scholarly journals Just a Phase?  Assessment of the Potential for Phase Change Materials in New Zealand Buildings

2021 ◽  
Author(s):  
◽  
Alice Harland
Keyword(s):  
New Zealand ◽  
Phase Change ◽  
Building Materials ◽  
Phase Change Materials ◽  
Successful Outcome ◽  
Market Penetration ◽  
Office Design ◽  
Modelling Studies ◽  
History Of ◽  
Save Energy

<p>Phase change materials in buildings could save energy and cost by bridging the gap between when energy is available and when it is needed. This is because they are capable of storing and releasing large amounts of energy by melting and solidifying at an appropriate temperature for use in buildings. Yet, despite being in development for decades, PCM building materials have not achieved significant market penetration. This thesis investigates ways in which Phase Change Materials have been used in buildings in the past and what products are currently available. The investigation suggests that because of cost these materials might be appropriately applied to commercial interiors. It explores the history of office design internationally and in New Zealand and suggests alternative ways in which PCM materials could be used that would be attractive to designers and architects. By assessing the results of two modelling studies this research is able to suggest at what cost these products may become viable. The thesis concludes that market penetration unlikely to change significantly unless one or more of the following occur; A significantly cheaper, and sustainable, PCM is found Domestic electricity prices rise so dramatically that the potential 20% space heating saving accruing from PCMs becomes far more significant A level of design value is added to the development of PCM products in order to attract a wider market In the making of low energy and sustainable buildings it has been recognised that a multi-disciplinary approach is vital for a successful outcome, and it would seem logical that same would be true of developing new products towards the goal of sustainability. Designers and engineers must work collaboratively to create desirable products and accurate and validated information about their performance in buildings is needed for architects to persuade clients to use new materials and take the lead in the process of achieving majority acceptance. Despite previous international research, these studies show that in New Zealand PCM application has more benefit in residential applications than in the commercial sector.</p>

scholarly journals Just a Phase?  Assessment of the Potential for Phase Change Materials in New Zealand Buildings

2021 ◽  
Author(s):  
◽  
Alice Harland
Keyword(s):  
New Zealand ◽  
Phase Change ◽  
Building Materials ◽  
Phase Change Materials ◽  
Successful Outcome ◽  
Market Penetration ◽  
Office Design ◽  
Modelling Studies ◽  
History Of ◽  
Save Energy

<p>Phase change materials in buildings could save energy and cost by bridging the gap between when energy is available and when it is needed. This is because they are capable of storing and releasing large amounts of energy by melting and solidifying at an appropriate temperature for use in buildings. Yet, despite being in development for decades, PCM building materials have not achieved significant market penetration. This thesis investigates ways in which Phase Change Materials have been used in buildings in the past and what products are currently available. The investigation suggests that because of cost these materials might be appropriately applied to commercial interiors. It explores the history of office design internationally and in New Zealand and suggests alternative ways in which PCM materials could be used that would be attractive to designers and architects. By assessing the results of two modelling studies this research is able to suggest at what cost these products may become viable. The thesis concludes that market penetration unlikely to change significantly unless one or more of the following occur; A significantly cheaper, and sustainable, PCM is found Domestic electricity prices rise so dramatically that the potential 20% space heating saving accruing from PCMs becomes far more significant A level of design value is added to the development of PCM products in order to attract a wider market In the making of low energy and sustainable buildings it has been recognised that a multi-disciplinary approach is vital for a successful outcome, and it would seem logical that same would be true of developing new products towards the goal of sustainability. Designers and engineers must work collaboratively to create desirable products and accurate and validated information about their performance in buildings is needed for architects to persuade clients to use new materials and take the lead in the process of achieving majority acceptance. Despite previous international research, these studies show that in New Zealand PCM application has more benefit in residential applications than in the commercial sector.</p>

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.

