Investigation on Thermophysical Properties of Multi-Walled Carbon Nanotubes Enhanced Salt Hydrate Phase Change Material

IF 1 Q4 ENGINEERING, MECHANICAL
None Reji Kumar Rajamony, Mahendran Samykano, None A.K. Pandey, None S. Ramesh Babu, None M.M. Noor, None D. Ramasamy, None Johnny Koh Siaw Paw, None Sendhil Kumar Natarajan
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Abstract

Thermal Energy Storage (TES) is a valuable tool for improving the energy efficiency of renewable energy conversion systems. One of the most effective methods for harnessing thermal energy from solar sources is through energy storage using phase change materials (PCMs). However, the thermal performance of PCMs is hindered by their low thermal conductivity. This research focuses on enhancing the thermal performance of salt hydrate PCM using multi-walled carbon nanotubes (MWCNTs) and surfactants. Through experimental investigations, a salt hydrate PCM with varying concentrations of MWCNTs (ranging from 0.1% to 0.9%) was prepared using a two-step technique and their thermophysical properties were thoroughly characterized. Various techniques such as field emission scanning electron microscope, thermal conductivity analyzer, ultraviolet-visible spectrum, thermogravimetric analyzer, and Fourier transform infrared spectroscopy were utilized to study the effect of surfactant on the nanocomposites and examine their morphology, thermal conductivity, optical properties, thermal stability, and chemical stability. The results indicated that the inclusion of MWCNTs with salt hydrate significantly improved the thermal conductivity by 68.09% at a concentration of 0.7 wt %, compared to pure salt hydrate. However, this enhancement in thermal performance was accompanied by a reduction in optical transmittance in the developed nanocomposite PCM. Additionally, the formulated nanocomposite demonstrated excellent thermal and chemical stability up to temperatures as high as 468 °C. As a result, this nanocomposite shows great promise as a potential candidate for solar TES applications, offering favourable characteristics for efficient energy storage from solar sources.
多壁碳纳米管增强盐水合物相变材料的热物理性质研究
热能储存(TES)是提高可再生能源转换系统能源效率的重要工具。利用太阳能热能的最有效方法之一是利用相变材料(PCMs)进行能量存储。然而,PCMs的热性能受到其低导热系数的阻碍。本课题主要研究采用多壁碳纳米管(MWCNTs)和表面活性剂增强盐水合物PCM的热性能。通过实验研究,采用两步法制备了不同MWCNTs浓度(0.1%至0.9%)的盐水合物PCM,并对其热物理性质进行了全面表征。利用场发射扫描电镜、热导率分析仪、紫外可见光谱、热重分析仪和傅里叶变换红外光谱等技术研究了表面活性剂对纳米复合材料的影响,并对其形貌、热导率、光学性能、热稳定性和化学稳定性进行了研究。结果表明,与纯盐水合物相比,盐水合物包合MWCNTs在0.7 wt %的浓度下,导热系数显著提高68.09%。然而,在开发的纳米复合材料PCM中,这种热性能的增强伴随着光学透射率的降低。此外,配制的纳米复合材料在高达468°C的温度下表现出优异的热稳定性和化学稳定性。因此,这种纳米复合材料作为太阳能TES应用的潜在候选者显示出巨大的希望,为太阳能的高效储能提供了有利的特性。
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来源期刊
CiteScore
2.40
自引率
10.00%
发文量
43
审稿时长
20 weeks
期刊介绍: The IJAME provides the forum for high-quality research communications and addresses all aspects of original experimental information based on theory and their applications. This journal welcomes all contributions from those who wish to report on new developments in automotive and mechanical engineering fields within the following scopes. -Engine/Emission Technology Automobile Body and Safety- Vehicle Dynamics- Automotive Electronics- Alternative Energy- Energy Conversion- Fuels and Lubricants - Combustion and Reacting Flows- New and Renewable Energy Technologies- Automotive Electrical Systems- Automotive Materials- Automotive Transmission- Automotive Pollution and Control- Vehicle Maintenance- Intelligent Vehicle/Transportation Systems- Fuel Cell, Hybrid, Electrical Vehicle and Other Fields of Automotive Engineering- Engineering Management /TQM- Heat and Mass Transfer- Fluid and Thermal Engineering- CAE/FEA/CAD/CFD- Engineering Mechanics- Modeling and Simulation- Metallurgy/ Materials Engineering- Applied Mechanics- Thermodynamics- Agricultural Machinery and Equipment- Mechatronics- Automatic Control- Multidisciplinary design and optimization - Fluid Mechanics and Dynamics- Thermal-Fluids Machinery- Experimental and Computational Mechanics - Measurement and Instrumentation- HVAC- Manufacturing Systems- Materials Processing- Noise and Vibration- Composite and Polymer Materials- Biomechanical Engineering- Fatigue and Fracture Mechanics- Machine Components design- Gas Turbine- Power Plant Engineering- Artificial Intelligent/Neural Network- Robotic Systems- Solar Energy- Powder Metallurgy and Metal Ceramics- Discrete Systems- Non-linear Analysis- Structural Analysis- Tribology- Engineering Materials- Mechanical Systems and Technology- Pneumatic and Hydraulic Systems - Failure Analysis- Any other related topics.
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