and cost efficiency compared to renewable-alone and fossil-based systems.
Editorial Material
Thermodynamics
Wojciech Stanek, Wojciech Adamczyk
Article
Thermodynamics
Desheng Xu, Yanfeng Li, Tianmei Du, Hua Zhong, Youbo Huang, Lei Li, Xiangling Duanmu
Summary: This study investigates the optimization of hybrid mechanical-natural ventilation for smoke control in complex metro stations. The results show that atrium fires are more significantly impacted by outdoor temperature variations compared to concourse/platform fires. The gathered high-temperature smoke inside the atrium can reach up to 900 K under a 5 MW train fire energy release. The findings provide crucial engineering insights into integrating weather data and adaptable ventilation protocols for smoke prevention/mitigation.
Article
Thermodynamics
Da Guo, Heping Xie, Mingzhong Gao, Jianan Li, Zhiqiang He, Ling Chen, Cong Li, Le Zhao, Dingming Wang, Yiwei Zhang, Xin Fang, Guikang Liu, Zhongya Zhou, Lin Dai
Summary: This study proposes a new in-situ pressure-preserved coring tool and elaborates its pressure-preserving mechanism. The experimental and field test results demonstrate that this tool has a high pressure-preservation capability and can maintain a stable pressure in deep wells. This study provides a theoretical framework and design standards for the development of similar technologies.
Article
Thermodynamics
Aolin Lai, Qunwei Wang
Summary: This study assesses the impact of China's de-capacity policy on renewable energy development efficiency (REDE) using the Global-MSBM model and the difference-in-differences method. The findings indicate that the policy significantly enhances REDE, promoting technological advancements and marketization. Moreover, regions with stricter environmental regulations experience a higher impact.
Article
Thermodynamics
Mostafa Ghasemi, Hegazy Rezk
Summary: This study utilizes fuzzy modeling and optimization to enhance the performance of microbial fuel cells (MFCs). By simulating and analyzing experimental data sets, the ideal parameter values for increasing power density, COD elimination, and coulombic efficiency were determined. The results demonstrate that the fuzzy model and optimization methods can significantly improve the performance of MFCs.
Article
Thermodynamics
Zhang Ruan, Lianzhong Huang, Kai Wang, Ranqi Ma, Zhongyi Wang, Rui Zhang, Haoyang Zhao, Cong Wang
Summary: This paper proposes a grey box model for fuel consumption prediction of wing-diesel hybrid vessels based on feature construction. By using both parallel and series grey box modeling methods and six machine learning algorithms, twelve combinations of prediction models are established. A feature construction method based on the aerodynamic performance of the wing and the energy relationship of the hybrid system is introduced. The best combination is obtained by considering the root mean square error, and it shows improved accuracy compared to the white box model. The proposed grey box model can accurately predict the daily fuel consumption of wing-diesel hybrid vessels, contributing to operational optimization and the greenization and decarbonization of the shipping industry.
Article
Thermodynamics
Huayi Chang, Nico Heerink, Junbiao Zhang, Ke He
Summary: This study examines the interaction between off-farm employment decisions between couples and household clean energy consumption in rural China, and finds that two-paycheck households are more likely to consume clean energy. The off-farm employment of women is a key factor driving household clean energy consumption to a higher level, with wage-employed wives having a stronger influence on these decisions than self-employed ones.
Article
Thermodynamics
Hanguan Wen, Xiufeng Liu, Ming Yang, Bo Lei, Xu Cheng, Zhe Chen
Summary: Demand-side management is crucial to smart energy systems. This paper proposes a data-driven approach to understand the relationship between energy consumption patterns and household characteristics for better DSM services. The proposed method uses a clustering algorithm to generate optimal customer groups for DSM and a deep learning model for training. The model can predict the possibility of DSM membership for a given household. The results demonstrate the usefulness of weekly energy consumption data and household socio-demographic information for distinguishing consumer groups and the potential for targeted DSM strategies.
Article
Thermodynamics
Xinglan Hou, Xiuping Zhong, Shuaishuai Nie, Yafei Wang, Guigang Tu, Yingrui Ma, Kunyan Liu, Chen Chen
Summary: This study explores the feasibility of utilizing a multi-level horizontal branch well heat recovery system in the Qiabuqia geothermal field. The research systematically investigates the effects of various engineering parameters on production temperature, establishes mathematical models to describe their relationships, and evaluates the economic viability of the system. The findings demonstrate the significant economic feasibility of the multi-level branch well system.
Article
Thermodynamics
Longxin Zhang, Songtao Wang, Site Hu
Summary: This investigation reveals the influence of tip leakage flow on the modern transonic rotor and finds that the increase of tip clearance size leads to a decline in rotor performance. However, an optimal tip clearance size can extend the rotor's stall margin.
Article
Thermodynamics
Kristian Gjoka, Behzad Rismanchi, Robert H. Crawford
Summary: This paper proposes a framework for assessing the performance of 5GDHC systems and demonstrates it through a case study in a university campus in Melbourne, Australia. The results show that 5GDHC systems are a cost-effective and environmentally viable solution in mild climates, and their successful implementation in Australia can create new market opportunities and potential adoption in other countries with similar climatic conditions.
Article
Thermodynamics
Jianwei Li, Guotai Wang, Panpan Yang, Yongshuang Wen, Leian Zhang, Rujun Song, Chengwei Hou
Summary: This study proposes an orientation-adaptive electromagnetic energy harvester by introducing a rotatable bluff body, which allows for self-regulation to cater for changing wind flow direction. Experimental results show that the output power of the energy harvester can be greatly enhanced with increased rotatory inertia of the rotating bluff body, providing a promising solution for harnessing wind-induced vibration energy.