Article
Construction & Building Technology
Yuying Liang, Nan Zhang, Huijun Wu, Xinhua Xu, Ke Du, Jianming Yang, Qin Sun, Kaijun Dong, Gongsheng Huang
Summary: The study shows that the thermal environment and thermal comfort created by the DRCU under low radiant cooling temperatures meet the comfort criteria of the ASHRAE Standard.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Qiong Chen, Nan Li
Summary: The research developed a physics-based model for radiant ceiling cooling systems and applied model predictive control to improve zone air temperature control, achieving better thermal comfort and energy efficiency. By simplifying the system model and utilizing advanced control strategies, the proposed approach demonstrated significant potential for enhanced performance compared to traditional control methods.
BUILDING AND ENVIRONMENT
(2021)
Article
Construction & Building Technology
Zhiwei Li, Jili Zhang
Summary: Radiant floor heating (RFH) is an advanced technology that can improve thermal comfort for occupants. This study focuses on developing a control-oriented thermodynamic model and a distributed MPC scheme for large-scale RFH systems with hydraulic coupling. The experiment and simulation results demonstrate that the proposed scheme can achieve hydraulic decoupling between occupants and improve thermal comfort.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Xiang Zhou, Yunliang Liu, Jingsi Zhang, Lifang Ye, Maohui Luo
Summary: Radiant cooling systems have the potential to reduce energy consumption, but radiant asymmetries can decrease occupants' thermal comfort.
ENERGY AND BUILDINGS
(2022)
Article
Construction & Building Technology
Xuwei Zhu, Jiying Liu, Xiangyuan Zhu, Xiaole Wang, Yanqiu Du, Jikui Miao
Summary: The study examined the performance of a combined radiant floor and fan coil cooling system in a high humidity environment. The system was able to adjust the water supply temperature in real time based on outdoor meteorological conditions, ensuring comfort and preventing condensation. The results showed that the system had good energy efficiency and comfort under different operating strategies in high humidity conditions. Recommendations include early use of the radiant floor system in high humidity and early use of the fan coil system in high temperature. Continuous operation of the radiant floor system, intermittent operation of the fan coil system, and integration of natural cooling were also suggested.
Article
Thermodynamics
Xiaosong Gu, Mingliang Cheng, Xiaofeng Zhang, Zixin Qi, Jiang Liu, Zhenfeng Li
Summary: The study established a non-centralized hybrid radiant floor cooling system to address issues encountered by conventional intermittently operating RFC systems. By precooling with an air source heat pump, fan coils, and outdoor air dehumidifier, the system improved thermal comfort and cooling capacity, suitable for residential homes or offices.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Construction & Building Technology
Haruka Kitagawa, Takashi Asawa, Tetsu Kubota, Andhang Rakhmat Trihamdani, Kikyo Sakurada, Hiroshi Mori
Summary: The study proposed a novel radiant floor cooling system using a phase change material in Indonesia, aiming to improve building cooling efficiency and occupants' comfort in hot and humid climates through a combination of ventilative cooling and radiant cooling. Experimental results showed that horizontal pivot windows facilitated air inflow and reduced heat transfer on the floor, contributing to better thermal comfort in the daytime.
BUILDING AND ENVIRONMENT
(2021)
Article
Thermodynamics
Xiaolong Wang, Wenjun Lei, Wenke Zhang, Youheng Zhang, Linhua Zhang
Summary: This study investigates the thermal process of a coupled cooling system and proposes a simplified calculation method for floor surface temperature, as well as an automatic control method. The results are verified by experiments and can guide the design and control of this type of cooling systems.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Construction & Building Technology
Dong Liu, Na Liu, Donglin Ren, Xiaozhou Wu, Jun Wang, Yabin Tian, Anjie Hu, Li Wan, Jialan Wen
Summary: This study compared the thermal sensation and physiological responses to a radiant floor heating system between young adults and preschool children. The results showed that preschool children adapt better to the thermal environment and have a higher sensitivity to temperature changes compared to adults.
Article
Construction & Building Technology
Haruka Kitagawa, Takashi Asawa, Maria Alejandra Del Rio, Tetsu Kubota, Andhang Rakhmat Trihamdani
Summary: This study investigated the applicability of a thermal energy simulation (TES) for a naturally ventilated building with a PCM-based radiant floor cooling system. The TES model was validated by comparing it with field measurements and a CFD simulation. Good correlations were observed between the measurement and TES simulation, and the TES had similar accuracy to the coupled CFD. The results showed that the proposed PCM-based radiant floor cooling system achieved a thermal comfort period of up to 68.5% a year.
BUILDING AND ENVIRONMENT
(2023)
Article
Energy & Fuels
Andres Gallardo, Umberto Berardi
Summary: The study developed a RCP system with PCM and established design criteria through parametric dynamic simulations, showing effective results in a small test chamber.
Article
Construction & Building Technology
Jing Ren, Jiying Liu, Shiyu Zhou, Moon Keun Kim, Jikui Miao
Summary: The development of collaborative control strategies for radiant cooling and ventilation systems improves thermal comfort and energy efficiency. This study used the Transient System Simulation (TRNSYS) tool integrated with the parametric simulation manager jEPlus to determine the optimal starting and operation mode of a combined radiant floor cooling (RFC) and ventilation system. The results were validated by an experiment. A collaborative control strategy using the PMV-based model was proposed to adjust the S-v/S-R according to the PMV range, resulting in a highly efficient operation and maximum energy savings of 26.2%.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Haruka Kitagawa, Takashi Asawa, Tetsu Kubota, Andhang Rakhmat Trihamdani
Summary: This study established a coupled simulation model of heat balance analysis and CFD for naturally ventilated buildings with PCMs, and conducted a sensitivity analysis for a radiant floor cooling system using PCMs. The results showed high accuracy in evaluating PCM temperature and heat balance, with improved precision through coupling with radiative heat transfer calculation. Optimum settings for the radiant floor cooling system under hot and humid conditions were identified as a 6 mm PCM thickness and nighttime ventilation.
BUILDING AND ENVIRONMENT
(2022)
Article
Construction & Building Technology
Qingqing Li, Ye Zhang, Tieming Guo, Jianhua Fan
Summary: A heat transfer model of a three-layer floor was developed by coupling 2-D and 1-D heat transfer problems. The results of the calculations showed good agreement with experiments and can be used to estimate thermal performance and thermal resistance of the floor, providing reference for radiant floor design.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Xiaolong Wang, Tian Mu, Lili Zhang, Wenke Zhang, Linhua Zhang
Summary: This study investigates the thermal comfort issues of an office using floor radiant cooling technology through numerical simulation and experimental verification. The findings indicate that the floor surface temperature and indoor air temperature have significant effects on thermal comfort, while relative humidity has a minor impact.
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)