Influence of Adding Encapsulated Phase Change Materials in Aerial Lime Based Mortars

Increasingly in a society with a high growth rate and standards of comfort, the need to minimize the currently high energy consumption by taking advantage of renewable energy sources arises. The mortars with incorporation of phase change materials (PCM) have the ability to regulate the temperature inside buildings, contributing for an increase in the level of thermal comfort and reduction of the use of heating, ventilation and air conditioning (HVAC) equipment, using only the energy supplied by the sun. However, the incorporation of PCM in mortars modifies some of its characteristics. Therefore, the main objective of this study was the characterization of mortars doped with two different phase change materials. Specific properties of different PCM, such as particle size, shape and enthalpy were studied, as well as the properties of the fresh and hardened state of these mortars. Nine different compositions were developed which were initially doped with microcapsules of PCM A and subsequently doped with microcapsules of PCM B. It was possible to observe that the incorporation of phase change materials in mortars causes differences in properties such as compressive strength, flexural strength and shrinkage. After the study of the behaviour of these mortars with the incorporation of two different phase change materials, it was possible to select the composition with a better compromise between its aesthetic appearance, physical and mechanical characteristics.

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Mortars with Phase Change Materials - Part I: Physical and Mechanical Characterization

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.634.22 ◽

2014 ◽

Vol 634 ◽

pp. 22-32 ◽

Cited By ~ 8

Author(s):

Sandra Cunha ◽

José Aguiar ◽

Victor Ferreira ◽

António Tadeu ◽

Andrzej Garbacz

Keyword(s):

Phase Change ◽

Phase Change Materials ◽

Renewable Energy Sources ◽

High Growth ◽

High Energy ◽

High Growth Rate ◽

Hydraulic Lime ◽

Heating And Cooling ◽

Hardened State ◽

Different Content

In a society with a high growth rate and increased standards of comfort arises the need to minimize the currently high energy consumption by taking advantage of renewable energy sources. The mortars with incorporation of phase change materials (PCM) have the ability to regulate the temperature inside buildings, contributing to the thermal comfort and reduction of the use of heating and cooling equipment, using only the energy supplied by the sun. However, the incorporation of phase change materials in mortars modifies its characteristics. The main purpose of this study was the production and characterization in the fresh and hardened state of mortars with incorporation of different contents of PCM in mortars based in different binders. The binders studied were aerial lime, hydraulic lime, gypsum and cement. For each type of binder, different mortars were developed with different content of PCM. The proportion of PCM studied was 0%, 20%, 40% and 60% of the mass of the sand. It was possible to observe that the incorporation of PCM in mortars caused differences in properties such as workability, microstructure, compressive strength, flexural strength and adhesion.

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Mortars with Phase Change Materials: Contribute to Sustainable Construction

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.634.3 ◽

2014 ◽

Vol 634 ◽

pp. 3-13 ◽

Cited By ~ 4

Author(s):

José Aguiar ◽

Sandra Cunha ◽

Mohammad Kheradmand

Keyword(s):

Phase Change ◽

Phase Change Materials ◽

Renewable Energy Sources ◽

High Growth ◽

High Energy ◽

High Growth Rate ◽

Sustainable Construction ◽

Heating And Cooling ◽

High Energy Consumption ◽

Physical And Mechanical Characteristics

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Sustainable Mortars with Incorporation of Microencapsulated Phase Change Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1129.621 ◽

2015 ◽

Vol 1129 ◽

pp. 621-628 ◽

Cited By ~ 1

Author(s):

Sandra Cunha ◽

José Aguiar ◽

Kamil Zalegowski ◽

Andrzej Garbacz ◽

Patrícia Soares ◽

...

Keyword(s):

Fly Ash ◽

Phase Change ◽

Phase Change Materials ◽

Raw Materials ◽

Renewable Energy Sources ◽

High Energy ◽

Hydraulic Lime ◽

Heating And Cooling ◽

Microencapsulated Phase Change Materials ◽

Hardened State

The construction industry is responsible for high energy and raw materials consumption. Thus, it is important to minimize the high energy consumption by taking advantage of renewable energy sources and reusing industrial waste, decreasing the extraction of natural materials. The mortars with incorporation of phase change materials (PCM) have the ability to regulate the temperature inside buildings, contributing to the thermal comfort and reduction of the use of heating and cooling equipment, using only the energy supplied by the sun. The simultaneous incorporation of PCM and fly ash (FA) can reduce the energetic consumption and the amount of materials landfilled. However, the addition of these materials in mortars modifies its characteristics. The main purpose of this study was the production and characterization in the fresh and hardened state of mortars with incorporation of different contents of PCM and FA. The binders studied were aerial lime, hydraulic lime, gypsum and cement. The proportion of PCM studied was 0%, 20%, 40% and 60% of the mass of the sand. The content of fly ash added to the mortars was 0%, 20%, 40% and 60% of the mass of the binder. It was possible to observe that the incorporation of PCM and fly ash in mortars caused differences in properties such as workability, microstructure, water absorption, compressive strength, flexural strength and adhesion.

