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Review
Construction & Building Technology
Xiaoyu Jin et al.
Summary: Data related to building energy use is crucial for research and applications in building energy efficiency. However, most cities lack comprehensive and publicly accessible building energy use datasets, hindering urban building energy modeling, energy planning, performance benchmarking, and policymaking. This review paper provides insights based on a comprehensive analysis of worldwide open datasets and their applications, including detailed information on 33 building energy datasets and their subdomains, as well as proposed policy implications. The review also discusses privacy solutions and offers valuable conclusions to support city-level building energy data disclosure, modeling, and policymaking.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Karsten Voss et al.
Summary: The Solar Decathlon is an international competition for universities to design, build, and operate solar-powered houses. It provides a platform for interdisciplinary teaching, learning, and research. In 2022, the European edition of the competition was held in Germany with a focus on the development of European cities and residential apartment buildings. A total of 18 teams from 11 countries participated, showcasing energy efficiency and solar energy use in innovative architectural concepts.
ENERGY AND BUILDINGS
(2023)
Review
Construction & Building Technology
Swellam W. Sharshir et al.
Summary: Due to the increasing heating and cooling needs of buildings, phase change materials (PCMs) have been widely used for latent thermal storage applications in the building sector. However, there are some limitations to their use. This article provides an overview of PCM classifications, commonly used types, disadvantages and solutions for thermal properties, safety, and cost issues, as well as the effectiveness of incorporating PCMs into building construction elements. The selection of PCM based on design considerations and the use of additives to enhance heat transfer are also discussed.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Cong Yu et al.
Summary: The inter-building effect (IBE) from surrounding buildings is important in high-density cities but commonly neglected in energy simulation. This study investigates the IBE on the energy use of high-rise office buildings in Hong Kong. Real-life office buildings and their communities were analyzed, and four scenarios were compared. The results show that IBE influences energy consumption by up to 13.1% and that shading blinds cannot be overlooked. These findings emphasize the importance of considering IBE on building energy consumption in high-density contexts on a case-by-case basis.
ENERGY AND BUILDINGS
(2023)
Article
Energy & Fuels
Zhihao Zhang et al.
Summary: This paper presents a method of active thermal insulation in the thermal energy storage system to reduce heat consumption and improve energy efficiency. By setting up a heat source area and a heat sink area, this system achieves reasonable heat distribution and thermal insulation. The effectiveness of the theoretical method is verified by designing an active insulation device in a water heater.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Hengxin Zhao et al.
Summary: In this study, a novel direct-expansion terminal is developed by combining a flat heat pipe and an air source heat pump, which improves cooling capacity and dehumidification ability. The terminal has a faster cooling speed, strong adjustability in dehumidification, and meets the demands of part-time and part-space cooling.
ENERGY AND BUILDINGS
(2022)
Article
Thermodynamics
Rongji Xu et al.
Summary: By introducing a gravity pulsating heat pipe (GPHP), the gravity effect of the working fluid (WF) can be enhanced to increase the heat transfer limit and solve the dry-up issue in a conventional pulsating heat pipe (PHP) under high heat input. Experimental investigation of the GPHP using HFE-750 0 as the WF under different heat inputs (30-230 W) revealed three heat transfer stages: low heat-input steady-state operation, transition, and high heat-input steady-state operation. The GPHP exhibited quick and stable heat transfer performance at low heat input, while in the transition stage, the accumulation of liquid WF and the formation of a stable vapor film hindered heat transfer. Under high heat input, the liquid WF returned to the evaporative section, resulting in stable heat transfer with increasing latent heat transfer.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Energy & Fuels
Ming Yang et al.
Summary: Based on a thermodynamic model, this study proposes solar energy coupled LAES systems to improve the round trip efficiency. The results show that the 5C + 5 T system performs the best. Decreased solar energy results in decreased power generation for the systems under off-design conditions.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
Xue Liu et al.
Summary: This study investigates the performance and interpretability of machine learning-based energy usage models through the comparison of feature selection methods and analysis of model interpretability. The results suggest that the wrapper method is effective in improving model accuracy.
ENERGY AND BUILDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Pawan Chilbule et al.
Summary: Heat pipe is a passive technique for heat conduction with high efficiency and broad applications, especially in low and medium temperature heat applications. This study focuses on the construction and thermal performances of heat pipe integrated solar thermal applications, including water heating, air/space heating, water desalination, and solar cooking systems.
MATERIALS TODAY-PROCEEDINGS
(2022)
Article
Green & Sustainable Science & Technology
Pooria Khalilmoghadam et al.
Summary: This study integrated a latent heat storage unit and built-in condenser with a solar still, utilizing the dissipated latent heat of vapor during the day and transferring it to the saline water after sunset through Pulsating Heat Pipes (PHPs). The addition of phase change materials (PCM) on the condenser surfaces prevented overheating and improved efficiency, resulting in a significant increase from 23.7% to 48.5% compared to conventional solar stills.
