Article
Thermodynamics
V Ljungdahl, K. Taha, J. Dallaire, E. Kieseritzky, F. Pawelz, M. Jradi, C. Veje
Summary: This study investigates the theoretical and experimental aspects of a Phase Change Material (PCM)-based ventilation system module, developing a numerical model to predict the system's dynamic performance. The optimal PCM melting temperature is found to significantly increase cooling capacity compared to the reference temperature. The study highlights the importance of PCM mass and melting temperature in optimizing the efficiency and performance of the PCM-driven ventilation system.
Article
Thermodynamics
E. Inkeri, T. Tynjala, M. Nikku
Summary: Combining a heat pump with thermal energy storage is an efficient way to utilize variable renewable energy. This paper introduces a novel integration method for simultaneous consumption and charging of thermal energy storage using phase change materials. The concept is demonstrated in domestic hot water systems.
APPLIED THERMAL ENGINEERING
(2022)
Article
Construction & Building Technology
Mustapha Mahdaoui, Said Hamdaoui, Abdelouahad Ait Msaad, Tarik Kousksou, Tarik El Rhafiki, Abdelmajid Jamil, Mohammed Ahachad
Summary: The study investigates the use of phase change material (PCM) in Moroccan buildings to improve the thermal performance of external walls. Through physical modeling and numerical analysis, it is found that the use of PCM can stabilize and reduce indoor temperature fluctuations, significantly improving the thermal inertia of buildings.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
S. Summa, G. Remia, C. Di Perna, F. Stazi
Summary: This research compares the performance of brick blocks with micropores and multiple air cavities to traditional super-insulated lightweight walls in terms of thermal conductivity and thermal inertia. The results show that the new single-layer blocks with low conductivity and high thermal inertia significantly limit the internal air temperature, reducing summer peak loads and cooling energy consumption.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Rodrigo Karini Leitzke, Eduardo Grala da Cunha, Anderson Priebe Ferrugem, Thaisa Leal da Silva
Summary: One of the main problems in the national civil construction sector is the regulation of internal spaces' temperature in situations of low thermal capacity, especially in light constructions. To overcome this, Phase Change Materials (PCM) are used, which store or release latent heat as they go through a melting or freezing phase. This study reviews the application of PCM technologies in civil construction and analyzes their use in Brazilian Bioclimatic Zones, showing that they significantly improve energy efficiency in buildings with different levels of thermal insulation.
ENERGY AND BUILDINGS
(2023)
Article
Construction & Building Technology
Nessrine Essid, Anissa Eddhahak, Jamel Neji
Summary: This paper investigates the energy efficiency of PCM-concrete wallboards through experimental and numerical methods. The results show that PCMs play a key role in reducing indoor temperature and thermal fluctuations of different PCM-wallboards, with delayed temperature peaks emphasizing the enhanced energy efficiency of PCM-wallboards compared to traditional concrete, especially for bilayer wallboards.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Environmental Sciences
Meriem Nouira, Habib Sammouda
Summary: Integrating phase change materials in building-integrated photovoltaic systems as a passive method can enhance their thermal and electrical performances, despite the low thermal conductivity associated with pure phase change materials. Inserting fins in the phase change material improves its thermal conductivity, leading to an improvement in heat transfer rate.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Construction & Building Technology
Mustapha Salihi, Maryam El Fiti, Yasser Harmen, Younes Chhiti, Ahmed Chebak, Fatima Ezzahrae M'Hamdi Alaoui, Mounia Achak, Fouad Bentiss, Charafeddine Jama
Summary: Passive latent heat thermal energy storage technologies with phase change materials (PCM) can effectively improve indoor comfort and reduce energy consumption in occupied buildings. This study investigates the parameters for the effective utilization of PCM-enhanced integrated building walls in a semi-arid climate. The results show that PCM-integrated walls can reduce cooling and heating loads, improve indoor comfort, and the optimal PCM for the semi-arid climate is RT-28 HC. Additionally, double layers and triple layers of PCM provide more efficient energy consumption reduction compared to single-layer PCM, and mechanical ventilation has a positive impact on the performance of PCM walls.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Energy & Fuels
Shilei Lu, Jiehao Zheng, Ran Wang, Jiawen Zhu
Summary: This research introduces a novel coupled heating system that combines a solar air heater with a ventilation Phase Change Material (PCM) wall. The system exhibits high thermal storage and release efficiency, significantly improving indoor thermal comfort.
