23 documents found, page 1 of 3
Development of Co-Axial fibres composed of CA (Mn 50,000) and PEGs (600 and 100...
Costa, Manuel F. M.; Carneiro, Joaquim A. O.; Hammes, Nathalia; Monteiro, José; Rocha Segundo, Iran Gomes da; Felgueiras, Helena PradoRapid urbanisation and industrialisation have intensified the Urban Heat Is-land (UHI) effect, significantly increasing energy demand for thermal comfort. Urban buildings consume considerable energy throughout the year, which can be reduced by incorporating Phase Change Materials (PCMs) into building materials. PCMs effectively regulate temperature by storing and releasing heat as latent heat during phase trans...
Mitigação das Ilhas de Calor Urbanas através da Incorporação de Fibras Coaxiais...
Araújo, Vitor M. M.; Hammes, Nathalia; Lima Jr., Orlando; Zahabizadeh, Behzad; Cunha, Vítor M. C. F.; Pereira, Eduardo; Camões, Aires[Excerto] Introdução: As Ilhas de Calor Urbanas (ICU) ocorrem devido à substituição de superfícies naturais por materiais, por exemplo, cimentícios e asfálticos, que apresentam elevado calor específico e tendem a reter calor por longos períodos. Uma estratégia promissora para mitigar este efeito pode ser a utilização de argamassas com microfibras contendo materiais de mudança de fase (PCMs). Esses materiais aju...
Infrared thermography of cement mortar with phase change fibres
Hammes, Nathalia; Araújo, Vitor M. M.; Lima Jr., Orlando; Zahabizadeh, Behzad; Cunha, Vítor M. C. F.; Pereira, Eduardo; Camões, Aires; Marinho, ElinaUrban Heat Islands (UHIs), aggravated by intense urbanisation and heat-retaining materials from buildings and roads, affect the thermal comfort of human beings. To mitigate this issue, this study aims to study the thermal performance of cement mortars with coaxial polymeric fibres produced by wet spinning and containing polyethylene glycol (PEG 600 and 1000) (CM_PCF) as phase change material. Samples were irrad...
Designing CNF-reinforced coaxial phase change fibres for thermal regulation in ...
Hammes, Nathalia; Pinheiro, Inês; Lima Jr., Orlando; Marinho, Elina; Silva, Mauela; Felgueiras, Helena; Costa, Manuel F. M.; Rocha Segundo, Iran[Excerto] Urban Heat Islands (UHIs), intensified by the high thermal retention capacity of conventional construction materials, contribute to elevated temperatures in urban areas, compromising indoor thermal comfort and directly impacting the health and well-being of the population. As a mitigation strategy, the incorporation of coaxial fibres with phase change materials (PCFs) stands out for their ability to p...
Designing coaxial polymeric fibres with phase change materials for thermal regu...
Hammes, Nathalia; Monteiro, José; Lima Jr., Orlando; Marinho, Elina; Silva, M. Manuela P.; Felgueiras, Helena; Costa, Manuel F. M.; Rocha Segundo, Iran[Abstract] Urban expansion and the widespread use of heat-absorbing materials have intensified the Urban Heat Island (UHI) effect. As a result, rising surface temperatures pose significant challenges to energy efficiency, human well-being, and environmental quality. Incorporation of phase change materials (PCMs) into civil engineering materials (CEM) has emerged as a promising passive strategy for thermal regul...
Desenvolvimento de fibras coaxiais compostas por materiais mudança de fase para...
Monteiro, José Diogo Xavier; Hammes, Nathalia; Rocha Segundo, Iran Gomes da; Felgueiras, Helena Prado; Martins da Silva, Mariana; Behzad Zahabizadeh[Excerto] O aumento do impacto das Ilhas de Calor Urbano exige soluções sustentáveis que melhorem o conforto térmico para a população. Este estudo procura mitigar esta problemática através do uso experimental de Fibras poliméricas coaxiais com materiais de Mudança de Fase incorporados (PCFs). Estas apresentam um Material Mudança de Fase (PCM), o Polietileno Glicol (PEG400, 600, 800 e 1000) no núcleo e Acetato d...
Thermal behavior of phase change fibers for urban heat island effect mitigation
Monteiro, José Diogo Xavier; Hammes, Nathalia; Rocha Segundo, Iran Gomes da; Felgueiras, Helena Prado; Silva, M. Manuela; Costa, Manuel Filipe Pedrosa[Excerpt] Portugal is the country most affected by thermal discomfort in Europe, with over 38.0% of its population lacking adequate thermal comfort at home. This study highlights the urgent need for solutions to improve energy efficiency and living conditions. Phase Change Fibers (PCFs) offer a sustainable solution, addressing thermal discomfort year-round by reducing reliance on heating and cooling systems by ...
Coaxial fibres incorporated with phase change materials for thermoregulation ap...
Hammes, Nathalia; Pinheiro, Claver Giovanni Silveira; Rocha Segundo, Iran Gomes da; Homem, Natália Cândido; Silva, Maria ManuelaNowadays, the growing concern about improving thermal comfort in different structures (textiles, buildings, and pavements, among others) has stimulated research into phase change materials (PCMs). The direct incorporation of PCMs into composite materials can cause mechanical impacts. Therefore, this study focuses on the design of phase change coaxial fibres (PCFs), using commercial cellulose acetate (CA) or rec...
Evaluation of the mechanical properties of asphalt mixtures modified with coaxi...
Pinheiro, Claver Giovanni Silveira; Hammes, Nathalia; Homem, Natália Cândido; Rocha Segundo, Iran Gomes da; Felgueiras, Helena PradoThis paper presents a mechanical approach to assess the feasibility of utilising Phase Change Material (PCM) embedded within coaxial fibres for mitigating Urban Heat Island effects in asphalt concrete (AC). The fibres, made via wet spinning, consist of a polyethene glycol core surrounded by a cellulose acetate sheath. Using the Response Surface Method (RSM) and the Design of Experiments (DoE), the study investi...
Exploring thermal performance of PCM fibre-reinforced asphalt mixtures: a desig...
Pinheiro, Claver Giovanni Silveira; Hammes, Nathalia; Homem, Natália Cândido; Rocha Segundo, Iran Gomes da; Felgueiras, Helena PradoThis study explores the impact of Phase Change Fibres (PCF) in asphalt mixtures on urban heat control and pavement durability, especially under diverse climate conditions. The incorporation of PCF in pavements offers an adaptive response to temperature fluctuations, presenting a promising approach for urban resilience and sustainable infrastructure development. The research involves coaxial fibres produced via ...