Analysing the thermal and electrical properties of Cocos nucifera shell-based nanofluids as coolant feasibility proton exchange membrane fuel cell

IF 2.3 4区 工程技术 Q2 ENGINEERING, MECHANICAL
Abdul Raguman, Praveena Vedagiri
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Abstract

For an enhancement of the thermal and electrical conductivity of the proton exchange membrane fuel cell (PEMFC), extensive research is actively conducted on various waste bio sources. PEMFC offers the cleanest form of energy, an electrochemical energy conversion device that possesses zero emissions with by-products such as heat and water. In PEMFC, conventional coolants such as water and water:ethylene glycol mixture does not attain the substantial results in terms of heat dissipation, which impacts performance gradually reduces the operating life of the cell. Usually, bio-sources are environmentally friendly and have merits over chemically prepared methods. Bio-based nanofluids have remarkable performance in terms of heat transfer, lower electrical conductivity, and low corrosiveness in the system compared to other metal-based fluids and base fluids, which have also gained a great deal of scrutiny over the past few decades. In this research, bio-sourced Cocos nucifera shell (CNS) is utilised at various concentrations, such as 0.1 vol.-%, 0.3 vol.-% and 0.5 vol.-%, dispersed with a base fluid such as water (W), and ethylene glycol (EG) (80:20) is analysed prior to actual full stack PEMFC. Consequently, heat transfer has been improved by 13% for CNS in 80:20 (W:EG) at 0.5% volume concentration compared with W:EG (80:20). On the basis of findings on thermal, hydraulic and electrical conductivity, various properties have also been determined. Despite the drawbacks of the experimental design, it was concluded that up to 0.5 vol.-% CNS in an 80:20 (W:EG) nanofluid could be used as a cooling medium for PEMFCs with no adverse effects on the electrical performance. It was also observed that the nanofluid improved the efficiency of the fuel cells by reducing the ohmic losses.
分析可可壳基纳米流体作为质子交换膜燃料电池冷却剂的热学和电学特性
为了提高质子交换膜燃料电池(PEMFC)的导热性和导电性,目前正在积极开展有关各种生物废料的广泛研究。质子交换膜燃料电池提供了最清洁的能源形式,是一种零排放的电化学能源转换装置,其副产品包括热和水。在 PEMFC 中,传统的冷却剂(如水和水与乙二醇的混合物)在散热方面达不到实质性效果,从而影响性能并逐渐缩短电池的使用寿命。通常情况下,生物资源对环境友好,比化学制备方法更具优势。与其他金属基流体和基础流体相比,生物基纳米流体在传热、低导电性和系统低腐蚀性方面具有显著的性能,在过去几十年中也得到了广泛的关注。在这项研究中,生物源可可壳(CNS)以不同的浓度(如 0.1vol.-%、0.3vol.-% 和 0.5vol.-%)分散在水(W)和乙二醇(EG)(80:20)等基流体中,并在实际全堆叠 PEMFC 之前进行了分析。结果表明,与 W:EG (80:20) 相比,CNS 在 0.5% 体积浓度的 80:20 (W:EG) 中的传热性能提高了 13%。在热导率、水导率和电导率研究结果的基础上,还确定了各种特性。尽管实验设计存在缺陷,但得出的结论是,80:20(W:EG)纳米流体中高达 0.5 Vol.-% 的 CNS 可用作 PEMFC 的冷却介质,且不会对电气性能产生不利影响。研究还发现,纳米流体通过降低欧姆损耗提高了燃料电池的效率。
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来源期刊
CiteScore
3.80
自引率
16.70%
发文量
370
审稿时长
6 months
期刊介绍: The Journal of Process Mechanical Engineering publishes high-quality, peer-reviewed papers covering a broad area of mechanical engineering activities associated with the design and operation of process equipment.
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