Article
Energy & Fuels
Yohana Ezzat, Ahmed A. Abdel-Rehim
Summary: Phase Change Materials (PCM) are commonly used in thermal storage applications. However, the long simulation time of PCM numerical models has been a major limitation for modeling large 2D and 3D models, as well as conducting long-term experiments. In this study, an ANSYS FLUENT NITA scheme was employed to compare with the default ITA scheme. The results showed that the NITA scheme can save simulation time by more than 89% and achieve a maximum error percentage of 0.27% compared to the ITA scheme.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Mahdi Momeni, Amir Fartaj
Summary: This paper introduces a novel PCM-to-air and liquid heat exchanger for thermal energy storage, which can provide a hybrid heat source and improve thermal system performance. Numerical simulations are used to analyze the heat transfer characteristics and phase change process, and the effect of airflow variation on the thermal response is studied. Experimental results demonstrate that the PCM can store and release excess heat during charging and discharging processes, providing extra heating time for the airside.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Idris Al Siyabi, Sourav Khanna, Tapas Mallick, Senthilarasu Sundaram
Summary: Thermal energy storage using Phase Change Materials (PCMs) is currently of great interest, and the use of multiple PCM technique has been shown to enhance thermal performance in a shell-and-tube heat exchanger. Both experimental and numerical studies demonstrate that the multiple PCM arrangement results in a higher average temperature of PCM compared to other arrangements.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Environmental Sciences
Nour Lajimi, Nour Ben Taher, Noureddine Boukadida
Summary: Before installing energy systems in buildings, understanding and controlling the behavior of the premises is crucial, including heat and water transfer phenomena control (air conditioners, heat pumps, heat exchangers, etc.). Insulating the ceiling can effectively reduce energy loss due to solar radiation exposure in summer and winter. This article presents a numerical study using software (DIGITAL Visual FORTRAN 95) to investigate the impact of incorporating a layer of PCM on thermal behavior, mass, occupant thermal comfort, and energy consumption in summer and winter, based on realistic climatic conditions in Tunisia.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Energy & Fuels
Yohana Ezzat, R. Y. Sakr, Ahmed A. Abdel-Rehim
Summary: Phase change materials (PCMs) are widely used in critical applications due to their ability to store thermal energy and stabilize temperature. This study investigates the influence of thermal expansion coefficient and mushy zone parameter on PCMs numerical modeling. The findings show that the appropriate selection of thermal expansion coefficient can control the melting process time, while the mushy zone parameter directly affects the melting profiles.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Cigdem Susantez
Summary: Through numerical investigation of two different phase change materials in various configurations, it was found that the LHTES unit with n-octadecane in configuration-1 completed phase change earliest and absorbed the most heat.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Construction & Building Technology
V. Costanzo, G. Evola, L. Marletta
ENERGY AND BUILDINGS
(2016)
Article
Green & Sustainable Science & Technology
Vincenzo Costanzo, Gianpiero Evola, Luigi Marletta, Fabiana Pistone Nascone
Article
Green & Sustainable Science & Technology
Antonio Artino, Gianpiero Evola, Giuseppe Margani, Edoardo Michele Marino
Article
Green & Sustainable Science & Technology
Stefano Cascone, Gianpiero Evola, Antonio Gagliano, Gaetano Sciuto, Chiara Baroetto Parisi
Article
Energy & Fuels
Vincenzo Costanzo, Gianpiero Evola, Marco Infantone, Luigi Marletta
Article
Green & Sustainable Science & Technology
Giuseppe Margani, Gianpiero Evola, Carola Tardo, Edoardo Michele Marino
Article
Green & Sustainable Science & Technology
Antonio Artino, Riccardo Caponetto, Gianpiero Evola, Giuseppe Margani, Edoardo Michele Marino, Emanuele Murgano
Article
Energy & Fuels
Gianpiero Evola, Vincenzo Costanzo, Luigi Marletta
Summary: The H2020 project e-SAFE is researching market-ready wooden envelope renovation solutions for non-historic buildings to improve energy efficiency and seismic performance. Preliminary analyses show that adding Cross Laminated Timber (CLT) and wooden-based insulation can greatly enhance thermal and acoustic performance, but interstitial condensation may occur in cold climates.
