Thermal enhancement of plastering mortars with Phase Change Materials: Experimental and numerical approach

Sá, Ana Vaz; Azenha, Miguel; Sousa, Hipólito; Samagaio, António

doi:10.1016/j.enbuild.2012.02.031

Cited by 137 publications

(45 citation statements)

References 23 publications

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“…This can be proved by the decrease of daily temperature amplitude inside the laboratory-scale prototypes coated with PCM mortars (Table 4). It was observed a minimum and a maximum difference in the daily temperature amplitude of 3ºC and 6ºC, which is consistent with other studies (Kheradmand et al 2016;Sá et al 2012).…”

Section: Thermal Behaviorsupporting

confidence: 93%

Mortars with Incorporation of Phase Change Materials for Thermal Rehabilitation

Cunha

Aguiar

Ferreira

2016

International Journal of Architectural Heritage

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The thermal rehabilitation is an opportunity to reach higher levels of energetic performance, reducing the high energetic dependence of the countries. Rehabilitation operations based in the utilization of materials with the capability to store and release energy contribute to obtain more energy efficient buildings. Combining the use of smart materials with temperature control capability and renewable energy sources, it is possible to increase the thermal comfort inside the buildings. The main purpose of this study was the physical, mechanical, and thermal characterization of mortars based in specific binders for rehabilitation with incorporation of phase change materials (PCM). Mortars without and with incorporation of PCM were studied. It was observed that the incorporation of PCM in mortars caused differences in the physical and mechanical properties and improved their thermal behavior, reducing the extreme temperatures and decreasing the heating and cooling needs.

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Section: Thermal Behaviorsupporting

confidence: 93%

Mortars with Incorporation of Phase Change Materials for Thermal Rehabilitation

Cunha

Aguiar

Ferreira

2016

International Journal of Architectural Heritage

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“…As argamassas com incorporação de materiais de mudança de fase (PCM) aparecem como uma possível solução, na tentativa de resolver, ou pelo menos minimizar, o consumo energético relacionado com os edifícios. A utilização destes materiais permite a regulação da flutuação de temperatura no interior dos edifícios, mantendo-a mais perto da faixa de temperatura desejada, durante um período de tempo mais longo, reduzindo a necessidade de utilizar um equipamento de climatização [1][2][3]. Esta técnica permite obter edifícios com parâmetros de conforto superiores, melhorando as condições de vida dos ocupantes e sem qualquer dano para o meio ambiente.…”

Section: Introductionunclassified

Classificação de argamassas com incorporação de materiais de mudança de fase com base nas suas propriedades físicas, mecânicas e térmicas

et al. 2019

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RESUMOActualmente, existem várias argamassas disponiveis para aplicação na industria da construção. Estas argamassas podem ser baseadas em diferentes ligantes, possuir diferentes propriedades fisicas e mecânicas e até mesmo outras propriedades especificas. Contudo, a correta selecção de uma argamassa torna-se cada vez mais dificil. Assim, surge a necessidade de classificar diferentes argamassas com base em critérios especificos e num procedimento único. Desta forma, será possivel identificar as argamassas mais apropriadas de acordo com a sua função. Neste trabalho foi utilizado um procedimento de classificação de materiais desenvolvido por Czarnecki e Lukowski, com base numa função de usabilidade. O procedimento de classificação transforma os resultados experimentais de várias propriedades num único valor numérico. Desta forma, os produtos de construção podem ser classificados de acordo com as suas propriedades individuais ou uma combinação optimizada de várias propriedades. Assim, o principal objectivo deste estudo consiste na classificação de argamassas à base de diferentes ligantes com incorporação de materiais de mudança de fase (PCM). Os ligantes estudados foram a cal hidráulica, gesso e cimento. Para cada ligante foram desenvolvidas três argamassas distintas, uma argamassa de referência (0% PCM), uma argamassa com incorporação de 40% de PCM e uma argamassa com incorporação de 40% de PCM e 1% de fibras. Com base nos resultados foi possivel concluir que a incorporação de PCM afecta o desempenho global das argamassas.Palavras-chave: Argamassas, Materiais de mudança de fase (PCM), Propriedades mêcanicas, Propriedades físicas, Propriedades térmicas. ABSTRACTCurrently, there are several mortars available for application in the construction industry. These mortars can be based on different binders, have different physical and mechanical properties and even other specific properties. However, the correct selection of a mortar becomes increasingly difficult. Thus, comes up the need to classify different mortars based on a specific criteria and a single procedure. In this way, it will be possible to identify the most appropriate mortars according to their function. In this research, a materials ranking procedure developed by Czarnecki and Lukowski is applied, based on an usability function. The ranking procedure transforms experimental results of properties into one numerical value. The products can be classified according to their individual properties or even an optimized combination of different properties. Thus, the main purpose of this study was the ranking of mortars based in different binders with incorporation CUNHA, S.; AGUIAR, J.; FERREIRA, V.; TADEU, A. revista Matéria, v.24, n.2, 2019. of phase change materials. Hydraulic lime, gypsum and cement were the binders studied. For each binder, three different mortars were developed, reference mortars (0% PCM), mortars with incorporation of 40% of PCM and mortars with incorporation of 40% of PCM and 1% of fibers. Based on the results it was possible to conclu...

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“…However, in the previous research, the PCM layer was usually placed close to the indoor environment. For example, a wallboard immersed with PCMs was placed on the interior surface of the wall [12][13][14][15][16]. Other locations for a PCM layer, such as close to the exterior surface of the wall [17], or next to the internal face of gypsum board [18], or within the insulation cavity [19] have appeared in the literature.…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis for the optimal location of a thin PCM layer in frame walls

Jin

Medina

Zhang

2016

Applied Thermal Engineering

169

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The thermal performance of building walls can be improved using phase change materials (PCMs). The objective of this study was to estimate the optimal location of a "thin" PCM layer to be incorporated into frame walls, parallel to the frame and insulation, for the purpose of increasing thermal mass and reducing peak heat fluxes across the wall. Based on a mathematical model built in this paper, it was found that an optimal location of this "thin" PCM layer can be estimated, and it was affected by the thermal properties of PCM and the environmental conditions.

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Thermal enhancement of plastering mortars with Phase Change Materials: Experimental and numerical approach

Cited by 137 publications

References 23 publications

Mortars with Incorporation of Phase Change Materials for Thermal Rehabilitation

Mortars with Incorporation of Phase Change Materials for Thermal Rehabilitation

Classificação de argamassas com incorporação de materiais de mudança de fase com base nas suas propriedades físicas, mecânicas e térmicas

Numerical analysis for the optimal location of a thin PCM layer in frame walls

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