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.

Energy refurbishment of existing buildings through the use of phase change materials: Energy savings and indoor comfort in the cooling season

2014 ◽  
Vol 113 ◽  
pp. 990-1007 ◽  
Author(s):  
Fabrizio Ascione ◽  
Nicola Bianco ◽  
Rosa Francesca De Masi ◽  
Filippo de’ Rossi ◽  
Giuseppe Peter Vanoli
Keyword(s):  
Phase Change ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Existing Buildings ◽  
Indoor Comfort

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 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.

Diatomite/Palm Wax Composite as a Phase Change Material for Latent Heat Storage

2015 ◽  
Vol 1126 ◽  
pp. 33-38 ◽  
Author(s):  
Jan Fořt ◽  
Anton Trník ◽  
Milena Pavlíková ◽  
Zbyšek Pavlík
Keyword(s):  
Phase Change ◽  
Latent Heat ◽  
Building Materials ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Heat Storage ◽  
Vacuum Impregnation ◽  
Impregnation Method ◽  
Latent Heat Storage ◽  
Polymer Encapsulation

Wider application of commercially produced phase change materials in production of building composites is limited due to their higher price and the inert polymer encapsulation which negatively affects mechanical parameters. This paper is focused on preparation of the composite material for energy savings. The phase change composite is prepared by soaking palm wax into the structure of diatomite powder using vacuum impregnation method. The compatibility of diatomite and palm wax in a newly developed PCM structure is investigated by FTIR spectroscopy. The improved thermal storage properties obtained by DSC analysis reveal melting temperature at 55.9°C and the phase change latent heat of 78.0 J/g. The laser diffraction based devise is used to determine the particle size distribution in order to assess the suitability of the developed wax/diatomite based composite for the cement based building materials. The obtained results indicate promising results from the point of view of improved latent heat storage at reasonable cost.

Research on the Application and Energy-Saving Assessment of Phase Change Materials in Intelligence Architectural

2013 ◽  
Vol 416-417 ◽  
pp. 1741-1745 ◽  
Author(s):  
Yong Hua Jing
Keyword(s):  
Phase Change ◽  
Energy Saving ◽  
Building Materials ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Building Energy ◽  
Heating And Cooling ◽  
Good Energy ◽  
Building Energy Saving ◽  
Change Material

The paper research building energy-saving technologies, in particular, phase change materials and traditional building materials combined into a new building material with a heat storage and heat. It has the energy density and the approximate constant temperature exothermic absorption, etc., can effectively maintain the comfort of the environment and reduce building heating and cooling energy consumption and costs. By collecting and analyzing the data in the the Model room temperature under infrared lamp irradiation, found that compared with the model of the phase change material without adding room, both the peak temperature of the maximum differential is 1.70 °C, the energy-saving efficiency up to 27.56%, with good energy savings.

Experimental and numerical investigation of phase change materials with finned encapsulation for energy-efficient buildings

2010 ◽  
Vol 3 (4) ◽  
pp. 245-254 ◽  
Author(s):  
Kalaiselvam Siva ◽  
Marcel Xavier Lawrence ◽  
G. R. Kumaresh ◽  
Parameshwaran Rajagopalan ◽  
Harikrishnan Santhanam
Keyword(s):  
Phase Change ◽  
Numerical Investigation ◽  
Energy Efficient ◽  
Phase Change Materials ◽  
Energy Efficient Buildings

scholarly journals Energy Saving and Charging Discharging Characteristics of Multiple PCMs Subjected to Internal Air Flow

Fluids ◽  
2021 ◽  
Vol 6 (8) ◽  
pp. 275
Author(s):  
Ahmed J. Hamad
Keyword(s):  
Phase Change ◽  
Energy Saving ◽  
Air Temperature ◽  
Temperature Control ◽  
Phase Change Materials ◽  
Energy Savings ◽  
Heating System ◽  
Air Heating ◽  
Room Model ◽  
Model Temperature

One essential utilization of phase change materials as energy storage materials is energy saving and temperature control in air conditioning and indirect solar air drying systems. This study presents an experimental investigation evaluating the characteristics and energy savings of multiple phase change materials subjected to internal flow in an air heating system during charging and discharging cycles. The experimental tests were conducted using a test rig consisting of two main parts, an air supply duct and a room model equipped with phase change materials (PCMs) placed in rectangular aluminum panels. Analysis of the results was based on three test cases: PCM1 (Paraffin wax) placed in the air duct was used alone in the first case; PCM2 (RT–42) placed in the room model was used alone in the second case; and in the third case, the two PCMs (PCM1 and PCM2) were used at the same time. The results revealed a significant improvement in the energy savings and room model temperature control for the air heating system incorporated with multiple PCMs compared with that of a single PCM. Complete melting during the charging cycle occurred at temperatures in the range of 57–60 °C for PCM1 and 38–43 °C for PCM2, respectively, thereby validating the reported PCMs’ melting–solidification results. Multiple PCMs maintained the room air temperature at the desired range of 35–45.2 °C in the air heating applications by minimizing the air temperature fluctuations. The augmentation in discharging time and improvement in the room model temperature using multiple PCMs were about 28.4% higher than those without the use of PCMs. The total energy saving using two PCMs was higher by about 29.5% and 46.7% compared with the use of PCM1 and PCM2, respectively. It can be concluded that multiple PCMs have revealed higher energy savings and thermal stability for the air heating system considered in the current study.

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