Article
Construction & Building Technology
Dileep Kumar, Morshed Alam, Jay G. Sanjayan
Summary: This study developed heat resistive and storage panels (HRSP) using recycled expanded glass as a filler material, and tested their properties and analyzed their performance through simulations. The results showed that HRSP4 could reduce summertime overheating, wintertime undercooling, and energy consumption in buildings under temperate oceanic climate conditions.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Energy & Fuels
Mahdi Ghafoori, Moatassem Abdallah, Serena Kim
Summary: This study presents the development of a system that can predict building electricity demand and determine optimal schedules for charging and discharging electric vehicles to minimize peak demand. The system uses machine learning models to predict electrical power demand and an optimization model to identify the best charging and discharging schedules. The implementation of this system provides practical solutions for managing electricity demand in commercial buildings.
Article
Construction & Building Technology
Dileep Kumar, Morshed Alam, Jay Sanjayan, Muhammad Harris
Summary: Phase change materials (PCM) can reduce energy consumption and improve thermal comfort in buildings. However, there are limitations in integrating PCM into construction materials, primarily due to the selection of suitable porous materials. This study aimed to select the most suitable porous material for developing Form Stable PCM (FSPCM) cement composite for concrete panels in building envelopes. Five different porous materials were considered based on their porosity, geometry, and surface morphology, and the performance of the synthesized FSPCM composite was evaluated. The study revealed that silica aerogel granules (SAG) had the highest PCM absorption capacity, while recycled expanded glass (REG) had lower absorption capacity. The Capric Acid/Hydrophobic expanded Perlite (CAHEP) showed the best overall performance in terms of absorption, thermal conductivity, strength, thermal inertia, latent heat storage, and thermal storage.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Michele Bottarelli, Eleonora Baccega, Silvia Cesari, Giuseppe Emmi
Summary: This manuscript discusses the behavior of a multi-source heat pump system coupled with phase change materials (PCMs) based on data collected during one-year testing in a laboratory. The results show that PCMs can compensate for peak loads during harsh weather conditions, and the multi-source heat pump system performs well with a winter coefficient of performance higher than 5.
Article
Construction & Building Technology
Zhixuan Fan, Yunchao Zhao, Yu Shi, Xuying Liu, Dahua Jiang
Summary: In this work, a new composite phase change material (CPCM) with low thermal conductivity was synthesized and a novel solar-powered interlayer ventilation-phase change wall (SPIV-PCW) was presented. Experimental studies showed that SPIV-PCW had better thermal performance than traditional phase change lightweight walls, with a significant reduction in peak temperature and nighttime heat flow. SPIV-PCW is a promising solution for building cooling energy conservation in hot climates.
ENERGY AND BUILDINGS
(2023)
Article
Energy & Fuels
Lee Cheun Hau, Yun Seng Lim
Summary: This paper reviews existing controllers for BESS and proposes two indices for measuring the true performances of BESS controllers. It highlights the importance of monitoring technical parameters such as voltage magnitudes during peak demand reductions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Zeyad Amin Al-Absi, Mohd Isa Mohd Hafizal, Mazran Ismail
Summary: Phase change materials (PCM) can improve the thermal performance of building envelopes, especially in warm and hot climatic conditions. This study experimentally investigates the thermal performance of PCM-based panels developed for walls' exterior finishes. The findings demonstrate the high effectiveness of PCM exterior applications, with significant reductions in internal surface temperature and heat flux during the PCM melting process.