Article
Construction & Building Technology
Lijun Sun et al.
Summary: This study aims to improve travel quality and efficiency by optimizing underground space design, reducing CO2 emissions, and discussing factors affecting underground space utilization. The results show that catering and shopping are the most influential factors on pedestrian flow distribution, and the optimized design can significantly increase passenger flow.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Jiansheng Wang et al.
Summary: The study shows that the start-up and heat transfer performance of pulsating heat pipes (PHP) is significantly affected by inclination angle and the structure of variable diameter can reduce the sensitivity of PHP to gravity. Furthermore, PHP with variable diameter structure can even exhibit start-up phenomena with horizontal arrangement.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Yun Liu et al.
Summary: Numerical modeling and experimental validation were conducted for two-phase flow and heat transfer in a loop thermosyphon at different filling ratios. The results show that different flow patterns and heat transfer characteristics occur at different filling ratios, affecting both sensible and latent heat transfer efficiency.
NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
(2021)
Article
Thermodynamics
Alberto Mucci et al.
Summary: Pulsating heat pipes (PHPs) have well-known properties and high heat transfer rates, but the theory behind their processes remains uncertain. Computational fluid dynamics can be used to inspect PHPs, but has only been applied to PHPs with simple geometries.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Chang Yue et al.
Summary: The paper investigates the influences of surface wettability on the thermal and flow characteristics of refrigerant in the evaporator of a micro-channel separate heat pipe. It is found that hydrophilic surface enhances heat transfer rate while hydrophobic surface accelerates bubble nucleation, with heat transfer rate, fluid velocity, and initial nucleate spot decreasing as contact angle increases.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
L. H. Saw et al.
Summary: This study introduces a closed loop pulsating heat pipe (CLPHP) roof cooling system, which is investigated for its thermal performance through experiments and comparison. The experiment results show that the cool roof system with CLPHP technology can significantly lower the attic temperature compared to the bare metal roof design, making it a promising method for improving thermal comfort in buildings.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Zhanxiao Kang et al.
Summary: This study proposed a novel pulsating heat pipe with separating walls, which was found to have the best thermal performance at a filling ratio of 70%. The separating walls located at different positions within the flow channel showed varying effects on the equivalent thermal conductivity, with the separating wall at the middle of the flow channel performing best at the filling ratio of 70%.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Latif Aref et al.
Summary: The study aims to increase the thermal efficiency of a flat plate closed-loop pulsating heat pipe solar collector by introducing a novel closed-loop pulsating heat pipe (CLPHP) with a dual-diameter structure. Experimental results show that the thermal performance of the dual-diameter configuration is considerably better than the single-diameter in different inclination angles, achieving a thermal efficiency of 72.4% under sunny weather conditions.
Article
Construction & Building Technology
Tian Yan et al.
Summary: The coupled pipe-encapsulated PCM wall system with a nocturnal sky radiator efficiently utilizes natural cooling sources to reduce indoor heat gain and enhance the utilization efficiency of PCM. Experimental results demonstrate that the system can significantly decrease indoor cooling load and wall internal surface temperature.
ENERGY AND BUILDINGS
(2021)
Article
Thermodynamics
Fubo Xie et al.
APPLIED THERMAL ENGINEERING
(2020)
Article
Energy & Fuels
Hossein Alizadeh et al.
Article
Thermodynamics
Ayad M. Al Jubori et al.
CASE STUDIES IN THERMAL ENGINEERING
(2020)
Article
Construction & Building Technology
Honghai Yang et al.
ENERGY AND BUILDINGS
(2019)
Article
Thermodynamics
Song Mengjie et al.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2019)
Article
Thermodynamics
Eui Guk Jung et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Article
Thermodynamics
Rong Ji Xu et al.
ENERGY CONVERSION AND MANAGEMENT
(2017)
Article
Thermodynamics
Chao Dang et al.
APPLIED THERMAL ENGINEERING
(2017)
Review
Green & Sustainable Science & Technology
Xiaohong Han et al.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2016)
Article
Multidisciplinary Sciences
Je-Sung Koh et al.
Article
Thermodynamics
Jian Qu et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2012)
Article
Metallurgy & Metallurgical Engineering
Yong-ho Park et al.
JOURNAL OF CENTRAL SOUTH UNIVERSITY
(2012)
Article
Thermodynamics
Giuseppe Grazzini et al.
INTERNATIONAL JOURNAL OF REFRIGERATION-REVUE INTERNATIONALE DU FROID
(2011)
Article
Thermodynamics
S. Rittidech et al.
APPLIED THERMAL ENGINEERING
(2007)
Article
Thermodynamics
Gherhardt Ribatski et al.
EXPERIMENTAL THERMAL AND FLUID SCIENCE
(2007)