The Effect of Phase Change Materials on the Physical, Thermal and Mechanical Properties of Cement

Sci ◽  
2019 ◽  
Vol 1 (1) ◽  
pp. 27 ◽  
Author(s):  
Zakaria Dakhli ◽  
Khaled Chaffar ◽  
Zoubeir Lafhaj
Keyword(s):  
Phase Change ◽  
Development Strategy ◽  
Phase Change Materials ◽  
Materials Science ◽  
Current Trend ◽  
Building Construction ◽  
Concrete Mixtures ◽  
Materials Used ◽  
Save Energy ◽  
Change Material

When focusing on materials science in civil engineering, the current trend is to investigate the use of innovative solutions in order to enhance thermal and energy performances. This trend is amplified with the need for a sustainable development strategy for the construction sector. This paper assesses the integration of a Phase Change Material (PCM) in cement intended for building construction. The key characteristic of PCMs is their capacity to absorb energy and restore it. In building construction, this feature could be harnessed to save energy by incorporating PCMs in the materials used. In this study, passive integration of PCM in cement was tested and thermal properties of such an integration was assessed. The results provide insights into how PCMs affect cement as part of the concrete mixture, thus identifying the contribution of PCM-based cements in concrete mixtures.

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.

Preparation of Phase Change Building Materials

2010 ◽  
Vol 96 ◽  
pp. 161-164
Author(s):  
Hai Jian Li ◽  
Zhi Jiang Ji ◽  
Zhi Jun Xin ◽  
Jing Wang
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Phase Change ◽  
Building Materials ◽  
Phase Change Materials ◽  
Absorption Method ◽  
Scanning Calorimetry ◽  
Steady Temperature ◽  
Scanning Electron ◽  
High Latent Heat

The types and characteristics of phase change materials were discussed. With respect to application in building materials, the PCM should have more attractive properties including high latent heat values, stability and proper melting point, inflammability, corrosiveness and supercooling. Phase change building material (PCBM) was prepared using vacuum absorption method and tested by means of Differential Scanning Calorimetry(DSC) and Scanning Electron Microscopy(SEM). The testing results have shown that organic PCM was absorbed into the holes of inorganic carriers completely and distributed evenly with stable performances. It is concluded that the composite PCM has steady temperature-adjusting function and the preparation means is acceptable.

scholarly journals Characterization of MgCl2·6H2O-Based Eutectic/Expanded Perlite Composite Phase Change Material with Low Thermal Conductivity

Materials ◽  
2018 ◽  
Vol 11 (12) ◽  
pp. 2369 ◽  
Author(s):  
Chao Zhang ◽  
Zeyu Zhang ◽  
Rongda Ye ◽  
Xuenong Gao ◽  
Ziye Ling
Keyword(s):  
Thermal Conductivity ◽  
Phase Separation ◽  
Phase Change ◽  
Phase Change Materials ◽  
Impregnation Method ◽  
Expanded Perlite ◽  
Thermal Reliability ◽  
Low Thermal Conductivity ◽  
Human Thermal Comfort ◽  
Save Energy

The melting points of the phase change materials (PCMs) incorporated into the walls of buildings should be within the human thermal comfort temperature range. In this paper, 15 wt.% of MgCl2·6H2O was mixed with CaCl2·6H2O to obtain the eutectic with a melting point of 23.9 °C. SrCl2·6H2O suppresses the supecooling of the eutectic. The combination with expanded perlite (EP) via the impregnation method overcomes the phase separation and liquid leakage of the CaCl2∙6H2O-MgCl2∙6H2O mixture. The composite PCM is form-stable with the maximum loading mass fraction up to 50 wt.% and latent heat of 73.55 J/g. EP also significantly reduces the thermal conductivity of the CaCl2∙6H2O-MgCl2∙6H2O from 0.732 to 0.144 W/(m·K). The heating-cooling cycling test reveals that the composite PCM is thermally stable. The cheap eutectic salt hydrate, with little supercooling, no phase separation and liquid leakage, low thermal conductivity and good thermal reliability, show great potential as envelope materials to save energy consumption in buildings.

