International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
Studies on Impact of Phase Changing Material on Concrete for Enhancing Thermal Comfort Mohd Ehtesham Azam 1, Mohd Ishaq khan 2, Mohammed Shahnawaz 3, Touseeq Anwar wasif4 Student, Department of Civil Engineering Professor of Civil Engineering ISL Engineering College, Hyderabad, Telangana ---------------------------------------------------------------------***--------------------------------------------------------------------1, 2, 3 UG
4 Asst
Abstract - The current trend in materials science in civil
engineering is to examine the application of new technologies to improve thermal and energy performance. This tendency is exacerbated by the necessity for a building sector-wide sustainable development plan. The incorporation of a Phase Change Material (PCM) in cement used for building construction is evaluated in this article. The ability of PCMs to absorb and replenish energy is their defining feature. By embedding PCMs into the materials used in building construction, this property might be leveraged to conserve energy. Thermal energy storage systems (TES) with Phase change materials (PCM) offer attractive means of improving the thermal mass and the thermal comfort within a building. PCMs are latent heat thermal storage (LHTS) materials with high energy storage density compared to conventional sensible heat storage materials. Concrete incorporating PCM improves the thermal mass of the building which reduces the space conditioning energy consumption and extreme temperature fluctuations within the building. The heat capacity and high density of concrete coupled with latent heat storage of PCM provides a novel energy saving concepts for sustainable built environment. Microencapsulation is a latest and advanced technology for incorporation of PCM in to concrete which creates finely dispersed PCMs with high surface area for greater amount of heat transfer. The aim for this project was to determine the strength and durability characteristics of high strength structural concrete by using phase change materials, which will give a better understanding on the properties of concrete. The various proportions of phase changing material (0%, 10%, 20%, 30%) gives various result for 7thday, 14thday and 28thday of compressive strength test gives test result as compared to conventional concrete. Key Words: Thermal energy storage systems (TES); Phase change materials (PCM); latent heat thermal storage (LHTS); Phase change material (PCM)
1. INTRODUCTION Many developing nations have seen a surge in electricity consumption in the last decade, necessitating the construction of energy-efficient buildings. Construction sectors in emerging nations utilise a significant amount of energy, accounting for roughly 40% of total output [1,2]. © 2022, IRJET
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Thermal energy storage systems (TES) are a potential option for energy conservation since they may store energy for later use with either sensible thermal energy storage materials or latent heat storage materials. Latent heat is the energy necessary to alter the phase of a substance [3-5]. Steel, masonry, and water are examples of current TES materials used in the building industry. These materials are sensible heat storage materials that store thermal energy when the temperature of the material is elevated. Latent heat storage materials are known as phase changematerials (PCM), and they preferably have a solid liquid phase change [6, 7]. A phase change material (PCM) is a substance having a high heat of fusion that can store and release huge quantities of energy by melting and solidifying at a specific temperature. When a substance transforms from solid to liquid or vice versa, heat is absorbed or released [8, 9]. As a result, PCMs are categorised as latent heat storage (LHS) units. The incorporation of phase into the building system has the potential to boost the thermal storage capacity of the building envelope. PCMs may store energy at a constant or almost constant temperature, which is referred to as the PCM's phase transition temperature [10]. Cementitious materials, which are the most often used building materials, have a large potential for producing high performance heat storage materials. The heat transmission behaviour and thermal characteristics of this composite material are characterised by stimulation of thermal energy storage in concrete [11]. In the built environment, Phase Change Materials (PCM) can be utilised to limit interior temperature shift by storing latent heat in a material's solid-liquid or liquid-gas phase change[12, 13]. PCMs can store up to 14 times more thermal energy per unit volume than traditional thermal storage materials [14]. Heat is practically isothermally absorbed and released, and it is utilised to minimise the energy consumed by traditional heating and cooling systems by minimising peak loads [15, 16]. Organic and inorganic PCMs have both been employed in construction applications. Organic compounds are further subdivided into paraffins and non-paraffins[17,18]. These organic PCMs have desired features such as cohesiveness, chemical stability, non-reactivity, and recyclability [19-26]. However, in the solid form, these organic materials have a low heat conductivity. Inorganic compounds, on the other hand, have a large latent heat absorption capacity and are non-flammable. Inorganic PCMs have a higher thermal
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