Article
Construction & Building Technology
Gianpiero Evola, Vincenzo Costanzo, Alessandra Urso, Carola Tardo, Giuseppe Margani
Summary: This paper advances the knowledge on the use of prefabricated timber-based panels in building renovation by analyzing the thermal performance of two different renovation solutions. The results show a significant reduction in energy demand for heating and cooling when using these solutions. However, thermal bridges still contribute to heat losses after renovation and should be further addressed.
BUILDING AND ENVIRONMENT
(2022)
Article
Energy & Fuels
L. Marletta, G. Evola, R. Arena, A. Gagliano
Summary: The availability of low-cost electricity-driven air-conditioning systems has led to an increase in electricity demand for space cooling. Thermally-driven solar-assisted cooling systems are a promising alternative, but their economic viability is still uncertain. To address this, many EU states, including Italy, have implemented subsidies proportional to the thermal energy produced by solar collectors. This study examines the suitability and consistency of these subsidies, focusing on a case study in Palermo, Italy. The results show that the proposed solar-assisted absorption cooling system can significantly reduce primary energy demand and CO2 emissions compared to conventional electric chillers.
Article
Green & Sustainable Science & Technology
Alessandra Urso, Vincenzo Costanzo, Francesco Nocera, Gianpiero Evola
Summary: This study analyzed moisture-related risks in innovative wood-based retrofit solutions using advanced hygrothermal simulation tools. The results showed that insulation materials with high permeability and moisture capacity can prevent mold growth but result in increased heat losses. In some cases, foam glass or extruded polyurethane may be preferable due to their high resistance to mold growth. The application of a vapor-open waterproof membrane on the outer side of the insulation is recommended, while a vapor barrier on the outer side of the existing wall worsens mold-related issues.
Article
Construction & Building Technology
Maurizio Detommaso, Vincenzo Costanzo, Francesco Nocera, Gianpiero Evola
Summary: This study investigates the thermal behavior and perceived indoor thermal conditions of a well-insulated lightweight building in the Mediterranean area with a green facade. The results show that Hedera helix performs better when the foliage layer is at an intermediate state of its growing process.
BUILDING AND ENVIRONMENT
(2023)
Article
Construction & Building Technology
Alessandra Urso, Gianpiero Evola, Vincenzo Costanzo, Francesco Nocera
Summary: In the field of numerical hygrothermal simulations, it is suggested by literature that multiyear weather datasets should be used to predict long-term moisture-related risks in building components. However, this study investigates the use of single year datasets for time-efficiency improvement, and compares their reliability with multiyear datasets. The study concludes that single year datasets can provide reliable results with less computational time, especially in warm European climates.
JOURNAL OF BUILDING ENGINEERING
(2023)
Proceedings Paper
Construction & Building Technology
G. Evola, G. Margani, V Costanzo, A. Artino, D. L. Distefano, G. Semprini, M. Lazzaro, D. Arnone
Summary: The EU-funded e-SAFE project is developing a new deep renovation system for non-historical RC framed buildings, aiming to improve energy efficiency and seismic resistance. This paper describes the functionalities of the e-SAFE Decision Support System (e-DSS), which guides technicians and building owners in a conscious preliminary co-design activity to choose the most suitable renovation solution. The e-DSS assesses the building's energy performance, environmental benefits, costs, ROI, and identifies unsuitable solutions.