JOURNAL OF BUILDING ENGINEERING
(2022)
Review
Chemistry, Physical
Jose Luis Reyez-Araiza, Jorge Pineda-Pinon, Jose M. Lopez-Romero, Jose Ramon Gasca-Tirado, Moises Arroyo Contreras, Juan Carlos Jauregui Correa, Luis Miguel Apatiga-Castro, Eric Mauricio Rivera-Munoz, Rodrigo Rafael Velazquez-Castillo, Jose de Jesus Perez Bueno, Alejandro Manzano-Ramirez
Summary: The study shows that using phase change materials (PCMs) in buildings for additional heating can increase heat storage capacity by absorbing latent heat, providing an effective way to reduce energy consumption. The encapsulation methods at macro and micro levels are the most viable way to apply PCMs in construction elements, but more research is needed to process bio-based PCMs for increased environmental friendliness.
Article
Energy & Fuels
Valentina Sierra, Farid Chejne
Summary: A mathematical model for designing constructive systems with thermally efficient microencapsulated phase change materials (MPCM) in mortar was developed. The model quantifies the impact of design variables, such as MPCM percentage, wall thickness, and application method, on room temperature. The results show that external application of MPCM can reduce the internal room temperature, while internal application can maintain a uniform temperature.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Thermodynamics
Qian Wu, Baowen Yan, Yanna Gao, Xi Meng
Summary: The adaptability of phase-change material (PCM) varies in different types of walls, with higher contribution efficiency in light-weight and middle-weight walls, but lower contribution efficiency in heavy-weight walls.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Xi Chen, Xiangyun Kong, Shuaiyin Wang, Xiuwen Fu, Bowen Yu, Kun Yao, Yan Zhong, Jihui Li, Wenyuan Xu, Yongxin Liu
Summary: An experimental thermal storage gypsum-matrix model with low density and thermal energy conservation was produced by incorporating traditional building materials and microencapsulated phase change materials. The addition of microencapsulated phase change materials improved the thermal inertia and reduced the internal temperature of the model. This research laid the experimental foundation for the development of higher performance thermal energy storage gypsum boards.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Polymer Science
Silvia Barbi, Francesco Barbieri, Simona Marinelli, Bianca Rimini, Sebastiano Merchiori, Michele Bottarelli, Monia Montorsi
Summary: The building sector has a significant impact on global energy consumption and greenhouse gas emissions. Phase change materials (PCMs) have the potential to enhance energy efficiency when integrated into building materials, but further research and optimization are needed as the technology is still in its early stages.
Article
Construction & Building Technology
Ru Ji, Xiang Li
Summary: This paper proposes the use of thermochromic (TC) coatings to improve the energy efficiency of phase change materials (PCMs) attached to building envelopes. Simulation findings show that, compared to traditional PCM systems, the TC-PCM system can reduce the annual energy demand by 42.9 kWh/m2 in the climate characteristics of Shanghai, with a corresponding energy-saving rate of 39.9%. The adaptive solar absorptance of TC-PCM systems enhances the phase change cycle performance of PCMs, reducing the cooling and heating energy demand. The TC-PCM system has the potential for significant energy-savings in hot summer and cold winter climate zones, with a maximum energy-saving rate of 10.2%.
BUILDING AND ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Mahdi Mohkam, S. M. Hojjat Mohammadi, Reza Arababadia, Ebrahim Jahanshahi Javaran
Summary: Buildings account for a significant portion of global energy consumption and greenhouse gas emissions. This study investigates the impact of using phase change materials (PCM) and precooling techniques on the energy consumption and peak load of a sample building. The results show that PCM can effectively reduce cooling loads, and when combined with precooling, further energy consumption and peak load reductions can be achieved. However, the cost savings during hot months are not significant due to low electricity prices in Iran.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Article
Energy & Fuels
Oselen J. Imafidon, David S. -K. Ting
Summary: This study investigates the effectiveness of incorporating honeycomb phase change material (PCM) into the walls of a retrofitted building in Ottawa, Canada in reducing heat flux. The results show that incorporating 1-cm thick PCM with a peak melting temperature of 20℃ can significantly reduce heat gain and heat loss through the building walls on a typical summer day with outdoor temperature ranging from 15.0 to 26.5℃.
JOURNAL OF ENERGY STORAGE
(2022)
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.