Article
Construction & Building Technology
Weitao Liang, Xiaobo Di, Shukui Zheng, Leyu Wu, Jianjun Zhang
Summary: This paper studies three types of thermal bridges in vacuum insulation panels. It calculates the linear thermal transmittance of a single panel with different barrier films, thickness, and central thermal conductivity. The results show that the transmittance increases by 6.1 times when the barrier film changes from metalized polymer films to laminated aluminum foils. The paper also investigates the thermal bridges caused by gas gaps, and the thermal bridge effect on insulated decorative panels for building envelopes.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Thermodynamics
Sankarshan Verma, Antony Sara, Harjit Singh
Summary: This paper investigates the effect of opacifiers on perlite core vacuum insulation panels at temperatures between 10-70 degrees C. The results show that the effect of opacifiers on perlite core VIPs is different from that on fumed silica VIPs. An optimal proportion of opacifiers for perlite core VIPs is identified, and the temperature dependent thermal conductivity of VIPs is resolved.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Construction & Building Technology
Akos Lakatos, Zsolt Kovacs
Summary: In order to reduce the energy use of buildings, the use of insulation materials is a possible solution to improve energy efficiency. However, as regulations become stricter, thicker insulation materials are required. Research has started to focus on decreasing the thickness and thermal conductivity of materials, leading to the development of new types of insulation materials with lower thermal conductivity.
ENERGY AND BUILDINGS
(2021)
Article
Construction & Building Technology
Heshachanaa Rajanayagam, Irindu Upasiri, Keerthan Poologanathan, Perampalam Gatheeshgar, Paul Sherlock, Chaminda Konthesingha, Brabha Nagaratnam, Dilini Perera
Summary: The study found that using Vacuum Insulation Panels (VIP) can significantly reduce the U-value of LSF walls, while plasterboards have minimal impact on the U-value. The position of VIP within the LSF wall configuration had negligible effects on the U-value. The study suggested optimized LSF wall configurations based on the research results.
Article
Construction & Building Technology
Mahmood Alam, Marco Picco, Shahaboddin Resalati
Summary: This research proposes a holistic methodology for accurately assessing the financial and environmental feasibility of using thermal insulation materials in building retrofitting. The methodology is applied to a case study of an office building, where different types of insulation materials are simulated and analyzed under various climate conditions. The results show that the holistic approach, taking into account heating and cooling loads as well as space value, favors the use of advanced materials such as vacuum insulation panels, with a payback time of 1.3 to 4.2 years. However, the environmental assessment reveals that traditional materials like mineral wool have a significantly lower carbon payback time compared to vacuum insulation panels, suggesting the need for environmentally-friendly production processes.
BUILDING AND ENVIRONMENT
(2022)
Review
Construction & Building Technology
Ankang Kan, Ni Zheng, Wenbing Zhu, Dan Cao, Wei Wang
Summary: This paper introduces the research and application of vacuum insulation panels (VIPs) in China, which are high-performance insulation materials. It summarizes the concept, structure, and insulation mechanism of VIPs, as well as the latest achievements in core materials, barrier layers, and getters. The applications of VIPs in various fields are also discussed. The main current problems, such as optimizing thermal conductivity and improving service life, are defined, along with proposed solutions for further development.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Green & Sustainable Science & Technology
Weigang Zhao, Wen Yan, Zhicheng Zhang, Haili Gao, Qinzhi Zeng, Guanben Du, Mizi Fan
Summary: Thermal insulation is a key technology in reducing energy consumption, and this study proposes an efficient method to develop innovative and cost-effective core materials for vacuum insulation panels (VIPs). The study investigates the effect of adding glass fiber to wood pulp fiber on the thermal insulation performance of the composite core materials. The results show that the thermal conductivity of the VIPs decreases with increasing glass fiber content, and the developed VIPs have comparable thermal insulation to commercial products.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Thermodynamics
Lei Ni, Zhaofeng Chen, Phalguni Mukhopadhyaya, Xinyang Zhang, Qiong Wu, Qianhua Yu, Ganhua Miu
Summary: The study utilizes numerical simulation to investigate the thermal conductivity of fiber/powder porous media under vacuum conditions. Results show that finer powder diameter leads to smaller pore size and better ability to maintain lower effective thermal conductivity at higher pressure.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Construction & Building Technology
Hideya Yamamoto, Daisuke Ogura
Summary: The study investigated the gas-adsorption mechanism by getters in VIPs and proposed a long-term-performance prediction model that considers temperature dependence, as well as a model that takes non-absorbed gases into account. Comparing the long-term performance of VIPs of different sizes confirmed the accuracy of the calculation results.
