Enhanced thermophysical properties of Metal oxide nanoparticles embedded magnesium nitrate hexahydrate based nanocomposite for thermal energy storage applications
Abstract This paper investigates the effect of metal oxide (MOx) nanoparticles on thermophysical properties of phase change material (PCM) for thermal energy storage applications. Different types of (MOx) nanoparticles include Titanium di-oxide (TiO2), Zinc oxide (ZnO), Ferric oxide (Fe2O3) and Silicon di-oxide (SiO2) were added independently in the magnesium nitrate hexahydrate, an inorganic salt hydrate PCM, to form PCM-metal oxide nanocomposite by melt mixing technique. The scanning electron microscopy was done to investigate the shape and morphology of nanoparticles and their uniform distribution in the PCM matrix. Structural and interaction between nanoparticles and PCM were analyzed by X-ray diffraction (XRD) and Fourier transformed infrared (FTIR) spectroscopic techniques, respectively. The cyclic stability of the prepared nanocomposites was confirmed by thermogravimetric analysis. Nanoparticles concentration in the PCM matrix is very crucial and needs to be carefully optimized to maximize the thermal conductivity enhancement and herein we found that 0.5 wt.% of NPs in PCM matrix show promising thermophysical properties. Thermal conductivity of PCM-metal oxide nanocomposites was improved by 147.5%, 62.5%, 55% and 45% by the addition of 0.5 wt.% TiO2, ZnO, Fe2O3 and SiO2, respectively. The addition of nanoparticles modified the phase change process of PCM nanocomposites and also reduced the phase change temperature range. Besides thermal conductivity enhancement, these also eliminate supercooling while maintain the latent heat capacity. The heat transfer characteristics of PCM-metal oxides nanocomposites were analyzed by conventional heating systems. The PCM-TiO2 nanocomposite demonstrates the best heat transfer characteristics and reduces the phase transition time performances amongst the other metal oxide nanoparticles. It was found that the charging and discharging rate increased by 33% and 77.5% respectively, upon using 0.5 wt.% TiO2 in comparison to pristine PCM and used as a potential material in instant solar water heating system for solar thermal energy storage application.
#1Chuanchang Li(CSUST: Changsha University of Science and Technology)H-Index: 1
#2Bo Zhang(CSUST: Changsha University of Science and Technology)H-Index: 1
Last. Qingxia Liu(U of A: University of Alberta)H-Index: 1
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Abstract Latent heat storage (LHS) is considered to be a promising technique for thermal energy storage, due to its high energy storage density and nearly constant working temperature. However, the phase change materials (PCMs) used in LHS usually suffer from low thermal conductivity. In this work, the expanded graphite (EG) was applied to support n-eicosane (C20) via vacuum impregnation to prepare C20/EG composite PCMs. The DSC analysis indicated that the C20/EG15 has latent heat values of 199....
Last. Farahnaz Barahuie(University of Sistan and Baluchestan)H-Index: 11
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Abstract Phase change materials (PCMs), which can absorb or release large latent heat over a defined temperature range while the phase transition occurs, have achieved huge attention due to the environmental concerns and energy crisis. In recent years, phase change material nanocomposites are extensively used in thermal energy storage and energy management. Here, a shape-stabilised PCM nanocomposite, consisting n-hetadecane as a PCM and SiO2 nanoparticles as a supportive material was successfull...
#1Meizhi He(CAS: Chinese Academy of Sciences)H-Index: 1
#2Luwei Yang(CAS: Chinese Academy of Sciences)H-Index: 9
Last. Zhenjun Ma(UOW: University of Wollongong)H-Index: 35
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Abstract This paper presents the preparation and thermal characterization of phase change materials (PCMs) enhanced by carbon-based nanoparticles, including graphene nanoplatelets (GNPs), multi-walled carbon nanotubes (MWCNTs) and nano-graphite (NG). A systematic experimental framework, consisting of material selection and preparation, material property characterization and thermal performance examination, was proposed and used in this study to facilitate the development of nano-enhanced PCMs (N...
Last. Li Lu(NUS: National University of Singapore)H-Index: 1
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The present work is focused on the phase change behavior of the lately prepared caprylic acid based composite as phase change materials (PCMs) for thermal energy storage. The composite PCMs were prepared with caprylic acid as base material whereas, CuO, ZnO, Ag and graphene oxide (GO) are used as supporting materials. The 0.5 weight fraction (wt%) of CuO, ZnO, Ag and GO nanomaterials/nanoparticles (NPs) were dispersed in caprylic acid, separately aiming to assess the maximum enhancement of therm...
