scholarly journals Review of Solutions for the Use of Phase Change Materials in Geopolymers

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6044
Author(s):  
Michał Łach ◽  
Kinga Pławecka ◽  
Agnieszka Bąk ◽  
Marcin Adamczyk ◽  
Patrycja Bazan ◽  
...  
Keyword(s):  
Phase Change ◽  
Building Materials ◽  
Phase Change Materials ◽  
Matrix Material ◽  
Cost Effective ◽  
Mass Scale ◽  
Sustainable Construction ◽  
Thermal Gradients ◽  
Effective Form ◽  
The Matrix

The paper deals with the possibility of using Phase Change Materials (PCM) in concretes and geopolymer composites. The article presents the most important properties of PCM materials, their types, and their characteristics. A review of the latest research results related to their use in geopolymer materials is presented. The benefits of using PCM in building materials include the improvement of thermal comfort inside the building, and also the fact that the additive in the form of PCM reduces thermal gradients and unifies the temperature inside the concrete mix, which can reduce the risk of cracking. The paper also presents a critical analysis related to the feasibility of mass scale implementations of such composites. It was found that the use of PCM in sustainable construction is necessary and inevitable, and will bring a number of benefits, but it still requires large financial resources and time for more comprehensive research. Despite the fact that PCM materials have been known for many years, it is necessary to refine their form to very stable phases that can be used in general construction as well as to develop them in a cost-effective form. The selection of these materials should also be based on the knowledge of the matrix material.

scholarly journals Phase-Change Materials in Concrete: Opportunities and Challenges for Sustainable Construction and Building Materials

Materials ◽  
2022 ◽  
Vol 15 (1) ◽  
pp. 335
Author(s):  
Raju Sharma ◽  
Jeong-Gook Jang ◽  
Jong-Wan Hu
Keyword(s):  
Phase Change ◽  
Large Scale ◽  
Building Materials ◽  
Phase Change Materials ◽  
Negative Impact ◽  
Concrete Strength ◽  
Clean Energy ◽  
Cementitious Materials ◽  
Supplementary Cementitious Materials ◽  
Sustainable Construction

The use of phase-change materials (PCM) in concrete has revealed promising results in terms of clean energy storage. However, the negative impact of the interaction between PCM and concrete on the mechanical and durability properties limits field applications, leading to a shift of the research to incorporate PCM into concrete using different techniques to overcome these issues. The storage of clean energy via PCM significantly supports the UN SDG 7 target of affordable and clean energy. Therefore, the present study focuses on three aspects: PCM type, the effect of PCM on concrete properties, and connecting the outcome of PCM concrete composite to the United Nations sustainable development goals (UN SDGs). The compensation of reduction in strength of PCM-contained concrete is possible up to some extent with the use of nanomaterials and supplementary cementitious materials. As PCM-incorporated concrete is categorized a type of building material, the large-scale use of this material will affect the different stages associated with building lifetimes. Therefore, in the present study, the possible amendments of the different associated stages of building lifetimes after the use of PCM-incorporated concrete are discussed and mapped in consideration of the UN SDGs 7, 11, and 12. The current challenges in the widespread use of PCM are lower thermal conductivity, the trade-off between concrete strength and PCM, and absence of the link between the outcome of PCM-concrete composite and UN SDGs. The global prospects of PCM-incorporated concrete as part of the effort to attain the UN SDGs as studied here will motivate architects, designers, practicing engineers, and researchers to accelerate their efforts to promote the consideration of PCM-containing concrete ultimately to attain net zero carbon emissions from building infrastructure for a sustainable future.

scholarly journals Energy efficiency of buildings with phase-change materials

2012 ◽  
Vol 10 (3) ◽  
pp. 343-352 ◽  
Author(s):  
Predrag Lukic ◽  
Jasmina Tamburic ◽  
Dragoslav Stojic
Keyword(s):  
Phase Change ◽  
Energy Efficient ◽  
Building Materials ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Thermal Environment ◽  
Latent Energy ◽  
Energy Efficient Buildings ◽  
Effective Form ◽  
Indoor Comfort

The construction of energy efficient buildings using innovative building materials such as phase change materials, in addition to improving indoor comfort, energy savings and costs, can be achieved by increasing their market value. Because of its ability to absorb and release energy at predictable temperatures, phase change materials are effective in controlling and maintaining the thermal environment in the building. The use of phase changing materials, materials stored latent energy storage is an effective form of heat.