SUSTAINABILITY IN ENERGY AND BUILDINGS 2022
(2023)
Review
Construction & Building Technology
Gianpiero Evola, Vincenzo Costanzo, Luigi Marietta
Article
Construction & Building Technology
Parth Bansal, Steven Jige Quan
Summary: This study investigates the relationship between urban form and canopy layer urban heat island (CUHI) using a relatively large sample of microclimate sensors in Seoul, Korea. The study compares different statistical models and finds that the spatially explicit gradient boosting decision tree (GBDT) model has the highest accuracy. The study also shows that the effect of urban form on CUHI varies at different time instances during the day. These findings provide valuable insights for planners to understand the complexity of urban climate and reduce CUHI magnitude.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Miaomiao Liu, Salah Almazmumi, Pinlu Cao, Carlos Jimenez-bescos, John Kaiser Calautit
Summary: Windcatchers provide effective low-energy ventilation and summer passive cooling in temperate climates. However, their use in winter is limited due to significant ventilation heat loss and potential discomfort. This study evaluates the applicability of windcatchers in low-temperature conditions, highlighting the need for control strategies to reduce over-ventilation and the integration of heat recovery or thermal storage to enhance winter thermal conditions.
BUILDING AND ENVIRONMENT
(2024)
Review
Construction & Building Technology
Behrouz Nourozi, Aneta Wierzbicka, Runming Yao, Sasan Sadrizadeh
Summary: This article presents a systematic review of ventilation solutions in hospital wards, aiming to enhance pathogen removal performance while maintaining patient and healthcare staff comfort using air-cleaning techniques. The study reveals the importance of proper ventilation systems in reducing infection risk and adverse effects of cross-contamination.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhen Yang, Weirong Zhang, Hongkai Liu, Weijia Zhang, Mingyuan Qin
Summary: The study examines the influence of personalized local heating on the thermal comfort of occupants in old residential buildings. The findings reveal that personalized local heating can increase the overall thermal sensation of occupants, but only a few methods are effective in enhancing thermal comfort. The chosen heating methods and background temperature affect the participants' selection of heating parts.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Hong Cheng, Dan Norback, Huilin Zhang, Liu Yang, Baizhan Li, Yinping Zhang, Zhuohui Zhao, Qihong Deng, Chen Huang, Xu Yang, Chan Lu, Hua Qian, Tingting Wang, Ling Zhang, Wei Yu, Juan Wang, Xin Zhang
Summary: The home environment and sick building syndrome (SBS) symptoms in five southern Chinese cities have been studied over time. The study found a decrease in asthma prevalence and an increase in allergic rhinitis. Cockroaches, rats, mice, mosquitoes or flies were identified as consistent biological risk factors for SBS symptoms, while redecoration, buying new furniture, and traffic air pollution were identified as other risk factors.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Chaojie Xing, Zhengtao Ai, Zhiwei Liu, Cheuk Ming Mak, Hai Ming Wong
Summary: This study experimentally investigated the emission characteristics of droplets around the mouth during dental treatments. The results showed that the peak mass fraction of droplets occurs within the size range of 20 μm to 100 μm, and droplets with a diameter less than 200 μm account for over 80% of the mass fraction. The dominant emission direction of droplets is towards the dummy's head and chest, forming an approximately cone shape.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Zhijian Liu, Zhe Han, Lina Hu, Chenxing Hu, Rui Rong
Summary: This study compared the effects of different respiratory behaviors on the distribution of aerosols in a ward and the risk of infection for healthcare workers using numerical simulation. It was found that talking in the ward significantly increased aerosol concentrations, particularly short periods of talking. Wards designed with side-supply ventilation had lower overall infection risk. Talking alternately between healthcare workers and patients slightly extended the impact time of aerosols.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Yan, Mengyuan Kang, Haodong Zhang, Zhiwei Lian, Xiaojun Fan, Chandra Sekhar, Pawel Wargocki, Li Lan