#1Hui Wang(CAS: Chinese Academy of Sciences)H-Index: 37
#2Lijiang Guo(CAS: Chinese Academy of Sciences)H-Index: 4
Last. Jianqiang Li(CAS: Chinese Academy of Sciences)H-Index: 34
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The magnesium nitrate hexahydrate (MNH) based composite phase change materials (PCMs) have been prepared by adding carboxyl methyl cellulose (CMC) as thickening agent. Different mass fractions of nanoparticles (nanosilver, nanocopper and graphene) have been added independently to enhance the thermal conductivities. The viscosities have been measured for the pure MNH and MNH/CMC composites at liquid state. The thermal conductivities of the solid phase pure MNH, MNH/CMC and MNH/CMC/Nanoparticle co...
Abstract Thermal storage material involving phase change material (PCM) has attracted interest among researchers and engineers. It was found that phase change material has the capability to store and release large amount of latent heat during phase transition period. The effectiveness of these capabilities is affected by low thermal conductivity and sub-cooling characteristics. In order to increase the thermal conductivity of PCM, thermal conductive substance such as nanoparticles are added to t...
#1Chuanchang Li(CSUST: Changsha University of Science and Technology)H-Index: 22
#2Bo Zhang(CSUST: Changsha University of Science and Technology)H-Index: 3
Last. Yi Long(NTU: Nanyang Technological University)H-Index: 37
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Abstract Tankless solar water heater (TSWH) integrated phase change materials (PCMs) is a promising field due to its low cost, low heat loss, and compact structure. To obtain a composite PCMs that suitable for tankless solar water heater application, the expanded graphite (EG) in different mass fraction (2 wt.%, 6 wt.%, and 10 wt.%) were added to stearic acid (SA) via melting impregnation. The thermophysical properties including phase change temperature, latent heat, and thermal conductivity of ...
#1Zichen Song(China University of Geosciences)H-Index: 1
#2Yong Deng(China University of Geosciences)H-Index: 72
Last. Hongen Nian(CAS: Chinese Academy of Sciences)H-Index: 9
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Abstract Expanded graphite (EG) is considered as a promising supporter for phase change material (PCM) due to its unique porous structure and excellent heat transfer ability. In the study, EG with different mass fractions (9 wt.%, 13 wt.%, 16.67 wt.%, and 20 wt.%) was respectively blended with MgCl2·6H2O. The thermal conductivity data of composite PCMs with 9 wt.%, 13 wt.%, 16.67 wt.%, and 20 wt.% of EG was respectively measured to be 0.942 W/m K, 1.053 W/m K, 1.354 W/m K and 1.658 W/m K. DSC an...
Last. Brijesh Tripathi(Pandit Deendayal Petroleum University)H-Index: 14
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Abstract null null This paper provides an overview of the battery thermal management systems (BTMSs) based on the studies carried out by different researchers across the globe. The focus is on enhancing the thermal performance of the battery with the selection and incorporation of a suitable thermal management system. In addition to this, the performance enhancement of lithium-ion (Li-ion) battery systems using supercapacitor (SC) in parallel topological connection, have been discussed. The desi...
Abstract null null Alternative energy sources are gaining much popularity but their intermittent nature limits their applications. Energy storage is the main concern for the researchers working in the field of alternate energy. Phase change materials (PCMs) are very promising materials for application in energy storage systems to cater to the goal of sustainable development. Their remarkable phase change properties, high-energy storage density, and isothermal heat storage and retrieval propertie...
The multiple eutectic nitrates with a low melting point are widely used in the field of solar thermal utilization due to their good thermophysical properties. The addition of nanoparticles can improve the heat transfer and heat storage performance of nitrate. This article explored the effect of MgO nanoparticles on the thermal properties of ternary eutectic nitrates. As a result of the decomposition reaction of the Mg(OH)2 precursor at high temperature, MgO nanoparticles were synthesized in situ...
#1Hui Wang(CAS: Chinese Academy of Sciences)H-Index: 37
#2Ying Zhang(CAS: Chinese Academy of Sciences)H-Index: 22
Last. Jianqiang Li(CAS: Chinese Academy of Sciences)H-Index: 34
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Abstract Magnesium nitrate hexahydrate is a preferred material in building heat applications with a moderate temperature (89 °C), suitable latent heat (130~150 kJ·kg−1), and low cost (1000~2000 CNY/Ton). However, as the low heat source temperature in the engineering application (usually less than 150 °C), the temperature difference driving the phase transition of the phase change materials is small, resulting in the slower dynamic process of heat storage. Aiming at this problem, this paper propo...