Fabrication of Stearic Acid/Silicon Dioxide Composite Shape-Stabilized Phase Change Materials for Thermal Energy Storage

2014 ◽  
Vol 521 ◽  
pp. 609-612 ◽  
Author(s):  
Ying Chao Zhang
Keyword(s):  
Thermal Conductivity ◽  
Stearic Acid ◽  
Silicon Dioxide ◽  
Phase Change ◽  
Latent Heat ◽  
Mass Fraction ◽  
Phase Change Materials ◽  
Matrix Material ◽  
Filling Material ◽  
The Matrix

Stearic acid/silicon dioxide composite shape-stabilized phase change materials with different mass fraction of stearic acid have been successfully prepared using sol-gel methods. In such an organic/inorganic composite structure, the stearic acid was used as the filling material that is the latent heat storage phase change material (PCM), and the silicon dioxide acted as the matrix material which prevented the leakage of the melted stearic acid. The structure, morphology, thermal properties, thermal conductivity of the composite PCM were determined by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectra, Scanning electron microscope (SEM) and Differential scanning calorimetry (DSC). The results show that the form-stable composite PCM has the optimal effect, preventing the leakage of stearic acid from the matrix of silicon dioxide, emerges when the composite containing 50% (mass fraction) stearic acid. The latent heat and melting temperature of the corresponding composite PCM is measured as 85.7J/g and 52.2 °C respectively. Meanwhile, the thermal conductivity of the composite PCM could be improved effectively by using silicon dioxide as a supporting material.

scholarly journals Experimental Characterization of Phase Change Materials for Refrigeration Processes

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3033
Author(s):  
Anastasia Stamatiou ◽  
Lukas Müller ◽  
Roger Zimmermann ◽  
Jamie Hillis ◽  
David Oliver ◽  
...  
Keyword(s):  
Energy Density ◽  
Phase Change ◽  
Thermophysical Properties ◽  
Phase Change Materials ◽  
Cost Effective ◽  
Latent Heat Storage ◽  
Lower Energy Density ◽  
Change Material ◽  
Storage Units

Latent heat storage units for refrigeration processes are promising as alternatives to water/glycol-based storage due to their significantly higher energy densities, which would lead to more compact and potentially more cost-effective storages. In this study, important thermophysical properties of five phase change material (PCM) candidates are determined in the temperature range between −22 and −35 °C and their compatibility with relevant metals and polymers is investigated. The goal is to complement existing scattered information in literature and to apply a consistent testing methodology to all PCMs, to enable a more reliable comparison between them. More specifically, the enthalpy of fusion, melting point, density, compatibility with aluminum, copper, polyethylene (PE), polypropylene (PP), neoprene and butyl rubber, are experimentally determined for 1-heptanol, n-decane, propionic acid, NaCl/water mixtures, and Al(NO3)3/water mixtures. The results of the investigations reveal individual strengths and weaknesses of the five candidates. Further, 23.3 wt.% NaCl in water stands out for its very high volumetric energy density and n-decane follows with a lower energy density but better compatibility with surrounding materials and supercooling performance. The importance of using consistent methodologies to determine thermophysical properties when the goal is to compare PCM performance is highlighted.

Optimization of thermal conductivity in composites loaded with the solid-solid phase-change materials

2018 ◽  
Vol 25 (6) ◽  
pp. 1157-1165
Author(s):  
Taoufik Mnasri ◽  
Adel Abbessi ◽  
Rached Ben Younes ◽  
Atef Mazioud
Keyword(s):  
Thermal Conductivity ◽  
Phase Change ◽  
Phase Change Materials ◽  
Solid Phase ◽  
Spherical Inclusions ◽  
First Case ◽  
The Matrix ◽  
Composite Conductivity ◽  
First Time

AbstractThis work focuses on identifying the thermal conductivity of composites loaded with phase-change materials (PCMs). Three configurations are studied: (1) the PCMs are divided into identical spherical inclusions arranged in one plane, (2) the PCMs are inserted into the matrix as a plate on the level of the same plane of arrangement, and (3) the PCMs are divided into identical spherical inclusions arranged periodically in the whole matrix. The percentage PCM/matrix is fixed for all cases. A comparison among the various situations is made for the first time, thus providing a new idea on how to insert PCMs into composite matrices. The results show that the composite conductivity is the most important consideration in the first case, precisely when the arrangement plane is parallel with the flux and diagonal to the entry face. In the present work, we are interested in exploring the solid-solid PCMs. The PCM polyurethane and a wood matrix are particularly studied.