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Thermal Dynamic Behavior in Bi-Zone Habitable Cell with and without Phase Change Materials

Proceedings ◽

10.3390/proceedings2020063041 ◽

2020 ◽

Vol 63 (1) ◽

pp. 41

Author(s):

Hanae El Fakiri ◽

Lahoucine Ouhsaine ◽

Abdelmajid El Bouardi

Keyword(s):

Thermal Behavior ◽

Thermal Comfort ◽

Phase Change ◽

Dynamic Behavior ◽

Phase Change Materials ◽

Energy Performance ◽

High Energy ◽

Water Heater ◽

Simplified Modeling

The thermal dynamic behavior of buildings represents an important aspect of the energy efficiency and thermal comfort of the indoor environment. For this, phase change material (PCM) wallboards integrated into building envelopes play an important role in stabilizing the temperature of the human comfort condition. This article provides an assessment of the thermal behavior of a “bi-zone” building cell, which was built based on high-energy performance (HEP) standards and heated by a solar water heater system through a hydronic circuit. The current study is based on studying the dynamic thermal behavior, with and without implantation of PCMs on envelope structure, using a simplified modeling approach. The evolution of the average air temperature was first evaluated as a major indicator of thermal comfort. Then, an evaluation of the thermal behavior’s dynamic profile was carried out in this study, which allowed for the determination of the PCM rate anticipation in the thermal comfort of the building cell.

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Synthesis and characterization of comb‐like crosslinking polyurethane based form‐stable phase‐change materials for thermal energy storage

Polymers for Advanced Technologies ◽

10.1002/pat.5425 ◽

2021 ◽

Author(s):

Yunyun Yang ◽

Weibo Kong ◽

Xufu Cai

Keyword(s):

Energy Storage ◽

Phase Change ◽

Thermal Energy ◽

Thermal Energy Storage ◽

Phase Change Materials ◽

Synthesis And Characterization ◽

Stable Phase

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Experimental Characterization of Phase Change Materials for Refrigeration Processes

Energies ◽

10.3390/en14113033 ◽

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.

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Characterization of Unripe and Mature Avocado Seed Oil in Different Proportions as Phase Change Materials and Simulation of Their Cooling Storage

Molecules ◽

10.3390/molecules26010107 ◽

2020 ◽

Vol 26 (1) ◽

pp. 107

Author(s):

Evelyn Reyes-Cueva ◽

Juan Francisco Nicolalde ◽

Javier Martínez-Gómez

Keyword(s):

Phase Change ◽

Phase Change Materials ◽

Seed Oil ◽

Energy System ◽

Maturity Stage ◽

Natural Environments ◽

Renewable Materials ◽

Scanning Calorimetry ◽

Avocado Seed

Environmental problems have been associated with energy consumption and waste management. A solution is the development of renewable materials such as organic phase change materials. Characterization of new materials allows knowing their applications and simulations provide an idea of how they can developed. Consequently, this research is focused on the thermal and chemical characterization of five different avocado seed oils depending on the maturity stage of the seed: 100% unripe, 25% mature-75% unripe, 50% mature-50% unripe, 75% mature-25% unripe, and 100% mature. The characterization was performed by differential scanning calorimetry, Fourier transform infrared spectroscopy, and thermogravimetric analysis. The best oil for natural environments corresponded to 100% matured seed with an enthalpy of fusion of 52.93 J·g−1, and a degradation temperature between 241–545 °C. In addition, the FTIR analysis shows that unripe seed oil seems to contain more lipids than a mature one. Furthermore, a simulation with an isothermal box was conducted with the characterized oil with an initial temperature of −14 °C for the isothermal box, −27 °C for the PCM box, and an ambient temperature of 25 °C. The results show that without the PCM the temperature can reach −8 °C and with it is −12 °C after 7 h, proving its application as a cold thermal energy system.

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