Latent heat storage in concrete

Hawes, D.W.; Banu, D.; Feldman, D.

doi:10.1016/0165-1633(89)90014-2

Cited by 132 publications

(62 citation statements)

References 4 publications

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“…PCMs are materials which have high heat of fusion which is able, by melting and solidifying at a certain temperature, to store and dissipate large amounts of energy in the form of heat [22]. Numerous research studies have been devoted to use of PCMs in cementitious materials to increase the energy efficiency of buildings [23,24]. For use in cold regions, it has been proposed that suitable PCMs can increase freeze-thaw resistance of concrete [25,26] and melt ice and snow on concrete pavements [27].…”

Section: Introductionmentioning

confidence: 99%

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Šavija

Luković

Kotteman

et al. 2017

Int J Adv Eng Sci Appl Math

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In the past two decades, much research has been devoted to overcoming the inherent brittleness of cementitious materials. To that end, several solutions have been proposed, mainly utilizing fibres. One of the most promising classes of materials is strain hardening cementitious composite (SHCC). It utilizes PVA fibres, and it is relatively costly compared to regular concrete, so it is commonly used only in surface layers. In this paper, a multi-functional ductile cementitious composite based on SHCC has been developed. It uses microencapsulated phase change materials (PCMs), capable of reducing temperature fluctuations in the material due to their high heat of fusion. It is shown that, although addition of microencapsulated PCMs are detrimental to compressive strength, they have very little effect on the flexural strength and deflection capacity. In the future work, mixtures with higher PCM contents will be developed in order to exploit their heat storage capability better. This material has potential to reduce temperature effects on concrete surfaces, while at the same time being extremely ductile.

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Section: Introductionmentioning

confidence: 99%

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Šavija

Luković

Kotteman

et al. 2017

Int J Adv Eng Sci Appl Math

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“…No método de imersão, os produtos de construção são mergulhados numa solução de PCM líquido, de forma a absorver o material por capilaridade. No entanto, o PCM pode interferir com os produtos de hidratação dos materiais de construção e afetar as propriedades mecânicas e de durabilidade [9]. A estabilização do PCM pode ser realizada através da sua integração num material de apoio [10].…”

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Comportamento térmico de argamassas com incorporação de Materiais de Mudança de Fase (PCM) no clima português

2017

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RESUMOAtualmente, os elevados consumos energéticos constituem uma das maiores preocupações da sociedade e da comunidade científica. A União Europeia definiu várias estratégias para atenuar este problema até 2020, passando pela redução das emissões de CO 2 , redução do consumo de energia primária e aumento do consumo de energia proveniente de fontes renováveis. O sector da construção é responsável por elevados consumos energéticos durante a fase de construção e utilização dos edifícios. Assim, torna-se importante utilizar soluções construtivas funcionais, que minimizem os consumos energéticos nos edifícios. A incorporação de materiais de mudança de fase (PCM) em materiais de construção permite a regulação da temperatura no interior dos edifícios com recurso à sua capacidade de armazenamento e libertação de energia. Desta forma, o principal objetivo deste estudo consistiu na caracterização do desempenho térmico de argamassas com incorporação de microcápsulas de PCM e comparação com argamassas de referência (0% PCM). Para tal, foram desenvolvidas 8 composições distintas, à base de diferentes ligantes, sendo estes a cal aérea, cal hidráulica, cimento e gesso. Para cada ligante foi desenvolvida uma composição de referência (0% PCM) e uma composição com incorporação de 40% de PCM, em substituição da massa de agregado. As propriedades avaliadas foram a trabalhabilidade, microestrutura, comportamento mecânico e desempenho térmico. Foi possível observar que a utilização de microcápsulas de PCM em argamassas contribui para uma melhoria da eficiência energética dos edifícios, através da diminuição das temperaturas extremas, do desfasamento temporal das temperaturas extremas e da diminuição das necessidades de climatização dos edifícios.Palavras-chave: Argamassas, material de mudança de fase, microestrutura, comportamento térmico. ABSTRACTNowadays, the high energetic consumption is one of the biggest concerns of the modern society and scientific community. The European Union defined strategies for 2020 in order to reduce this problem, through the decrease of CO 2 emissions, decrease the primary energy consumption and increase the energy consumption from renewable sources. The construction sector is responsible for high energetic consumptions during the production and utilization of buildings. Thus, it becomes important to use constructive solutions that allow minimize the energy consumption in buildings. The incorporation of phase change materials (PCM) in construction materials allows regulate the temperature inside the buildings, due to their capability of storage and release energy. The main objective of this study was to characterize the thermal performance of mortars with incorporation of PCM microcapsules. It were developed 8 different compositions based in different binders. The studied binders were aerial lime, hydraulic lime, cement and gypsum. For each binder a reference mortar (0% PCM) and a mortar with incorporation of 40% of PCM were developed. It was evaluated properties such as workability, microstructure, me...

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“…Another issue that is critical when introducing PCM in the concrete is the manner the PCM is incorporated to the building element. In the previous investigations it can be found that PCM used to be directly incorporated to the mix or if not encapsulated also immersed Hawes (1989). In the study presented in this paper, PCM used for casting the concrete elements is the microencapsulated PCM type DS 5040X from BASF with melting temperature of 23⁰C.…”

Section: Introductionmentioning

confidence: 99%

“…Then, in 1940`s, research in the field of latent heat storage in the buildings has begun with use of materials that change their state within the indoor temperature comfort zone. These materials, when melting or solidifying, respectively, absorb or release heat in the process and are known as phase change materials (PCM) (Hawes et al 1989). …”

Section: Introductionmentioning

confidence: 99%

Energy Optimized Configuration of Concrete Element with PCM

Pomianowski

2013

Energy Optimized Configuration of Concrete Element With PCM

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Latent heat storage in concrete

Cited by 132 publications

References 4 publications

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Development of ductile cementitious composites incorporating microencapsulated phase change materials

Comportamento térmico de argamassas com incorporação de Materiais de Mudança de Fase (PCM) no clima português

Energy Optimized Configuration of Concrete Element with PCM

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