JOURNAL OF BUILDING PHYSICS
(2022)
Article
Construction & Building Technology
Zhiguang Zhao, Xingshuo Yang, Xiaoling Qu, Jiawei Zheng, Fangyu Mai
Summary: This study proposed a thermal inertia factor to more comprehensively evaluate the thermal insulation performance of wall materials. It was found that there is a proportional relationship between density and decrement factor as well as time lag, and the comprehensive thermal inertia of AAC panels was favorable when the density of AAC was in the range of 700-900 kg/m3.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Hideya Yamamoto, Daisuke Ogura
Summary: This study validates the theoretical model of the long-term performance of VIPs by measuring the internal pressure of VIPs and the construction environment on-site. The results show that the adsorption and release of gas by the getter are influenced by environmental conditions, and the temperature dependence is crucial for stabilizing the performance of VIPs.
ENERGY AND BUILDINGS
(2022)
Article
Energy & Fuels
Qianqian Sun, Jun Xu, Chaobo Lu, Shiyun Zhu, Gengye Lin, Mizi Fan, Jun Li, Kefu Chen
Summary: A new strategy was developed to prepare vacuum insulation panel (VIP) core materials using light, ecofriendly, and renewable kapok fibres. The kapok fibre VIPs showed excellent thermal insulation performance, with a thermal conductivity as low as 6.12 mW/(m center dot K) at an internal pressure of 0.05 Pa. These VIPs also demonstrated outstanding thermal performance stability, with only a 9-13% increase in thermal conductivity when the ambient temperature increased from 15 to 55 degrees C. The low density of the VIPs, below 105 kg/m(3), was attributed to the special thin-walled and large cavity structure of kapok fibres. Therefore, kapok fibres are a potential alternative to fume silica for sustainable, green, renewable, and eco-friendly VIPs.
Article
Thermodynamics
Sankarshan Verma, Harjit Singh
Summary: Expanded perlites have been identified as potential core material candidates for vacuum insulation panels due to their lower cost compared to fumed silica. By altering their structural properties, such as particle size and porosity, the insulation properties of expanded perlites can be improved. Numerical calculations using finite element method showed a correlation between the thermal conductivity of perlite cores and their packing structures, providing a framework for designing cost-effective thermal insulation systems.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Thermodynamics
Ankang Kan, Xuexiang Zhang, Zhaofeng Chen, Dan Cao
Summary: A new type of vacuum insulation panels (VIPs) with recycled cotton fiber core was prepared and investigated in this study. The micromorphology of the recycled cotton core material, as well as the barrier and thermal conductivity of the prepared VIPs, was experimentally and mathematically analyzed. The results showed that VIPs with AF barrier envelopes performed better in terms of thermal conductivity, and the optimum gas pressure for VIPs' effective thermal conductivity was less than 0.1Pa. The VIPs with cotton fiber core material have good thermal properties and the dual characteristics of low cost and environmental protection.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Agricultural Engineering
Xu Dong, Qianqian Zhang, Yuling Lan, Qinzhi Zeng, Mizi Fan, Lihui Chen, Weigang Zhao
Summary: In this study, a hybrid composite material made from bamboo fiber and glass fiber was used as the thermal insulation material for vacuum insulation panels (VIPs). The results demonstrated that the composite material exhibited a uniform fiber dispersion and a three-dimensional network structure, leading to a significant reduction in thermal conductivity while maintaining excellent aging performance.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Construction & Building Technology
Babak Raji, Martin J. Tenpierik, Regina Bokel, Andy van den Dobbelsteen
INTERNATIONAL JOURNAL OF VENTILATION
(2020)
Article
Energy & Fuels
Luuk Graamans, Martin Tenpierik, Andy van den Dobbelsteen, Cecilia Stanghellini
Article
Construction & Building Technology
Evangelia Despoina Giouri, Martin Tenpierik, Michela Turrin
ENERGY AND BUILDINGS
(2020)
Article
Energy & Fuels
Nick ten Caat, Luuk Graamans, Martin Tenpierik, Andy van den Dobbelsteen
Summary: The study highlights the importance of considering local energy potentials at the city block level by exploring the potential of rooftop greenhouse solar collectors as a renewable alternative to conventional district heating. While solar thermal energy can replace natural gas heating, the significance of lighting on agricultural yields cannot be overlooked.
Article
Acoustics
Dadi Zhang, Martin Tenpierik, Philomena M. Bluyssen
Summary: This study introduced a new method of individual control to improve classroom acoustics, which was found to be more effective than traditional classroom-level acoustic improvements in reducing reverberation time and increasing speech transmission index. The simulations considered instruction and self-study situations, and showed that individual-level improvements can impact the sound pressure level differently for teacher's speech and other children's talk. Further research is recommended to test different individually controlled devices in real classrooms.
Article
Acoustics
J. Niesten, M. J. Tenpierik, J. Krimm
Summary: Recent studies have shown that environmental noise in urban environments poses a significant health risk, with hard facade materials further transmitting the noise. Reliable prediction methods are desired to anticipate these effects, with various methods existing to predict sound levels in urban contexts. Changing facade materials can potentially improve sound levels in the area by 1.7 to 9.3 dB(A).