Investigation Progress of Phase Change Building Materials

2014 ◽  
Vol 672-674 ◽  
pp. 1828-1832
Author(s):  
Hai Yang Ni ◽  
Xiao Qin Zhu ◽  
Jin Hu ◽  
Yu Bie ◽  
Liang Chen ◽  
...  
Keyword(s):  
Energy Consumption ◽  
Thermal Comfort ◽  
Phase Change ◽  
Energy Saving ◽  
Building Materials ◽  
Phase Change Materials ◽  
Structure And Function ◽  
Heating Energy Consumption ◽  
And Function ◽  
Important Significance

Phase change building materials are a category of building materials with the integration of structure and function, which can be achieved by phase change materials composite with the traditional building materials. They have such characteristics as the improvement of energy saving efficiency in buildings, the decrease of heating energy consumption and the adjustment of thermal comfort in the room environment etc. Therefore, phase change building materials are one of the most efficient means of energy utilizations, which has important significance for promoting their investigation and applications of energy saving in buildings.

scholarly journals Determination of effective specific heat capacity of interior plaster containing phase change materials

2019 ◽  
Vol 282 ◽  
pp. 02052
Author(s):  
Václav Kočí ◽  
Jiří Maděra ◽  
Robert Černý
Keyword(s):  
Heat Capacity ◽  
Phase Change ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Building Materials ◽  
Phase Change Materials ◽  
Calorimetric Data ◽  
Thermal Oscillation ◽  
Effective Specific Heat

A precise technique for determination of effective specific heat capacity of building materials is presented within this paper. The applicability of the technique is demonstrated on a PCM-enhanced plaster, being characterized by a phase change between 15 and 30 °C. The effective specific heat capacity is determined by means of inverse analysis of calorimetric data using computational model of the device. The identified effective specific heat capacity values reached up to 1890 J·kg-1·K-1 when cooled and 1580 J·kg-1·K-1 when heated. Using this quantity in simulation of thermal performance, the PCM-enhanced plaster showed to have a promising potential to be used in buildings’ interiors as a thermal regulator to stabilize inner environment as it contributed to a thermal oscillation decrease by up to 2.5 °C

scholarly journals A NUMERICAL SOLUTION THAT DETERMINES THE TEMPERATURE FIELD INSIDE PHASE CHANGE MATERIALS: APPLICATION IN BUILDINGS

2013 ◽  
Vol 19 (4) ◽  
pp. 518-528 ◽  
Author(s):  
Giuseppina Ciulla ◽  
Valerio Lo Brano ◽  
Antonio Messineo ◽  
Giorgia Peri
Keyword(s):  
Phase Change ◽  
Numerical Solution ◽  
Building Materials ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Transfer Problem ◽  
Energy Performance ◽  
Wall Layer ◽  
Storage Device ◽  
Thermal Mass

The use of novel building materials that contain active thermal components would be a major advancement in achieving significant heating and cooling energy savings. In the last 40 years, Phase Change Materials or PCMs have been tested as thermal mass components in buildings, and most studies have found that PCMs enhance the building energy performance. The use of PCMs as an energy storage device is due to their relatively high fusion latent heat; during the melting and/or solidification phase, a PCM is capable of storing or releasing a large amount of energy. PCMs in a wall layer store solar energy during the warmer hours of the day and release it during the night, thereby decreasing and shifting forward in time the peak wall temperature. In this paper, an algorithm is presented based on the general Fourier differential equations that solve the heat transfer problem in multi-layer wall structures, such as sandwich panels, that includes a layer that can change phase. In detail, the equations are proposed and transformed into formulas useful in the FDM approach (finite difference method), which solves the system simultaneously for the temperature at each node. The equation set proposed is accurate, fast and easy to integrate into most building simulation tools in any programming language. The numerical solution was validated using a comparison with the Voller and Cross analytical test problem.

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