Phase-Change Materials and Building Energy Saving

2013 ◽  
Vol 683 ◽  
pp. 106-109
Author(s):  
Xiao Gang Zhao ◽  
Ying Pan
Keyword(s):  
Phase Change ◽  
Energy Saving ◽  
Phase Change Material ◽  
Building Materials ◽  
Phase Change Materials ◽  
Heat Storage ◽  
Building Energy ◽  
Storage Performance ◽  
Building Energy Saving ◽  
Change Material

Phase change materials, abbreviated as PCM, due to the excellent heat storage performance, have been used as building materials and got more and more attention in recent years. The article introduce the building application of phase change material, and discuss its contribution to the building energy saving.

scholarly journals A thermal energy storage composite by incorporating microencapsulated phase change material into wood

RSC Advances ◽  
2020 ◽  
Vol 10 (14) ◽  
pp. 8097-8103 ◽  
Author(s):  
Wenbin Wang ◽  
Huimin Cao ◽  
Jingyi Liu ◽  
Shifang Jia ◽  
Lin Ma ◽  
...  
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Phase Change Materials ◽  
Microencapsulated Phase Change Material ◽  
Microencapsulated Phase Change Materials ◽  
The Matrix ◽  
Change Material

Phase change energy storage wood (PCESW) was prepared by using microencapsulated phase change materials (MicroPCM) as thermal energy storage (TES) materials and wood as the matrix.

scholarly journals A research into the distribution of silicium dioxide nanoparticles in the mixing water

Vestnik MGSU ◽  
2020 ◽  
pp. 678-687
Author(s):  
Dmitry A. Nemuschenko ◽  
Vladimir V. Larichkin ◽  
Anastasiya P. Onipchenko ◽  
Vasilij S. Subbotin
Keyword(s):  
Building Materials ◽  
Ultrasonic Method ◽  
Matrix Material ◽  
Solid Particles ◽  
Chemical Compositions ◽  
Ultrasonic Dispersion ◽  
Nanoparticle Distribution ◽  
The Matrix ◽  
Silicium Dioxide ◽  
The Impact

Introduction. The co-authors studied suspensions of silicium dioxide nanoparticles in the water. The application of suspensions helps to most effectively add nanoparticles to slip ceramic mixtures and mixtures that contain concrete. A review of publications has proven that Russian and foreign researchers are willing to learn more about nanoparticles used to modify various materials. Particles having different chemical properties are applied depending on the types of problems to be solved. The method of ultrasonic dispersion of fillers in the matrix material is widely used; surfactants stabilize suspensions and mortars. Silicon dioxide, being one of the cheapest ultra-dispersed powders, has been proven as an active filler designated for building materials. Materials and methods. A method of ultrasonic dispersion was used to uniformly distribute nanoparticles in the water. A surfactant was added to the suspension to reduce the reaggregation of particles and to rise the stability of suspensions in the course of time. The turbidimetric method was employed to control the nanoparticle distribution efficiency in the suspension, and a spectrophotometer was used to identify the dimensions of solid particles by measuring the optical density. Results. The co-authors have proven the efficiency of the ultrasonic method in distributing nano-sized particles over the water. The suspensions, developed by the co-authors, were used to mold samples of ceramics; a scanning electron microscope and a nozzle, designated for the identification of chemical compositions, were used to identify dimensions of nanoparticle conglomerates in the matrix. The co-authors identified the concentration of OP-10 surfactant that was optimal for the destruction of conglomerates in the suspension; the impact of the ultrasonic treatment duration was assessed in respect of the suspension. Conclusions. The research findings can be contributed to ceramic production technologies for versatile nanoparticles to be employed to modify materials.

scholarly journals Thermal Performance of Resource-Efficient Geopolymeric Mortars Containing Phase Change Materials

2018 ◽  
Vol 12 (1) ◽  
pp. 217-233
Author(s):  
M. Kheradmand ◽  
F. Pacheco-Torgal ◽  
M. Azenha
Keyword(s):  
Phase Change ◽  
Thermal Performance ◽  
Phase Change Materials ◽  
Positive Impact ◽  
Performance Testing ◽  
Cost Effective ◽  
Small Scale ◽  
Heating And Cooling ◽  
Reduce Emissions ◽  
Cooling Loads

Background:Energy efficiency is not only the most cost effective way to reduce emissions but also a way to improve competitiveness and create employment. Geopolymeric mortars containing phase change materials-PCMs have a twofold positive impact concerning eco-efficiency. On one hand, the mortars are based on industrial waste contributing for resource efficiency. And on the other hand, PCM based mortars have the capacity to enhance the thermal performance of the buildings.Objective:This paper reports experimental results on the thermal performance of geopolymeric mortars containing different percentages of phase-change materials-PCMs.Method:Five groups of alkali-activated based mortars with different PCM percentages were produced and placed on a panel within a small scale prototype for thermal performance testing.Results:The results show that the thermal conductivity of the mortars decreased with the increase in the percentage of the PCM.Conclusion:Thermal performance of the PCM based mortars allowed for a stronger attenuation of the temperature amplitudes. Both for heating and cooling loads.

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