BUILDING ACOUSTICS
(2022)
Article
Acoustics
Dadi Zhang, Martin Tenpierik, Philomena M. Bluyssen
Summary: This study aims to develop an individually controlled noise-reducing device for primary school children to improve their acoustic environment. The prototype received positive feedback from over 200 children, with 83% liking the device and 61% expressing interest in having it in their own classrooms. Feedback from the testing phase will be used to make modifications for future improvements.
Article
Green & Sustainable Science & Technology
Nick ten Caat, Martin Tenpierik, Andy van den Dobbelsteen
Summary: The production, processing, and transportation of food, especially animal-based products, have a significant environmental impact. Urban food production and a shift towards a plant-based diet are effective methods to reduce food carbon emissions. This study simulated a theoretical community-wide diet shift in three neighborhoods and found that Detroit has the largest carbon reduction potential.
Article
Construction & Building Technology
Martin J. Tenpierik, Mohammed Lachi, Christophe Bliard, Guillaume Polidori, Chadi Maalouf
Summary: Due to environmental concerns, bio-based materials are increasingly being studied and used in buildings. This study explores the thermal inertia of bricks made of a sugar-beet-pulp/starch mixture and filled with different materials. The results show that bricks filled with phase change material have higher thermal inertia but adding PCM is only effective for thinner walls.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Construction & Building Technology
Marta Fernandes Oliveira, Paulo Mendonca, Martin Tenpierik, Pedro Santiago, Jose F. Silva, Ligia Torres Silva
Summary: How to analyze the omissions of thermal regulations and evaluate methodologies that provide inaccurate building execution or thermal certificates? By analyzing simulation methods and shading calculations, discrepancies caused by simplifications allowed by the regulations are identified and exemplified using case studies. The Portuguese regulation is used as a case study, revealing incorrect conclusions and assumptions due to unequal access to solar radiation or the omission of angles and time periods in the shading factor calculation. The aim is to propose a calculation process that minimizes discrepancies between simulation and reality for sustainable output.
Review
Acoustics
Jesse Bakker, Martijn Lugten, Martin Tenpierik
Summary: This article presents a literature review combining results and methods from over 40 individual studies on the acoustic effects of vertical greening. It shows that vertical greenery is effective for reduction of mid and high frequency noise, unless air cavities or resonators are introduced. The review emphasizes on the application of vertical greenery in streets and urban blocks, aiming to provide key design parameters for noise reduction.
BUILDING ACOUSTICS
(2023)
Article
Construction & Building Technology
Prateek Wahi, Thaleia Konstantinou, Martin J. Tenpierik, Henk Visscher
Summary: This study presents an approach to determine the extent of renovation required for existing Dutch dwellings to transition to lower-temperature district heating systems. The study defines criteria for evaluating the readiness of dwellings for lower-temperature heating and indicates that moderate intervention levels are needed for the case study dwelling to be ready for low-temperature heating.
Article
Construction & Building Technology
Elias Harb, Chadi Maalouf, Christophe Bliard, Martin Tenpierik, Mohammed Lachi, Fabien Bogard, Guillaume Polidori
Summary: This paper aims to study the thermal performance of starch/beet-pulp bio-composite hollowed bricks at a wall scale. Numerical and experimental studies were conducted to compare the thermal resistance of the bricks. The results showed a good agreement between the numerical and experimental results, indicating the high thermal performance of the studied bio-composite.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
R. Viula, R. Bokel, M. Tenpierik
Summary: Daylighting is desirable in classrooms but can be challenging due to the risk of discomfort from glare. Existing metrics for evaluating glare from daylight have not been validated for classroom settings. A previous study found that Daylight Glare Probability (DGP) had better predictive power for glare discomfort in classrooms, but correlated weakly away from window light sources. This investigation aims to improve the DGP equation to better predict glare discomfort in classroom settings.
LIGHTING RESEARCH & TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Pieter Nick ten Caat, Martin J. Tenpierik, Tithi Sanyal, Nico M. J. D. Tillie, Andy A. J. F. van den Dobbelsteen, Geoffrey Thun, Sean Cullen, Shun Nakayama, Theodora Karanisa, Stewart Monti
Summary: Urbanization leads to concentrated demand for food, energy and water resources, resulting in increased greenhouse gas emissions. The FEW nexus integrative approach offers a potential framework for sustainable resource management in cities, but existing evaluation tools have limitations. This paper introduces FEWprint, an integrated carbon accounting platform that allows for evaluations of urban areas. The platform calculates a consumption-based footprint derived from various resource sectors and can be used to compare emissions between communities.
CLEANER ENVIRONMENTAL SYSTEMS
(2022)