Summary: In a high-density city, opening windows for sleep may lead to increased indoor temperature, higher PM2.5 concentration, and noise disturbance, which can negatively impact sleep quality.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yan Bai, Liang Liu, Kai Liu, Shuai Yu, Yifan Shen, Di Sun
Summary: This study developed a non-intrusive personal thermal comfort model using machine learning techniques combined with infrared facial recognition. The results showed that the ensemble learning models perform better than traditional models, and the broad learning model has a higher prediction precision with lower computational complexity and faster training speed compared to deep neural networks. The findings provide a reference for optimizing building thermal environments.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Yue Lei, Zeynep Duygu Tekler, Sicheng Zhan, Clayton Miller, Adrian Chong
Summary: Mixed-mode ventilation is a promising solution for achieving energy-efficient and comfortable indoor environments. This study found that occupants can thermally adapt when switching between natural ventilation (NV) and air-conditioning (AC) modes within the same day, with the adaptation process stabilizing between 35 to 45 minutes after the mode switch. These findings are important for optimizing thermal comfort in mixed-mode controls, considering the dynamic nature of thermal adaptation.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Nan Mo, Jie Han, Yingde Yin, Yelin Zhang
Summary: This study develops a method based on the LCZ framework for a comprehensive evaluation of urban-scale heat island effects, considering the impact of geographic factors on LST. The results show that Guilin's geomorphological conditions lead to abnormal heat island effects during winter, and the cooling effects of mountains and water bodies vary seasonally in different built areas, with LCZ 2 exhibiting the strongest cooling effect.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Tunga Salthammer
Summary: Monitoring the potential formaldehyde emission of wood-based materials through test chamber investigations has significantly contributed to reducing indoor formaldehyde concentrations. However, the different methodologies used in these procedures prevent direct result comparison. Empirical models for converting formaldehyde steady-state concentrations based on temperature, humidity, air change rate, and loading were developed in the 1970s and have been modified to accommodate the development of lower-emitting materials. Formaldehyde emissions from wood-based materials are complex and require nonlinear regression tools for mathematical analysis.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Katarina Stebelova, Katarina Kovacova, Zuzana Dzirbikova, Peter Hanuliak, Tomas Bacigal, Peter Hartman, Andrea Vargova, Jozef Hraska
Summary: This study investigated the impact of reduced short-wavelength light on the hormone melatonin metabolite 6-sulfatoxymelatonin (u-sMEL) and examined the association between previous day's light exposure and u-sMEL. It was found that reducing short-wavelength light during the day did not change the concentration of u-sMEL. Personal photopic illuminance was positively correlated with u-sMEL in the reference week. The illuminance had a significant impact on u-sMEL, as shown by the evaluation of the mean of all three urine samples. However, this correlation was not found in the experimental week.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Ruoxin Xiong, Ying Shi, Haoming Jing, Wei Liang, Yorie Nakahira, Pingbo Tang
Summary: This study proposes a data-model integration method to identify and calibrate uncertainties in machine learning models, leading to improved thermal perception predictions. The method utilizes the Multidimensional Association Rule Mining algorithm to identify biased human responses and enhances prediction accuracy and reliability. The study also evaluates different calibration techniques and discovers their potential in enhancing prediction reliability.
BUILDING AND ENVIRONMENT
(2024)
Article
Construction & Building Technology
Beichao Hu, Zeda Yin, Abderrachid Hamrani, Arturo Leon, Dwayne McDaniel
Summary: This paper introduces an innovative super-resolution approach to model the air flow and temperature field in the cold aisle of a data center. The proposed method reconstructs a high-fidelity flow field by using a low-fidelity flow field, significantly reducing the computational time and enabling real-time prediction.
BUILDING AND ENVIRONMENT
(2024)
